diff --git a/importSampleData/app/main.go b/importSampleData/app/main.go
index 6996047026..61de6e740c 100644
--- a/importSampleData/app/main.go
+++ b/importSampleData/app/main.go
@@ -7,7 +7,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"github.com/taosdata/TDengine/importSampleData/import"
 	"hash/crc32"
 	"io"
 	"log"
@@ -18,88 +17,89 @@ import (
 	"sync"
 	"time"
 
+	dataimport "github.com/taosdata/TDengine/importSampleData/import"
+
 	_ "github.com/taosdata/driver-go/taosSql"
 )
 
 const (
-	TIMESTAMP  = "timestamp"
-	DATETIME  = "datetime"
-	MILLISECOND  = "millisecond"
-	DEFAULT_STARTTIME int64 = -1
-	DEFAULT_INTERVAL int64 = 1*1000
-	DEFAULT_DELAY int64 = -1
-	DEFAULT_STATISTIC_TABLE = "statistic"
+	TIMESTAMP                     = "timestamp"
+	DATETIME                      = "datetime"
+	MILLISECOND                   = "millisecond"
+	DEFAULT_STARTTIME       int64 = -1
+	DEFAULT_INTERVAL        int64 = 1 * 1000
+	DEFAULT_DELAY           int64 = -1
+	DEFAULT_STATISTIC_TABLE       = "statistic"
 
-	JSON_FORMAT = "json"
-	CSV_FORMAT = "csv"
+	JSON_FORMAT       = "json"
+	CSV_FORMAT        = "csv"
 	SUPERTABLE_PREFIX = "s_"
-	SUBTABLE_PREFIX = "t_"
+	SUBTABLE_PREFIX   = "t_"
 
-	DRIVER_NAME = "taosSql"
+	DRIVER_NAME      = "taosSql"
 	STARTTIME_LAYOUT = "2006-01-02 15:04:05.000"
-	INSERT_PREFIX = "insert into "
+	INSERT_PREFIX    = "insert into "
 )
 
 var (
-
-	cfg string
-	cases   string
-	hnum    int
-	vnum  int
-	thread  int
-	batch  int
-	auto		int
-	starttimestr  string
-	interval	int64
-	host       string
-	port       int
-	user       string
-	password   string
-	dropdb   int
-	db         string
-	dbparam		string
+	cfg          string
+	cases        string
+	hnum         int
+	vnum         int
+	thread       int
+	batch        int
+	auto         int
+	starttimestr string
+	interval     int64
+	host         string
+	port         int
+	user         string
+	password     string
+	dropdb       int
+	db           string
+	dbparam      string
 
 	dataSourceName string
-	startTime  int64
+	startTime      int64
 
-	superTableConfigMap  = make(map[string]*superTableConfig)
-	subTableMap	= make(map[string]*dataRows)
-	scaleTableNames []string
+	superTableConfigMap = make(map[string]*superTableConfig)
+	subTableMap         = make(map[string]*dataRows)
+	scaleTableNames     []string
 
 	scaleTableMap = make(map[string]*scaleTableInfo)
 
-	successRows []int64
+	successRows    []int64
 	lastStaticTime time.Time
-	lastTotalRows int64
-	timeTicker *time.Ticker
-	delay int64  // default 10 milliseconds
-	tick int64
-	save int
-	saveTable string
+	lastTotalRows  int64
+	timeTicker     *time.Ticker
+	delay          int64 // default 10 milliseconds
+	tick           int64
+	save           int
+	saveTable      string
 )
 
 type superTableConfig struct {
-	startTime int64
-	endTime int64
-	cycleTime int64
+	startTime   int64
+	endTime     int64
+	cycleTime   int64
 	avgInterval int64
-	config dataimport.CaseConfig
+	config      dataimport.CaseConfig
 }
 
 type scaleTableInfo struct {
 	scaleTableName string
-	subTableName string
-	insertRows int64
+	subTableName   string
+	insertRows     int64
 }
 
 type tableRows struct {
-	tableName string  // tableName
-	value string      // values(...)
+	tableName string // tableName
+	value     string // values(...)
 }
 
 type dataRows struct {
-	rows         []map[string]interface{}
-	config       dataimport.CaseConfig
+	rows   []map[string]interface{}
+	config dataimport.CaseConfig
 }
 
 func (rows dataRows) Len() int {
@@ -127,10 +127,10 @@ func init() {
 
 	if db == "" {
 		//db = "go"
-		db = fmt.Sprintf("test_%s",time.Now().Format("20060102"))
+		db = fmt.Sprintf("test_%s", time.Now().Format("20060102"))
 	}
 
-	if auto == 1 && len(starttimestr) == 0  {
+	if auto == 1 && len(starttimestr) == 0 {
 		log.Fatalf("startTime must be set when auto is 1, the format is \"yyyy-MM-dd HH:mm:ss.SSS\" ")
 	}
 
@@ -141,7 +141,7 @@ func init() {
 		}
 
 		startTime = t.UnixNano() / 1e6 // as millisecond
-	}else{
+	} else {
 		startTime = DEFAULT_STARTTIME
 	}
 
@@ -179,7 +179,7 @@ func main() {
 
 		_, exists := superTableConfigMap[caseConfig.Stname]
 		if !exists {
-			superTableConfigMap[caseConfig.Stname] = &superTableConfig{config:caseConfig}
+			superTableConfigMap[caseConfig.Stname] = &superTableConfig{config: caseConfig}
 		} else {
 			log.Fatalf("the stname of case %s already exist.\n", caseConfig.Stname)
 		}
@@ -201,9 +201,9 @@ func main() {
 
 	if DEFAULT_DELAY == delay {
 		// default delay
-		delay =  caseMinumInterval / 2
+		delay = caseMinumInterval / 2
 		if delay < 1 {
-				delay = 1
+			delay = 1
 		}
 		log.Printf("actual delay is %d ms.", delay)
 	}
@@ -232,7 +232,7 @@ func main() {
 	filePerThread := subTableNum / thread
 	leftFileNum := subTableNum % thread
 
-	var wg  sync.WaitGroup
+	var wg sync.WaitGroup
 
 	start = time.Now()
 
@@ -255,31 +255,31 @@ func main() {
 	go staticSpeed()
 	wg.Wait()
 
-	usedTime :=  time.Since(start)
+	usedTime := time.Since(start)
 
 	total := getTotalRows(successRows)
 
-	log.Printf("finished insert %d rows, used %d ms, speed %d rows/s", total, usedTime/1e6, total * 1e9 / int64(usedTime))
+	log.Printf("finished insert %d rows, used %d ms, speed %d rows/s", total, usedTime/1e6, total*1e3/usedTime.Milliseconds())
 
 	if vnum == 0 {
 		// continue waiting for insert data
-		wait :=  make(chan string)
-		v := <- wait
+		wait := make(chan string)
+		v := <-wait
 		log.Printf("program receive %s, exited.\n", v)
-	}else{
+	} else {
 		timeTicker.Stop()
 	}
 
 }
 
-func staticSpeed(){
+func staticSpeed() {
 
 	connection := getConnection()
 	defer connection.Close()
 
 	if save == 1 {
 		connection.Exec("use " + db)
-		_, err := connection.Exec("create table if not exists " + saveTable +"(ts timestamp, speed int)")
+		_, err := connection.Exec("create table if not exists " + saveTable + "(ts timestamp, speed int)")
 		if err != nil {
 			log.Fatalf("create %s Table error: %s\n", saveTable, err)
 		}
@@ -287,13 +287,13 @@ func staticSpeed(){
 
 	for {
 		<-timeTicker.C
-		
+
 		currentTime := time.Now()
 		usedTime := currentTime.UnixNano() - lastStaticTime.UnixNano()
-	
+
 		total := getTotalRows(successRows)
 		currentSuccessRows := total - lastTotalRows
-		
+
 		speed := currentSuccessRows * 1e9 / int64(usedTime)
 		log.Printf("insert %d rows, used %d ms, speed %d rows/s", currentSuccessRows, usedTime/1e6, speed)
 
@@ -301,14 +301,14 @@ func staticSpeed(){
 			insertSql := fmt.Sprintf("insert into %s values(%d, %d)", saveTable, currentTime.UnixNano()/1e6, speed)
 			connection.Exec(insertSql)
 		}
-		
+
 		lastStaticTime = currentTime
 		lastTotalRows = total
 	}
 
 }
 
-func getTotalRows(successRows []int64) int64{
+func getTotalRows(successRows []int64) int64 {
 	var total int64 = 0
 	for j := 0; j < len(successRows); j++ {
 		total += successRows[j]
@@ -316,18 +316,18 @@ func getTotalRows(successRows []int64) int64{
 	return total
 }
 
-func getSuperTableTimeConfig(fileRows dataRows) (start, cycleTime, avgInterval int64){
+func getSuperTableTimeConfig(fileRows dataRows) (start, cycleTime, avgInterval int64) {
 	if auto == 1 {
 		// use auto generate data time
 		start = startTime
 		avgInterval = interval
 		maxTableRows := normalizationDataWithSameInterval(fileRows, avgInterval)
-		cycleTime = maxTableRows * avgInterval + avgInterval
+		cycleTime = maxTableRows*avgInterval + avgInterval
 
 	} else {
 
 		// use the sample data primary timestamp
-		sort.Sort(fileRows)// sort the file data by the primarykey
+		sort.Sort(fileRows) // sort the file data by the primarykey
 		minTime := getPrimaryKey(fileRows.rows[0][fileRows.config.Timestamp])
 		maxTime := getPrimaryKey(fileRows.rows[len(fileRows.rows)-1][fileRows.config.Timestamp])
 
@@ -340,21 +340,21 @@ func getSuperTableTimeConfig(fileRows dataRows) (start, cycleTime, avgInterval i
 
 		if minTime == maxTime {
 			avgInterval = interval
-			cycleTime = tableNum * avgInterval + avgInterval
-		}else{
+			cycleTime = tableNum*avgInterval + avgInterval
+		} else {
 			avgInterval = (maxTime - minTime) / int64(len(fileRows.rows)) * tableNum
 			cycleTime = maxTime - minTime + avgInterval
 		}
-	
+
 	}
 	return
 }
 
-func createStatisticTable(){
+func createStatisticTable() {
 	connection := getConnection()
 	defer connection.Close()
 
-	_, err := connection.Exec("create table if not exist " + db + "."+ saveTable +"(ts timestamp, speed int)")
+	_, err := connection.Exec("create table if not exist " + db + "." + saveTable + "(ts timestamp, speed int)")
 	if err != nil {
 		log.Fatalf("createStatisticTable error: %s\n", err)
 	}
@@ -379,8 +379,8 @@ func createSubTable(subTableMaps map[string]*dataRows) {
 			tableName := getScaleSubTableName(subTableName, i)
 
 			scaleTableMap[tableName] = &scaleTableInfo{
-				subTableName:   subTableName,
-				insertRows: 0,
+				subTableName: subTableName,
+				insertRows:   0,
 			}
 			scaleTableNames = append(scaleTableNames, tableName)
 
@@ -389,12 +389,12 @@ func createSubTable(subTableMaps map[string]*dataRows) {
 			buffers.WriteString(" using ")
 			buffers.WriteString(superTableName)
 			buffers.WriteString(" tags(")
-			for _, tag := range subTableMaps[subTableName].config.Tags{
+			for _, tag := range subTableMaps[subTableName].config.Tags {
 				tagValue := fmt.Sprintf("%v", tagValues[strings.ToLower(tag.Name)])
 				buffers.WriteString("'" + tagValue + "'")
 				buffers.WriteString(",")
 			}
-			buffers.Truncate(buffers.Len()-1)
+			buffers.Truncate(buffers.Len() - 1)
 			buffers.WriteString(")")
 
 			createTableSql := buffers.String()
@@ -451,14 +451,14 @@ func createSuperTable(superTableConfigMap map[string]*superTableConfig) {
 			buffer.WriteString(field.Name + " " + field.Type + ",")
 		}
 
-		buffer.Truncate(buffer.Len()-1)
+		buffer.Truncate(buffer.Len() - 1)
 		buffer.WriteString(") tags( ")
 
 		for _, tag := range superTableConf.config.Tags {
 			buffer.WriteString(tag.Name + " " + tag.Type + ",")
 		}
 
-		buffer.Truncate(buffer.Len()-1)
+		buffer.Truncate(buffer.Len() - 1)
 		buffer.WriteString(")")
 
 		createSql := buffer.String()
@@ -475,16 +475,15 @@ func createSuperTable(superTableConfigMap map[string]*superTableConfig) {
 
 func getScaleSubTableName(subTableName string, hnum int) string {
 	if hnum == 0 {
-		 return subTableName
+		return subTableName
 	}
-	return fmt.Sprintf(  "%s_%d", subTableName, hnum)
+	return fmt.Sprintf("%s_%d", subTableName, hnum)
 }
 
 func getSuperTableName(stname string) string {
 	return SUPERTABLE_PREFIX + stname
 }
 
-
 /**
 * normalizationData , and return the num of subTables
  */
@@ -505,12 +504,12 @@ func normalizationData(fileRows dataRows, minTime int64) int64 {
 		value, ok := subTableMap[subTableName]
 		if !ok {
 			subTableMap[subTableName] = &dataRows{
-				rows:         []map[string]interface{}{row},
-				config:       fileRows.config,
+				rows:   []map[string]interface{}{row},
+				config: fileRows.config,
 			}
 
 			tableNum++
-		}else{
+		} else {
 			value.rows = append(value.rows, row)
 		}
 	}
@@ -518,9 +517,9 @@ func normalizationData(fileRows dataRows, minTime int64) int64 {
 }
 
 // return the maximum table rows
-func normalizationDataWithSameInterval(fileRows dataRows, avgInterval int64) int64{
+func normalizationDataWithSameInterval(fileRows dataRows, avgInterval int64) int64 {
 	// subTableMap
-	currSubTableMap	:= make(map[string]*dataRows)
+	currSubTableMap := make(map[string]*dataRows)
 	for _, row := range fileRows.rows {
 		// get subTableName
 		tableValue := getSubTableNameValue(row[fileRows.config.SubTableName])
@@ -534,10 +533,10 @@ func normalizationDataWithSameInterval(fileRows dataRows, avgInterval int64) int
 		if !ok {
 			row[fileRows.config.Timestamp] = 0
 			currSubTableMap[subTableName] = &dataRows{
-				rows:         []map[string]interface{}{row},
-				config:       fileRows.config,
+				rows:   []map[string]interface{}{row},
+				config: fileRows.config,
 			}
-		}else{
+		} else {
 			row[fileRows.config.Timestamp] = int64(len(value.rows)) * avgInterval
 			value.rows = append(value.rows, row)
 		}
@@ -545,7 +544,7 @@ func normalizationDataWithSameInterval(fileRows dataRows, avgInterval int64) int
 	}
 
 	var maxRows, tableRows int = 0, 0
-	for tableName := range currSubTableMap{
+	for tableName := range currSubTableMap {
 		tableRows = len(currSubTableMap[tableName].rows)
 		subTableMap[tableName] = currSubTableMap[tableName] // add to global subTableMap
 		if tableRows > maxRows {
@@ -556,13 +555,11 @@ func normalizationDataWithSameInterval(fileRows dataRows, avgInterval int64) int
 	return int64(maxRows)
 }
 
-
-func getSubTableName(subTableValue string, superTableName string)  string {
+func getSubTableName(subTableValue string, superTableName string) string {
 	return SUBTABLE_PREFIX + subTableValue + "_" + superTableName
 }
 
-
-func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []int64) {
+func insertData(threadIndex, start, end int, wg *sync.WaitGroup, successRows []int64) {
 	connection := getConnection()
 	defer connection.Close()
 	defer wg.Done()
@@ -591,9 +588,9 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 			var tableEndTime int64
 			if vnum == 0 {
 				// need continue generate data
-				tableEndTime = time.Now().UnixNano()/1e6
-			}else {	
-				tableEndTime = tableStartTime + superTableConf.cycleTime * int64(vnum) - superTableConf.avgInterval
+				tableEndTime = time.Now().UnixNano() / 1e6
+			} else {
+				tableEndTime = tableStartTime + superTableConf.cycleTime*int64(vnum) - superTableConf.avgInterval
 			}
 
 			insertRows := scaleTableMap[tableName].insertRows
@@ -603,10 +600,10 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 				rowIndex := insertRows % subTableRows
 				currentRow := subTableInfo.rows[rowIndex]
 
-				currentTime := getPrimaryKey(currentRow[subTableInfo.config.Timestamp]) + loopNum * superTableConf.cycleTime + tableStartTime
+				currentTime := getPrimaryKey(currentRow[subTableInfo.config.Timestamp]) + loopNum*superTableConf.cycleTime + tableStartTime
 				if currentTime <= tableEndTime {
 					// append
-					
+
 					if lastTableName != tableName {
 						buffers.WriteString(tableName)
 						buffers.WriteString(" values")
@@ -616,22 +613,22 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 					buffers.WriteString("(")
 					buffers.WriteString(fmt.Sprintf("%v", currentTime))
 					buffers.WriteString(",")
-					
+
 					// fieldNum := len(subTableInfo.config.Fields)
-					for _,field := range subTableInfo.config.Fields {
+					for _, field := range subTableInfo.config.Fields {
 						buffers.WriteString(getFieldValue(currentRow[strings.ToLower(field.Name)]))
 						buffers.WriteString(",")
 						// if( i != fieldNum -1){
-							
+
 						// }
 					}
 
-					buffers.Truncate(buffers.Len()-1)
+					buffers.Truncate(buffers.Len() - 1)
 					buffers.WriteString(") ")
 
 					appendRows++
 					insertRows++
-					if  appendRows == batch {
+					if appendRows == batch {
 						// executebatch
 						insertSql := buffers.String()
 						connection.Exec("use " + db)
@@ -645,7 +642,7 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 						lastTableName = ""
 						appendRows = 0
 					}
-				}else {
+				} else {
 					// finished insert current table
 					break
 				}
@@ -654,14 +651,14 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 			scaleTableMap[tableName].insertRows = insertRows
 
 		}
-		
+
 		// left := len(rows)
-		if  appendRows > 0 {
+		if appendRows > 0 {
 			// executebatch
 			insertSql := buffers.String()
 			connection.Exec("use " + db)
 			affectedRows := executeBatchInsert(insertSql, connection)
-			
+
 			successRows[threadIndex] += affectedRows
 			currSuccessRows += affectedRows
 
@@ -676,7 +673,7 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 			break
 		}
 
-		if(num == 0){
+		if num == 0 {
 			wg.Done() //finished insert history data
 			num++
 		}
@@ -691,7 +688,7 @@ func insertData(threadIndex, start, end int, wg  *sync.WaitGroup, successRows []
 
 }
 
-func buildSql(rows []tableRows) string{
+func buildSql(rows []tableRows) string {
 
 	var lastTableName string
 
@@ -709,7 +706,7 @@ func buildSql(rows []tableRows) string{
 
 		if lastTableName == row.tableName {
 			buffers.WriteString(row.value)
-		}else {
+		} else {
 			buffers.WriteString(" ")
 			buffers.WriteString(row.tableName)
 			buffers.WriteString(" values")
@@ -722,7 +719,7 @@ func buildSql(rows []tableRows) string{
 	return inserSql
 }
 
-func buildRow(tableName string, currentTime int64, subTableInfo *dataRows, currentRow map[string]interface{}) tableRows{
+func buildRow(tableName string, currentTime int64, subTableInfo *dataRows, currentRow map[string]interface{}) tableRows {
 
 	tableRows := tableRows{tableName: tableName}
 
@@ -732,12 +729,12 @@ func buildRow(tableName string, currentTime int64, subTableInfo *dataRows, curre
 	buffers.WriteString(fmt.Sprintf("%v", currentTime))
 	buffers.WriteString(",")
 
-	for _,field := range subTableInfo.config.Fields {
+	for _, field := range subTableInfo.config.Fields {
 		buffers.WriteString(getFieldValue(currentRow[strings.ToLower(field.Name)]))
 		buffers.WriteString(",")
 	}
 
-	buffers.Truncate(buffers.Len()-1)
+	buffers.Truncate(buffers.Len() - 1)
 	buffers.WriteString(")")
 
 	insertSql := buffers.String()
@@ -764,7 +761,7 @@ func getFieldValue(fieldValue interface{}) string {
 	return fmt.Sprintf("'%v'", fieldValue)
 }
 
-func getConnection() *sql.DB{
+func getConnection() *sql.DB {
 	db, err := sql.Open(DRIVER_NAME, dataSourceName)
 	if err != nil {
 		panic(err)
@@ -772,7 +769,6 @@ func getConnection() *sql.DB{
 	return db
 }
 
-
 func getSubTableNameValue(suffix interface{}) string {
 	return fmt.Sprintf("%v", suffix)
 }
@@ -950,7 +946,7 @@ func parseMillisecond(str interface{}, layout string) int64 {
 		log.Println(err)
 		return -1
 	}
-	return  t.UnixNano()/1e6
+	return t.UnixNano() / 1e6
 }
 
 // lowerMapKey transfer all the map key to lowercase
@@ -1009,7 +1005,7 @@ func checkUserCaseConfig(caseName string, caseConfig *dataimport.CaseConfig) {
 			if i < len(caseConfig.Fields)-1 {
 				// delete middle item,  a = a[:i+copy(a[i:], a[i+1:])]
 				caseConfig.Fields = caseConfig.Fields[:i+copy(caseConfig.Fields[i:], caseConfig.Fields[i+1:])]
-			}else {
+			} else {
 				// delete the last item
 				caseConfig.Fields = caseConfig.Fields[:len(caseConfig.Fields)-1]
 			}
@@ -1057,7 +1053,7 @@ func parseArg() {
 	flag.Parse()
 }
 
-func printArg()  {
+func printArg() {
 	fmt.Println("used param: ")
 	fmt.Println("-cfg: ", cfg)
 	fmt.Println("-cases:", cases)
diff --git a/importSampleData/bin/taosimport b/importSampleData/bin/taosimport
deleted file mode 100755
index 235fde9f06..0000000000
Binary files a/importSampleData/bin/taosimport and /dev/null differ
diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index 40b4c43fdd..f652c65f56 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -51,18 +51,15 @@
 # number of threads per CPU core
 # numOfThreadsPerCore   1.0
 
-# number of vnodes per core in DNode
-# numOfVnodesPerCore    8
+# number of vgroups per db
+# maxVgroupsPerDb       0
+
+# max number of tables per vnode
+# maxTablesPerVnode     1000000
 
 # the ratio of threads responsible for querying in the total thread
 # ratioOfQueryThreads   0.5
 
-# number of total vnodes in DNode
-# numOfTotalVnodes      0
-
-# max number of tables per vnode
-# maxtablesPerVnode     1000
-
 # interval of check load balance when the management node is in normal operation
 # balanceInterval       300
 
diff --git a/src/client/inc/tscLog.h b/src/client/inc/tscLog.h
index 94adcfe17a..9d01edae36 100644
--- a/src/client/inc/tscLog.h
+++ b/src/client/inc/tscLog.h
@@ -27,11 +27,11 @@ extern int32_t tscEmbedded;
 
 #define tscFatal(...) { if (cDebugFlag & DEBUG_FATAL) { taosPrintLog("TSC FATAL ", tscEmbedded ? 255 : cDebugFlag, __VA_ARGS__); }}
 #define tscError(...) { if (cDebugFlag & DEBUG_ERROR) { taosPrintLog("TSC ERROR ", tscEmbedded ? 255 : cDebugFlag, __VA_ARGS__); }}
-#define tscWarn(...)  { if (cDebugFlag & DEBUG_WARN)  { taosPrintLog("TSC WARN  ", tscEmbedded ? 255 : cDebugFlag, __VA_ARGS__); }}
-#define tscInfo(...)  { if (cDebugFlag & DEBUG_INFO)  { taosPrintLog("TSC INFO  ", tscEmbedded ? 255 : cDebugFlag, __VA_ARGS__); }}
-#define tscDebug(...) { if (cDebugFlag & DEBUG_DEBUG) { taosPrintLog("TSC DEBUG ", cDebugFlag, __VA_ARGS__); }}
-#define tscTrace(...) { if (cDebugFlag & DEBUG_TRACE) { taosPrintLog("TSC TRACE ", cDebugFlag, __VA_ARGS__); }}
-#define tscDebugL(...){ if (cDebugFlag & DEBUG_DEBUG) { taosPrintLongString("TSC DEBUG ", cDebugFlag, __VA_ARGS__); }}
+#define tscWarn(...)  { if (cDebugFlag & DEBUG_WARN)  { taosPrintLog("TSC WARN ", tscEmbedded ? 255 : cDebugFlag, __VA_ARGS__); }}
+#define tscInfo(...)  { if (cDebugFlag & DEBUG_INFO)  { taosPrintLog("TSC ", tscEmbedded ? 255 : cDebugFlag, __VA_ARGS__); }}
+#define tscDebug(...) { if (cDebugFlag & DEBUG_DEBUG) { taosPrintLog("TSC ", cDebugFlag, __VA_ARGS__); }}
+#define tscTrace(...) { if (cDebugFlag & DEBUG_TRACE) { taosPrintLog("TSC ", cDebugFlag, __VA_ARGS__); }}
+#define tscDebugL(...){ if (cDebugFlag & DEBUG_DEBUG) { taosPrintLongString("TSC ", cDebugFlag, __VA_ARGS__); }}
 
 #ifdef __cplusplus
 }
diff --git a/src/client/inc/tscUtil.h b/src/client/inc/tscUtil.h
index 4992692109..4af929bf41 100644
--- a/src/client/inc/tscUtil.h
+++ b/src/client/inc/tscUtil.h
@@ -160,7 +160,9 @@ void tscFieldInfoUpdateOffsetForInterResult(SQueryInfo* pQueryInfo);
 
 int16_t tscFieldInfoGetOffset(SQueryInfo* pQueryInfo, int32_t index);
 void    tscFieldInfoClear(SFieldInfo* pFieldInfo);
-int32_t tscNumOfFields(SQueryInfo* pQueryInfo);
+
+static FORCE_INLINE int32_t tscNumOfFields(SQueryInfo* pQueryInfo) { return pQueryInfo->fieldsInfo.numOfOutput; }
+
 int32_t tscFieldInfoCompare(const SFieldInfo* pFieldInfo1, const SFieldInfo* pFieldInfo2);
 
 void addExprParams(SSqlExpr* pExpr, char* argument, int32_t type, int32_t bytes, int16_t tableIndex);
diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index a398ad659e..be82eb64a8 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -412,7 +412,44 @@ char *tscGetErrorMsgPayload(SSqlCmd *pCmd);
 int32_t tscInvalidSQLErrMsg(char *msg, const char *additionalInfo, const char *sql);
 
 int32_t tscToSQLCmd(SSqlObj *pSql, struct SSqlInfo *pInfo);
-void    tscGetResultColumnChr(SSqlRes *pRes, SFieldInfo* pFieldInfo, int32_t column);
+//void    tscGetResultColumnChr(SSqlRes *pRes, SFieldInfo* pFieldInfo, int32_t column);
+
+static FORCE_INLINE void tscGetResultColumnChr(SSqlRes* pRes, SFieldInfo* pFieldInfo, int32_t columnIndex) {
+  SFieldSupInfo* pInfo = (SFieldSupInfo*) TARRAY_GET_ELEM(pFieldInfo->pSupportInfo, columnIndex);
+  assert(pInfo->pSqlExpr != NULL);
+
+  int32_t type = pInfo->pSqlExpr->resType;
+  int32_t bytes = pInfo->pSqlExpr->resBytes;
+
+  char* pData = pRes->data + pInfo->pSqlExpr->offset * pRes->numOfRows + bytes * pRes->row;
+
+  if (type == TSDB_DATA_TYPE_NCHAR || type == TSDB_DATA_TYPE_BINARY) {
+    int32_t realLen = varDataLen(pData);
+    assert(realLen <= bytes - VARSTR_HEADER_SIZE);
+
+    if (isNull(pData, type)) {
+      pRes->tsrow[columnIndex] = NULL;
+    } else {
+      pRes->tsrow[columnIndex] = ((tstr*)pData)->data;
+    }
+
+    if (realLen < pInfo->pSqlExpr->resBytes - VARSTR_HEADER_SIZE) { // todo refactor
+      *(pData + realLen + VARSTR_HEADER_SIZE) = 0;
+    }
+
+    pRes->length[columnIndex] = realLen;
+  } else {
+    assert(bytes == tDataTypeDesc[type].nSize);
+
+    if (isNull(pData, type)) {
+      pRes->tsrow[columnIndex] = NULL;
+    } else {
+      pRes->tsrow[columnIndex] = pData;
+    }
+
+    pRes->length[columnIndex] = bytes;
+  }
+}
 
 extern void *    tscCacheHandle;
 extern void *    tscTmr;
diff --git a/src/client/src/TSDBJNIConnector.c b/src/client/src/TSDBJNIConnector.c
index eb9b1cb479..549a0e8d0d 100644
--- a/src/client/src/TSDBJNIConnector.c
+++ b/src/client/src/TSDBJNIConnector.c
@@ -24,10 +24,10 @@
 
 #define jniFatal(...) { if (jniDebugFlag & DEBUG_FATAL) { taosPrintLog("JNI FATAL ", tscEmbedded ? 255 : jniDebugFlag, __VA_ARGS__); }}
 #define jniError(...) { if (jniDebugFlag & DEBUG_ERROR) { taosPrintLog("JNI ERROR ", tscEmbedded ? 255 : jniDebugFlag, __VA_ARGS__); }}
-#define jniWarn(...)  { if (jniDebugFlag & DEBUG_WARN)  { taosPrintLog("JNI WARN  ", tscEmbedded ? 255 : jniDebugFlag, __VA_ARGS__); }}
-#define jniInfo(...)  { if (jniDebugFlag & DEBUG_INFO)  { taosPrintLog("JNI INFO  ", tscEmbedded ? 255 : jniDebugFlag, __VA_ARGS__); }}
-#define jniDebug(...) { if (jniDebugFlag & DEBUG_DEBUG) { taosPrintLog("JNI DEBUG ", jniDebugFlag, __VA_ARGS__); }}
-#define jniTrace(...) { if (jniDebugFlag & DEBUG_TRACE) { taosPrintLog("JNI TRACE ", jniDebugFlag, __VA_ARGS__); }}
+#define jniWarn(...)  { if (jniDebugFlag & DEBUG_WARN)  { taosPrintLog("JNI WARN ", tscEmbedded ? 255 : jniDebugFlag, __VA_ARGS__); }}
+#define jniInfo(...)  { if (jniDebugFlag & DEBUG_INFO)  { taosPrintLog("JNI ", tscEmbedded ? 255 : jniDebugFlag, __VA_ARGS__); }}
+#define jniDebug(...) { if (jniDebugFlag & DEBUG_DEBUG) { taosPrintLog("JNI ", jniDebugFlag, __VA_ARGS__); }}
+#define jniTrace(...) { if (jniDebugFlag & DEBUG_TRACE) { taosPrintLog("JNI ", jniDebugFlag, __VA_ARGS__); }}
 
 int __init = 0;
 
diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index 41464aa660..6ab4eeaa8a 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -43,8 +43,9 @@ void doAsyncQuery(STscObj* pObj, SSqlObj* pSql, void (*fp)(), void* param, const
   pSql->signature = pSql;
   pSql->param     = param;
   pSql->pTscObj   = pObj;
-  pSql->maxRetry  = TSDB_MAX_REPLICA_NUM;
+  pSql->maxRetry  = TSDB_MAX_REPLICA;
   pSql->fp        = fp;
+  pSql->fetchFp   = fp;
 
   pSql->sqlstr = calloc(1, sqlLen + 1);
   if (pSql->sqlstr == NULL) {
@@ -53,7 +54,7 @@ void doAsyncQuery(STscObj* pObj, SSqlObj* pSql, void (*fp)(), void* param, const
     return;
   }
 
-  strtolower(pSql->sqlstr, sqlstr);
+  strntolower(pSql->sqlstr, sqlstr, sqlLen);
 
   tscDebugL("%p SQL: %s", pSql, pSql->sqlstr);
   pSql->cmd.curSql = pSql->sqlstr;
@@ -159,7 +160,7 @@ static void tscProcessAsyncRetrieveImpl(void *param, TAOS_RES *tres, int numOfRo
       pRes->code = numOfRows;
     }
 
-    tscQueueAsyncError(pSql->fetchFp, param, pRes->code);
+    tscQueueAsyncRes(pSql);
     return;
   }
 
@@ -167,6 +168,7 @@ static void tscProcessAsyncRetrieveImpl(void *param, TAOS_RES *tres, int numOfRo
   if (pCmd->command != TSDB_SQL_RETRIEVE_LOCALMERGE && pCmd->command < TSDB_SQL_LOCAL) {
     pCmd->command = (pCmd->command > TSDB_SQL_MGMT) ? TSDB_SQL_RETRIEVE : TSDB_SQL_FETCH;
   }
+
   tscProcessSql(pSql);
 }
 
@@ -196,6 +198,10 @@ void taos_fetch_rows_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, int), voi
   SSqlRes *pRes = &pSql->res;
   SSqlCmd *pCmd = &pSql->cmd;
 
+  // user-defined callback function is stored in fetchFp
+  pSql->fetchFp = fp;
+  pSql->fp = tscAsyncFetchRowsProxy;
+
   if (pRes->qhandle == 0) {
     tscError("qhandle is NULL");
     pRes->code = TSDB_CODE_TSC_INVALID_QHANDLE;
@@ -203,10 +209,6 @@ void taos_fetch_rows_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, int), voi
     return;
   }
 
-  // user-defined callback function is stored in fetchFp
-  pSql->fetchFp = fp;
-  pSql->fp = tscAsyncFetchRowsProxy;
-
   pSql->param = param;
   tscResetForNextRetrieve(pRes);
   
@@ -346,31 +348,32 @@ void tscProcessFetchRow(SSchedMsg *pMsg) {
 
 void tscProcessAsyncRes(SSchedMsg *pMsg) {
   SSqlObj *pSql = (SSqlObj *)pMsg->ahandle;
-  SSqlCmd *pCmd = &pSql->cmd;
+//  SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
 
-  void *taosres = pSql;
+//  void *taosres = pSql;
 
   // pCmd may be released, so cache pCmd->command
-  int cmd = pCmd->command;
-  int code = pRes->code;
+//  int cmd = pCmd->command;
+//  int code = pRes->code;
 
   // in case of async insert, restore the user specified callback function
-  bool shouldFree = tscShouldBeFreed(pSql);
+//  bool shouldFree = tscShouldBeFreed(pSql);
 
-  if (cmd == TSDB_SQL_INSERT) {
-    assert(pSql->fp != NULL);
-    pSql->fp = pSql->fetchFp;
-  }
+//  if (pCmd->command == TSDB_SQL_INSERT) {
+//    assert(pSql->fp != NULL);
+  assert(pSql->fp != NULL && pSql->fetchFp != NULL);
+//  }
 
-  if (pSql->fp) {
-    (*pSql->fp)(pSql->param, taosres, code);
-  }
+//  if (pSql->fp) {
+  pSql->fp = pSql->fetchFp;
+  (*pSql->fp)(pSql->param, pSql, pRes->code);
+//  }
 
-  if (shouldFree) {
-    tscDebug("%p sqlObj is automatically freed in async res", pSql);
-    tscFreeSqlObj(pSql);
-  }
+//  if (shouldFree) {
+//    tscDebug("%p sqlObj is automatically freed in async res", pSql);
+//    tscFreeSqlObj(pSql);
+//  }
 }
 
 static void tscProcessAsyncError(SSchedMsg *pMsg) {
@@ -420,15 +423,15 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
+  pRes->code = code;
 
   if (code != TSDB_CODE_SUCCESS) {
-    pRes->code = code;
-    tscQueueAsyncRes(pSql);
-    return;
+    tscError("%p ge tableMeta failed, code:%s", pSql, tstrerror(code));
+    goto _error;
+  } else {
+    tscDebug("%p get tableMeta successfully", pSql);
   }
 
-  tscDebug("%p get tableMeta successfully", pSql);
-
   if (pSql->pStream == NULL) {
     SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
 
@@ -453,11 +456,9 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
       assert(pParObj->signature == pParObj && trs->subqueryIndex == pTableMetaInfo->vgroupIndex &&
           pTableMetaInfo->vgroupIndex >= 0 && pTableMetaInfo->vgroupList != NULL);
 
-      if ((code = tscProcessSql(pSql)) == TSDB_CODE_SUCCESS) {
-        return;
-      }
-
-      goto _error;
+      // tscProcessSql can add error into async res
+      tscProcessSql(pSql);
+      return;
     } else {  // continue to process normal async query
       if (pCmd->parseFinished) {
         tscDebug("%p update table meta in local cache, continue to process sql and send corresponding query", pSql);
@@ -477,30 +478,43 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
           tscDebug("%p redo parse sql string to build submit block", pSql);
 
           pCmd->parseFinished = false;
+          tscResetSqlCmdObj(pCmd);
+          
           code = tsParseSql(pSql, true);
 
           if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
             return;
+          } else if (code != TSDB_CODE_SUCCESS) {
+            goto _error;
           }
 
-          if (code == TSDB_CODE_SUCCESS) {
-            /*
-             * Discard previous built submit blocks, and then parse the sql string again and build up all submit blocks,
-             * and send the required submit block according to index value in supporter to server.
-             */
-            pSql->fp = pSql->fetchFp;  // restore the fp
-            if ((code = tscHandleInsertRetry(pSql)) == TSDB_CODE_SUCCESS) {
-              return;
-            }
-          }
+          /*
+           * Discard previous built submit blocks, and then parse the sql string again and build up all submit blocks,
+           * and send the required submit block according to index value in supporter to server.
+           */
+          pSql->fp = pSql->fetchFp;  // restore the fp
+          tscHandleInsertRetry(pSql);
+        } else if (pCmd->command == TSDB_SQL_SELECT) {  // in case of other query type, continue
+          tscDebug("%p redo parse sql string and proceed", pSql);
+          //tscDebug("before  %p fp:%p, fetchFp:%p", pSql, pSql->fp, pSql->fetchFp);
+          pCmd->parseFinished = false;
+          tscResetSqlCmdObj(pCmd);
 
-        } else {// in case of other query type, continue
-          if ((code = tscProcessSql(pSql)) == TSDB_CODE_SUCCESS) {
+          //tscDebug("after %p fp:%p, fetchFp:%p", pSql, pSql->fp, pSql->fetchFp);
+          code = tsParseSql(pSql, true);
+
+          if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
             return;
+          } else if (code != TSDB_CODE_SUCCESS) {
+            goto _error;
           }
+
+          tscProcessSql(pSql);
+        } else {  // in all other cases, simple retry
+          tscProcessSql(pSql);
         }
 
-        goto _error;
+        return;
       } else {
         tscDebug("%p continue parse sql after get table meta", pSql);
 
@@ -538,7 +552,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
       goto _error;
     }
 
-    if (code == TSDB_CODE_SUCCESS && UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
+    if (UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
       code = tscGetSTableVgroupInfo(pSql, pCmd->clauseIndex);
       if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
         return;
@@ -550,8 +564,8 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
     tscDebug("%p stream:%p meta is updated, start new query, command:%d", pSql, pSql->pStream, pSql->cmd.command);
     if (!pSql->cmd.parseFinished) {
       tsParseSql(pSql, false);
-      sem_post(&pSql->rspSem);
     }
+    (*pSql->fp)(pSql->param, pSql, code);
 
     return;
   }
diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
index 909338aa4a..1ec84f023a 100644
--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -330,10 +330,6 @@ int32_t getResultDataInfo(int32_t dataType, int32_t dataBytes, int32_t functionI
   return TSDB_CODE_SUCCESS;
 }
 
-bool stableQueryFunctChanged(int32_t funcId) {
-  return (aAggs[funcId].stableFuncId != funcId);
-}
-
 /**
  * the numOfRes should be kept, since it may be used later
  * and allow the ResultInfo to be re initialized
@@ -361,7 +357,6 @@ static bool function_setup(SQLFunctionCtx *pCtx) {
   }
   
   memset(pCtx->aOutputBuf, 0, (size_t)pCtx->outputBytes);
-  
   initResultInfo(pResInfo);
   return true;
 }
@@ -675,16 +670,16 @@ static void sum_func_second_merge(SQLFunctionCtx *pCtx) {
   }
 }
 
-static int32_t precal_req_load_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
+static int32_t statisRequired(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
   return BLK_DATA_STATIS_NEEDED;
 }
 
-static int32_t data_req_load_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
+static int32_t dataBlockRequired(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
   return BLK_DATA_ALL_NEEDED;
 }
 
 // todo: if  column in current data block are null, opt for this case
-static int32_t first_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
+static int32_t firstFuncRequired(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
   if (pCtx->order == TSDB_ORDER_DESC) {
     return BLK_DATA_NO_NEEDED;
   }
@@ -697,7 +692,7 @@ static int32_t first_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end,
   }
 }
 
-static int32_t last_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
+static int32_t lastFuncRequired(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
   if (pCtx->order != pCtx->param[0].i64Key) {
     return BLK_DATA_NO_NEEDED;
   }
@@ -709,34 +704,40 @@ static int32_t last_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end,
   }
 }
 
-static int32_t first_dist_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
+static int32_t firstDistFuncRequired(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
   if (pCtx->order == TSDB_ORDER_DESC) {
     return BLK_DATA_NO_NEEDED;
   }
+
+  // not initialized yet, it is the first block, load it.
+  if (pCtx->aOutputBuf == NULL) {
+    return BLK_DATA_ALL_NEEDED;
+  }
   
-  // result buffer has not been set yet.
-  return BLK_DATA_ALL_NEEDED;
-  //todo optimize the filter info
-//  SFirstLastInfo *pInfo = (SFirstLastInfo*) (pCtx->aOutputBuf + pCtx->inputBytes);
-//  if (pInfo->hasResult != DATA_SET_FLAG) {
-//    return BLK_DATA_ALL_NEEDED;
-//  } else {  // data in current block is not earlier than current result
-//    return (pInfo->ts <= start) ? BLK_DATA_NO_NEEDED : BLK_DATA_ALL_NEEDED;
-//  }
+  SFirstLastInfo *pInfo = (SFirstLastInfo*) (pCtx->aOutputBuf + pCtx->inputBytes);
+  if (pInfo->hasResult != DATA_SET_FLAG) {
+    return BLK_DATA_ALL_NEEDED;
+  } else {  // data in current block is not earlier than current result
+    return (pInfo->ts <= start) ? BLK_DATA_NO_NEEDED : BLK_DATA_ALL_NEEDED;
+  }
 }
 
-static int32_t last_dist_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
+static int32_t lastDistFuncRequired(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
   if (pCtx->order != pCtx->param[0].i64Key) {
     return BLK_DATA_NO_NEEDED;
   }
-  
-  return BLK_DATA_ALL_NEEDED;
-//  SFirstLastInfo *pInfo = (SFirstLastInfo*) (pCtx->aOutputBuf + pCtx->inputBytes);
-//  if (pInfo->hasResult != DATA_SET_FLAG) {
-//    return BLK_DATA_ALL_NEEDED;
-//  } else {
-//    return (pInfo->ts > end) ? BLK_DATA_NO_NEEDED : BLK_DATA_ALL_NEEDED;
-//  }
+
+  // not initialized yet, it is the first block, load it.
+  if (pCtx->aOutputBuf == NULL) {
+    return BLK_DATA_ALL_NEEDED;
+  }
+
+  SFirstLastInfo *pInfo = (SFirstLastInfo*) (pCtx->aOutputBuf + pCtx->inputBytes);
+  if (pInfo->hasResult != DATA_SET_FLAG) {
+    return BLK_DATA_ALL_NEEDED;
+  } else {
+    return (pInfo->ts > end) ? BLK_DATA_NO_NEEDED : BLK_DATA_ALL_NEEDED;
+  }
 }
 
 //////////////////////////////////////////////////////////////////////////////////////////////
@@ -1549,6 +1550,8 @@ static void first_data_assign_impl(SQLFunctionCtx *pCtx, char *pData, int32_t in
  * to decide if the value is earlier than current intermediate result
  */
 static void first_dist_function(SQLFunctionCtx *pCtx) {
+  assert(pCtx->size > 0);
+
   if (pCtx->size == 0) {
     return;
   }
@@ -1563,7 +1566,12 @@ static void first_dist_function(SQLFunctionCtx *pCtx) {
   }
   
   int32_t notNullElems = 0;
-  
+
+  // data block is discard, not loaded, do not need to check it
+  if (!pCtx->preAggVals.dataBlockLoaded) {
+    return;
+  }
+
   // find the first not null value
   for (int32_t i = 0; i < pCtx->size; ++i) {
     char *data = GET_INPUT_CHAR_INDEX(pCtx, i);
@@ -1584,10 +1592,6 @@ static void first_dist_function(SQLFunctionCtx *pCtx) {
 }
 
 static void first_dist_function_f(SQLFunctionCtx *pCtx, int32_t index) {
-  if (pCtx->size == 0) {
-    return;
-  }
-  
   char *pData = GET_INPUT_CHAR_INDEX(pCtx, index);
   if (pCtx->hasNull && isNull(pData, pCtx->inputType)) {
     return;
@@ -1715,10 +1719,6 @@ static void last_data_assign_impl(SQLFunctionCtx *pCtx, char *pData, int32_t ind
 }
 
 static void last_dist_function(SQLFunctionCtx *pCtx) {
-  if (pCtx->size == 0) {
-    return;
-  }
-  
   /*
    * 1. for scan data in asc order, no need to check data
    * 2. for data blocks that are not loaded, no need to check data
@@ -1726,7 +1726,12 @@ static void last_dist_function(SQLFunctionCtx *pCtx) {
   if (pCtx->order != pCtx->param[0].i64Key) {
     return;
   }
-  
+
+  // data block is discard, not loaded, do not need to check it
+  if (!pCtx->preAggVals.dataBlockLoaded) {
+    return;
+  }
+
   int32_t notNullElems = 0;
   
   for (int32_t i = pCtx->size - 1; i >= 0; --i) {
@@ -2123,55 +2128,6 @@ static void copyTopBotRes(SQLFunctionCtx *pCtx, int32_t type) {
   tfree(pData);
 }
 
-bool top_bot_datablock_filter(SQLFunctionCtx *pCtx, int32_t functionId, char *minval, char *maxval) {
-  STopBotInfo *pTopBotInfo = (STopBotInfo *)GET_RES_INFO(pCtx)->interResultBuf;
-  
-  int32_t numOfExistsRes = pTopBotInfo->num;
-  
-  // required number of results are not reached, continue load data block
-  if (numOfExistsRes < pCtx->param[0].i64Key) {
-    return true;
-  }
-  
-  tValuePair *pRes = (tValuePair*) pTopBotInfo->res;
-  
-  if (functionId == TSDB_FUNC_TOP) {
-    switch (pCtx->inputType) {
-      case TSDB_DATA_TYPE_TINYINT:
-        return GET_INT8_VAL(maxval) > pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_SMALLINT:
-        return GET_INT16_VAL(maxval) > pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_INT:
-        return GET_INT32_VAL(maxval) > pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_BIGINT:
-        return GET_INT64_VAL(maxval) > pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_FLOAT:
-        return GET_FLOAT_VAL(maxval) > pRes[0].v.dKey;
-      case TSDB_DATA_TYPE_DOUBLE:
-        return GET_DOUBLE_VAL(maxval) > pRes[0].v.dKey;
-      default:
-        return true;
-    }
-  } else {
-    switch (pCtx->inputType) {
-      case TSDB_DATA_TYPE_TINYINT:
-        return GET_INT8_VAL(minval) < pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_SMALLINT:
-        return GET_INT16_VAL(minval) < pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_INT:
-        return GET_INT32_VAL(minval) < pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_BIGINT:
-        return GET_INT64_VAL(minval) < pRes[0].v.i64Key;
-      case TSDB_DATA_TYPE_FLOAT:
-        return GET_FLOAT_VAL(minval) < pRes[0].v.dKey;
-      case TSDB_DATA_TYPE_DOUBLE:
-        return GET_DOUBLE_VAL(minval) < pRes[0].v.dKey;
-      default:
-        return true;
-    }
-  }
-}
-
 /*
  * Parameters values:
  * 1. param[0]: maximum allowable results
@@ -2182,15 +2138,62 @@ bool top_bot_datablock_filter(SQLFunctionCtx *pCtx, int32_t functionId, char *mi
  */
 static STopBotInfo *getTopBotOutputInfo(SQLFunctionCtx *pCtx) {
   SResultInfo *pResInfo = GET_RES_INFO(pCtx);
-  
+
   // only the first_stage_merge is directly written data into final output buffer
   if (pResInfo->superTableQ && pCtx->currentStage != SECONDARY_STAGE_MERGE) {
     return (STopBotInfo*) pCtx->aOutputBuf;
-  } else {  // during normal table query and super table at the secondary_stage, result is written to intermediate buffer
+  } else { // during normal table query and super table at the secondary_stage, result is written to intermediate buffer
     return pResInfo->interResultBuf;
   }
 }
 
+bool topbot_datablock_filter(SQLFunctionCtx *pCtx, int32_t functionId, const char *minval, const char *maxval) {
+  STopBotInfo *pTopBotInfo = getTopBotOutputInfo(pCtx);
+  
+  // required number of results are not reached, continue load data block
+  if (pTopBotInfo->num < pCtx->param[0].i64Key) {
+    return true;
+  }
+  
+  tValuePair **pRes = (tValuePair**) pTopBotInfo->res;
+  
+  if (functionId == TSDB_FUNC_TOP) {
+    switch (pCtx->inputType) {
+      case TSDB_DATA_TYPE_TINYINT:
+        return GET_INT8_VAL(maxval) > pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_SMALLINT:
+        return GET_INT16_VAL(maxval) > pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_INT:
+        return GET_INT32_VAL(maxval) > pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_BIGINT:
+        return GET_INT64_VAL(maxval) > pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_FLOAT:
+        return GET_FLOAT_VAL(maxval) > pRes[0]->v.dKey;
+      case TSDB_DATA_TYPE_DOUBLE:
+        return GET_DOUBLE_VAL(maxval) > pRes[0]->v.dKey;
+      default:
+        return true;
+    }
+  } else {
+    switch (pCtx->inputType) {
+      case TSDB_DATA_TYPE_TINYINT:
+        return GET_INT8_VAL(minval) < pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_SMALLINT:
+        return GET_INT16_VAL(minval) < pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_INT:
+        return GET_INT32_VAL(minval) < pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_BIGINT:
+        return GET_INT64_VAL(minval) < pRes[0]->v.i64Key;
+      case TSDB_DATA_TYPE_FLOAT:
+        return GET_FLOAT_VAL(minval) < pRes[0]->v.dKey;
+      case TSDB_DATA_TYPE_DOUBLE:
+        return GET_DOUBLE_VAL(minval) < pRes[0]->v.dKey;
+      default:
+        return true;
+    }
+  }
+}
+
 /*
  * keep the intermediate results during scan data blocks in the format of:
  * +-----------------------------------+-------------one value pair-----------+------------next value pair-----------+
@@ -2952,10 +2955,14 @@ static void tag_project_function(SQLFunctionCtx *pCtx) {
   INC_INIT_VAL(pCtx, pCtx->size);
   
   assert(pCtx->inputBytes == pCtx->outputBytes);
-  
-  for (int32_t i = 0; i < pCtx->size; ++i) {
-    tVariantDump(&pCtx->tag, pCtx->aOutputBuf, pCtx->outputType, true);
-    
+
+  tVariantDump(&pCtx->tag, pCtx->aOutputBuf, pCtx->outputType, true);
+  char* data = pCtx->aOutputBuf;
+  pCtx->aOutputBuf += pCtx->outputBytes;
+
+  // directly copy from the first one
+  for (int32_t i = 1; i < pCtx->size; ++i) {
+    memmove(pCtx->aOutputBuf, data, pCtx->outputBytes);
     pCtx->aOutputBuf += pCtx->outputBytes;
   }
 }
@@ -3372,7 +3379,7 @@ static void spread_function(SQLFunctionCtx *pCtx) {
   SResultInfo *pResInfo = GET_RES_INFO(pCtx);
   SSpreadInfo *pInfo = pResInfo->interResultBuf;
   
-  int32_t numOfElems = pCtx->size;
+  int32_t numOfElems = 0;
   
   // todo : opt with pre-calculated result
   // column missing cause the hasNull to be true
@@ -3941,7 +3948,7 @@ static void ts_comp_finalize(SQLFunctionCtx *pCtx) {
   tsBufFlush(pTSbuf);
   strcpy(pCtx->aOutputBuf, pTSbuf->path);
   
-  tsBufDestory(pTSbuf);
+  tsBufDestroy(pTSbuf);
   doFinalizer(pCtx);
 }
 
@@ -4408,7 +4415,7 @@ static void sumrate_finalizer(SQLFunctionCtx *pCtx) {
  *    e.g., count/sum/avg/min/max/stddev/percentile/apercentile/first/last...
  *
  */
-int32_t funcCompatDefList[] = {
+int32_t functionCompatList[] = {
     // count,       sum,      avg,       min,      max,  stddev,    percentile, apercentile, first,   last
     1,          1,        1,         1,        1,      1,          1,           1,        1,      1,
     // last_row,    top,    bottom,     spread,    twa,  leastsqr,     ts,       ts_dummy, tag_dummy, ts_z
@@ -4447,7 +4454,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               sum_func_merge,
                               sum_func_second_merge,
-                              precal_req_load_info,
+                              statisRequired,
                           },
                           {
                               // 2
@@ -4462,7 +4469,7 @@ SQLAggFuncElem aAggs[] = {{
                               avg_finalizer,
                               avg_func_merge,
                               avg_func_second_merge,
-                              precal_req_load_info,
+                              statisRequired,
                           },
                           {
                               // 3
@@ -4477,7 +4484,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               min_func_merge,
                               min_func_second_merge,
-                              precal_req_load_info,
+                              statisRequired,
                           },
                           {
                               // 4
@@ -4492,7 +4499,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               max_func_merge,
                               max_func_second_merge,
-                              precal_req_load_info,
+                              statisRequired,
                           },
                           {
                               // 5
@@ -4507,7 +4514,7 @@ SQLAggFuncElem aAggs[] = {{
                               stddev_finalizer,
                               noop1,
                               noop1,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 6
@@ -4522,7 +4529,7 @@ SQLAggFuncElem aAggs[] = {{
                               percentile_finalizer,
                               noop1,
                               noop1,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 7
@@ -4537,7 +4544,7 @@ SQLAggFuncElem aAggs[] = {{
                               apercentile_finalizer,
                               apercentile_func_merge,
                               apercentile_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 8
@@ -4552,7 +4559,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               noop1,
                               noop1,
-                              first_data_req_info,
+                              firstFuncRequired,
                           },
                           {
                               // 9
@@ -4567,7 +4574,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               noop1,
                               noop1,
-                              last_data_req_info,
+                              lastFuncRequired,
                           },
                           {
                               // 10
@@ -4583,7 +4590,7 @@ SQLAggFuncElem aAggs[] = {{
                               last_row_finalizer,
                               noop1,
                               last_dist_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 11
@@ -4599,7 +4606,7 @@ SQLAggFuncElem aAggs[] = {{
                               top_bottom_func_finalizer,
                               top_func_merge,
                               top_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 12
@@ -4615,7 +4622,7 @@ SQLAggFuncElem aAggs[] = {{
                               top_bottom_func_finalizer,
                               bottom_func_merge,
                               bottom_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 13
@@ -4645,7 +4652,7 @@ SQLAggFuncElem aAggs[] = {{
                               twa_function_finalizer,
                               twa_func_merge,
                               twa_function_copy,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 15
@@ -4660,7 +4667,7 @@ SQLAggFuncElem aAggs[] = {{
                               leastsquares_finalizer,
                               noop1,
                               noop1,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 16
@@ -4690,7 +4697,7 @@ SQLAggFuncElem aAggs[] = {{
                               doFinalizer,
                               copy_function,
                               copy_function,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 18
@@ -4720,7 +4727,7 @@ SQLAggFuncElem aAggs[] = {{
                               ts_comp_finalize,
                               copy_function,
                               copy_function,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 20
@@ -4750,7 +4757,7 @@ SQLAggFuncElem aAggs[] = {{
                               doFinalizer,
                               copy_function,
                               copy_function,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 22, multi-output, tag function has only one result
@@ -4780,7 +4787,7 @@ SQLAggFuncElem aAggs[] = {{
                               doFinalizer,
                               copy_function,
                               copy_function,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 24
@@ -4795,7 +4802,7 @@ SQLAggFuncElem aAggs[] = {{
                               doFinalizer,
                               noop1,
                               noop1,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
     // distributed version used in two-stage aggregation processes
                           {
@@ -4811,7 +4818,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               first_dist_func_merge,
                               first_dist_func_second_merge,
-                              first_dist_data_req_info,
+                              firstDistFuncRequired,
                           },
                           {
                               // 26
@@ -4826,7 +4833,7 @@ SQLAggFuncElem aAggs[] = {{
                               function_finalizer,
                               last_dist_func_merge,
                               last_dist_func_second_merge,
-                              last_dist_data_req_info,
+                              lastDistFuncRequired,
                           },
                           {
                               // 27
@@ -4841,7 +4848,7 @@ SQLAggFuncElem aAggs[] = {{
                               doFinalizer,
                               noop1,
                               copy_function,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 28
@@ -4856,7 +4863,7 @@ SQLAggFuncElem aAggs[] = {{
                               rate_finalizer,
                               rate_func_merge,
                               rate_func_copy,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 29
@@ -4871,7 +4878,7 @@ SQLAggFuncElem aAggs[] = {{
                               rate_finalizer,
                               rate_func_merge,
                               rate_func_copy,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 30
@@ -4886,7 +4893,7 @@ SQLAggFuncElem aAggs[] = {{
                               sumrate_finalizer,
                               sumrate_func_merge,
                               sumrate_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 31
@@ -4901,7 +4908,7 @@ SQLAggFuncElem aAggs[] = {{
                               sumrate_finalizer,
                               sumrate_func_merge,
                               sumrate_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 32
@@ -4916,7 +4923,7 @@ SQLAggFuncElem aAggs[] = {{
                               sumrate_finalizer,
                               sumrate_func_merge,
                               sumrate_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 33
@@ -4931,7 +4938,7 @@ SQLAggFuncElem aAggs[] = {{
                               sumrate_finalizer,
                               sumrate_func_merge,
                               sumrate_func_second_merge,
-                              data_req_load_info,
+                              dataBlockRequired,
                           },
                           {
                               // 34
@@ -4946,5 +4953,5 @@ SQLAggFuncElem aAggs[] = {{
                               noop1,
                               noop1,
                               noop1,
-                              data_req_load_info,
+                              dataBlockRequired,
                           }};
diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index 9f0d1a26ab..0cf69dfd46 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -497,7 +497,7 @@ TAOS_STMT* taos_stmt_init(TAOS* taos) {
   tsem_init(&pSql->rspSem, 0, 0);
   pSql->signature     = pSql;
   pSql->pTscObj       = pObj;
-  pSql->maxRetry      = TSDB_MAX_REPLICA_NUM;
+  pSql->maxRetry      = TSDB_MAX_REPLICA;
 
   pStmt->pSql = pSql;
   return pStmt;
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 65e2c976e0..f76a1341d2 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -175,7 +175,6 @@ static int32_t handlePassword(SSqlCmd* pCmd, SSQLToken* pPwd) {
   return TSDB_CODE_SUCCESS;
 }
 
-// todo handle memory leak in error handle function
 int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   if (pInfo == NULL || pSql == NULL || pSql->signature != pSql) {
     return TSDB_CODE_TSC_APP_ERROR;
@@ -2472,7 +2471,7 @@ static bool functionCompatibleCheck(SQueryInfo* pQueryInfo) {
     startIdx++;
   }
 
-  int32_t factor = funcCompatDefList[tscSqlExprGet(pQueryInfo, startIdx)->functionId];
+  int32_t factor = functionCompatList[tscSqlExprGet(pQueryInfo, startIdx)->functionId];
 
   // diff function cannot be executed with other function
   // arithmetic function can be executed with other arithmetic functions
@@ -2490,7 +2489,7 @@ static bool functionCompatibleCheck(SQueryInfo* pQueryInfo) {
       continue;
     }
 
-    if (funcCompatDefList[functionId] != factor) {
+    if (functionCompatList[functionId] != factor) {
       return false;
     }
   }
@@ -4643,21 +4642,24 @@ typedef struct SDNodeDynConfOption {
 } SDNodeDynConfOption;
 
 
-int32_t validateEp(char* ep) {
+int32_t validateEp(char* ep) {  
   char buf[TSDB_EP_LEN + 1] = {0};
   tstrncpy(buf, ep, TSDB_EP_LEN);
 
-  char *pos = strchr(buf, ':');
-  if (NULL == pos) {   
-    return TSDB_CODE_TSC_INVALID_SQL;
+  char* pos = strchr(buf, ':');
+  if (NULL == pos) {
+    int32_t val = strtol(ep, NULL, 10);
+    if (val <= 0 || val > 65536) {
+      return TSDB_CODE_TSC_INVALID_SQL;
+    }
+  } else {
+    uint16_t port = atoi(pos + 1);
+    if (0 == port) {
+      return TSDB_CODE_TSC_INVALID_SQL;
+    }
   }
-  
-  uint16_t port = atoi(pos+1);
-  if (0 == port) {   
-    return TSDB_CODE_TSC_INVALID_SQL;
-  }  
 
-  return TSDB_CODE_SUCCESS;   
+  return TSDB_CODE_SUCCESS;
 }
 
 int32_t validateDNodeConfig(tDCLSQL* pOptions) {
@@ -4665,13 +4667,13 @@ int32_t validateDNodeConfig(tDCLSQL* pOptions) {
     return TSDB_CODE_TSC_INVALID_SQL;
   }
 
-  const int DNODE_DYNAMIC_CFG_OPTIONS_SIZE = 17;
+  const int DNODE_DYNAMIC_CFG_OPTIONS_SIZE = 19;
   const SDNodeDynConfOption DNODE_DYNAMIC_CFG_OPTIONS[] = {
       {"resetLog", 8},       {"resetQueryCache", 15},  {"debugFlag", 9},     {"mDebugFlag", 10},
       {"dDebugFlag", 10},    {"sdbDebugFlag", 12},     {"vDebugFlag", 10},   {"cDebugFlag", 10},
       {"httpDebugFlag", 13}, {"monitorDebugFlag", 16}, {"rpcDebugFlag", 12}, {"uDebugFlag", 10},
       {"tmrDebugFlag", 12},  {"qDebugflag", 10},       {"sDebugflag", 10},   {"tsdbDebugFlag", 13},
-      {"monitor", 7}};
+      {"mqttDebugFlag", 13}, {"wDebugFlag", 10},       {"monitor", 7}};
 
   SSQLToken* pOptionToken = &pOptions->a[1];
 
@@ -4695,7 +4697,7 @@ int32_t validateDNodeConfig(tDCLSQL* pOptions) {
     SSQLToken* pValToken = &pOptions->a[2];
 
     int32_t val = strtol(pValToken->z, NULL, 10);
-    if (val < 131 || val > 199) {
+    if (val < 0 || val > 256) {
       /* options value is out of valid range */
       return TSDB_CODE_TSC_INVALID_SQL;
     }
@@ -4963,6 +4965,7 @@ static void setCreateDBOption(SCMCreateDbMsg* pMsg, SCreateDBInfo* pCreateDb) {
   pMsg->commitTime = htonl(pCreateDb->commitTime);
   pMsg->minRowsPerFileBlock = htonl(pCreateDb->minRowsPerBlock);
   pMsg->maxRowsPerFileBlock = htonl(pCreateDb->maxRowsPerBlock);
+  pMsg->fsyncPeriod = htonl(pCreateDb->fsyncPeriod);
   pMsg->compression = pCreateDb->compressionLevel;
   pMsg->walLevel = (char)pCreateDb->walLevel;
   pMsg->replications = pCreateDb->replica;
@@ -5490,9 +5493,9 @@ int32_t tscCheckCreateDbParams(SSqlCmd* pCmd, SCMCreateDbMsg* pCreate) {
   }
 
   if (pCreate->replications != -1 &&
-      (pCreate->replications < TSDB_MIN_REPLICA_NUM || pCreate->replications > TSDB_MAX_REPLICA_NUM)) {
+      (pCreate->replications < TSDB_MIN_DB_REPLICA_OPTION || pCreate->replications > TSDB_MAX_DB_REPLICA_OPTION)) {
     snprintf(msg, tListLen(msg), "invalid db option replications: %d valid range: [%d, %d]", pCreate->replications,
-             TSDB_MIN_REPLICA_NUM, TSDB_MAX_REPLICA_NUM);
+             TSDB_MIN_DB_REPLICA_OPTION, TSDB_MAX_DB_REPLICA_OPTION);
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg);
   }
 
@@ -5530,6 +5533,13 @@ int32_t tscCheckCreateDbParams(SSqlCmd* pCmd, SCMCreateDbMsg* pCreate) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg);
   }
 
+  val = htonl(pCreate->fsyncPeriod);
+  if (val != -1 && (val < TSDB_MIN_FSYNC_PERIOD || val > TSDB_MAX_FSYNC_PERIOD)) {
+    snprintf(msg, tListLen(msg), "invalid db option fsyncPeriod: %d valid range: [%d, %d]", val,
+             TSDB_MIN_FSYNC_PERIOD, TSDB_MAX_FSYNC_PERIOD);
+    return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg);
+  }
+
   if (pCreate->compression != -1 &&
       (pCreate->compression < TSDB_MIN_COMP_LEVEL || pCreate->compression > TSDB_MAX_COMP_LEVEL)) {
     snprintf(msg, tListLen(msg), "invalid db option compression: %d valid range: [%d, %d]", pCreate->compression,
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 88fcc3828e..d8af6d5c87 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -246,43 +246,52 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet) {
     rpcMsg->code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
   } else {
     STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
-    if (rpcMsg->code == TSDB_CODE_TDB_INVALID_TABLE_ID || rpcMsg->code == TSDB_CODE_VND_INVALID_VGROUP_ID || 
-        rpcMsg->code == TSDB_CODE_RPC_NETWORK_UNAVAIL || rpcMsg->code == TSDB_CODE_TDB_TABLE_RECONFIGURE) {
-      if (pCmd->command == TSDB_SQL_CONNECT) {
-        rpcMsg->code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
-        rpcFreeCont(rpcMsg->pCont);
-        return;
-      } else if (pCmd->command == TSDB_SQL_HB) {
-        rpcMsg->code = TSDB_CODE_RPC_NOT_READY;
-        rpcFreeCont(rpcMsg->pCont);
-        return;
-      } else if (pCmd->command == TSDB_SQL_META) {
-        // get table meta query will not retry, do nothing
+    // if (rpcMsg->code != TSDB_CODE_RPC_NETWORK_UNAVAIL) {
+    //   if (pCmd->command == TSDB_SQL_CONNECT) {
+    //     rpcMsg->code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
+    //     rpcFreeCont(rpcMsg->pCont);
+    //     return;
+    //   }
+
+    //   if (pCmd->command == TSDB_SQL_HB) {
+    //     rpcMsg->code = TSDB_CODE_RPC_NOT_READY;
+    //     rpcFreeCont(rpcMsg->pCont);
+    //     return;
+    //   }
+
+    //   if (pCmd->command == TSDB_SQL_META || pCmd->command == TSDB_SQL_DESCRIBE_TABLE ||
+    //       pCmd->command == TSDB_SQL_STABLEVGROUP || pCmd->command == TSDB_SQL_SHOW ||
+    //       pCmd->command == TSDB_SQL_RETRIEVE) {
+    //     // get table meta/vgroup query will not retry, do nothing
+    //   }
+    // }
+
+    if ((pCmd->command == TSDB_SQL_SELECT || pCmd->command == TSDB_SQL_FETCH || pCmd->command == TSDB_SQL_INSERT ||
+         pCmd->command == TSDB_SQL_UPDATE_TAGS_VAL) &&
+        (rpcMsg->code == TSDB_CODE_TDB_INVALID_TABLE_ID || rpcMsg->code == TSDB_CODE_VND_INVALID_VGROUP_ID ||
+         rpcMsg->code == TSDB_CODE_RPC_NETWORK_UNAVAIL || rpcMsg->code == TSDB_CODE_TDB_TABLE_RECONFIGURE)) {
+      tscWarn("%p it shall renew table meta, code:%s, retry:%d", pSql, tstrerror(rpcMsg->code), ++pSql->retry);
+      // set the flag to denote that sql string needs to be re-parsed and build submit block with table schema
+      if (rpcMsg->code == TSDB_CODE_TDB_TABLE_RECONFIGURE) {
+        pSql->cmd.submitSchema = 1;
+      }
+
+      pSql->res.code = rpcMsg->code;  // keep the previous error code
+      if (pSql->retry > pSql->maxRetry) {
+        tscError("%p max retry %d reached, give up", pSql, pSql->maxRetry);
       } else {
-        tscWarn("%p it shall renew table meta, code:%s, retry:%d", pSql, tstrerror(rpcMsg->code), ++pSql->retry);
+        rpcMsg->code = tscRenewTableMeta(pSql, pTableMetaInfo->name);
 
-        // set the flag to denote that sql string needs to be re-parsed and build submit block with table schema
-        if (rpcMsg->code == TSDB_CODE_TDB_TABLE_RECONFIGURE) {
-          pSql->cmd.submitSchema = 1;
-        }
-
-        pSql->res.code = rpcMsg->code;  // keep the previous error code
-        if (pSql->retry > pSql->maxRetry) {
-          tscError("%p max retry %d reached, give up", pSql, pSql->maxRetry);
-        } else {
-          rpcMsg->code = tscRenewTableMeta(pSql, pTableMetaInfo->name);
-
-          // if there is an error occurring, proceed to the following error handling procedure.
-          // todo add test cases
-          if (rpcMsg->code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
-            rpcFreeCont(rpcMsg->pCont);
-            return;
-          }
+        // if there is an error occurring, proceed to the following error handling procedure.
+        // todo add test cases
+        if (rpcMsg->code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+          rpcFreeCont(rpcMsg->pCont);
+          return;
         }
       }
     }
   }
-  
+
   pRes->rspLen = 0;
   
   if (pRes->code != TSDB_CODE_TSC_QUERY_CANCELLED) {
@@ -339,7 +348,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet) {
   }
 
   if (rpcMsg->code != TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
-    rpcMsg->code = (pRes->code == TSDB_CODE_SUCCESS) ? pRes->numOfRows: pRes->code;
+    rpcMsg->code = (pRes->code == TSDB_CODE_SUCCESS)? pRes->numOfRows: pRes->code;
     
     bool shouldFree = tscShouldBeFreed(pSql);
     (*pSql->fp)(pSql->param, pSql, rpcMsg->code);
@@ -412,7 +421,7 @@ int tscProcessSql(SSqlObj *pSql) {
       return pSql->res.code;
     }
   } else if (pCmd->command < TSDB_SQL_LOCAL) {
-    pSql->ipList = tscMgmtIpSet; //?
+    pSql->ipList = tscMgmtIpSet;
   } else {  // local handler
     return (*tscProcessMsgRsp[pCmd->command])(pSql);
   }
@@ -476,6 +485,8 @@ int tscBuildFetchMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     int32_t vgIndex = pTableMetaInfo->vgroupIndex;
     
     SVgroupsInfo* pVgroupInfo = pTableMetaInfo->vgroupList;
+    assert(pVgroupInfo->vgroups[vgIndex].vgId > 0 && vgIndex < pTableMetaInfo->vgroupList->numOfVgroups);
+
     pRetrieveMsg->header.vgId = htonl(pVgroupInfo->vgroups[vgIndex].vgId);
   } else {
     STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
@@ -549,6 +560,7 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
       assert(index >= 0);
   
       if (pTableMetaInfo->vgroupList->numOfVgroups > 0) {
+        assert(index < pTableMetaInfo->vgroupList->numOfVgroups);
         pVgroupInfo = &pTableMetaInfo->vgroupList->vgroups[index];
       }
       tscDebug("%p query on stable, vgIndex:%d, numOfVgroups:%d", pSql, index, pTableMetaInfo->vgroupList->numOfVgroups);
@@ -1372,7 +1384,6 @@ static int tscLocalResultCommonBuilder(SSqlObj *pSql, int32_t numOfRes) {
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
 
   pRes->code = TSDB_CODE_SUCCESS;
-
   if (pRes->rspType == 0) {
     pRes->numOfRows = numOfRes;
     pRes->row = 0;
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index f9f93b3f89..0677463d8d 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -113,7 +113,7 @@ SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
 
   pSql->pTscObj = pObj;
   pSql->signature = pSql;
-  pSql->maxRetry = TSDB_MAX_REPLICA_NUM;
+  pSql->maxRetry = TSDB_MAX_REPLICA;
   tsem_init(&pSql->rspSem, 0, 0);
   
   pObj->pDnodeConn = pDnodeConn;
@@ -181,6 +181,19 @@ TAOS *taos_connect(const char *ip, const char *user, const char *pass, const cha
 
   return NULL;
 }
+TAOS *taos_connect_c(const char *ip, uint8_t ipLen, const char *user, uint8_t userLen, 
+    const char *pass, uint8_t passLen, const char *db, uint8_t dbLen, uint16_t port) {
+    char ipBuf[TSDB_EP_LEN] = {0};
+    char userBuf[TSDB_USER_LEN] = {0};
+    char passBuf[TSDB_PASSWORD_LEN] = {0};
+    char dbBuf[TSDB_DB_NAME_LEN] = {0};
+    strncpy(ipBuf,   ip,   MIN(TSDB_EP_LEN - 1,     ipLen)); 
+    strncpy(userBuf, user, MIN(TSDB_USER_LEN - 1,    userLen)); 
+    strncpy(passBuf, pass, MIN(TSDB_PASSWORD_LEN - 1,passLen)); 
+    strncpy(dbBuf,   db,   MIN(TSDB_DB_NAME_LEN - 1, dbLen)); 
+    return taos_connect(ipBuf, userBuf, passBuf, dbBuf, port);  
+}
+
 
 TAOS *taos_connect_a(char *ip, char *user, char *pass, char *db, uint16_t port, void (*fp)(void *, TAOS_RES *, int),
                      void *param, void **taos) {
@@ -249,7 +262,31 @@ TAOS_RES* taos_query(TAOS *taos, const char *sqlstr) {
   tsem_wait(&pSql->rspSem);
   return pSql;
 }
+TAOS_RES* taos_query_c(TAOS *taos, const char *sqlstr, uint32_t sqlLen) {
+  STscObj *pObj = (STscObj *)taos;
+  if (pObj == NULL || pObj->signature != pObj) {
+    terrno = TSDB_CODE_TSC_DISCONNECTED;
+    return NULL;
+  }
+  
+  if (sqlLen > tsMaxSQLStringLen) {
+    tscError("sql string exceeds max length:%d", tsMaxSQLStringLen);
+    terrno = TSDB_CODE_TSC_INVALID_SQL;
+    return NULL;
+  }
+  
+  SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
+  if (pSql == NULL) {
+    tscError("failed to malloc sqlObj");
+    terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
+    return NULL;
+  }
+  
+  doAsyncQuery(pObj, pSql, waitForQueryRsp, taos, sqlstr, sqlLen);
 
+  tsem_wait(&pSql->rspSem);
+  return pSql; 
+}
 int taos_result_precision(TAOS_RES *res) {
   SSqlObj *pSql = (SSqlObj *)res;
   if (pSql == NULL || pSql->signature != pSql) return 0;
@@ -403,7 +440,7 @@ TAOS_ROW taos_fetch_row(TAOS_RES *res) {
     taos_fetch_rows_a(res, waitForRetrieveRsp, pSql->pTscObj);
     sem_wait(&pSql->rspSem);
   }
-  
+
   return doSetResultRowData(pSql, true);
 }
 
@@ -481,25 +518,14 @@ static bool tscFreeQhandleInVnode(SSqlObj* pSql) {
 
   if (pRes->code == TSDB_CODE_SUCCESS && pRes->completed == false && !tscIsTwoStageSTableQuery(pQueryInfo, 0) &&
       (pCmd->command == TSDB_SQL_SELECT ||
-          pCmd->command == TSDB_SQL_SHOW ||
-          pCmd->command == TSDB_SQL_RETRIEVE ||
-          pCmd->command == TSDB_SQL_FETCH) &&
-      (pCmd->command == TSDB_SQL_SELECT && pSql->pStream == NULL && pTableMetaInfo->pTableMeta != NULL)) {
+       pCmd->command == TSDB_SQL_SHOW ||
+       pCmd->command == TSDB_SQL_RETRIEVE ||
+       pCmd->command == TSDB_SQL_FETCH) &&
+      (pSql->pStream == NULL && pTableMetaInfo->pTableMeta != NULL)) {
 
     pCmd->command = (pCmd->command > TSDB_SQL_MGMT) ? TSDB_SQL_RETRIEVE : TSDB_SQL_FETCH;
-    tscDebug("%p send msg to dnode to free qhandle ASAP, command:%s", pSql, sqlCmd[pCmd->command]);
+    tscDebug("%p send msg to dnode to free qhandle ASAP, command:%s, ", pSql, sqlCmd[pCmd->command]);
     tscProcessSql(pSql);
-
-    // in case of sync model query, waits for response and then goes on
-//    if (pSql->fp == waitForQueryRsp || pSql->fp == waitForRetrieveRsp) {
-//      sem_wait(&pSql->rspSem);
-
-//      tscFreeSqlObj(pSql);
-//      tscDebug("%p sqlObj is freed by app", pSql);
-//    } else {
-      tscDebug("%p sqlObj will be freed while rsp received", pSql);
-//    }
-
     return true;
   }
 
diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index 6cc27a4cfe..7c188ec969 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -70,6 +70,7 @@ static void tscProcessStreamLaunchQuery(SSchedMsg *pMsg) {
   SSqlObj *   pSql = pStream->pSql;
 
   pSql->fp = tscProcessStreamQueryCallback;
+  pSql->fetchFp = tscProcessStreamQueryCallback;
   pSql->param = pStream;
   pSql->res.completed = false;
   
@@ -471,6 +472,41 @@ static void setErrorInfo(SSqlObj* pSql, int32_t code, char* info) {
   }
 }
 
+static void tscCreateStream(void *param, TAOS_RES *res, int code) {
+  SSqlStream* pStream = (SSqlStream*)param;
+  SSqlObj* pSql = pStream->pSql;
+  SSqlCmd* pCmd = &pSql->cmd;
+
+  if (code != TSDB_CODE_SUCCESS) {
+    setErrorInfo(pSql, code, pCmd->payload);
+    tscError("%p open stream failed, sql:%s, reason:%s, code:0x%08x", pSql, pSql->sqlstr, pCmd->payload, code);
+    pStream->fp(pStream->param, NULL, NULL);
+    return;
+  }
+
+  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
+  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+  STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);
+  
+  pStream->isProject = isProjectStream(pQueryInfo);
+  pStream->precision = tinfo.precision;
+
+  pStream->ctime = taosGetTimestamp(pStream->precision);
+  pStream->etime = pQueryInfo->window.ekey;
+
+  tscAddIntoStreamList(pStream);
+
+  tscSetSlidingWindowInfo(pSql, pStream);
+  pStream->stime = tscGetStreamStartTimestamp(pSql, pStream, pStream->stime);
+
+  int64_t starttime = tscGetLaunchTimestamp(pStream);
+  pCmd->command = TSDB_SQL_SELECT;
+  taosTmrReset(tscProcessStreamTimer, starttime, pStream, tscTmr, &pStream->pTimer);
+
+  tscDebug("%p stream:%p is opened, query on:%s, interval:%" PRId64 ", sliding:%" PRId64 ", first launched in:%" PRId64 ", sql:%s", pSql,
+           pStream, pTableMetaInfo->name, pStream->interval, pStream->slidingTime, starttime, pSql->sqlstr);
+}
+
 TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
                               int64_t stime, void *param, void (*callback)(void *)) {
   STscObj *pObj = (STscObj *)taos;
@@ -482,7 +518,6 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
   }
 
   pSql->signature = pSql;
-  pSql->param = pSql;
   pSql->pTscObj = pObj;
 
   SSqlCmd *pCmd = &pSql->cmd;
@@ -494,7 +529,14 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
     tscFreeSqlObj(pSql);
     return NULL;
   }
+
+  pStream->stime = stime;
+  pStream->fp = fp;
+  pStream->callback = callback;
+  pStream->param = param;
+  pStream->pSql = pSql;
   pSql->pStream = pStream;
+  pSql->param = pStream;
 
   pSql->sqlstr = calloc(1, strlen(sqlstr) + 1);
   if (pSql->sqlstr == NULL) {
@@ -507,45 +549,18 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
   tscDebugL("%p SQL: %s", pSql, pSql->sqlstr);
   tsem_init(&pSql->rspSem, 0, 0);
 
+  pSql->fp = tscCreateStream;
+  pSql->fetchFp = tscCreateStream;
   int32_t code = tsParseSql(pSql, true);
-  if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
-    sem_wait(&pSql->rspSem);
-  }
-
-  if (pRes->code != TSDB_CODE_SUCCESS) {
-    setErrorInfo(pSql, pRes->code, pCmd->payload);
-
-    tscError("%p open stream failed, sql:%s, reason:%s, code:0x%08x", pSql, sqlstr, pCmd->payload, pRes->code);
+  if (code == TSDB_CODE_SUCCESS) {
+    tscCreateStream(pStream, pSql, code);
+  } else if (code != TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+    tscError("%p open stream failed, sql:%s, code:%s", pSql, sqlstr, tstrerror(pRes->code));
     tscFreeSqlObj(pSql);
+    free(pStream);
     return NULL;
   }
 
-  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
-  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
-  STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);
-  
-  pStream->isProject = isProjectStream(pQueryInfo);
-  pStream->fp = fp;
-  pStream->callback = callback;
-  pStream->param = param;
-  pStream->pSql = pSql;
-  pStream->precision = tinfo.precision;
-
-  pStream->ctime = taosGetTimestamp(pStream->precision);
-  pStream->etime = pQueryInfo->window.ekey;
-
-  tscAddIntoStreamList(pStream);
-
-  tscSetSlidingWindowInfo(pSql, pStream);
-  pStream->stime = tscGetStreamStartTimestamp(pSql, pStream, stime);
-
-  int64_t starttime = tscGetLaunchTimestamp(pStream);
-  pCmd->command = TSDB_SQL_SELECT;
-  taosTmrReset(tscProcessStreamTimer, starttime, pStream, tscTmr, &pStream->pTimer);
-
-  tscDebug("%p stream:%p is opened, query on:%s, interval:%" PRId64 ", sliding:%" PRId64 ", first launched in:%" PRId64 ", sql:%s", pSql,
-           pStream, pTableMetaInfo->name, pStream->interval, pStream->slidingTime, starttime, sqlstr);
-
   return pStream;
 }
 
diff --git a/src/client/src/tscSub.c b/src/client/src/tscSub.c
index f7d03bd787..2c5035c2ef 100644
--- a/src/client/src/tscSub.c
+++ b/src/client/src/tscSub.c
@@ -107,7 +107,7 @@ static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char*
     pSql->signature = pSql;
     pSql->param = pSql;
     pSql->pTscObj = pObj;
-    pSql->maxRetry = TSDB_MAX_REPLICA_NUM;
+    pSql->maxRetry = TSDB_MAX_REPLICA;
     pSql->fp = asyncCallback;
 
     int code = tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE);
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index d3f298c2b2..dd4ed991ed 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -152,8 +152,8 @@ static int64_t doTSBlockIntersect(SSqlObj* pSql, SJoinSupporter* pSupporter1, SJ
   tsBufFlush(output1);
   tsBufFlush(output2);
 
-  tsBufDestory(pSupporter1->pTSBuf);
-  tsBufDestory(pSupporter2->pTSBuf);
+  tsBufDestroy(pSupporter1->pTSBuf);
+  tsBufDestroy(pSupporter2->pTSBuf);
 
   tscDebug("%p input1:%" PRId64 ", input2:%" PRId64 ", final:%" PRId64 " for secondary query after ts blocks "
            "intersecting, skey:%" PRId64 ", ekey:%" PRId64, pSql, numOfInput1, numOfInput2, output1->numOfTotal,
@@ -550,7 +550,7 @@ static bool checkForDuplicateTagVal(SQueryInfo* pQueryInfo, SJoinSupporter* p1,
   return true;
 }
 
-static void getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pParentSql, SArray** s1, SArray** s2) {
+static int32_t getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pParentSql, SArray** s1, SArray** s2) {
   tscDebug("%p all subqueries retrieve <tid, tags> complete, do tags match", pParentSql);
 
   SJoinSupporter* p1 = pParentSql->pSubs[0]->param;
@@ -568,10 +568,7 @@ static void getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pParent
   *s2 = taosArrayInit(p2->num, p2->tagSize);
 
   if (!(checkForDuplicateTagVal(pQueryInfo, p1, pParentSql) && checkForDuplicateTagVal(pQueryInfo, p2, pParentSql))) {
-    freeJoinSubqueryObj(pParentSql);
-    pParentSql->res.code = TSDB_CODE_QRY_DUP_JOIN_KEY;
-    tscQueueAsyncRes(pParentSql);
-    return;
+    return TSDB_CODE_QRY_DUP_JOIN_KEY;
   }
 
   int32_t i = 0, j = 0;
@@ -594,6 +591,8 @@ static void getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pParent
       i++;
     }
   }
+
+  return TSDB_CODE_SUCCESS;
 }
 
 static void tidTagRetrieveCallback(void* param, TAOS_RES* tres, int32_t numOfRows) {
@@ -680,7 +679,14 @@ static void tidTagRetrieveCallback(void* param, TAOS_RES* tres, int32_t numOfRow
   }
 
   SArray *s1 = NULL, *s2 = NULL;
-  getIntersectionOfTableTuple(pQueryInfo, pParentSql, &s1, &s2);
+  int32_t code = getIntersectionOfTableTuple(pQueryInfo, pParentSql, &s1, &s2);
+  if (code != TSDB_CODE_SUCCESS) {
+    freeJoinSubqueryObj(pParentSql);
+    pParentSql->res.code = code;
+    tscQueueAsyncRes(pParentSql);
+    return;
+  }
+
   if (taosArrayGetSize(s1) == 0 || taosArrayGetSize(s2) == 0) {  // no results,return.
     tscDebug("%p tag intersect does not generated qualified tables for join, free all sub SqlObj and quit", pParentSql);
     freeJoinSubqueryObj(pParentSql);
@@ -762,7 +768,7 @@ static void tsCompRetrieveCallback(void* param, TAOS_RES* tres, int32_t numOfRow
       STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
 
       tsBufMerge(pSupporter->pTSBuf, pBuf, pTableMetaInfo->vgroupIndex);
-      tsBufDestory(pBuf);
+      tsBufDestroy(pBuf);
     }
 
     // continue to retrieve ts-comp data from vnode
@@ -1778,7 +1784,6 @@ static SSqlObj *tscCreateSqlObjForSubquery(SSqlObj *pSql, SRetrieveSupport *trsu
     pSql->pSubs[trsupport->subqueryIndex] = pNew;
   }
   
-  printf("------------alloc:%p\n", pNew);
   return pNew;
 }
 
@@ -1890,9 +1895,11 @@ int32_t tscHandleInsertRetry(SSqlObj* pSql) {
   assert(pSupporter->index < pSupporter->pState->numOfTotal);
 
   STableDataBlocks* pTableDataBlock = taosArrayGetP(pCmd->pDataBlocks, pSupporter->index);
-  pRes->code = tscCopyDataBlockToPayload(pSql, pTableDataBlock);
-  if (pRes->code != TSDB_CODE_SUCCESS) {
-    return pRes->code;
+  int32_t code = tscCopyDataBlockToPayload(pSql, pTableDataBlock);
+
+  if ((pRes->code = code)!= TSDB_CODE_SUCCESS) {
+    tscQueueAsyncRes(pSql);
+    return code;  // here the pSql may have been released already.
   }
 
   return tscProcessSql(pSql);
@@ -2107,9 +2114,9 @@ static char *getArithemicInputSrc(void *param, const char *name, int32_t colId)
 void **doSetResultRowData(SSqlObj *pSql, bool finalResult) {
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
-  
+
   assert(pRes->row >= 0 && pRes->row <= pRes->numOfRows);
-  
+
   if(pCmd->command == TSDB_SQL_TABLE_JOIN_RETRIEVE) {
     if (pRes->completed) {
       tfree(pRes->tsrow);
@@ -2117,29 +2124,31 @@ void **doSetResultRowData(SSqlObj *pSql, bool finalResult) {
 
     return pRes->tsrow;
   }
-  
+
   if (pRes->row >= pRes->numOfRows) {  // all the results has returned to invoker
     tfree(pRes->tsrow);
     return pRes->tsrow;
   }
-  
+
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
-  
+
   size_t size = tscNumOfFields(pQueryInfo);
   for (int i = 0; i < size; ++i) {
-    SFieldSupInfo* pSup = tscFieldInfoGetSupp(&pQueryInfo->fieldsInfo, i);
+    SFieldSupInfo* pSup = TARRAY_GET_ELEM(pQueryInfo->fieldsInfo.pSupportInfo, i);
     if (pSup->pSqlExpr != NULL) {
       tscGetResultColumnChr(pRes, &pQueryInfo->fieldsInfo, i);
     }
-    
+
     // primary key column cannot be null in interval query, no need to check
     if (i == 0 && pQueryInfo->intervalTime > 0) {
       continue;
     }
-    
-    TAOS_FIELD *pField = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, i);
-    transferNcharData(pSql, i, pField);
-    
+
+    TAOS_FIELD *pField = TARRAY_GET_ELEM(pQueryInfo->fieldsInfo.pFields, i);
+    if (pRes->tsrow[i] != NULL && pField->type == TSDB_DATA_TYPE_NCHAR) {
+      transferNcharData(pSql, i, pField);
+    }
+
     // calculate the result from several other columns
     if (pSup->pArithExprInfo != NULL) {
       if (pRes->pArithSup == NULL) {
@@ -2149,10 +2158,10 @@ void **doSetResultRowData(SSqlObj *pSql, bool finalResult) {
         sas->numOfCols  = tscSqlExprNumOfExprs(pQueryInfo);
         sas->exprList   = pQueryInfo->exprList;
         sas->data       = calloc(sas->numOfCols, POINTER_BYTES);
-        
+
         pRes->pArithSup = sas;
       }
-      
+
       if (pRes->buffer[i] == NULL) {
         TAOS_FIELD* field = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, i);
         pRes->buffer[i] = malloc(field->bytes);
@@ -2162,13 +2171,13 @@ void **doSetResultRowData(SSqlObj *pSql, bool finalResult) {
         SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, k);
         pRes->pArithSup->data[k] = (pRes->data + pRes->numOfRows* pExpr->offset) + pRes->row*pExpr->resBytes;
       }
-  
+
       tExprTreeCalcTraverse(pRes->pArithSup->pArithExpr->pExpr, 1, pRes->buffer[i], pRes->pArithSup,
           TSDB_ORDER_ASC, getArithemicInputSrc);
       pRes->tsrow[i] = pRes->buffer[i];
     }
   }
-  
+
   pRes->row++;  // index increase one-step
   return pRes->tsrow;
 }
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index a58423bbaa..3e0fe0b4be 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -794,7 +794,7 @@ SFieldSupInfo* tscFieldInfoAppend(SFieldInfo* pFieldInfo, TAOS_FIELD* pField) {
 }
 
 SFieldSupInfo* tscFieldInfoGetSupp(SFieldInfo* pFieldInfo, int32_t index) {
-  return taosArrayGet(pFieldInfo->pSupportInfo, index);
+  return TARRAY_GET_ELEM(pFieldInfo->pSupportInfo, index);
 }
 
 SFieldSupInfo* tscFieldInfoInsert(SFieldInfo* pFieldInfo, int32_t index, TAOS_FIELD* field) {
@@ -858,11 +858,9 @@ void tscFieldInfoCopy(SFieldInfo* dst, const SFieldInfo* src) {
 }
 
 TAOS_FIELD* tscFieldInfoGetField(SFieldInfo* pFieldInfo, int32_t index) {
-  return taosArrayGet(pFieldInfo->pFields, index);
+  return TARRAY_GET_ELEM(pFieldInfo->pFields, index);
 }
 
-int32_t tscNumOfFields(SQueryInfo* pQueryInfo) { return pQueryInfo->fieldsInfo.numOfOutput; }
-
 int16_t tscFieldInfoGetOffset(SQueryInfo* pQueryInfo, int32_t index) {
   SFieldSupInfo* pInfo = tscFieldInfoGetSupp(&pQueryInfo->fieldsInfo, index);
   assert(pInfo != NULL);
@@ -1546,7 +1544,7 @@ static void freeQueryInfoImpl(SQueryInfo* pQueryInfo) {
     pQueryInfo->groupbyExpr.columnInfo = NULL;
   }
   
-  pQueryInfo->tsBuf = tsBufDestory(pQueryInfo->tsBuf);
+  pQueryInfo->tsBuf = tsBufDestroy(pQueryInfo->tsBuf);
 
   tfree(pQueryInfo->fillVal);
 }
@@ -1650,8 +1648,9 @@ SSqlObj* createSimpleSubObj(SSqlObj* pSql, void (*fp)(), void* param, int32_t cm
   }
 
   pNew->fp = fp;
+  pNew->fetchFp = fp;
   pNew->param = param;
-  pNew->maxRetry = TSDB_MAX_REPLICA_NUM;
+  pNew->maxRetry = TSDB_MAX_REPLICA;
 
   pNew->sqlstr = strdup(pSql->sqlstr);
   if (pNew->sqlstr == NULL) {
@@ -1805,8 +1804,10 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
   }
 
   pNew->fp = fp;
+  pNew->fetchFp = fp;
+
   pNew->param = param;
-  pNew->maxRetry = TSDB_MAX_REPLICA_NUM;
+  pNew->maxRetry = TSDB_MAX_REPLICA;
 
   char* name = pTableMetaInfo->name;
   STableMetaInfo* pFinalInfo = NULL;
@@ -2007,7 +2008,7 @@ void tscTryQueryNextVnode(SSqlObj* pSql, __async_cb_func_t fp) {
   STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
   
   int32_t totalVgroups = pTableMetaInfo->vgroupList->numOfVgroups;
-  while (++pTableMetaInfo->vgroupIndex < totalVgroups) {
+  if (++pTableMetaInfo->vgroupIndex < totalVgroups) {
     tscDebug("%p results from vgroup index:%d completed, try next:%d. total vgroups:%d. current numOfRes:%" PRId64, pSql,
              pTableMetaInfo->vgroupIndex - 1, pTableMetaInfo->vgroupIndex, totalVgroups, pRes->numOfClauseTotal);
 
@@ -2043,11 +2044,9 @@ void tscTryQueryNextVnode(SSqlObj* pSql, __async_cb_func_t fp) {
 
     // set the callback function
     pSql->fp = fp;
-    int32_t ret = tscProcessSql(pSql);
-    if (ret == TSDB_CODE_SUCCESS) {
-      return;
-    } else {// todo check for failure
-    }
+    tscProcessSql(pSql);
+  } else {
+    tscDebug("%p try all %d vnodes, query complete. current numOfRes:%" PRId64, pSql, totalVgroups, pRes->numOfClauseTotal);
   }
 }
 
@@ -2085,42 +2084,42 @@ void tscTryQueryNextClause(SSqlObj* pSql, void (*queryFp)()) {
   }
 }
 
-void tscGetResultColumnChr(SSqlRes* pRes, SFieldInfo* pFieldInfo, int32_t columnIndex) {
-  SFieldSupInfo* pInfo = taosArrayGet(pFieldInfo->pSupportInfo, columnIndex);
-  assert(pInfo->pSqlExpr != NULL);
-
-  int32_t type = pInfo->pSqlExpr->resType;
-  int32_t bytes = pInfo->pSqlExpr->resBytes;
-  
-  char* pData = pRes->data + pInfo->pSqlExpr->offset * pRes->numOfRows + bytes * pRes->row;
-  
-  if (type == TSDB_DATA_TYPE_NCHAR || type == TSDB_DATA_TYPE_BINARY) {
-    int32_t realLen = varDataLen(pData);
-    assert(realLen <= bytes - VARSTR_HEADER_SIZE);
-    
-    if (isNull(pData, type)) {
-      pRes->tsrow[columnIndex] = NULL;
-    } else {
-      pRes->tsrow[columnIndex] = ((tstr*)pData)->data;
-    }
-  
-    if (realLen < pInfo->pSqlExpr->resBytes - VARSTR_HEADER_SIZE) { // todo refactor
-      *(pData + realLen + VARSTR_HEADER_SIZE) = 0;
-    }
-    
-    pRes->length[columnIndex] = realLen;
-  } else {
-    assert(bytes == tDataTypeDesc[type].nSize);
-    
-    if (isNull(pData, type)) {
-      pRes->tsrow[columnIndex] = NULL;
-    } else {
-      pRes->tsrow[columnIndex] = pData;
-    }
-    
-    pRes->length[columnIndex] = bytes;
-  }
-}
+//void tscGetResultColumnChr(SSqlRes* pRes, SFieldInfo* pFieldInfo, int32_t columnIndex) {
+//  SFieldSupInfo* pInfo = TARRAY_GET_ELEM(pFieldInfo->pSupportInfo, columnIndex);
+//  assert(pInfo->pSqlExpr != NULL);
+//
+//  int32_t type = pInfo->pSqlExpr->resType;
+//  int32_t bytes = pInfo->pSqlExpr->resBytes;
+//
+//  char* pData = pRes->data + pInfo->pSqlExpr->offset * pRes->numOfRows + bytes * pRes->row;
+//
+//  if (type == TSDB_DATA_TYPE_NCHAR || type == TSDB_DATA_TYPE_BINARY) {
+//    int32_t realLen = varDataLen(pData);
+//    assert(realLen <= bytes - VARSTR_HEADER_SIZE);
+//
+//    if (isNull(pData, type)) {
+//      pRes->tsrow[columnIndex] = NULL;
+//    } else {
+//      pRes->tsrow[columnIndex] = ((tstr*)pData)->data;
+//    }
+//
+//    if (realLen < pInfo->pSqlExpr->resBytes - VARSTR_HEADER_SIZE) { // todo refactor
+//      *(pData + realLen + VARSTR_HEADER_SIZE) = 0;
+//    }
+//
+//    pRes->length[columnIndex] = realLen;
+//  } else {
+//    assert(bytes == tDataTypeDesc[type].nSize);
+//
+//    if (isNull(pData, type)) {
+//      pRes->tsrow[columnIndex] = NULL;
+//    } else {
+//      pRes->tsrow[columnIndex] = pData;
+//    }
+//
+//    pRes->length[columnIndex] = bytes;
+//  }
+//}
 
 void* malloc_throw(size_t size) {
   void* p = malloc(size);
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index da42c064ec..c42fccc372 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -68,7 +68,10 @@ extern int64_t tsMaxRetentWindow;
 // db parameters in client
 extern int32_t tsCacheBlockSize;
 extern int32_t tsBlocksPerVnode;
+extern int32_t tsMinTablePerVnode;
 extern int32_t tsMaxTablePerVnode;
+extern int32_t tsTableIncStepPerVnode;
+extern int32_t tsMaxVgroupsPerDb;
 extern int16_t tsDaysPerFile;
 extern int32_t tsDaysToKeep;
 extern int32_t tsMinRowsInFileBlock;
@@ -77,6 +80,7 @@ extern int16_t tsCommitTime;  // seconds
 extern int32_t tsTimePrecision;
 extern int16_t tsCompression;
 extern int16_t tsWAL;
+extern int32_t tsFsyncPeriod;
 extern int32_t tsReplications;
 
 // balance
diff --git a/src/common/inc/tulog.h b/src/common/inc/tulog.h
index 6365b21ef9..2dc2895e63 100644
--- a/src/common/inc/tulog.h
+++ b/src/common/inc/tulog.h
@@ -25,15 +25,15 @@ extern "C" {
 extern int32_t uDebugFlag;
 extern int32_t tscEmbedded;
 
-#define uFatal(...) { if (uDebugFlag & DEBUG_FATAL) { taosPrintLog("UTL FATAL ", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
+#define uFatal(...) { if (uDebugFlag & DEBUG_FATAL) { taosPrintLog("UTL FATAL", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
 #define uError(...) { if (uDebugFlag & DEBUG_ERROR) { taosPrintLog("UTL ERROR ", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
-#define uWarn(...)  { if (uDebugFlag & DEBUG_WARN)  { taosPrintLog("UTL WARN  ", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
-#define uInfo(...)  { if (uDebugFlag & DEBUG_INFO)  { taosPrintLog("UTL INFO  ", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
-#define uDebug(...) { if (uDebugFlag & DEBUG_DEBUG) { taosPrintLog("UTL DEBUG ", uDebugFlag, __VA_ARGS__); }}
-#define uTrace(...) { if (uDebugFlag & DEBUG_TRACE) { taosPrintLog("UTL TRACE ", uDebugFlag, __VA_ARGS__); }}
+#define uWarn(...)  { if (uDebugFlag & DEBUG_WARN)  { taosPrintLog("UTL WARN ", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
+#define uInfo(...)  { if (uDebugFlag & DEBUG_INFO)  { taosPrintLog("UTL ", tscEmbedded ? 255 : uDebugFlag, __VA_ARGS__); }}
+#define uDebug(...) { if (uDebugFlag & DEBUG_DEBUG) { taosPrintLog("UTL ", uDebugFlag, __VA_ARGS__); }}
+#define uTrace(...) { if (uDebugFlag & DEBUG_TRACE) { taosPrintLog("UTL ", uDebugFlag, __VA_ARGS__); }}
 
 #define pError(...) { taosPrintLog("APP ERROR ", 255, __VA_ARGS__); }  
-#define pPrint(...) { taosPrintLog("APP INFO  ", 255, __VA_ARGS__); }  
+#define pPrint(...) { taosPrintLog("APP ", 255, __VA_ARGS__); }  
 
 #ifdef __cplusplus
 }
diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 7e551759f9..719d80aa77 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -318,7 +318,7 @@ SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows) {
   pCols->maxPoints = maxRows;
   pCols->bufSize = maxRowSize * maxRows;
 
-  pCols->buf = malloc(pCols->bufSize);
+  pCols->buf = calloc(1, pCols->bufSize);
   if (pCols->buf == NULL) {
     free(pCols);
     return NULL;
@@ -384,9 +384,11 @@ SDataCols *tdDupDataCols(SDataCols *pDataCols, bool keepData) {
 }
 
 void tdResetDataCols(SDataCols *pCols) {
-  pCols->numOfRows = 0;
-  for (int i = 0; i < pCols->maxCols; i++) {
-    dataColReset(pCols->cols + i);
+  if (pCols != NULL) {
+    pCols->numOfRows = 0;
+    for (int i = 0; i < pCols->maxCols; i++) {
+      dataColReset(pCols->cols + i);
+    }
   }
 }
 
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index fae771e855..f1f4db7265 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -38,7 +38,7 @@ uint16_t tsDnodeShellPort = 6030;  // udp[6035-6039] tcp[6035]
 uint16_t tsDnodeDnodePort = 6035;  // udp/tcp
 uint16_t tsSyncPort = 6040;
 int32_t  tsStatusInterval = 1;  // second
-int16_t  tsNumOfVnodesPerCore = 8;
+int16_t  tsNumOfVnodesPerCore = 32;
 int16_t  tsNumOfTotalVnodes = TSDB_INVALID_VNODE_NUM;
 int32_t  tsNumOfMnodes = 3;
 int32_t  tsEnableVnodeBak = 1;
@@ -110,13 +110,12 @@ int16_t tsCommitTime    = TSDB_DEFAULT_COMMIT_TIME;  // seconds
 int32_t tsTimePrecision = TSDB_DEFAULT_PRECISION;
 int16_t tsCompression   = TSDB_DEFAULT_COMP_LEVEL;
 int16_t tsWAL           = TSDB_DEFAULT_WAL_LEVEL;
-int32_t tsReplications  = TSDB_DEFAULT_REPLICA_NUM;
-
-#ifdef _TD_ARM_32_
-  int32_t tsMaxTablePerVnode = 100;
-#else
-  int32_t tsMaxTablePerVnode = TSDB_DEFAULT_TABLES;
-#endif
+int32_t tsFsyncPeriod   = TSDB_DEFAULT_FSYNC_PERIOD;
+int32_t tsReplications  = TSDB_DEFAULT_DB_REPLICA_OPTION;
+int32_t tsMaxVgroupsPerDb  = 0;
+int32_t tsMinTablePerVnode = 100;
+int32_t tsMaxTablePerVnode = TSDB_DEFAULT_TABLES;
+int32_t tsTableIncStepPerVnode = TSDB_TABLES_STEP;
 
 // balance
 int32_t tsEnableBalance = 1;
@@ -195,7 +194,7 @@ int32_t monitorDebugFlag = 131;
 int32_t qDebugFlag = 131;
 int32_t rpcDebugFlag = 131;
 int32_t uDebugFlag = 131;
-int32_t debugFlag = 131;
+int32_t debugFlag = 0;
 int32_t sDebugFlag = 135;
 int32_t wDebugFlag = 135;
 int32_t tsdbDebugFlag = 131;
@@ -203,7 +202,7 @@ int32_t tsdbDebugFlag = 131;
 static pthread_once_t tsInitGlobalCfgOnce = PTHREAD_ONCE_INIT;
 
 void taosSetAllDebugFlag() {
-  for (int32_t i = 0; i < tsGlobalConfigNum; ++i) {
+  if (debugFlag != 0) { 
     mDebugFlag = debugFlag;
     sdbDebugFlag = debugFlag;
     dDebugFlag = debugFlag;
@@ -220,8 +219,8 @@ void taosSetAllDebugFlag() {
     wDebugFlag = debugFlag;
     tsdbDebugFlag = debugFlag;
     qDebugFlag = debugFlag;    
+    uInfo("all debug flag are set to %d", debugFlag);
   }
-  uInfo("all debug flag are set to %d", debugFlag);
 }
 
 bool taosCfgDynamicOptions(char *msg) {
@@ -394,16 +393,6 @@ static void doInitGlobalConfig() {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "numOfVnodesPerCore";
-  cfg.ptr = &tsNumOfVnodesPerCore;
-  cfg.valType = TAOS_CFG_VTYPE_INT16;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = 1;
-  cfg.maxValue = 64;
-  cfg.ptrLength = 0;
-  cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
-
   cfg.option = "numOfTotalVnodes";
   cfg.ptr = &tsNumOfTotalVnodes;
   cfg.valType = TAOS_CFG_VTYPE_INT16;
@@ -560,7 +549,7 @@ static void doInitGlobalConfig() {
   cfg.ptr = &tsMinIntervalTime;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = 10;
+  cfg.minValue = 1;
   cfg.maxValue = 1000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
@@ -606,8 +595,18 @@ static void doInitGlobalConfig() {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "maxVgroupsPerDb";
+  cfg.ptr = &tsMaxVgroupsPerDb;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 0;
+  cfg.maxValue = 8192;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   // database configs
-  cfg.option = "maxtablesPerVnode";
+  cfg.option = "maxTablesPerVnode";
   cfg.ptr = &tsMaxTablePerVnode;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
@@ -617,6 +616,26 @@ static void doInitGlobalConfig() {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "minTablesPerVnode";
+  cfg.ptr = &tsMinTablePerVnode;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_TABLES;
+  cfg.maxValue = TSDB_MAX_TABLES;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
+  cfg.option = "tableIncStepPerVnode";
+  cfg.ptr = &tsTableIncStepPerVnode;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_TABLES;
+  cfg.maxValue = TSDB_MAX_TABLES;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "cache";
   cfg.ptr = &tsCacheBlockSize;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
@@ -697,12 +716,22 @@ static void doInitGlobalConfig() {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "fsync";
+  cfg.ptr = &tsFsyncPeriod;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_FSYNC_PERIOD;
+  cfg.maxValue = TSDB_MAX_FSYNC_PERIOD;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "replica";
   cfg.ptr = &tsReplications;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
-  cfg.minValue = TSDB_MIN_REPLICA_NUM;
-  cfg.maxValue = TSDB_MAX_REPLICA_NUM;
+  cfg.minValue = TSDB_MIN_DB_REPLICA_OPTION;
+  cfg.maxValue = TSDB_MAX_DB_REPLICA_OPTION;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
diff --git a/src/common/src/tname.c b/src/common/src/tname.c
index 8b85ecfbc7..15ec68fc66 100644
--- a/src/common/src/tname.c
+++ b/src/common/src/tname.c
@@ -82,7 +82,7 @@ int64_t taosGetIntervalStartTimestamp(int64_t startTime, int64_t slidingTime, in
   }
 
   int64_t start = ((startTime - intervalTime) / slidingTime + 1) * slidingTime;
-  if (!(timeUnit == 'a' || timeUnit == 'm' || timeUnit == 's' || timeUnit == 'h')) {
+  if (!(timeUnit == 'u' || timeUnit == 'a' || timeUnit == 'm' || timeUnit == 's' || timeUnit == 'h')) {
     /*
      * here we revised the start time of day according to the local time zone,
      * but in case of DST, the start time of one day need to be dynamically decided.
diff --git a/src/common/src/ttypes.c b/src/common/src/ttypes.c
index eff25e8c93..44b1d9fc38 100644
--- a/src/common/src/ttypes.c
+++ b/src/common/src/ttypes.c
@@ -367,31 +367,31 @@ bool isValidDataType(int32_t type) {
   return type >= TSDB_DATA_TYPE_NULL && type <= TSDB_DATA_TYPE_NCHAR;
 }
 
-bool isNull(const char *val, int32_t type) {
-  switch (type) {
-    case TSDB_DATA_TYPE_BOOL:
-      return *(uint8_t *)val == TSDB_DATA_BOOL_NULL;
-    case TSDB_DATA_TYPE_TINYINT:
-      return *(uint8_t *)val == TSDB_DATA_TINYINT_NULL;
-    case TSDB_DATA_TYPE_SMALLINT:
-      return *(uint16_t *)val == TSDB_DATA_SMALLINT_NULL;
-    case TSDB_DATA_TYPE_INT:
-      return *(uint32_t *)val == TSDB_DATA_INT_NULL;
-    case TSDB_DATA_TYPE_BIGINT:
-    case TSDB_DATA_TYPE_TIMESTAMP:
-      return *(uint64_t *)val == TSDB_DATA_BIGINT_NULL;
-    case TSDB_DATA_TYPE_FLOAT:
-      return *(uint32_t *)val == TSDB_DATA_FLOAT_NULL;
-    case TSDB_DATA_TYPE_DOUBLE:
-      return *(uint64_t *)val == TSDB_DATA_DOUBLE_NULL;
-    case TSDB_DATA_TYPE_NCHAR:
-      return *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
-    case TSDB_DATA_TYPE_BINARY:
-      return *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
-    default:
-      return false;
-  };
-}
+//bool isNull(const char *val, int32_t type) {
+//  switch (type) {
+//    case TSDB_DATA_TYPE_BOOL:
+//      return *(uint8_t *)val == TSDB_DATA_BOOL_NULL;
+//    case TSDB_DATA_TYPE_TINYINT:
+//      return *(uint8_t *)val == TSDB_DATA_TINYINT_NULL;
+//    case TSDB_DATA_TYPE_SMALLINT:
+//      return *(uint16_t *)val == TSDB_DATA_SMALLINT_NULL;
+//    case TSDB_DATA_TYPE_INT:
+//      return *(uint32_t *)val == TSDB_DATA_INT_NULL;
+//    case TSDB_DATA_TYPE_BIGINT:
+//    case TSDB_DATA_TYPE_TIMESTAMP:
+//      return *(uint64_t *)val == TSDB_DATA_BIGINT_NULL;
+//    case TSDB_DATA_TYPE_FLOAT:
+//      return *(uint32_t *)val == TSDB_DATA_FLOAT_NULL;
+//    case TSDB_DATA_TYPE_DOUBLE:
+//      return *(uint64_t *)val == TSDB_DATA_DOUBLE_NULL;
+//    case TSDB_DATA_TYPE_NCHAR:
+//      return *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
+//    case TSDB_DATA_TYPE_BINARY:
+//      return *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
+//    default:
+//      return false;
+//  };
+//}
 
 void setVardataNull(char* val, int32_t type) {
   if (type == TSDB_DATA_TYPE_BINARY) {
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/TDNode.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/TDNode.java
index 48290d3e62..273bc6920c 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/TDNode.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/TDNode.java
@@ -52,7 +52,7 @@ public class TDNode {
     public void start() {
         String selfPath = System.getProperty("user.dir");
         String binPath = "";
-        String projDir = selfPath + "/../../../../";
+        String projDir = selfPath + "/../../../";
 
         try {
             ArrayList<String> taosdPath = new ArrayList<>();
@@ -68,7 +68,7 @@ public class TDNode {
                 return;
             } else {
                 for(String p : taosdPath) {
-                    if(!p.contains("packing")) {
+                    if(!p.contains("packaging")) {
                         binPath = p;
                     }
                 }
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/BatchInsertTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/BatchInsertTest.java
new file mode 100644
index 0000000000..cb78a5ca0e
--- /dev/null
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/BatchInsertTest.java
@@ -0,0 +1,123 @@
+package com.taosdata.jdbc;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.Properties;
+import java.util.Random;
+
+import static org.junit.Assert.assertEquals;
+import java.util.Properties;
+import java.util.concurrent.Executors;
+import java.util.concurrent.*;
+
+import static org.junit.Assert.assertTrue;
+
+public class BatchInsertTest extends BaseTest {
+
+    static Connection connection = null;
+    static Statement statement = null;
+    static String dbName = "test";
+    static String stbName = "meters";
+    static String host = "localhost";
+    static int numOfTables = 30;
+    final static int numOfRecordsPerTable = 1000;
+    static long ts = 1496732686000l;
+    final static String tablePrefix = "t";
+
+    @Before
+    public void createDatabase() throws SQLException {
+        try {
+            Class.forName("com.taosdata.jdbc.TSDBDriver");
+        } catch (ClassNotFoundException e) {
+            return;
+        }
+        
+        Properties properties = new Properties();
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, host);
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+        connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/" + "?user=root&password=taosdata"
+                , properties);
+                
+        statement = connection.createStatement();
+        statement.executeUpdate("drop database if exists " + dbName);
+        statement.executeUpdate("create database if not exists " + dbName);
+        statement.executeUpdate("use " + dbName);
+
+        String createTableSql = "create table " + stbName + "(ts timestamp, f1 int, f2 int, f3 int) tags(areaid int, loc binary(20))";  
+        statement.executeUpdate(createTableSql); 
+
+        for(int i = 0; i < numOfTables; i++) {
+            String loc = i % 2 == 0 ? "beijing" : "shanghai";
+            String createSubTalbesSql = "create table " + tablePrefix + i + " using " + stbName + " tags(" + i + ", '" + loc + "')";             
+            statement.executeUpdate(createSubTalbesSql); 
+        }
+
+    }
+    
+    @Test
+    public void testBatchInsert() throws SQLException{
+        
+        ExecutorService executorService = Executors.newFixedThreadPool(numOfTables);        
+                    
+        for (int i = 0; i < numOfTables; i++) { 
+            final int index = i;                       
+            executorService.execute(new Runnable() {
+                @Override
+                public void run() {                    
+                    try {                        
+                        long startTime = System.currentTimeMillis();                        
+                        Statement statement = connection.createStatement(); // get statement                        
+                        StringBuilder sb = new StringBuilder();
+                        sb.append("INSERT INTO " + tablePrefix + index + " VALUES");
+                        Random rand = new Random();
+                        for (int j = 1; j <= numOfRecordsPerTable; j++) {
+                            sb.append("(" + (ts + j) + ", ");
+                            sb.append(rand.nextInt(100) + ", ");
+                            sb.append(rand.nextInt(100) + ", ");
+                            sb.append(rand.nextInt(100) + ")");                            
+                        }                        
+                        statement.addBatch(sb.toString());                        
+                        statement.executeBatch();
+                        long endTime = System.currentTimeMillis();
+                        System.out.println("Thread " + index + " takes " + (endTime - startTime) +  " microseconds");
+                        connection.commit();                                                
+                        statement.close();                        
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                }
+            });
+        }
+
+        executorService.shutdown();
+
+        try {
+            executorService.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        Statement statement = connection.createStatement();
+        ResultSet rs = statement.executeQuery("select * from meters"); 
+        int num = 0;
+        while (rs.next()) {
+            num++;
+        }           
+        assertEquals(num, numOfTables * numOfRecordsPerTable);        
+        rs.close();
+    }
+
+
+    @After
+    public void close() throws Exception {        
+        statement.close();
+        connection.close();
+        Thread.sleep(10);
+    }
+    
+}
\ No newline at end of file
diff --git a/src/cq/src/cqMain.c b/src/cq/src/cqMain.c
index 04d3a6fd6d..51cd471a6b 100644
--- a/src/cq/src/cqMain.c
+++ b/src/cq/src/cqMain.c
@@ -23,6 +23,7 @@
 #include "taos.h"
 #include "taosdef.h"
 #include "taosmsg.h"
+#include "ttimer.h"
 #include "tcq.h"
 #include "tdataformat.h"
 #include "tglobal.h"
@@ -45,10 +46,12 @@ typedef struct {
   struct SCqObj *pHead;
   void    *dbConn;
   int      master;
+  void    *tmrCtrl;
   pthread_mutex_t mutex;
 } SCqContext;
 
 typedef struct SCqObj {
+  tmr_h          tmrId;
   uint64_t       uid;
   int32_t        tid;      // table ID
   int            rowSize;  // bytes of a row
@@ -66,13 +69,14 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row);
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj);
 
 void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
-  
   SCqContext *pContext = calloc(sizeof(SCqContext), 1);
   if (pContext == NULL) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     return NULL;
   }
 
+  pContext->tmrCtrl = taosTmrInit(0, 0, 0, "CQ");
+
   tstrncpy(pContext->user, pCfg->user, sizeof(pContext->user));
   tstrncpy(pContext->pass, pCfg->pass, sizeof(pContext->pass));
   const char* db = pCfg->db;
@@ -99,6 +103,9 @@ void cqClose(void *handle) {
   SCqContext *pContext = handle;
   if (handle == NULL) return;
 
+  taosTmrCleanUp(pContext->tmrCtrl);
+  pContext->tmrCtrl = NULL;
+
   // stop all CQs
   cqStop(pContext);
 
@@ -154,8 +161,10 @@ void cqStop(void *handle) {
       taos_close_stream(pObj->pStream);
       pObj->pStream = NULL;
       cTrace("vgId:%d, id:%d CQ:%s is closed", pContext->vgId, pObj->tid, pObj->sqlStr);
+    } else {
+      taosTmrStop(pObj->tmrId);
+      pObj->tmrId = 0;
     }
-
     pObj = pObj->next;
   }
 
@@ -211,8 +220,13 @@ void cqDrop(void *handle) {
   }
 
   // free the resources associated
-  if (pObj->pStream) taos_close_stream(pObj->pStream);
-  pObj->pStream = NULL;
+  if (pObj->pStream) {
+    taos_close_stream(pObj->pStream);
+    pObj->pStream = NULL;
+  } else {
+    taosTmrStop(pObj->tmrId);
+    pObj->tmrId = 0;
+  }
 
   cTrace("vgId:%d, id:%d CQ:%s is dropped", pContext->vgId, pObj->tid, pObj->sqlStr); 
   tdFreeSchema(pObj->pSchema);
@@ -222,18 +236,30 @@ void cqDrop(void *handle) {
   pthread_mutex_unlock(&pContext->mutex);
 }
 
-static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
+static void cqProcessCreateTimer(void *param, void *tmrId) {
+  SCqObj* pObj = (SCqObj*)param;
+  SCqContext* pContext = pObj->pContext;
+
   if (pContext->dbConn == NULL) {
     pContext->dbConn = taos_connect("localhost", pContext->user, pContext->pass, pContext->db, 0);
     if (pContext->dbConn == NULL) {
       cError("vgId:%d, failed to connect to TDengine(%s)", pContext->vgId, tstrerror(terrno));
-      return;
     }
   }
+  
+  cqCreateStream(pContext, pObj);
+}
 
-  int64_t lastKey = 0;
+static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
   pObj->pContext = pContext;
-  pObj->pStream = taos_open_stream(pContext->dbConn, pObj->sqlStr, cqProcessStreamRes, lastKey, pObj, NULL);
+
+  if (pContext->dbConn == NULL) {
+    pObj->tmrId = taosTmrStart(cqProcessCreateTimer, 1000, pObj, pContext->tmrCtrl);
+    return;
+  }
+  pObj->tmrId = 0;
+
+  pObj->pStream = taos_open_stream(pContext->dbConn, pObj->sqlStr, cqProcessStreamRes, 0, pObj, NULL);
   if (pObj->pStream) {
     pContext->num++;
     cTrace("vgId:%d, id:%d CQ:%s is openned", pContext->vgId, pObj->tid, pObj->sqlStr);
diff --git a/src/dnode/inc/dnodeInt.h b/src/dnode/inc/dnodeInt.h
index 76f2f41673..f4cbee1d13 100644
--- a/src/dnode/inc/dnodeInt.h
+++ b/src/dnode/inc/dnodeInt.h
@@ -26,10 +26,10 @@ extern int32_t dDebugFlag;
 
 #define dFatal(...) { if (dDebugFlag & DEBUG_FATAL) { taosPrintLog("DND FATAL ", 255, __VA_ARGS__); }}
 #define dError(...) { if (dDebugFlag & DEBUG_ERROR) { taosPrintLog("DND ERROR ", 255, __VA_ARGS__); }}
-#define dWarn(...)  { if (dDebugFlag & DEBUG_WARN)  { taosPrintLog("DND WARN  ", 255, __VA_ARGS__); }}
-#define dInfo(...)  { if (dDebugFlag & DEBUG_INFO)  { taosPrintLog("DND INFO  ", 255, __VA_ARGS__); }}
-#define dDebug(...) { if (dDebugFlag & DEBUG_DEBUG) { taosPrintLog("DND DEBUG ", dDebugFlag, __VA_ARGS__); }}
-#define dTrace(...) { if (dDebugFlag & DEBUG_TRACE) { taosPrintLog("DND TRACE ", dDebugFlag, __VA_ARGS__); }}
+#define dWarn(...)  { if (dDebugFlag & DEBUG_WARN)  { taosPrintLog("DND WARN ", 255, __VA_ARGS__); }}
+#define dInfo(...)  { if (dDebugFlag & DEBUG_INFO)  { taosPrintLog("DND ", 255, __VA_ARGS__); }}
+#define dDebug(...) { if (dDebugFlag & DEBUG_DEBUG) { taosPrintLog("DND ", dDebugFlag, __VA_ARGS__); }}
+#define dTrace(...) { if (dDebugFlag & DEBUG_TRACE) { taosPrintLog("DND ", dDebugFlag, __VA_ARGS__); }}
 
 #ifdef __cplusplus
 }
diff --git a/src/dnode/inc/dnodeModule.h b/src/dnode/inc/dnodeModule.h
index 6a6da0a2a5..8618de3244 100644
--- a/src/dnode/inc/dnodeModule.h
+++ b/src/dnode/inc/dnodeModule.h
@@ -22,7 +22,6 @@ extern "C" {
 
 int32_t dnodeInitModules();
 void    dnodeStartModules();
-void    dnodeStartStream();
 void    dnodeCleanupModules();
 void    dnodeProcessModuleStatus(uint32_t moduleStatus);
 
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 987a189959..6476bb7831 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -123,7 +123,6 @@ int32_t dnodeInitSystem() {
 
   dnodeStartModules();
   dnodeSetRunStatus(TSDB_DNODE_RUN_STATUS_RUNING);
-  dnodeStartStream();
 
   dInfo("TDengine is initialized successfully");
 
diff --git a/src/dnode/src/dnodeMgmt.c b/src/dnode/src/dnodeMgmt.c
index b1c93d7195..8e1696c802 100644
--- a/src/dnode/src/dnodeMgmt.c
+++ b/src/dnode/src/dnodeMgmt.c
@@ -72,6 +72,7 @@ static void  *dnodeProcessMgmtQueue(void *param);
 static int32_t  dnodeOpenVnodes();
 static void     dnodeCloseVnodes();
 static int32_t  dnodeProcessCreateVnodeMsg(SRpcMsg *pMsg);
+static int32_t  dnodeProcessAlterVnodeMsg(SRpcMsg *pMsg);
 static int32_t  dnodeProcessDropVnodeMsg(SRpcMsg *pMsg);
 static int32_t  dnodeProcessAlterStreamMsg(SRpcMsg *pMsg);
 static int32_t  dnodeProcessConfigDnodeMsg(SRpcMsg *pMsg);
@@ -79,6 +80,7 @@ static int32_t (*dnodeProcessMgmtMsgFp[TSDB_MSG_TYPE_MAX])(SRpcMsg *pMsg);
 
 int32_t dnodeInitMgmt() {
   dnodeProcessMgmtMsgFp[TSDB_MSG_TYPE_MD_CREATE_VNODE] = dnodeProcessCreateVnodeMsg;
+  dnodeProcessMgmtMsgFp[TSDB_MSG_TYPE_MD_ALTER_VNODE] = dnodeProcessAlterVnodeMsg;
   dnodeProcessMgmtMsgFp[TSDB_MSG_TYPE_MD_DROP_VNODE]   = dnodeProcessDropVnodeMsg;
   dnodeProcessMgmtMsgFp[TSDB_MSG_TYPE_MD_ALTER_STREAM] = dnodeProcessAlterStreamMsg;
   dnodeProcessMgmtMsgFp[TSDB_MSG_TYPE_MD_CONFIG_DNODE] = dnodeProcessConfigDnodeMsg;
@@ -352,23 +354,6 @@ static int32_t dnodeOpenVnodes() {
   return TSDB_CODE_SUCCESS;
 }
 
-void dnodeStartStream() {
-  int32_t vnodeList[TSDB_MAX_VNODES] = {0};
-  int32_t numOfVnodes = 0;
-  int32_t status = vnodeGetVnodeList(vnodeList, &numOfVnodes);
-
-  if (status != TSDB_CODE_SUCCESS) {
-    dInfo("get dnode list failed");
-    return;
-  }
-
-  for (int32_t i = 0; i < numOfVnodes; ++i) {
-    vnodeStartStream(vnodeList[i]);
-  }
-
-  dInfo("streams started");
-}
-
 static void dnodeCloseVnodes() {
   int32_t vnodeList[TSDB_MAX_VNODES]= {0};
   int32_t numOfVnodes = 0;
@@ -388,7 +373,7 @@ static void dnodeCloseVnodes() {
   dInfo("total vnodes:%d are all closed", numOfVnodes);
 }
 
-static int32_t dnodeProcessCreateVnodeMsg(SRpcMsg *rpcMsg) {
+static void* dnodeParseVnodeMsg(SRpcMsg *rpcMsg) {
   SMDCreateVnodeMsg *pCreate = rpcMsg->pCont;
   pCreate->cfg.vgId                = htonl(pCreate->cfg.vgId);
   pCreate->cfg.cfgVersion          = htonl(pCreate->cfg.cfgVersion);
@@ -401,20 +386,42 @@ static int32_t dnodeProcessCreateVnodeMsg(SRpcMsg *rpcMsg) {
   pCreate->cfg.daysToKeep          = htonl(pCreate->cfg.daysToKeep);
   pCreate->cfg.minRowsPerFileBlock = htonl(pCreate->cfg.minRowsPerFileBlock);
   pCreate->cfg.maxRowsPerFileBlock = htonl(pCreate->cfg.maxRowsPerFileBlock);
+  pCreate->cfg.fsyncPeriod         = htonl(pCreate->cfg.fsyncPeriod);
   pCreate->cfg.commitTime          = htonl(pCreate->cfg.commitTime);
 
   for (int32_t j = 0; j < pCreate->cfg.replications; ++j) {
     pCreate->nodes[j].nodeId = htonl(pCreate->nodes[j].nodeId);
   }
 
-  void *pVnode = vnodeAcquireVnode(pCreate->cfg.vgId);
+  return pCreate;
+}
+
+static int32_t dnodeProcessCreateVnodeMsg(SRpcMsg *rpcMsg) {
+  SMDCreateVnodeMsg *pCreate = dnodeParseVnodeMsg(rpcMsg);
+
+  void *pVnode = vnodeAcquire(pCreate->cfg.vgId);
   if (pVnode != NULL) {
-    dDebug("vgId:%d, already exist, processed as alter msg", pCreate->cfg.vgId);
-    int32_t code = vnodeAlter(pVnode, pCreate);
+    dDebug("vgId:%d, already exist, return success", pCreate->cfg.vgId);
+    vnodeRelease(pVnode);
+    return TSDB_CODE_SUCCESS;
+  } else {
+    dDebug("vgId:%d, create vnode msg is received", pCreate->cfg.vgId);
+    return vnodeCreate(pCreate);
+  }
+}
+
+static int32_t dnodeProcessAlterVnodeMsg(SRpcMsg *rpcMsg) {
+  SMDAlterVnodeMsg *pAlter = dnodeParseVnodeMsg(rpcMsg);
+
+  void *pVnode = vnodeAcquire(pAlter->cfg.vgId);
+  if (pVnode != NULL) {
+    dDebug("vgId:%d, alter vnode msg is received", pAlter->cfg.vgId);
+    int32_t code = vnodeAlter(pVnode, pAlter);
     vnodeRelease(pVnode);
     return code;
   } else {
-    return vnodeCreate(pCreate);
+    dError("vgId:%d, vnode not exist, can't alter it", pAlter->cfg.vgId);
+    return TSDB_CODE_VND_INVALID_VGROUP_ID;
   }
 }
 
@@ -698,10 +705,13 @@ static void dnodeSendStatusMsg(void *handle, void *tmrId) {
   pStatus->alternativeRole  = (uint8_t) tsAlternativeRole;
 
   // fill cluster cfg parameters
-  pStatus->clusterCfg.numOfMnodes        = tsNumOfMnodes;
-  pStatus->clusterCfg.mnodeEqualVnodeNum = tsMnodeEqualVnodeNum;
-  pStatus->clusterCfg.offlineThreshold   = tsOfflineThreshold;
-  pStatus->clusterCfg.statusInterval     = tsStatusInterval;
+  pStatus->clusterCfg.numOfMnodes        = htonl(tsNumOfMnodes);
+  pStatus->clusterCfg.enableBalance      = htonl(tsEnableBalance);
+  pStatus->clusterCfg.mnodeEqualVnodeNum = htonl(tsMnodeEqualVnodeNum);
+  pStatus->clusterCfg.offlineThreshold   = htonl(tsOfflineThreshold);
+  pStatus->clusterCfg.statusInterval     = htonl(tsStatusInterval);
+  pStatus->clusterCfg.maxtablesPerVnode  = htonl(tsMaxTablePerVnode);
+  pStatus->clusterCfg.maxVgroupsPerDb    = htonl(tsMaxVgroupsPerDb);
   strcpy(pStatus->clusterCfg.arbitrator, tsArbitrator);
   strcpy(pStatus->clusterCfg.timezone, tsTimezone);
   strcpy(pStatus->clusterCfg.locale, tsLocale);
diff --git a/src/dnode/src/dnodePeer.c b/src/dnode/src/dnodePeer.c
index 6ab5188934..2a3436583f 100644
--- a/src/dnode/src/dnodePeer.c
+++ b/src/dnode/src/dnodePeer.c
@@ -44,6 +44,7 @@ int32_t dnodeInitServer() {
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_DROP_STABLE]  = dnodeDispatchToVnodeWriteQueue;
 
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CREATE_VNODE] = dnodeDispatchToMgmtQueue; 
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_VNODE]  = dnodeDispatchToMgmtQueue; 
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_DROP_VNODE]   = dnodeDispatchToMgmtQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_STREAM] = dnodeDispatchToMgmtQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CONFIG_DNODE] = dnodeDispatchToMgmtQueue;
@@ -60,7 +61,7 @@ int32_t dnodeInitServer() {
   rpcInit.label        = "DND-S";
   rpcInit.numOfThreads = 1;
   rpcInit.cfp          = dnodeProcessReqMsgFromDnode;
-  rpcInit.sessions     = 100;
+  rpcInit.sessions     = TSDB_MAX_VNODES;
   rpcInit.connType     = TAOS_CONN_SERVER;
   rpcInit.idleTime     = tsShellActivityTimer * 1000;
 
@@ -122,7 +123,7 @@ int32_t dnodeInitClient() {
   rpcInit.label        = "DND-C";
   rpcInit.numOfThreads = 1;
   rpcInit.cfp          = dnodeProcessRspFromDnode;
-  rpcInit.sessions     = 100;
+  rpcInit.sessions     = TSDB_MAX_VNODES;
   rpcInit.connType     = TAOS_CONN_CLIENT;
   rpcInit.idleTime     = tsShellActivityTimer * 1000;
   rpcInit.user         = "t";
diff --git a/src/dnode/src/dnodeSystem.c b/src/dnode/src/dnodeSystem.c
index 971bd0a110..901e0061e9 100644
--- a/src/dnode/src/dnodeSystem.c
+++ b/src/dnode/src/dnodeSystem.c
@@ -70,7 +70,13 @@ int32_t main(int32_t argc, char *argv[]) {
     }
 #endif
 #ifdef TAOS_RANDOM_FILE_FAIL
-    else if (strcmp(argv[i], "--random-file-fail-factor") == 0) {
+    else if (strcmp(argv[i], "--random-file-fail-output") == 0) {
+      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
+        taosSetRandomFileFailOutput(argv[++i]);
+      } else {
+        taosSetRandomFileFailOutput(NULL);
+      }
+    } else if (strcmp(argv[i], "--random-file-fail-factor") == 0) {
       if ( (i+1) < argc ) {
         int factor = atoi(argv[i+1]);
         printf("The factor of random failure is %d\n", factor);
@@ -129,7 +135,7 @@ int32_t main(int32_t argc, char *argv[]) {
 
 static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context) {
   if (signum == SIGUSR1) {
-    taosCfgDynamicOptions("debugFlag 151");
+    taosCfgDynamicOptions("debugFlag 143");
     return;
   }
   if (signum == SIGUSR2) {
diff --git a/src/dnode/src/dnodeVRead.c b/src/dnode/src/dnodeVRead.c
index 66135a93e9..bbea1a5e0b 100644
--- a/src/dnode/src/dnodeVRead.c
+++ b/src/dnode/src/dnodeVRead.c
@@ -91,23 +91,21 @@ void dnodeDispatchToVnodeReadQueue(SRpcMsg *pMsg) {
   int32_t     queuedMsgNum = 0;
   int32_t     leftLen      = pMsg->contLen;
   char        *pCont       = (char *) pMsg->pCont;
-  void        *pVnode;
 
   while (leftLen > 0) {
     SMsgHead *pHead = (SMsgHead *) pCont;
     pHead->vgId    = htonl(pHead->vgId);
     pHead->contLen = htonl(pHead->contLen);
 
-    pVnode = vnodeAcquireVnode(pHead->vgId);
+    taos_queue queue = vnodeAcquireRqueue(pHead->vgId);
 
-    if (pVnode == NULL) {
+    if (queue == NULL) {
       leftLen -= pHead->contLen;
       pCont -= pHead->contLen;
       continue;
     }
 
     // put message into queue
-    taos_queue queue = vnodeGetRqueue(pVnode);
     SReadMsg *pRead = (SReadMsg *)taosAllocateQitem(sizeof(SReadMsg));
     pRead->rpcMsg      = *pMsg;
     pRead->pCont       = pCont;
@@ -175,18 +173,6 @@ void dnodeFreeVnodeRqueue(void *rqueue) {
   // dynamically adjust the number of threads
 }
 
-void dnodePutItemIntoReadQueue(void *pVnode, void *qhandle) {
-  SReadMsg *pRead = (SReadMsg *)taosAllocateQitem(sizeof(SReadMsg));
-  pRead->rpcMsg.msgType = TSDB_MSG_TYPE_QUERY;
-  pRead->pCont = qhandle;
-  pRead->contLen = 0;
-
-  assert(pVnode != NULL);
-  taos_queue queue = vnodeAcquireRqueue(pVnode);
-
-  taosWriteQitem(queue, TAOS_QTYPE_QUERY, pRead);
-}
-
 void dnodeSendRpcReadRsp(void *pVnode, SReadMsg *pRead, int32_t code) {
   SRpcMsg rpcRsp = {
     .handle  = pRead->rpcMsg.handle,
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index 546e8cecb9..dc09a03e14 100644
--- a/src/dnode/src/dnodeVWrite.c
+++ b/src/dnode/src/dnodeVWrite.c
@@ -104,7 +104,7 @@ void dnodeDispatchToVnodeWriteQueue(SRpcMsg *pMsg) {
   pHead->vgId     = htonl(pHead->vgId);
   pHead->contLen  = htonl(pHead->contLen);
 
-  taos_queue queue = vnodeGetWqueue(pHead->vgId);
+  taos_queue queue = vnodeAcquireWqueue(pHead->vgId);
   if (queue) {
     // put message into queue
     SWriteMsg *pWrite = (SWriteMsg *)taosAllocateQitem(sizeof(SWriteMsg));
@@ -232,9 +232,10 @@ static void *dnodeProcessWriteQueue(void *param) {
         pHead->msgType = pWrite->rpcMsg.msgType;
         pHead->version = 0;
         pHead->len = pWrite->contLen;
-        dDebug("%p, msg:%s will be processed in vwrite queue", pWrite->rpcMsg.ahandle, taosMsg[pWrite->rpcMsg.msgType]);
+        dDebug("%p, rpc msg:%s will be processed in vwrite queue", pWrite->rpcMsg.ahandle, taosMsg[pWrite->rpcMsg.msgType]);
       } else {
         pHead = (SWalHead *)item;
+        dTrace("%p, wal msg:%s will be processed in vwrite queue, version:%" PRIu64, pHead, taosMsg[pHead->msgType], pHead->version);
       }
 
       int32_t code = vnodeProcessWrite(pVnode, type, pHead, pRspRet);
diff --git a/src/inc/dnode.h b/src/inc/dnode.h
index 096aae58f2..b561c407a3 100644
--- a/src/inc/dnode.h
+++ b/src/inc/dnode.h
@@ -53,7 +53,6 @@ void *dnodeAllocateVnodeWqueue(void *pVnode);
 void  dnodeFreeVnodeWqueue(void *queue);
 void *dnodeAllocateVnodeRqueue(void *pVnode);
 void  dnodeFreeVnodeRqueue(void *rqueue);
-void  dnodePutItemIntoReadQueue(void *pVnode, void *qhandle);
 void  dnodeSendRpcVnodeWriteRsp(void *pVnode, void *param, int32_t code);
 
 int32_t dnodeAllocateMnodePqueue();
diff --git a/src/inc/query.h b/src/inc/query.h
index c648270b21..d201b649f9 100644
--- a/src/inc/query.h
+++ b/src/inc/query.h
@@ -20,7 +20,6 @@ extern "C" {
 #endif
 
 typedef void* qinfo_t;
-typedef void (*_qinfo_free_fn_t)(void*);
 
 /**
  * create the qinfo object according to QueryTableMsg
@@ -29,13 +28,8 @@ typedef void (*_qinfo_free_fn_t)(void*);
  * @param qinfo
  * @return
  */
-int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryTableMsg, void* param, _qinfo_free_fn_t fn, qinfo_t* qinfo);
+int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryTableMsg, void* param, qinfo_t* qinfo);
 
-/**
- * Destroy QInfo object
- * @param qinfo  qhandle
- */
-void qDestroyQueryInfo(qinfo_t qinfo);
 
 /**
  * the main query execution function, including query on both table and multitables,
@@ -84,8 +78,14 @@ bool qHasMoreResultsToRetrieve(qinfo_t qinfo);
  */
 int32_t qKillQuery(qinfo_t qinfo);
 
+/**
+ * destroy query info structure
+ * @param qHandle
+ */
+void qDestroyQueryInfo(qinfo_t qHandle);
+
 void* qOpenQueryMgmt(int32_t vgId);
-void  qSetQueryMgmtClosed(void* pExecutor);
+void  qQueryMgmtNotifyClosed(void* pExecutor);
 void  qCleanupQueryMgmt(void* pExecutor);
 void** qRegisterQInfo(void* pMgmt, uint64_t qInfo);
 void** qAcquireQInfo(void* pMgmt, uint64_t key);
diff --git a/src/inc/taos.h b/src/inc/taos.h
index 1d609bc7db..d6f1883572 100644
--- a/src/inc/taos.h
+++ b/src/inc/taos.h
@@ -67,6 +67,8 @@ DLL_EXPORT void  taos_init();
 DLL_EXPORT void  taos_cleanup();
 DLL_EXPORT int   taos_options(TSDB_OPTION option, const void *arg, ...);
 DLL_EXPORT TAOS *taos_connect(const char *ip, const char *user, const char *pass, const char *db, uint16_t port);
+DLL_EXPORT TAOS *taos_connect_c(const char *ip, uint8_t ipLen, const char *user, uint8_t userLen,
+                 const char *pass, uint8_t passLen, const char *db, uint8_t dbLen, uint16_t port);
 DLL_EXPORT void  taos_close(TAOS *taos);
 
 typedef struct TAOS_BIND {
@@ -88,6 +90,7 @@ TAOS_RES * taos_stmt_use_result(TAOS_STMT *stmt);
 int        taos_stmt_close(TAOS_STMT *stmt);
 
 DLL_EXPORT TAOS_RES *taos_query(TAOS *taos, const char *sql);
+DLL_EXPORT TAOS_RES *taos_query_c(TAOS *taos, const char *sql, uint32_t sqlLen);
 DLL_EXPORT TAOS_ROW taos_fetch_row(TAOS_RES *res);
 DLL_EXPORT int taos_result_precision(TAOS_RES *res);  // get the time precision of result
 DLL_EXPORT void taos_free_result(TAOS_RES *res);
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index e4ee058cef..7696c91bdf 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -160,7 +160,32 @@ extern tDataTypeDescriptor tDataTypeDesc[11];
 #define POINTER_BYTES sizeof(void *)  // 8 by default  assert(sizeof(ptrdiff_t) == sizseof(void*)
 
 bool isValidDataType(int32_t type);
-bool isNull(const char *val, int32_t type);
+//bool isNull(const char *val, int32_t type);
+static inline __attribute__((always_inline)) bool isNull(const char *val, int32_t type) {
+  switch (type) {
+    case TSDB_DATA_TYPE_BOOL:
+      return *(uint8_t *)val == TSDB_DATA_BOOL_NULL;
+    case TSDB_DATA_TYPE_TINYINT:
+      return *(uint8_t *)val == TSDB_DATA_TINYINT_NULL;
+    case TSDB_DATA_TYPE_SMALLINT:
+      return *(uint16_t *)val == TSDB_DATA_SMALLINT_NULL;
+    case TSDB_DATA_TYPE_INT:
+      return *(uint32_t *)val == TSDB_DATA_INT_NULL;
+    case TSDB_DATA_TYPE_BIGINT:
+    case TSDB_DATA_TYPE_TIMESTAMP:
+      return *(uint64_t *)val == TSDB_DATA_BIGINT_NULL;
+    case TSDB_DATA_TYPE_FLOAT:
+      return *(uint32_t *)val == TSDB_DATA_FLOAT_NULL;
+    case TSDB_DATA_TYPE_DOUBLE:
+      return *(uint64_t *)val == TSDB_DATA_DOUBLE_NULL;
+    case TSDB_DATA_TYPE_NCHAR:
+      return *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
+    case TSDB_DATA_TYPE_BINARY:
+      return *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
+    default:
+      return false;
+  };
+}
 
 void setVardataNull(char* val, int32_t type);
 void setNull(char *val, int32_t type, int32_t bytes);
@@ -249,8 +274,8 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_DEFAULT_PAYLOAD_SIZE 5120   // default payload size, greater than PATH_MAX value
 #define TSDB_EXTRA_PAYLOAD_SIZE   128    // extra bytes for auth
 #define TSDB_CQ_SQL_SIZE          1024
-#define TSDB_MAX_VNODES           256
-#define TSDB_MIN_VNODES           50
+#define TSDB_MAX_VNODES           2048
+#define TSDB_MIN_VNODES           256
 #define TSDB_INVALID_VNODE_NUM    0
 
 #define TSDB_DNODE_ROLE_ANY       0
@@ -271,8 +296,9 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_DEFAULT_TOTAL_BLOCKS       4
 
 #define TSDB_MIN_TABLES                 4
-#define TSDB_MAX_TABLES                 200000
-#define TSDB_DEFAULT_TABLES             1000
+#define TSDB_MAX_TABLES                 10000000
+#define TSDB_DEFAULT_TABLES             1000000
+#define TSDB_TABLES_STEP                1000
 
 #define TSDB_MIN_DAYS_PER_FILE          1
 #define TSDB_MAX_DAYS_PER_FILE          3650 
@@ -306,9 +332,13 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_MAX_WAL_LEVEL              2
 #define TSDB_DEFAULT_WAL_LEVEL          1
 
-#define TSDB_MIN_REPLICA_NUM            1
-#define TSDB_MAX_REPLICA_NUM            3
-#define TSDB_DEFAULT_REPLICA_NUM        1
+#define TSDB_MIN_FSYNC_PERIOD           0
+#define TSDB_MAX_FSYNC_PERIOD           180000   // millisecond
+#define TSDB_DEFAULT_FSYNC_PERIOD       3000     // three second
+
+#define TSDB_MIN_DB_REPLICA_OPTION      1
+#define TSDB_MAX_DB_REPLICA_OPTION      3
+#define TSDB_DEFAULT_DB_REPLICA_OPTION  1
 
 #define TSDB_MAX_JOIN_TABLE_NUM         5
 #define TSDB_MAX_UNION_CLAUSE           5
diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index d2bef9ea57..3503e39d31 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -200,6 +200,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_TDB_INVALID_CREATE_TB_MSG,    0, 0x060E, "tsdb inval
 TAOS_DEFINE_ERROR(TSDB_CODE_TDB_NO_TABLE_DATA_IN_MEM,     0, 0x060F, "tsdb no table data in memory skiplist")
 TAOS_DEFINE_ERROR(TSDB_CODE_TDB_FILE_ALREADY_EXISTS,      0, 0x0610, "tsdb file already exists")
 TAOS_DEFINE_ERROR(TSDB_CODE_TDB_TABLE_RECONFIGURE,        0, 0x0611, "tsdb need to reconfigure table")
+TAOS_DEFINE_ERROR(TSDB_CODE_TDB_IVD_CREATE_TABLE_INFO,    0, 0x0612, "tsdb create table information")
 
 // query
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_INVALID_QHANDLE,          0, 0x0700, "query invalid handle")
@@ -208,6 +209,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_QRY_NO_DISKSPACE,             0, 0x0702, "query no d
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_OUT_OF_MEMORY,            0, 0x0703, "query out of memory")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_APP_ERROR,                0, 0x0704, "query app error")
 TAOS_DEFINE_ERROR(TSDB_CODE_QRY_DUP_JOIN_KEY,             0, 0x0705, "query duplicated join key")
+TAOS_DEFINE_ERROR(TSDB_CODE_QRY_EXCEED_TAGS_LIMIT,        0, 0x0706, "query tag conditon too many")
 
 // grant
 TAOS_DEFINE_ERROR(TSDB_CODE_GRANT_EXPIRED,                0, 0x0800, "grant expired")
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index ac89d1dabb..b7afaf1e06 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -58,7 +58,7 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MD_DROP_VNODE, "drop-vnode" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MD_DROP_STABLE, "drop-stable" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MD_ALTER_STREAM, "alter-stream" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MD_CONFIG_DNODE, "config-dnode" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY4, "dummy4" )
+TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MD_ALTER_VNODE, "alter-vnode" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY5, "dummy5" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY6, "dummy6" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY7, "dummy7" )
@@ -515,6 +515,7 @@ typedef struct {
   int32_t  minRowsPerFileBlock;
   int32_t  maxRowsPerFileBlock;
   int32_t  commitTime;
+  int32_t  fsyncPeriod;
   uint8_t  precision;   // time resolution
   int8_t   compression;
   int8_t   walLevel;
@@ -562,9 +563,12 @@ typedef struct {
 
 typedef struct {
   int32_t  numOfMnodes;               // tsNumOfMnodes
+  int32_t  enableBalance;             // tsEnableBalance
   int32_t  mnodeEqualVnodeNum;        // tsMnodeEqualVnodeNum
   int32_t  offlineThreshold;          // tsOfflineThreshold
   int32_t  statusInterval;            // tsStatusInterval
+  int32_t  maxtablesPerVnode;
+  int32_t  maxVgroupsPerDb;
   char     arbitrator[TSDB_EP_LEN];   // tsArbitrator
   char     timezone[64];              // tsTimezone
   char     locale[TSDB_LOCALE_LEN];   // tsLocale
@@ -606,6 +610,7 @@ typedef struct {
   int32_t  minRowsPerFileBlock;
   int32_t  maxRowsPerFileBlock;
   int32_t  commitTime;
+  int32_t  fsyncPeriod;
   int8_t   precision;
   int8_t   compression;
   int8_t   walLevel;
@@ -624,7 +629,7 @@ typedef struct {
   char db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
   SMDVnodeCfg  cfg;
   SMDVnodeDesc nodes[TSDB_MAX_REPLICA];
-} SMDCreateVnodeMsg;
+} SMDCreateVnodeMsg, SMDAlterVnodeMsg;
 
 typedef struct {
   char    tableId[TSDB_TABLE_ID_LEN];
@@ -644,7 +649,7 @@ typedef struct SCMSTableVgroupMsg {
 typedef struct {
   int32_t   vgId;
   int8_t    numOfIps;
-  SIpAddr   ipAddr[TSDB_MAX_REPLICA_NUM];
+  SIpAddr   ipAddr[TSDB_MAX_REPLICA];
 } SCMVgroupInfo;
 
 typedef struct {
diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index b8cc1768e8..a1e87a7437 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -117,7 +117,6 @@ int   tsdbCreateTable(TSDB_REPO_T *repo, STableCfg *pCfg);
 int   tsdbDropTable(TSDB_REPO_T *pRepo, STableId tableId);
 int   tsdbUpdateTableTagValue(TSDB_REPO_T *repo, SUpdateTableTagValMsg *pMsg);
 TSKEY tsdbGetTableLastKey(TSDB_REPO_T *repo, uint64_t uid);
-void  tsdbStartStream(TSDB_REPO_T *repo);
 
 uint32_t tsdbGetFileInfo(TSDB_REPO_T *repo, char *name, uint32_t *index, uint32_t eindex, int32_t *size);
 
diff --git a/src/inc/tsync.h b/src/inc/tsync.h
index 972db294f6..65b91d87e4 100644
--- a/src/inc/tsync.h
+++ b/src/inc/tsync.h
@@ -79,7 +79,7 @@ typedef void     (*FConfirmForward)(void *ahandle, void *mhandle, int32_t code);
 typedef void     (*FNotifyRole)(void *ahandle, int8_t role);
 
 // when data file is synced successfully, notity app
-typedef void     (*FNotifyFileSynced)(void *ahandle, uint64_t fversion);
+typedef int      (*FNotifyFileSynced)(void *ahandle, uint64_t fversion);
 
 typedef struct {
   int32_t    vgId;      // vgroup ID
diff --git a/src/inc/ttokendef.h b/src/inc/ttokendef.h
index b313d6ebb1..0b63e9e71d 100644
--- a/src/inc/ttokendef.h
+++ b/src/inc/ttokendef.h
@@ -110,117 +110,117 @@
 #define TK_BLOCKS                          92
 #define TK_CTIME                           93
 #define TK_WAL                             94
-#define TK_COMP                            95
-#define TK_PRECISION                       96
-#define TK_LP                              97
-#define TK_RP                              98
-#define TK_TAGS                            99
-#define TK_USING                          100
-#define TK_AS                             101
-#define TK_COMMA                          102
-#define TK_NULL                           103
-#define TK_SELECT                         104
-#define TK_UNION                          105
-#define TK_ALL                            106
-#define TK_FROM                           107
-#define TK_VARIABLE                       108
-#define TK_INTERVAL                       109
-#define TK_FILL                           110
-#define TK_SLIDING                        111
-#define TK_ORDER                          112
-#define TK_BY                             113
-#define TK_ASC                            114
-#define TK_DESC                           115
-#define TK_GROUP                          116
-#define TK_HAVING                         117
-#define TK_LIMIT                          118
-#define TK_OFFSET                         119
-#define TK_SLIMIT                         120
-#define TK_SOFFSET                        121
-#define TK_WHERE                          122
-#define TK_NOW                            123
-#define TK_RESET                          124
-#define TK_QUERY                          125
-#define TK_ADD                            126
-#define TK_COLUMN                         127
-#define TK_TAG                            128
-#define TK_CHANGE                         129
-#define TK_SET                            130
-#define TK_KILL                           131
-#define TK_CONNECTION                     132
-#define TK_STREAM                         133
-#define TK_COLON                          134
-#define TK_ABORT                          135
-#define TK_AFTER                          136
-#define TK_ATTACH                         137
-#define TK_BEFORE                         138
-#define TK_BEGIN                          139
-#define TK_CASCADE                        140
-#define TK_CLUSTER                        141
-#define TK_CONFLICT                       142
-#define TK_COPY                           143
-#define TK_DEFERRED                       144
-#define TK_DELIMITERS                     145
-#define TK_DETACH                         146
-#define TK_EACH                           147
-#define TK_END                            148
-#define TK_EXPLAIN                        149
-#define TK_FAIL                           150
-#define TK_FOR                            151
-#define TK_IGNORE                         152
-#define TK_IMMEDIATE                      153
-#define TK_INITIALLY                      154
-#define TK_INSTEAD                        155
-#define TK_MATCH                          156
-#define TK_KEY                            157
-#define TK_OF                             158
-#define TK_RAISE                          159
-#define TK_REPLACE                        160
-#define TK_RESTRICT                       161
-#define TK_ROW                            162
-#define TK_STATEMENT                      163
-#define TK_TRIGGER                        164
-#define TK_VIEW                           165
-#define TK_COUNT                          166
-#define TK_SUM                            167
-#define TK_AVG                            168
-#define TK_MIN                            169
-#define TK_MAX                            170
-#define TK_FIRST                          171
-#define TK_LAST                           172
-#define TK_TOP                            173
-#define TK_BOTTOM                         174
-#define TK_STDDEV                         175
-#define TK_PERCENTILE                     176
-#define TK_APERCENTILE                    177
-#define TK_LEASTSQUARES                   178
-#define TK_HISTOGRAM                      179
-#define TK_DIFF                           180
-#define TK_SPREAD                         181
-#define TK_TWA                            182
-#define TK_INTERP                         183
-#define TK_LAST_ROW                       184
-#define TK_RATE                           185
-#define TK_IRATE                          186
-#define TK_SUM_RATE                       187
-#define TK_SUM_IRATE                      188
-#define TK_AVG_RATE                       189
-#define TK_AVG_IRATE                      190
-#define TK_TBID                           191
-#define TK_SEMI                           192
-#define TK_NONE                           193
-#define TK_PREV                           194
-#define TK_LINEAR                         195
-#define TK_IMPORT                         196
-#define TK_METRIC                         197
-#define TK_TBNAME                         198
-#define TK_JOIN                           199
-#define TK_METRICS                        200
-#define TK_STABLE                         201
-#define TK_INSERT                         202
-#define TK_INTO                           203
-#define TK_VALUES                         204
-
+#define TK_FSYNC                           95
+#define TK_COMP                            96
+#define TK_PRECISION                       97
+#define TK_LP                              98
+#define TK_RP                              99
+#define TK_TAGS                           100
+#define TK_USING                          101
+#define TK_AS                             102
+#define TK_COMMA                          103
+#define TK_NULL                           104
+#define TK_SELECT                         105
+#define TK_UNION                          106
+#define TK_ALL                            107
+#define TK_FROM                           108
+#define TK_VARIABLE                       109
+#define TK_INTERVAL                       110
+#define TK_FILL                           111
+#define TK_SLIDING                        112
+#define TK_ORDER                          113
+#define TK_BY                             114
+#define TK_ASC                            115
+#define TK_DESC                           116
+#define TK_GROUP                          117
+#define TK_HAVING                         118
+#define TK_LIMIT                          119
+#define TK_OFFSET                         120
+#define TK_SLIMIT                         121
+#define TK_SOFFSET                        122
+#define TK_WHERE                          123
+#define TK_NOW                            124
+#define TK_RESET                          125
+#define TK_QUERY                          126
+#define TK_ADD                            127
+#define TK_COLUMN                         128
+#define TK_TAG                            129
+#define TK_CHANGE                         130
+#define TK_SET                            131
+#define TK_KILL                           132
+#define TK_CONNECTION                     133
+#define TK_STREAM                         134
+#define TK_COLON                          135
+#define TK_ABORT                          136
+#define TK_AFTER                          137
+#define TK_ATTACH                         138
+#define TK_BEFORE                         139
+#define TK_BEGIN                          140
+#define TK_CASCADE                        141
+#define TK_CLUSTER                        142
+#define TK_CONFLICT                       143
+#define TK_COPY                           144
+#define TK_DEFERRED                       145
+#define TK_DELIMITERS                     146
+#define TK_DETACH                         147
+#define TK_EACH                           148
+#define TK_END                            149
+#define TK_EXPLAIN                        150
+#define TK_FAIL                           151
+#define TK_FOR                            152
+#define TK_IGNORE                         153
+#define TK_IMMEDIATE                      154
+#define TK_INITIALLY                      155
+#define TK_INSTEAD                        156
+#define TK_MATCH                          157
+#define TK_KEY                            158
+#define TK_OF                             159
+#define TK_RAISE                          160
+#define TK_REPLACE                        161
+#define TK_RESTRICT                       162
+#define TK_ROW                            163
+#define TK_STATEMENT                      164
+#define TK_TRIGGER                        165
+#define TK_VIEW                           166
+#define TK_COUNT                          167
+#define TK_SUM                            168
+#define TK_AVG                            169
+#define TK_MIN                            170
+#define TK_MAX                            171
+#define TK_FIRST                          172
+#define TK_LAST                           173
+#define TK_TOP                            174
+#define TK_BOTTOM                         175
+#define TK_STDDEV                         176
+#define TK_PERCENTILE                     177
+#define TK_APERCENTILE                    178
+#define TK_LEASTSQUARES                   179
+#define TK_HISTOGRAM                      180
+#define TK_DIFF                           181
+#define TK_SPREAD                         182
+#define TK_TWA                            183
+#define TK_INTERP                         184
+#define TK_LAST_ROW                       185
+#define TK_RATE                           186
+#define TK_IRATE                          187
+#define TK_SUM_RATE                       188
+#define TK_SUM_IRATE                      189
+#define TK_AVG_RATE                       190
+#define TK_AVG_IRATE                      191
+#define TK_TBID                           192
+#define TK_SEMI                           193
+#define TK_NONE                           194
+#define TK_PREV                           195
+#define TK_LINEAR                         196
+#define TK_IMPORT                         197
+#define TK_METRIC                         198
+#define TK_TBNAME                         199
+#define TK_JOIN                           200
+#define TK_METRICS                        201
+#define TK_STABLE                         202
+#define TK_INSERT                         203
+#define TK_INTO                           204
+#define TK_VALUES                         205
 
 #define TK_SPACE                          300
 #define TK_COMMENT                        301
diff --git a/src/inc/twal.h b/src/inc/twal.h
index 8c2c3c69a1..4fdb7aa275 100644
--- a/src/inc/twal.h
+++ b/src/inc/twal.h
@@ -35,6 +35,7 @@ typedef struct {
 
 typedef struct {
   int8_t    walLevel;  // wal level
+  int32_t   fsyncPeriod; // millisecond
   int8_t    wals;      // number of WAL files;
   int8_t    keep;      // keep the wal file when closed
 } SWalCfg;
diff --git a/src/inc/vnode.h b/src/inc/vnode.h
index 1e6cfa9700..15ddb6afee 100644
--- a/src/inc/vnode.h
+++ b/src/inc/vnode.h
@@ -22,10 +22,10 @@ extern "C" {
 
 typedef enum _VN_STATUS {
   TAOS_VN_STATUS_INIT,
-  TAOS_VN_STATUS_UPDATING,
   TAOS_VN_STATUS_READY,
   TAOS_VN_STATUS_CLOSING,
-  TAOS_VN_STATUS_DELETING,
+  TAOS_VN_STATUS_UPDATING,
+  TAOS_VN_STATUS_RESET,
 } EVnStatus;
 
 typedef struct {
@@ -44,17 +44,13 @@ typedef struct {
 int32_t vnodeCreate(SMDCreateVnodeMsg *pVnodeCfg);
 int32_t vnodeDrop(int32_t vgId);
 int32_t vnodeOpen(int32_t vgId, char *rootDir);
-int32_t vnodeStartStream(int32_t vgId);
 int32_t vnodeAlter(void *pVnode, SMDCreateVnodeMsg *pVnodeCfg);
 int32_t vnodeClose(int32_t vgId);
 
-void    vnodeRelease(void *pVnode);
-void*   vnodeAcquireVnode(int32_t vgId); // add refcount
-void*   vnodeGetVnode(int32_t vgId);      // keep refcount unchanged
-
-void*   vnodeAcquireRqueue(void *);
-void*   vnodeGetRqueue(void *);
-void*   vnodeGetWqueue(int32_t vgId);
+void*   vnodeAcquire(int32_t vgId);        // add refcount
+void*   vnodeAcquireRqueue(int32_t vgId);  // add refCount, get read queue 
+void*   vnodeAcquireWqueue(int32_t vgId);  // add recCount, get write queue
+void    vnodeRelease(void *pVnode);        // dec refCount
 void*   vnodeGetWal(void *pVnode);
 
 int32_t vnodeProcessWrite(void *pVnode, int qtype, void *pHead, void *item);
diff --git a/src/kit/shell/src/shellImport.c b/src/kit/shell/src/shellImport.c
index a440db7301..afd2d85dae 100644
--- a/src/kit/shell/src/shellImport.c
+++ b/src/kit/shell/src/shellImport.c
@@ -136,7 +136,7 @@ static void shellGetDirectoryFileList(char *inputDir)
 static void shellSourceFile(TAOS *con, char *fptr) {
   wordexp_t full_path;
   int       read_len = 0;
-  char *    cmd = malloc(MAX_COMMAND_SIZE);
+  char *    cmd = malloc(tsMaxSQLStringLen);
   size_t    cmd_len = 0;
   char *    line = NULL;
   size_t    line_len = 0;
@@ -185,7 +185,7 @@ static void shellSourceFile(TAOS *con, char *fptr) {
   int lineNo = 0;
   while ((read_len = getline(&line, &line_len, f)) != -1) {
     ++lineNo;
-    if (read_len >= MAX_COMMAND_SIZE) continue;
+    if (read_len >= tsMaxSQLStringLen) continue;
     line[--read_len] = '\0';
 
     if (read_len == 0 || isCommentLine(line)) {  // line starts with #
diff --git a/src/kit/taosdump/taosdump.c b/src/kit/taosdump/taosdump.c
index 70f18b32bd..a1b1998298 100644
--- a/src/kit/taosdump/taosdump.c
+++ b/src/kit/taosdump/taosdump.c
@@ -179,8 +179,8 @@ static struct argp_option options[] = {
   {"start-time",    'S', "START_TIME",  0,  "Start time to dump.",                                         3},
   {"end-time",      'E', "END_TIME",    0,  "End time to dump.",                                           3},
   {"data-batch",    'N', "DATA_BATCH",  0,  "Number of data point per insert statement. Default is 1.",    3},
-  {"table-batch",   'T', "TABLE_BATCH", 0,  "Number of table dumpout into one output file. Default is 1.", 3},
-  {"thread_num",    't', "THREAD_NUM",  0,  "Number of thread for dump in file. Default is 5.",            3},  
+  {"table-batch",   't', "TABLE_BATCH", 0,  "Number of table dumpout into one output file. Default is 1.", 3},
+  {"thread_num",    'T', "THREAD_NUM",  0,  "Number of thread for dump in file. Default is 5.",            3},  
   {"allow-sys",     'a', 0,             0,  "Allow to dump sys database",                                  3},
   {0}};
 
@@ -304,10 +304,10 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
     case 'N':
       arguments->data_batch = atoi(arg);
       break;
-    case 'T':
+    case 't':
       arguments->table_batch = atoi(arg);
       break;
-    case 't':
+    case 'T':
       arguments->thread_num = atoi(arg);
       break;
     case OPT_ABORT:
@@ -406,7 +406,7 @@ int main(int argc, char *argv[]) {
     printf("password: %s\n", tsArguments.password);
     printf("port: %u\n", tsArguments.port);
     printf("cversion: %s\n", tsArguments.cversion);    
-    printf("mysqlFlag: %d", tsArguments.mysqlFlag);    
+    printf("mysqlFlag: %d\n", tsArguments.mysqlFlag);    
     printf("outpath: %s\n", tsArguments.outpath);
     printf("inpath: %s\n", tsArguments.inpath);
     printf("encode: %s\n", tsArguments.encode);
@@ -821,7 +821,7 @@ _exit_failure:
   return -1;
 }
 
-int taosGetTableDes(char *table, STableDef *tableDes, TAOS* taosCon) {
+int taosGetTableDes(char *table, STableDef *tableDes, TAOS* taosCon, bool isSuperTable) {
   TAOS_ROW row = NULL;
   TAOS_RES *tmpResult = NULL;
   int count = 0;
@@ -832,6 +832,13 @@ int taosGetTableDes(char *table, STableDef *tableDes, TAOS* taosCon) {
     return -1;
   }
 
+  char* tbuf = (char *)malloc(COMMAND_SIZE);
+  if (tbuf == NULL) {
+    fprintf(stderr, "failed to allocate memory\n");
+    free(tempCommand);
+    return -1;
+  }
+
   sprintf(tempCommand, "describe %s", table);
   
   tmpResult = taos_query(taosCon, tempCommand);  
@@ -862,6 +869,92 @@ int taosGetTableDes(char *table, STableDef *tableDes, TAOS* taosCon) {
   taos_free_result(tmpResult);
   tmpResult = NULL;
 
+  if (isSuperTable) {
+    free(tempCommand);
+    return count;
+  }
+  
+  // if chidl-table have tag, using  select tagName from table to get tagValue
+  for (int i = 0 ; i < count; i++) {
+    if (strcmp(tableDes->cols[i].note, "TAG") != 0) continue;
+
+
+    sprintf(tempCommand, "select %s from %s", tableDes->cols[i].field, table);
+    
+    tmpResult = taos_query(taosCon, tempCommand);  
+    code = taos_errno(tmpResult);
+    if (code != 0) {
+      fprintf(stderr, "failed to run command %s\n", tempCommand);
+      free(tempCommand);
+      taos_free_result(tmpResult);
+      return -1;
+    }
+    
+    fields = taos_fetch_fields(tmpResult); 
+
+    row = taos_fetch_row(tmpResult);
+    if (NULL == row) {
+      fprintf(stderr, " fetch failed to run command %s\n", tempCommand);
+      free(tempCommand);
+      taos_free_result(tmpResult);
+      return -1;
+    }
+  
+    switch (fields[0].type) {
+      case TSDB_DATA_TYPE_BOOL:
+        sprintf(tableDes->cols[i].note, "%d", ((((int)(*((char *)row[0]))) == 1) ? 1 : 0));
+        break;
+      case TSDB_DATA_TYPE_TINYINT:
+        sprintf(tableDes->cols[i].note, "%d", (int)(*((char *)row[0])));
+        break;
+      case TSDB_DATA_TYPE_SMALLINT:
+        sprintf(tableDes->cols[i].note, "%d", (int)(*((short *)row[0])));
+        break;
+      case TSDB_DATA_TYPE_INT:
+        sprintf(tableDes->cols[i].note, "%d", *((int *)row[0]));
+        break;
+      case TSDB_DATA_TYPE_BIGINT:
+        sprintf(tableDes->cols[i].note, "%" PRId64 "", *((int64_t *)row[0]));
+        break;
+      case TSDB_DATA_TYPE_FLOAT:
+        sprintf(tableDes->cols[i].note, "%f", GET_FLOAT_VAL(row[0]));
+        break;
+      case TSDB_DATA_TYPE_DOUBLE:
+        sprintf(tableDes->cols[i].note, "%f", GET_DOUBLE_VAL(row[0]));
+        break;
+      case TSDB_DATA_TYPE_BINARY:
+        tableDes->cols[i].note[0] = '\'';
+        converStringToReadable((char *)row[0], fields[0].bytes, tbuf, COMMAND_SIZE);
+        char* pstr = stpcpy(&(tableDes->cols[i].note[1]), tbuf);
+        *(pstr++) = '\'';
+        break;
+      case TSDB_DATA_TYPE_NCHAR:
+        convertNCharToReadable((char *)row[0], fields[0].bytes, tbuf, COMMAND_SIZE);
+        sprintf(tableDes->cols[i].note, "\'%s\'", tbuf);
+        break;
+      case TSDB_DATA_TYPE_TIMESTAMP:
+        sprintf(tableDes->cols[i].note, "%" PRId64 "", *(int64_t *)row[0]);
+        #if 0
+        if (!arguments->mysqlFlag) {
+          sprintf(tableDes->cols[i].note, "%" PRId64 "", *(int64_t *)row[0]);
+        } else {
+          char buf[64] = "\0";
+          int64_t ts = *((int64_t *)row[0]);
+          time_t tt = (time_t)(ts / 1000);
+          struct tm *ptm = localtime(&tt);
+          strftime(buf, 64, "%y-%m-%d %H:%M:%S", ptm);
+          sprintf(tableDes->cols[i].note, "\'%s.%03d\'", buf, (int)(ts % 1000));
+        }
+        #endif
+        break;
+      default:
+        break;
+    }
+  
+    taos_free_result(tmpResult);
+    tmpResult = NULL;    
+  }
+
   free(tempCommand);
 
   return count;
@@ -886,23 +979,25 @@ int32_t taosDumpTable(char *table, char *metric, struct arguments *arguments, FI
     memset(tableDes, 0, sizeof(STableDef) + sizeof(SColDes) * TSDB_MAX_COLUMNS);
     */
 
-    count = taosGetTableDes(table, tableDes, taosCon);
+    count = taosGetTableDes(table, tableDes, taosCon, false);
 
     if (count < 0) {
       free(tableDes);
       return -1;
     }
 
+    // create child-table using super-table
     taosDumpCreateMTableClause(tableDes, metric, count, fp);
 
   } else {  // dump table definition
-    count = taosGetTableDes(table, tableDes, taosCon);
+    count = taosGetTableDes(table, tableDes, taosCon, false);
 
     if (count < 0) {
       free(tableDes);
       return -1;
     }
 
+    // create normal-table or super-table
     taosDumpCreateTableClause(tableDes, count, fp);
   }
 
@@ -1033,7 +1128,7 @@ int32_t taosDumpStable(char *table, FILE *fp, TAOS* taosCon) {
     exit(-1);
   }
 
-  count = taosGetTableDes(table, tableDes, taosCon);
+  count = taosGetTableDes(table, tableDes, taosCon, true);
 
   if (count < 0) {
     free(tableDes);
@@ -1083,7 +1178,6 @@ int32_t taosDumpCreateSuperTableClause(TAOS* taosCon, char* dbName, FILE *fp)
     taos_free_result(tmpResult);
     exit(-1);
   }
-  taos_free_result(tmpResult);
 
   TAOS_FIELD *fields = taos_fetch_fields(tmpResult);
 
@@ -1291,14 +1385,16 @@ void taosDumpCreateMTableClause(STableDef *tableDes, char *metric, int numOfCols
     if (counter != count_temp) {
       if (strcasecmp(tableDes->cols[counter].type, "binary") == 0 ||
           strcasecmp(tableDes->cols[counter].type, "nchar") == 0) {
-        pstr += sprintf(pstr, ", \'%s\'", tableDes->cols[counter].note);
+        //pstr += sprintf(pstr, ", \'%s\'", tableDes->cols[counter].note);
+        pstr += sprintf(pstr, ", %s", tableDes->cols[counter].note);
       } else {
         pstr += sprintf(pstr, ", %s", tableDes->cols[counter].note);
       }
     } else {
       if (strcasecmp(tableDes->cols[counter].type, "binary") == 0 ||
           strcasecmp(tableDes->cols[counter].type, "nchar") == 0) {
-        pstr += sprintf(pstr, "\'%s\'", tableDes->cols[counter].note);
+        //pstr += sprintf(pstr, "\'%s\'", tableDes->cols[counter].note);
+        pstr += sprintf(pstr, "%s", tableDes->cols[counter].note);
       } else {
         pstr += sprintf(pstr, "%s", tableDes->cols[counter].note);
       }
@@ -1363,7 +1459,7 @@ int taosDumpTableData(FILE *fp, char *tbname, struct arguments *arguments, TAOS*
     return -1;
   }
 
-  numFields = taos_field_count(taosCon);
+  numFields = taos_field_count(tmpResult);
   assert(numFields > 0);
   TAOS_FIELD *fields = taos_fetch_fields(tmpResult);
   tbuf = (char *)malloc(COMMAND_SIZE);
@@ -2015,6 +2111,7 @@ int taosDumpInOneFile(TAOS     * taos, FILE* fp, char* fcharset, char* encode, c
     }
 
     memcpy(cmd + cmd_len, line, read_len);
+    cmd[read_len + cmd_len]= '\0';
     if (queryDB(taos, cmd)) {
       fprintf(stderr, "error sql: linenu:%d, file:%s\n", lineNo, fileName);
     }
diff --git a/src/kit/taosmigrate/taosmigrateVnodeCfg.c b/src/kit/taosmigrate/taosmigrateVnodeCfg.c
index b925fb10aa..e830ef78f5 100644
--- a/src/kit/taosmigrate/taosmigrateVnodeCfg.c
+++ b/src/kit/taosmigrate/taosmigrateVnodeCfg.c
@@ -48,6 +48,7 @@ static int32_t saveVnodeCfg(SVnodeObj *pVnode, char* cfgFile)
   len += snprintf(content + len, maxLen - len, "  \"precision\": %d,\n", pVnode->tsdbCfg.precision);
   len += snprintf(content + len, maxLen - len, "  \"compression\": %d,\n", pVnode->tsdbCfg.compression);
   len += snprintf(content + len, maxLen - len, "  \"walLevel\": %d,\n", pVnode->walCfg.walLevel);
+  len += snprintf(content + len, maxLen - len, "  \"fsync\": %d,\n", pVnode->walCfg.fsyncPeriod);
   len += snprintf(content + len, maxLen - len, "  \"replica\": %d,\n", pVnode->syncCfg.replica);
   len += snprintf(content + len, maxLen - len, "  \"wals\": %d,\n", pVnode->walCfg.wals);
   len += snprintf(content + len, maxLen - len, "  \"quorum\": %d,\n", pVnode->syncCfg.quorum);
@@ -212,6 +213,13 @@ static int32_t readVnodeCfg(SVnodeObj *pVnode, char* cfgFile)
   }
   pVnode->walCfg.walLevel = (int8_t) walLevel->valueint;
 
+  cJSON *fsyncPeriod = cJSON_GetObjectItem(root, "fsync");
+  if (!fsyncPeriod || fsyncPeriod->type != cJSON_Number) {
+    printf("vgId:%d, failed to read vnode cfg, fsyncPeriod not found\n", pVnode->vgId);
+    goto PARSE_OVER;
+  }
+  pVnode->walCfg.fsyncPeriod = fsyncPeriod->valueint;
+
   cJSON *wals = cJSON_GetObjectItem(root, "wals");
   if (!wals || wals->type != cJSON_Number) {
     printf("vgId:%d, failed to read vnode cfg, wals not found\n", pVnode->vgId);
diff --git a/src/mnode/inc/mnodeDb.h b/src/mnode/inc/mnodeDb.h
index c8557af166..ca6c2a86a2 100644
--- a/src/mnode/inc/mnodeDb.h
+++ b/src/mnode/inc/mnodeDb.h
@@ -44,10 +44,7 @@ void mnodeRemoveSuperTableFromDb(SDbObj *pDb);
 void mnodeAddTableIntoDb(SDbObj *pDb);
 void mnodeRemoveTableFromDb(SDbObj *pDb);
 void mnodeAddVgroupIntoDb(SVgObj *pVgroup);
-void mnodeAddVgroupIntoDbTail(SVgObj *pVgroup);
 void mnodeRemoveVgroupFromDb(SVgObj *pVgroup);
-void mnodeMoveVgroupToTail(SVgObj *pVgroup);
-void mnodeMoveVgroupToHead(SVgObj *pVgroup);
 
 #ifdef __cplusplus
 }
diff --git a/src/mnode/inc/mnodeDef.h b/src/mnode/inc/mnodeDef.h
index b40080759f..b7489a9fc5 100644
--- a/src/mnode/inc/mnodeDef.h
+++ b/src/mnode/inc/mnodeDef.h
@@ -145,10 +145,8 @@ typedef struct SVgObj {
   int64_t        totalStorage;
   int64_t        compStorage;
   int64_t        pointsWritten;
-  struct SVgObj *prev, *next;
   struct SDbObj *pDb;
   void *         idPool;
-  SChildTableObj **tableList;
 } SVgObj;
 
 typedef struct {
@@ -162,6 +160,7 @@ typedef struct {
   int32_t minRowsPerFileBlock;
   int32_t maxRowsPerFileBlock;
   int32_t commitTime;
+  int32_t fsyncPeriod;
   int8_t  precision;
   int8_t  compression;
   int8_t  walLevel;
@@ -183,9 +182,11 @@ typedef struct SDbObj {
   int32_t numOfVgroups;
   int32_t numOfTables;
   int32_t numOfSuperTables;
-  SVgObj *pHead;
-  SVgObj *pTail;
+  int32_t vgListSize; 
+  int32_t vgListIndex;
+  SVgObj **vgList;
   struct SAcctObj *pAcct;
+  pthread_mutex_t  mutex;
 } SDbObj;
 
 typedef struct SUserObj {
@@ -246,7 +247,8 @@ typedef struct {
   int16_t  offset[TSDB_MAX_COLUMNS];
   int16_t  bytes[TSDB_MAX_COLUMNS];
   int32_t  numOfReads;
-  int8_t   reserved0[2];
+  int8_t   maxReplica;
+  int8_t   reserved0[0];
   uint16_t payloadLen;
   char     payload[];
 } SShowObj;
diff --git a/src/mnode/inc/mnodeDnode.h b/src/mnode/inc/mnodeDnode.h
index 9e21f8f56a..f371786524 100644
--- a/src/mnode/inc/mnodeDnode.h
+++ b/src/mnode/inc/mnodeDnode.h
@@ -40,6 +40,7 @@ char*   mnodeGetDnodeStatusStr(int32_t dnodeStatus);
 void    mgmtMonitorDnodeModule();
 
 int32_t mnodeGetDnodesNum();
+int32_t mnodeGetOnlinDnodesCpuCoreNum();
 int32_t mnodeGetOnlinDnodesNum();
 void *  mnodeGetNextDnode(void *pIter, SDnodeObj **pDnode);
 void    mnodeIncDnodeRef(SDnodeObj *pDnode);
diff --git a/src/mnode/inc/mnodeInt.h b/src/mnode/inc/mnodeInt.h
index a450a8027f..44626fd167 100644
--- a/src/mnode/inc/mnodeInt.h
+++ b/src/mnode/inc/mnodeInt.h
@@ -29,17 +29,17 @@ extern int32_t sdbDebugFlag;
 // mnode log function
 #define mFatal(...) { if (mDebugFlag & DEBUG_FATAL) { taosPrintLog("MND FATAL ", 255, __VA_ARGS__); }}
 #define mError(...) { if (mDebugFlag & DEBUG_ERROR) { taosPrintLog("MND ERROR ", 255, __VA_ARGS__); }}
-#define mWarn(...)  { if (mDebugFlag & DEBUG_WARN)  { taosPrintLog("MND WARN  ", 255, __VA_ARGS__); }}
-#define mInfo(...)  { if (mDebugFlag & DEBUG_INFO)  { taosPrintLog("MND INFO  ", 255, __VA_ARGS__); }}
-#define mDebug(...) { if (mDebugFlag & DEBUG_DEBUG) { taosPrintLog("MND DEBUG ", mDebugFlag, __VA_ARGS__); }}
-#define mTrace(...) { if (mDebugFlag & DEBUG_TRACE) { taosPrintLog("MND TRACE ", mDebugFlag, __VA_ARGS__); }}
+#define mWarn(...)  { if (mDebugFlag & DEBUG_WARN)  { taosPrintLog("MND WARN ", 255, __VA_ARGS__); }}
+#define mInfo(...)  { if (mDebugFlag & DEBUG_INFO)  { taosPrintLog("MND ", 255, __VA_ARGS__); }}
+#define mDebug(...) { if (mDebugFlag & DEBUG_DEBUG) { taosPrintLog("MND ", mDebugFlag, __VA_ARGS__); }}
+#define mTrace(...) { if (mDebugFlag & DEBUG_TRACE) { taosPrintLog("MND ", mDebugFlag, __VA_ARGS__); }}
 
 #define sdbFatal(...) { if (sdbDebugFlag & DEBUG_FATAL) { taosPrintLog("SDB FATAL ", 255, __VA_ARGS__); }}
 #define sdbError(...) { if (sdbDebugFlag & DEBUG_ERROR) { taosPrintLog("SDB ERROR ", 255, __VA_ARGS__); }}
-#define sdbWarn(...)  { if (sdbDebugFlag & DEBUG_WARN)  { taosPrintLog("SDB WARN  ", 255, __VA_ARGS__); }}
-#define sdbInfo(...)  { if (sdbDebugFlag & DEBUG_INFO)  { taosPrintLog("SDB INFO  ", 255, __VA_ARGS__); }}
-#define sdbDebug(...) { if (sdbDebugFlag & DEBUG_DEBUG) { taosPrintLog("SDB DEBUG ", sdbDebugFlag, __VA_ARGS__); }}
-#define sdbTrace(...) { if (sdbDebugFlag & DEBUG_TRACE) { taosPrintLog("SDB TRACE ", sdbDebugFlag, __VA_ARGS__); }}
+#define sdbWarn(...)  { if (sdbDebugFlag & DEBUG_WARN)  { taosPrintLog("SDB WARN ", 255, __VA_ARGS__); }}
+#define sdbInfo(...)  { if (sdbDebugFlag & DEBUG_INFO)  { taosPrintLog("SDB ", 255, __VA_ARGS__); }}
+#define sdbDebug(...) { if (sdbDebugFlag & DEBUG_DEBUG) { taosPrintLog("SDB ", sdbDebugFlag, __VA_ARGS__); }}
+#define sdbTrace(...) { if (sdbDebugFlag & DEBUG_TRACE) { taosPrintLog("SDB ", sdbDebugFlag, __VA_ARGS__); }}
 
 #define mLError(...) { monitorSaveLog(2, __VA_ARGS__); mError(__VA_ARGS__) }
 #define mLWarn(...)  { monitorSaveLog(1, __VA_ARGS__); mWarn(__VA_ARGS__)  }
diff --git a/src/mnode/inc/mnodeSdb.h b/src/mnode/inc/mnodeSdb.h
index eec6d45e23..0c47f684f8 100644
--- a/src/mnode/inc/mnodeSdb.h
+++ b/src/mnode/inc/mnodeSdb.h
@@ -94,6 +94,7 @@ void     sdbDecRef(void *thandle, void *pRow);
 int64_t  sdbGetNumOfRows(void *handle);
 int32_t  sdbGetId(void *handle);
 uint64_t sdbGetVersion();
+bool     sdbCheckRowDeleted(void *thandle, void *pRow);
 
 #ifdef __cplusplus
 }
diff --git a/src/mnode/inc/mnodeVgroup.h b/src/mnode/inc/mnodeVgroup.h
index 29a0fe1799..3f1da89605 100644
--- a/src/mnode/inc/mnodeVgroup.h
+++ b/src/mnode/inc/mnodeVgroup.h
@@ -30,23 +30,23 @@ void    mnodeDecVgroupRef(SVgObj *pVgroup);
 void    mnodeDropAllDbVgroups(SDbObj *pDropDb);
 void    mnodeSendDropAllDbVgroupsMsg(SDbObj *pDropDb);
 void    mnodeDropAllDnodeVgroups(SDnodeObj *pDropDnode);
-void    mnodeUpdateAllDbVgroups(SDbObj *pAlterDb);
+//void  mnodeUpdateAllDbVgroups(SDbObj *pAlterDb);
 
 void *  mnodeGetNextVgroup(void *pIter, SVgObj **pVgroup);
 void    mnodeUpdateVgroup(SVgObj *pVgroup);
 void    mnodeUpdateVgroupStatus(SVgObj *pVgroup, SDnodeObj *pDnode, SVnodeLoad *pVload);
 void    mnodeCheckUnCreatedVgroup(SDnodeObj *pDnode, SVnodeLoad *pVloads, int32_t openVnodes);
 
-int32_t mnodeCreateVgroup(struct SMnodeMsg *pMsg, SDbObj *pDb);
+int32_t mnodeCreateVgroup(struct SMnodeMsg *pMsg);
 void    mnodeDropVgroup(SVgObj *pVgroup, void *ahandle);
 void    mnodeAlterVgroup(SVgObj *pVgroup, void *ahandle);
-SVgObj *mnodeGetAvailableVgroup(SDbObj *pDb);
+int32_t mnodeGetAvailableVgroup(struct SMnodeMsg *pMsg, SVgObj **pVgroup, int32_t *sid);
 
 void    mnodeAddTableIntoVgroup(SVgObj *pVgroup, SChildTableObj *pTable);
 void    mnodeRemoveTableFromVgroup(SVgObj *pVgroup, SChildTableObj *pTable);
-void    mnodeSendCreateVnodeMsg(SVgObj *pVgroup, SRpcIpSet *ipSet, void *ahandle);
 void    mnodeSendDropVnodeMsg(int32_t vgId, SRpcIpSet *ipSet, void *ahandle);
 void    mnodeSendCreateVgroupMsg(SVgObj *pVgroup, void *ahandle);
+void    mnodeSendAlterVgroupMsg(SVgObj *pVgroup);
 
 SRpcIpSet mnodeGetIpSetFromVgroup(SVgObj *pVgroup);
 SRpcIpSet mnodeGetIpSetFromIp(char *ep);
diff --git a/src/mnode/src/mnodeDb.c b/src/mnode/src/mnodeDb.c
index 8c74c9413d..fb97d6f380 100644
--- a/src/mnode/src/mnodeDb.c
+++ b/src/mnode/src/mnodeDb.c
@@ -38,6 +38,7 @@
 #include "mnodeUser.h"
 #include "mnodeVgroup.h"
 
+#define VG_LIST_SIZE 8
 static void *  tsDbSdb = NULL;
 static int32_t tsDbUpdateSize;
 
@@ -50,8 +51,14 @@ static int32_t mnodeProcessCreateDbMsg(SMnodeMsg *pMsg);
 static int32_t mnodeProcessAlterDbMsg(SMnodeMsg *pMsg);
 static int32_t mnodeProcessDropDbMsg(SMnodeMsg *pMsg);
 
+static void mnodeDestroyDb(SDbObj *pDb) {
+  pthread_mutex_destroy(&pDb->mutex);
+  tfree(pDb->vgList);
+  tfree(pDb);
+}
+
 static int32_t mnodeDbActionDestroy(SSdbOper *pOper) {
-  tfree(pOper->pObj);
+  mnodeDestroyDb(pOper->pObj);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -59,8 +66,9 @@ static int32_t mnodeDbActionInsert(SSdbOper *pOper) {
   SDbObj *pDb = pOper->pObj;
   SAcctObj *pAcct = mnodeGetAcct(pDb->acct);
 
-  pDb->pHead = NULL;
-  pDb->pTail = NULL;
+  pthread_mutex_init(&pDb->mutex, NULL);
+  pDb->vgListSize = VG_LIST_SIZE;
+  pDb->vgList = calloc(pDb->vgListSize, sizeof(SVgObj *));
   pDb->numOfVgroups = 0;
   pDb->numOfTables = 0;
   pDb->numOfSuperTables = 0;
@@ -94,14 +102,15 @@ static int32_t mnodeDbActionDelete(SSdbOper *pOper) {
 }
 
 static int32_t mnodeDbActionUpdate(SSdbOper *pOper) {
-  SDbObj *pDb = pOper->pObj;
-  SDbObj *pSaved = mnodeGetDb(pDb->name);
-  if (pDb != pSaved) {
-    memcpy(pSaved, pDb, pOper->rowSize);
-    free(pDb);
+  SDbObj *pNew = pOper->pObj;
+  SDbObj *pDb = mnodeGetDb(pNew->name);
+  if (pDb != NULL && pNew != pDb) {
+    memcpy(pDb, pNew, pOper->rowSize);
+    free(pNew->vgList);
+    free(pNew);
   }
-  mnodeUpdateAllDbVgroups(pSaved);
-  mnodeDecDbRef(pSaved);
+  //mnodeUpdateAllDbVgroups(pDb);
+  mnodeDecDbRef(pDb);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -278,14 +287,14 @@ static int32_t mnodeCheckDbCfg(SDbCfg *pCfg) {
     return TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
-  if (pCfg->replications < TSDB_MIN_REPLICA_NUM || pCfg->replications > TSDB_MAX_REPLICA_NUM) {
-    mError("invalid db option replications:%d valid range: [%d, %d]", pCfg->replications, TSDB_MIN_REPLICA_NUM,
-           TSDB_MAX_REPLICA_NUM);
+  if (pCfg->fsyncPeriod < TSDB_MIN_FSYNC_PERIOD || pCfg->fsyncPeriod > TSDB_MAX_FSYNC_PERIOD) {
+    mError("invalid db option fsyncPeriod:%d, valid range: [%d, %d]", pCfg->fsyncPeriod, TSDB_MIN_FSYNC_PERIOD, TSDB_MAX_FSYNC_PERIOD);
     return TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
-  if (pCfg->walLevel < TSDB_MIN_WAL_LEVEL) {
-    mError("invalid db option walLevel:%d must be greater than 0", pCfg->walLevel);
+  if (pCfg->replications < TSDB_MIN_DB_REPLICA_OPTION || pCfg->replications > TSDB_MAX_DB_REPLICA_OPTION) {
+    mError("invalid db option replications:%d valid range: [%d, %d]", pCfg->replications, TSDB_MIN_DB_REPLICA_OPTION,
+           TSDB_MAX_DB_REPLICA_OPTION);
     return TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
@@ -309,6 +318,7 @@ static void mnodeSetDefaultDbCfg(SDbCfg *pCfg) {
   if (pCfg->daysToKeep2 < 0) pCfg->daysToKeep2 = pCfg->daysToKeep;
   if (pCfg->minRowsPerFileBlock < 0) pCfg->minRowsPerFileBlock = tsMinRowsInFileBlock;
   if (pCfg->maxRowsPerFileBlock < 0) pCfg->maxRowsPerFileBlock = tsMaxRowsInFileBlock;
+  if (pCfg->fsyncPeriod <0) pCfg->fsyncPeriod = tsFsyncPeriod;
   if (pCfg->commitTime < 0) pCfg->commitTime = tsCommitTime;
   if (pCfg->precision < 0) pCfg->precision = tsTimePrecision;
   if (pCfg->compression < 0) pCfg->compression = tsCompression;
@@ -358,6 +368,7 @@ static int32_t mnodeCreateDb(SAcctObj *pAcct, SCMCreateDbMsg *pCreate, void *pMs
     .daysToKeep2         = pCreate->daysToKeep2,
     .minRowsPerFileBlock = pCreate->minRowsPerFileBlock,
     .maxRowsPerFileBlock = pCreate->maxRowsPerFileBlock,
+    .fsyncPeriod         = pCreate->fsyncPeriod,
     .commitTime          = pCreate->commitTime,
     .precision           = pCreate->precision,
     .compression         = pCreate->compression,
@@ -384,7 +395,7 @@ static int32_t mnodeCreateDb(SAcctObj *pAcct, SCMCreateDbMsg *pCreate, void *pMs
 
   code = sdbInsertRow(&oper);
   if (code != TSDB_CODE_SUCCESS) {
-    tfree(pDb);
+    mnodeDestroyDb(pDb);
     mLInfo("db:%s, failed to create, reason:%s", pDb->name, tstrerror(code));
     return code;
   } else {
@@ -421,45 +432,33 @@ void mnodePrintVgroups(SDbObj *pDb, char *oper) {
 void mnodeAddVgroupIntoDb(SVgObj *pVgroup) {
   SDbObj *pDb = pVgroup->pDb;
 
-  pVgroup->next = pDb->pHead;
-  pVgroup->prev = NULL;
+  pthread_mutex_lock(&pDb->mutex);
+  int32_t vgPos = pDb->numOfVgroups++;
+  if (vgPos >= pDb->vgListSize) {
+    pDb->vgList = realloc(pDb->vgList, pDb->vgListSize * 2 * sizeof(SVgObj *));
+    memset(pDb->vgList + pDb->vgListSize, 0, pDb->vgListSize * sizeof(SVgObj *));
+    pDb->vgListSize *= 2;
+  }
 
-  if (pDb->pHead) pDb->pHead->prev = pVgroup;
-  if (pDb->pTail == NULL) pDb->pTail = pVgroup;
-
-  pDb->pHead = pVgroup;
-  pDb->numOfVgroups++;
-}
-
-void mnodeAddVgroupIntoDbTail(SVgObj *pVgroup) {
-  SDbObj *pDb = pVgroup->pDb;
-  pVgroup->next = NULL;
-  pVgroup->prev = pDb->pTail;
-
-  if (pDb->pTail) pDb->pTail->next = pVgroup;
-  if (pDb->pHead == NULL) pDb->pHead = pVgroup;
-
-  pDb->pTail = pVgroup;
-  pDb->numOfVgroups++;
+  pDb->vgList[vgPos] = pVgroup;
+  pthread_mutex_unlock(&pDb->mutex);
 }
 
 void mnodeRemoveVgroupFromDb(SVgObj *pVgroup) {
   SDbObj *pDb = pVgroup->pDb;
-  if (pVgroup->prev) pVgroup->prev->next = pVgroup->next;
-  if (pVgroup->next) pVgroup->next->prev = pVgroup->prev;
-  if (pVgroup->prev == NULL) pDb->pHead = pVgroup->next;
-  if (pVgroup->next == NULL) pDb->pTail = pVgroup->prev;
-  pDb->numOfVgroups--;
-}
 
-void mnodeMoveVgroupToTail(SVgObj *pVgroup) {
-  mnodeRemoveVgroupFromDb(pVgroup);
-  mnodeAddVgroupIntoDbTail(pVgroup);
-}
+  pthread_mutex_lock(&pDb->mutex);
+  for (int32_t v1 = 0; v1 < pDb->numOfVgroups; ++v1) {
+    if (pDb->vgList[v1] == pVgroup) {
+      for (int32_t v2 = v1; v2 < pDb->numOfVgroups - 1; ++v2) {
+        pDb->vgList[v2] = pDb->vgList[v2 + 1];
+      }
+      pDb->numOfVgroups--;
+      break;
+    }
+  }
 
-void mnodeMoveVgroupToHead(SVgObj *pVgroup) {
-  mnodeRemoveVgroupFromDb(pVgroup);
-  mnodeAddVgroupIntoDb(pVgroup);
+  pthread_mutex_unlock(&pDb->mutex);
 }
 
 void mnodeCleanupDbs() {
@@ -531,11 +530,6 @@ static int32_t mnodeGetDbMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn
 #ifndef __CLOUD_VERSION__
   if (strcmp(pUser->user, TSDB_DEFAULT_USER) == 0) {
 #endif
-    pShow->bytes[cols] = 4;
-    pSchema[cols].type = TSDB_DATA_TYPE_INT;
-    strcpy(pSchema[cols].name, "maxtables");
-    pSchema[cols].bytes = htons(pShow->bytes[cols]);
-    cols++;
 
     pShow->bytes[cols] = 4;
     pSchema[cols].type = TSDB_DATA_TYPE_INT;
@@ -561,18 +555,18 @@ static int32_t mnodeGetDbMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
 
-    pShow->bytes[cols] = 4;
-    pSchema[cols].type = TSDB_DATA_TYPE_INT;
-    strcpy(pSchema[cols].name, "ctime(Sec.)");
-    pSchema[cols].bytes = htons(pShow->bytes[cols]);
-    cols++;
-
     pShow->bytes[cols] = 1;
     pSchema[cols].type = TSDB_DATA_TYPE_TINYINT;
     strcpy(pSchema[cols].name, "wallevel");
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
 
+    pShow->bytes[cols] = 4;
+    pSchema[cols].type = TSDB_DATA_TYPE_INT;
+    strcpy(pSchema[cols].name, "fsync");
+    pSchema[cols].bytes = htons(pShow->bytes[cols]);
+    cols++;
+
     pShow->bytes[cols] = 1;
     pSchema[cols].type = TSDB_DATA_TYPE_TINYINT;
     strcpy(pSchema[cols].name, "comp");
@@ -676,10 +670,6 @@ static int32_t mnodeRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void
 #ifndef __CLOUD_VERSION__
     if (strcmp(pUser->user, TSDB_DEFAULT_USER) == 0) {
 #endif
-      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      *(int32_t *)pWrite = pDb->cfg.maxTables;  // table num can be created should minus 1
-      cols++;
-
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
       *(int32_t *)pWrite = pDb->cfg.cacheBlockSize;
       cols++;
@@ -697,11 +687,11 @@ static int32_t mnodeRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void
       cols++;
       
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      *(int32_t *)pWrite = pDb->cfg.commitTime;
+      *(int8_t *)pWrite = pDb->cfg.walLevel;
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      *(int8_t *)pWrite = pDb->cfg.walLevel;
+      *(int32_t *)pWrite = pDb->cfg.fsyncPeriod;
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
@@ -780,6 +770,7 @@ static int32_t mnodeProcessCreateDbMsg(SMnodeMsg *pMsg) {
   pCreate->daysToKeep1     = htonl(pCreate->daysToKeep1);
   pCreate->daysToKeep2     = htonl(pCreate->daysToKeep2);
   pCreate->commitTime      = htonl(pCreate->commitTime);
+  pCreate->fsyncPeriod     = htonl(pCreate->fsyncPeriod);
   pCreate->minRowsPerFileBlock = htonl(pCreate->minRowsPerFileBlock);
   pCreate->maxRowsPerFileBlock = htonl(pCreate->maxRowsPerFileBlock);
   
@@ -807,6 +798,7 @@ static SDbCfg mnodeGetAlterDbOption(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
   int32_t minRows        = htonl(pAlter->minRowsPerFileBlock);
   int32_t maxRows        = htonl(pAlter->maxRowsPerFileBlock);
   int32_t commitTime     = htonl(pAlter->commitTime);
+  int32_t fsyncPeriod    = htonl(pAlter->fsyncPeriod);
   int8_t  compression    = pAlter->compression;
   int8_t  walLevel       = pAlter->walLevel;
   int8_t  replications   = pAlter->replications;
@@ -883,6 +875,11 @@ static SDbCfg mnodeGetAlterDbOption(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
     terrno = TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
+  if (fsyncPeriod >= 0 && fsyncPeriod != pDb->cfg.fsyncPeriod) {
+    mError("db:%s, can't alter fsyncPeriod option", pDb->name);
+    terrno = TSDB_CODE_MND_INVALID_DB_OPTION;
+  }
+
   if (replications > 0 && replications != pDb->cfg.replications) {
     mDebug("db:%s, replications:%d change to %d", pDb->name, pDb->cfg.replications, replications);
     newCfg.replications = replications;
@@ -916,7 +913,7 @@ static int32_t mnodeAlterDbCb(SMnodeMsg *pMsg, int32_t code) {
     pIter = mnodeGetNextVgroup(pIter, &pVgroup);
     if (pVgroup == NULL) break;
     if (pVgroup->pDb == pDb) {
-      mnodeSendCreateVgroupMsg(pVgroup, NULL);
+      mnodeSendAlterVgroupMsg(pVgroup);
     }
     mnodeDecVgroupRef(pVgroup);
   }
diff --git a/src/mnode/src/mnodeDnode.c b/src/mnode/src/mnodeDnode.c
index 29272fbd4f..06d79bd7e1 100644
--- a/src/mnode/src/mnodeDnode.c
+++ b/src/mnode/src/mnodeDnode.c
@@ -69,6 +69,7 @@ static int32_t mnodeDnodeActionInsert(SSdbOper *pOper) {
   SDnodeObj *pDnode = pOper->pObj;
   if (pDnode->status != TAOS_DN_STATUS_DROPPING) {
     pDnode->status = TAOS_DN_STATUS_OFFLINE;
+    pDnode->lastAccess = tsAccessSquence;
   }
 
   return TSDB_CODE_SUCCESS;
@@ -187,7 +188,27 @@ int32_t mnodeGetDnodesNum() {
   return sdbGetNumOfRows(tsDnodeSdb);
 }
 
-int32_t mnodeGetOnlinDnodesNum(char *ep) {
+int32_t mnodeGetOnlinDnodesCpuCoreNum() {
+  SDnodeObj *pDnode = NULL;
+  void *     pIter = NULL;
+  int32_t    cpuCores = 0;
+
+  while (1) {
+    pIter = mnodeGetNextDnode(pIter, &pDnode);
+    if (pDnode == NULL) break;
+    if (pDnode->status != TAOS_DN_STATUS_OFFLINE) {
+      cpuCores += pDnode->numOfCores;
+    }
+    mnodeDecDnodeRef(pDnode);
+  }
+
+  sdbFreeIter(pIter);
+
+  if (cpuCores < 2) cpuCores = 2;
+  return cpuCores;
+}
+
+int32_t mnodeGetOnlinDnodesNum() {
   SDnodeObj *pDnode = NULL;
   void *     pIter = NULL;
   int32_t    onlineDnodes = 0;
@@ -248,18 +269,37 @@ void mnodeUpdateDnode(SDnodeObj *pDnode) {
 }
 
 static int32_t mnodeProcessCfgDnodeMsg(SMnodeMsg *pMsg) {
+  if (strcmp(pMsg->pUser->user, TSDB_DEFAULT_USER) != 0) {
+    mError("failed to cfg dnode, no rights");
+    return TSDB_CODE_MND_NO_RIGHTS;
+  }
+  
   SCMCfgDnodeMsg *pCmCfgDnode = pMsg->rpcMsg.pCont;
   if (pCmCfgDnode->ep[0] == 0) {
-    strcpy(pCmCfgDnode->ep, tsLocalEp);
-  } else {
-    // TODO temporary disabled for compiling: strcpy(pCmCfgDnode->ep, pCmCfgDnode->ep); 
-  }
+    tstrncpy(pCmCfgDnode->ep, tsLocalEp, TSDB_EP_LEN);
+  } 
 
-  if (strcmp(pMsg->pUser->user, TSDB_DEFAULT_USER) != 0) {
-    return TSDB_CODE_MND_NO_RIGHTS;
+  int32_t dnodeId = 0;
+  char* pos = strchr(pCmCfgDnode->ep, ':');
+  if (NULL == pos) {
+    dnodeId = strtol(pCmCfgDnode->ep, NULL, 10);
+    if (dnodeId <= 0 || dnodeId > 65536) {
+      mError("failed to cfg dnode, invalid dnodeId:%s", pCmCfgDnode->ep);
+      return TSDB_CODE_MND_DNODE_NOT_EXIST;
+    }
   }
 
   SRpcIpSet ipSet = mnodeGetIpSetFromIp(pCmCfgDnode->ep);
+  if (dnodeId != 0) {
+    SDnodeObj *pDnode = mnodeGetDnode(dnodeId);
+    if (pDnode == NULL) {
+      mError("failed to cfg dnode, invalid dnodeId:%d", dnodeId);
+      return TSDB_CODE_MND_DNODE_NOT_EXIST;
+    }
+    ipSet = mnodeGetIpSetFromIp(pDnode->dnodeEp);
+    mnodeDecDnodeRef(pDnode);
+  }
+
   SMDCfgDnodeMsg *pMdCfgDnode = rpcMallocCont(sizeof(SMDCfgDnodeMsg));
   strcpy(pMdCfgDnode->ep, pCmCfgDnode->ep);
   strcpy(pMdCfgDnode->config, pCmCfgDnode->config);
@@ -271,9 +311,9 @@ static int32_t mnodeProcessCfgDnodeMsg(SMnodeMsg *pMsg) {
     .pCont = pMdCfgDnode,
     .contLen = sizeof(SMDCfgDnodeMsg)
   };
-  dnodeSendMsgToDnode(&ipSet, &rpcMdCfgDnodeMsg);
 
   mInfo("dnode:%s, is configured by %s", pCmCfgDnode->ep, pMsg->pUser->user);
+  dnodeSendMsgToDnode(&ipSet, &rpcMdCfgDnodeMsg);
 
   return TSDB_CODE_SUCCESS;
 }
@@ -283,15 +323,18 @@ static void mnodeProcessCfgDnodeMsgRsp(SRpcMsg *rpcMsg) {
 }
 
 static bool mnodeCheckClusterCfgPara(const SClusterCfg *clusterCfg) {
-  if (clusterCfg->numOfMnodes        != tsNumOfMnodes)        return false;
-  if (clusterCfg->mnodeEqualVnodeNum != tsMnodeEqualVnodeNum) return false;
-  if (clusterCfg->offlineThreshold   != tsOfflineThreshold)   return false;
-  if (clusterCfg->statusInterval     != tsStatusInterval)     return false;
+  if (clusterCfg->numOfMnodes        != htonl(tsNumOfMnodes))        return false;
+  if (clusterCfg->enableBalance      != htonl(tsEnableBalance))        return false;
+  if (clusterCfg->mnodeEqualVnodeNum != htonl(tsMnodeEqualVnodeNum)) return false;
+  if (clusterCfg->offlineThreshold   != htonl(tsOfflineThreshold))   return false;
+  if (clusterCfg->statusInterval     != htonl(tsStatusInterval))     return false;
+  if (clusterCfg->maxtablesPerVnode  != htonl(tsMaxTablePerVnode))   return false;
+  if (clusterCfg->maxVgroupsPerDb    != htonl(tsMaxVgroupsPerDb))    return false;
 
   if (0 != strncasecmp(clusterCfg->arbitrator, tsArbitrator, strlen(tsArbitrator))) return false;
   if (0 != strncasecmp(clusterCfg->timezone, tsTimezone, strlen(tsTimezone)))       return false;
-  if (0 != strncasecmp(clusterCfg->locale, tsLocale, strlen(tsLocale)))              return false;
-  if (0 != strncasecmp(clusterCfg->charset, tsCharset, strlen(tsCharset)))           return false;
+  if (0 != strncasecmp(clusterCfg->locale, tsLocale, strlen(tsLocale)))             return false;
+  if (0 != strncasecmp(clusterCfg->charset, tsCharset, strlen(tsCharset)))          return false;
     
   return true;
 }
@@ -376,7 +419,7 @@ static int32_t mnodeProcessDnodeStatusMsg(SMnodeMsg *pMsg) {
     if (false == ret) {
       mnodeDecDnodeRef(pDnode);
       rpcFreeCont(pRsp);
-      mError("dnode %s cluster cfg parameters inconsistent", pStatus->dnodeEp);
+      mError("dnode:%d, %s cluster cfg parameters inconsistent", pDnode->dnodeId, pStatus->dnodeEp);
       return TSDB_CODE_MND_CLUSTER_CFG_INCONSISTENT;
     }
     
@@ -468,18 +511,22 @@ static int32_t mnodeDropDnodeByEp(char *ep, SMnodeMsg *pMsg) {
     return TSDB_CODE_MND_DNODE_NOT_EXIST;
   }
 
-  mnodeDecDnodeRef(pDnode);
   if (strcmp(pDnode->dnodeEp, mnodeGetMnodeMasterEp()) == 0) {
     mError("dnode:%d, can't drop dnode:%s which is master", pDnode->dnodeId, ep);
+    mnodeDecDnodeRef(pDnode);
     return TSDB_CODE_MND_NO_REMOVE_MASTER;
   }
 
   mInfo("dnode:%d, start to drop it", pDnode->dnodeId);
+
 #ifndef _SYNC
-  return mnodeDropDnode(pDnode, pMsg);
+  int32_t code = mnodeDropDnode(pDnode, pMsg);
 #else
-  return balanceDropDnode(pDnode);
+  int32_t code = balanceDropDnode(pDnode);
 #endif
+
+  mnodeDecDnodeRef(pDnode);
+  return code;
 }
 
 static int32_t mnodeProcessCreateDnodeMsg(SMnodeMsg *pMsg) {
diff --git a/src/mnode/src/mnodeProfile.c b/src/mnode/src/mnodeProfile.c
index af4a09a45a..9121f31131 100644
--- a/src/mnode/src/mnodeProfile.c
+++ b/src/mnode/src/mnodeProfile.c
@@ -115,7 +115,7 @@ SConnObj *mnodeAccquireConn(int32_t connId, char *user, uint32_t ip, uint16_t po
   uint64_t expireTime = CONN_KEEP_TIME * 1000 + (uint64_t)taosGetTimestampMs();
   SConnObj *pConn = taosCacheUpdateExpireTimeByName(tsMnodeConnCache, &connId, sizeof(int32_t), expireTime);
   if (pConn == NULL) {
-    mError("connId:%d, is already destroyed, user:%s ip:%s:%u", connId, user, taosIpStr(ip), port);
+    mDebug("connId:%d, is already destroyed, user:%s ip:%s:%u", connId, user, taosIpStr(ip), port);
     return NULL;
   }
 
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index cdcb7357f1..e08f8ca0db 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -170,7 +170,7 @@ static void *sdbGetTableFromId(int32_t tableId) {
 }
 
 static int32_t sdbInitWal() {
-  SWalCfg walCfg = {.walLevel = 2, .wals = 2, .keep = 1};
+  SWalCfg walCfg = {.walLevel = 2, .wals = 2, .keep = 1, .fsyncPeriod = 0};
   char temp[TSDB_FILENAME_LEN];
   sprintf(temp, "%s/wal", tsMnodeDir);
   tsSdbObj.wal = walOpen(temp, &walCfg);
@@ -252,20 +252,26 @@ static void sdbConfirmForward(void *ahandle, void *param, int32_t code) {
   int32_t processedCount = atomic_add_fetch_32(&pOper->processedCount, 1);
   if (processedCount <= 1) {
     if (pMsg != NULL) {
-      sdbDebug("app:%p:%p, waiting for confirm this operation, count:%d", pMsg->rpcMsg.ahandle, pMsg, processedCount);
+      sdbDebug("app:%p:%p, waiting for confirm this operation, count:%d result:%s", pMsg->rpcMsg.ahandle, pMsg,
+               processedCount, tstrerror(code));
     }
     return;
   }
 
   if (pMsg != NULL) {
-    sdbDebug("app:%p:%p, is confirmed and will do callback func", pMsg->rpcMsg.ahandle, pMsg);
+    sdbDebug("app:%p:%p, is confirmed and will do callback func, result:%s", pMsg->rpcMsg.ahandle, pMsg,
+             tstrerror(code));
   }
 
   if (pOper->cb != NULL) {
     pOper->retCode = (*pOper->cb)(pMsg, pOper->retCode);
   }
-
   dnodeSendRpcMnodeWriteRsp(pMsg, pOper->retCode);
+
+  // if ahandle, means this func is called by sdb write
+  if (ahandle == NULL) {
+    sdbDecRef(pOper->table, pOper->pObj);
+  }
   taosFreeQitem(pOper);
 }
 
@@ -389,7 +395,7 @@ void sdbCleanUp() {
 }
 
 void sdbIncRef(void *handle, void *pObj) {
-  if (pObj == NULL) return;
+  if (pObj == NULL || handle == NULL) return;
 
   SSdbTable *pTable = handle;
   int32_t *  pRefCount = (int32_t *)(pObj + pTable->refCountPos);
@@ -398,7 +404,7 @@ void sdbIncRef(void *handle, void *pObj) {
 }
 
 void sdbDecRef(void *handle, void *pObj) {
-  if (pObj == NULL) return;
+  if (pObj == NULL || handle == NULL) return;
 
   SSdbTable *pTable = handle;
   int32_t *  pRefCount = (int32_t *)(pObj + pTable->refCountPos);
@@ -581,16 +587,26 @@ static int sdbWrite(void *param, void *data, int type) {
     return sdbInsertHash(pTable, &oper);
   } else if (action == SDB_ACTION_DELETE) {
     SSdbRow *rowMeta = sdbGetRowMeta(pTable, pHead->cont);
-    assert(rowMeta != NULL && rowMeta->row != NULL);
+    if (rowMeta == NULL || rowMeta->row == NULL) {
+      sdbError("table:%s, failed to get object:%s from wal while dispose delete action", pTable->tableName,
+               pHead->cont);
+      return TSDB_CODE_SUCCESS;
+    }
     SSdbOper oper = {.table = pTable, .pObj = rowMeta->row};
     return sdbDeleteHash(pTable, &oper);
   } else if (action == SDB_ACTION_UPDATE) {
     SSdbRow *rowMeta = sdbGetRowMeta(pTable, pHead->cont);
-    assert(rowMeta != NULL && rowMeta->row != NULL);
+    if (rowMeta == NULL || rowMeta->row == NULL) {
+      sdbError("table:%s, failed to get object:%s from wal while dispose update action", pTable->tableName,
+               pHead->cont);
+      return TSDB_CODE_SUCCESS;
+    }
     SSdbOper oper = {.rowSize = pHead->len, .rowData = pHead->cont, .table = pTable};
     code = (*pTable->decodeFp)(&oper);
     return sdbUpdateHash(pTable, &oper);
-  } else { return TSDB_CODE_MND_INVALID_MSG_TYPE; }
+  } else {
+    return TSDB_CODE_MND_INVALID_MSG_TYPE;
+  }
 }
 
 int32_t sdbInsertRow(SSdbOper *pOper) {
@@ -647,6 +663,14 @@ int32_t sdbInsertRow(SSdbOper *pOper) {
   return TSDB_CODE_SUCCESS;
 }
 
+bool sdbCheckRowDeleted(void *pTableInput, void *pRow) {
+  SSdbTable *pTable = pTableInput;
+  if (pTable == NULL) return false;
+
+  int8_t *updateEnd = pRow + pTable->refCountPos - 1;
+  return (*updateEnd == 1);
+}
+
 int32_t sdbDeleteRow(SSdbOper *pOper) {
   SSdbTable *pTable = (SSdbTable *)pOper->table;
   if (pTable == NULL) return TSDB_CODE_MND_SDB_INVALID_TABLE_TYPE;
@@ -663,14 +687,18 @@ int32_t sdbDeleteRow(SSdbOper *pOper) {
     return TSDB_CODE_MND_SDB_INVAID_META_ROW;
   }
 
+  sdbIncRef(pTable, pOper->pObj);
+
   int32_t code = sdbDeleteHash(pTable, pOper);
   if (code != TSDB_CODE_SUCCESS) {
     sdbError("table:%s, failed to delete from hash", pTable->tableName);
+    sdbDecRef(pTable, pOper->pObj);
     return code;
   }
 
   // just delete data from memory
   if (pOper->type != SDB_OPER_GLOBAL) {
+    sdbDecRef(pTable, pOper->pObj);
     return TSDB_CODE_SUCCESS;
   }
 
@@ -692,7 +720,6 @@ int32_t sdbDeleteRow(SSdbOper *pOper) {
              pNewOper->pMsg, pTable->tableName, pOper->pObj, sdbGetKeyStrFromObj(pTable, pOper->pObj));
   }
 
-  sdbIncRef(pNewOper->table, pNewOper->pObj);
   taosWriteQitem(tsSdbWriteQueue, TAOS_QTYPE_RPC, pNewOper);
   return TSDB_CODE_SUCCESS;
 }
@@ -968,10 +995,11 @@ static void *sdbWorkerFp(void *param) {
 
       int32_t code = sdbWrite(pOper, pHead, type);
       if (code > 0) code = 0;
-      if (pOper)
+      if (pOper) {
         pOper->retCode = code;
-      else
+      } else {
         pHead->len = code;  // hackway
+      }
     }
 
     walFsync(tsSdbObj.wal);
@@ -983,7 +1011,6 @@ static void *sdbWorkerFp(void *param) {
 
       if (type == TAOS_QTYPE_RPC) {
         pOper = (SSdbOper *)item;
-        sdbDecRef(pOper->table, pOper->pObj);
         sdbConfirmForward(NULL, pOper, pOper->retCode);
       } else if (type == TAOS_QTYPE_FWD) {
         pHead = (SWalHead *)item;
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 523d7001c2..80c4fc95ab 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -72,7 +72,7 @@ static void    mnodeProcessCreateChildTableRsp(SRpcMsg *rpcMsg);
 static int32_t mnodeProcessDropTableMsg(SMnodeMsg *mnodeMsg);
 static int32_t mnodeProcessDropSuperTableMsg(SMnodeMsg *pMsg);
 static void    mnodeProcessDropSuperTableRsp(SRpcMsg *rpcMsg);
-static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg);
+static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg, bool needReturn);
 static void    mnodeProcessDropChildTableRsp(SRpcMsg *rpcMsg);
 
 static int32_t mnodeProcessSuperTableVgroupMsg(SMnodeMsg *mnodeMsg);
@@ -319,15 +319,6 @@ static int32_t mnodeChildTableActionRestored() {
       continue;
     }
 
-    if (pVgroup->tableList == NULL) {
-      mError("ctable:%s, vgId:%d tableList is null", pTable->info.tableId, pTable->vgId);
-      pTable->vgId = 0;
-      SSdbOper desc = {.type = SDB_OPER_LOCAL, .pObj = pTable, .table = tsChildTableSdb};
-      sdbDeleteRow(&desc);
-      mnodeDecTableRef(pTable);
-      continue;
-    }
-
     if (pTable->info.type == TSDB_CHILD_TABLE) {
       SSuperTableObj *pSuperTable = mnodeGetSuperTableByUid(pTable->suid);
       if (pSuperTable == NULL) {
@@ -385,7 +376,7 @@ static void mnodeCleanupChildTables() {
 }
 
 static void mnodeAddTableIntoStable(SSuperTableObj *pStable, SChildTableObj *pCtable) {
-  pStable->numOfTables++;
+  atomic_add_fetch_32(&pStable->numOfTables, 1);
 
   if (pStable->vgHash == NULL) {
     pStable->vgHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), false);
@@ -394,18 +385,22 @@ static void mnodeAddTableIntoStable(SSuperTableObj *pStable, SChildTableObj *pCt
   if (pStable->vgHash != NULL) {
     if (taosHashGet(pStable->vgHash, &pCtable->vgId, sizeof(pCtable->vgId)) == NULL) {
       taosHashPut(pStable->vgHash, &pCtable->vgId, sizeof(pCtable->vgId), &pCtable->vgId, sizeof(pCtable->vgId));
+      mDebug("table:%s, vgId:%d is put into stable vgList, sizeOfVgList:%d", pStable->info.tableId, pCtable->vgId,
+             (int32_t)taosHashGetSize(pStable->vgHash));
     }
   }
 }
 
 static void mnodeRemoveTableFromStable(SSuperTableObj *pStable, SChildTableObj *pCtable) {
-  pStable->numOfTables--;
+  atomic_sub_fetch_32(&pStable->numOfTables, 1);
 
   if (pStable->vgHash == NULL) return;
 
   SVgObj *pVgroup = mnodeGetVgroup(pCtable->vgId);
   if (pVgroup == NULL) {
     taosHashRemove(pStable->vgHash, (char *)&pCtable->vgId, sizeof(pCtable->vgId));
+    mDebug("table:%s, vgId:%d is remove from stable vgList, sizeOfVgList:%d", pStable->info.tableId, pCtable->vgId,
+           (int32_t)taosHashGetSize(pStable->vgHash));
   }
   mnodeDecVgroupRef(pVgroup);
 }
@@ -757,11 +752,15 @@ static int32_t mnodeProcessDropTableMsg(SMnodeMsg *pMsg) {
   }
 
   if (pMsg->pTable->type == TSDB_SUPER_TABLE) {
-    mInfo("app:%p:%p, table:%s, start to drop stable", pMsg->rpcMsg.ahandle, pMsg, pDrop->tableId);
+    SSuperTableObj *pSTable = (SSuperTableObj *)pMsg->pTable;
+    mInfo("app:%p:%p, table:%s, start to drop stable, uid:%" PRIu64 ", numOfChildTables:%d, sizeOfVgList:%d",
+          pMsg->rpcMsg.ahandle, pMsg, pDrop->tableId, pSTable->uid, pSTable->numOfTables, (int32_t)taosHashGetSize(pSTable->vgHash));
     return mnodeProcessDropSuperTableMsg(pMsg);
   } else {
-    mInfo("app:%p:%p, table:%s, start to drop ctable", pMsg->rpcMsg.ahandle, pMsg, pDrop->tableId);
-    return mnodeProcessDropChildTableMsg(pMsg);
+    SChildTableObj *pCTable = (SChildTableObj *)pMsg->pTable;
+    mInfo("app:%p:%p, table:%s, start to drop ctable, vgId:%d sid:%d uid:%" PRIu64, pMsg->rpcMsg.ahandle, pMsg,
+          pDrop->tableId, pCTable->vgId, pCTable->sid, pCTable->uid);
+    return mnodeProcessDropChildTableMsg(pMsg, true);
   }
 }
 
@@ -808,7 +807,7 @@ static int32_t mnodeCreateSuperTableCb(SMnodeMsg *pMsg, int32_t code) {
   assert(pTable);
 
   if (code == TSDB_CODE_SUCCESS) {
-    mLInfo("stable:%s, is created in sdb", pTable->info.tableId);
+    mLInfo("stable:%s, is created in sdb, uid:%" PRIu64, pTable->info.tableId, pTable->uid);
   } else {
     mError("app:%p:%p, stable:%s, failed to create in sdb, reason:%s", pMsg->rpcMsg.ahandle, pMsg, pTable->info.tableId,
            tstrerror(code));
@@ -896,7 +895,7 @@ static int32_t mnodeProcessDropSuperTableMsg(SMnodeMsg *pMsg) {
   if (pMsg == NULL) return TSDB_CODE_MND_APP_ERROR;
 
   SSuperTableObj *pStable = (SSuperTableObj *)pMsg->pTable;
-  if (pStable->numOfTables != 0) {
+   if (pStable->vgHash != NULL /*pStable->numOfTables != 0*/) {
     SHashMutableIterator *pIter = taosHashCreateIter(pStable->vgHash);
     while (taosHashIterNext(pIter)) {
       int32_t *pVgId = taosHashIterGet(pIter);
@@ -1600,8 +1599,8 @@ static int32_t mnodeDoCreateChildTableCb(SMnodeMsg *pMsg, int32_t code) {
   assert(pTable);
 
   if (code == TSDB_CODE_SUCCESS) {
-    mDebug("app:%p:%p, table:%s, create table in sid:%d, uid:%" PRIu64, pMsg->rpcMsg.ahandle, pMsg, pTable->info.tableId,
-           pTable->sid, pTable->uid);
+    mDebug("app:%p:%p, table:%s, created in mnode, vgId:%d sid:%d, uid:%" PRIu64 ", result:%s", pMsg->rpcMsg.ahandle,
+           pMsg, pTable->info.tableId, pTable->vgId, pTable->sid, pTable->uid, tstrerror(code));
   } else {
     mError("app:%p:%p, table:%s, failed to create table sid:%d, uid:%" PRIu64 ", reason:%s", pMsg->rpcMsg.ahandle, pMsg,
            pTable->info.tableId, pTable->sid, pTable->uid, tstrerror(code));
@@ -1730,27 +1729,25 @@ static int32_t mnodeProcessCreateChildTableMsg(SMnodeMsg *pMsg) {
     return code;
   }
 
-  SVgObj *pVgroup = mnodeGetAvailableVgroup(pMsg->pDb);
-  if (pVgroup == NULL) {
-    mDebug("app:%p:%p, table:%s, start to create a new vgroup", pMsg->rpcMsg.ahandle, pMsg, pCreate->tableId);
-    return mnodeCreateVgroup(pMsg, pMsg->pDb);
-  }
-
   if (pMsg->retry == 0) {
     if (pMsg->pTable == NULL) {
-      int32_t sid = taosAllocateId(pVgroup->idPool);
-      if (sid <= 0) {
-        mDebug("app:%p:%p, table:%s, no enough sid in vgId:%d", pMsg->rpcMsg.ahandle, pMsg, pCreate->tableId,
-               pVgroup->vgId);
-        return mnodeCreateVgroup(pMsg, pMsg->pDb);
+      SVgObj *pVgroup = NULL;
+      int32_t sid = 0;
+      code = mnodeGetAvailableVgroup(pMsg, &pVgroup, &sid);
+      if (code != TSDB_CODE_SUCCESS) {
+        mDebug("app:%p:%p, table:%s, failed to get available vgroup, reason:%s", pMsg->rpcMsg.ahandle, pMsg,
+               pCreate->tableId, tstrerror(code));
+        return code;
       }
 
-      if (pMsg->pVgroup == NULL) {
-        pMsg->pVgroup = pVgroup;
-        mnodeIncVgroupRef(pVgroup);
+      if (pMsg->pVgroup != NULL) {
+        mnodeDecVgroupRef(pMsg->pVgroup);
       }
 
-      mDebug("app:%p:%p, table:%s, create table in vgroup, vgId:%d sid:%d", pMsg->rpcMsg.ahandle, pMsg, pCreate->tableId,
+      pMsg->pVgroup = pVgroup;
+      mnodeIncVgroupRef(pVgroup);
+
+      mDebug("app:%p:%p, table:%s, allocated in vgroup, vgId:%d sid:%d", pMsg->rpcMsg.ahandle, pMsg, pCreate->tableId,
              pVgroup->vgId, sid);
 
       return mnodeDoCreateChildTable(pMsg, sid);
@@ -1769,7 +1766,7 @@ static int32_t mnodeProcessCreateChildTableMsg(SMnodeMsg *pMsg) {
   }
 }
 
-static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg) {
+static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg, bool needReturn) {
   SChildTableObj *pTable = (SChildTableObj *)pMsg->pTable;
   if (pMsg->pVgroup == NULL) pMsg->pVgroup = mnodeGetVgroup(pTable->vgId);
   if (pMsg->pVgroup == NULL) {
@@ -1793,7 +1790,9 @@ static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg) {
 
   SRpcIpSet ipSet = mnodeGetIpSetFromVgroup(pMsg->pVgroup);
 
-  mInfo("app:%p:%p, table:%s, send drop ctable msg", pMsg->rpcMsg.ahandle, pMsg, pDrop->tableId);
+  mInfo("app:%p:%p, table:%s, send drop ctable msg, vgId:%d sid:%d uid:%" PRIu64, pMsg->rpcMsg.ahandle, pMsg,
+        pDrop->tableId, pTable->vgId, pTable->sid, pTable->uid);
+
   SRpcMsg rpcMsg = {
     .ahandle = pMsg,
     .pCont   = pDrop,
@@ -1802,6 +1801,8 @@ static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg) {
     .msgType = TSDB_MSG_TYPE_MD_DROP_TABLE
   };
 
+  if (!needReturn) rpcMsg.ahandle = NULL;
+
   dnodeSendMsgToDnode(&ipSet, &rpcMsg);
 
   return TSDB_CODE_MND_ACTION_IN_PROGRESS;
@@ -2125,7 +2126,7 @@ static void mnodeDropAllChildTablesInStable(SSuperTableObj *pStable) {
   int32_t numOfTables = 0;
   SChildTableObj *pTable = NULL;
 
-  mInfo("stable:%s, all child tables(%d) will dropped from sdb", pStable->info.tableId, numOfTables);
+  mInfo("stable:%s, all child tables:%d will dropped from sdb", pStable->info.tableId, pStable->numOfTables);
 
   while (1) {
     pIter = mnodeGetNextChildTable(pIter, &pTable);
@@ -2149,6 +2150,7 @@ static void mnodeDropAllChildTablesInStable(SSuperTableObj *pStable) {
   mInfo("stable:%s, all child tables:%d is dropped from sdb", pStable->info.tableId, numOfTables);
 }
 
+#if 0
 static SChildTableObj* mnodeGetTableByPos(int32_t vnode, int32_t sid) {
   SVgObj *pVgroup = mnodeGetVgroup(vnode);
   if (pVgroup == NULL) return NULL;
@@ -2159,8 +2161,11 @@ static SChildTableObj* mnodeGetTableByPos(int32_t vnode, int32_t sid) {
   mnodeDecVgroupRef(pVgroup);
   return pTable;
 }
+#endif
 
 static int32_t mnodeProcessTableCfgMsg(SMnodeMsg *pMsg) {
+  return TSDB_CODE_COM_OPS_NOT_SUPPORT;
+#if 0  
   SDMConfigTableMsg *pCfg = pMsg->rpcMsg.pCont;
   pCfg->dnodeId = htonl(pCfg->dnodeId);
   pCfg->vgId = htonl(pCfg->vgId);
@@ -2184,6 +2189,7 @@ static int32_t mnodeProcessTableCfgMsg(SMnodeMsg *pMsg) {
   pMsg->rpcRsp.rsp = pCreate;
   pMsg->rpcRsp.len = htonl(pCreate->contLen);
   return TSDB_CODE_SUCCESS;
+#endif  
 }
 
 // handle drop child response
@@ -2195,12 +2201,15 @@ static void mnodeProcessDropChildTableRsp(SRpcMsg *rpcMsg) {
 
   SChildTableObj *pTable = (SChildTableObj *)mnodeMsg->pTable;
   assert(pTable);
-  mInfo("app:%p:%p, table:%s, drop table rsp received, thandle:%p result:%s", mnodeMsg->rpcMsg.ahandle, mnodeMsg,
-         pTable->info.tableId, mnodeMsg->rpcMsg.handle, tstrerror(rpcMsg->code));
+
+  mInfo("app:%p:%p, table:%s, drop table rsp received, vgId:%d sid:%d uid:%" PRIu64 ", thandle:%p result:%s",
+        mnodeMsg->rpcMsg.ahandle, mnodeMsg, pTable->info.tableId, pTable->vgId, pTable->sid, pTable->uid,
+        mnodeMsg->rpcMsg.handle, tstrerror(rpcMsg->code));
 
   if (rpcMsg->code != TSDB_CODE_SUCCESS) {
-    mError("app:%p:%p, table:%s, failed to drop in dnode, reason:%s", mnodeMsg->rpcMsg.ahandle, mnodeMsg,
-           pTable->info.tableId, tstrerror(rpcMsg->code));
+    mError("app:%p:%p, table:%s, failed to drop in dnode, vgId:%d sid:%d uid:%" PRIu64 ", reason:%s",
+           mnodeMsg->rpcMsg.ahandle, mnodeMsg, pTable->info.tableId, pTable->vgId, pTable->sid, pTable->uid,
+           tstrerror(rpcMsg->code));
     dnodeSendRpcMnodeWriteRsp(mnodeMsg, rpcMsg->code);
     return;
   }
@@ -2247,6 +2256,14 @@ static void mnodeProcessCreateChildTableRsp(SRpcMsg *rpcMsg) {
   SChildTableObj *pTable = (SChildTableObj *)mnodeMsg->pTable;
   assert(pTable);
 
+  // If the table is deleted by another thread during creation, stop creating and send drop msg to vnode
+  if (sdbCheckRowDeleted(tsChildTableSdb, pTable)) {
+    mDebug("app:%p:%p, table:%s, create table rsp received, but a deleting opertion incoming, vgId:%d sid:%d uid:%" PRIu64,
+           mnodeMsg->rpcMsg.ahandle, mnodeMsg, pTable->info.tableId, pTable->vgId, pTable->sid, pTable->uid);
+    mnodeProcessDropChildTableMsg(mnodeMsg, false);
+    rpcMsg->code = TSDB_CODE_SUCCESS;
+  }
+
   if (rpcMsg->code == TSDB_CODE_SUCCESS || rpcMsg->code == TSDB_CODE_TDB_TABLE_ALREADY_EXIST) {
     SCMCreateTableMsg *pCreate = mnodeMsg->rpcMsg.pCont;
     if (pCreate->getMeta) {
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index 966d4b0dd8..8c8aa5fb31 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -40,30 +40,41 @@
 
 typedef enum {
   TAOS_VG_STATUS_READY,
-  TAOS_VG_STATUS_DROPPING
+  TAOS_VG_STATUS_DROPPING,
+  TAOS_VG_STATUS_CREATING,
+  TAOS_VG_STATUS_UPDATING,
 } EVgroupStatus;
 
+char* vgroupStatus[] = {
+  "ready",
+  "dropping",
+  "creating",
+  "updating"
+};
+
 static void   *tsVgroupSdb = NULL;
 static int32_t tsVgUpdateSize = 0;
 
+static int32_t mnodeAllocVgroupIdPool(SVgObj *pInputVgroup);
 static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn);
 static int32_t mnodeRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pConn);
 static void    mnodeProcessCreateVnodeRsp(SRpcMsg *rpcMsg);
+static void    mnodeProcessAlterVnodeRsp(SRpcMsg *rpcMsg);
 static void    mnodeProcessDropVnodeRsp(SRpcMsg *rpcMsg);
 static int32_t mnodeProcessVnodeCfgMsg(SMnodeMsg *pMsg) ;
 static void    mnodeSendDropVgroupMsg(SVgObj *pVgroup, void *ahandle);
 
-static int32_t mnodeVgroupActionDestroy(SSdbOper *pOper) {
-  SVgObj *pVgroup = pOper->pObj;
+static void mnodeDestroyVgroup(SVgObj *pVgroup) {
   if (pVgroup->idPool) {
     taosIdPoolCleanUp(pVgroup->idPool);
     pVgroup->idPool = NULL;
   }
-  if (pVgroup->tableList) {
-    tfree(pVgroup->tableList);
-  }
 
-  tfree(pOper->pObj);
+  tfree(pVgroup);
+}
+
+static int32_t mnodeVgroupActionDestroy(SSdbOper *pOper) {
+  mnodeDestroyVgroup(pOper->pObj);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -82,21 +93,10 @@ static int32_t mnodeVgroupActionInsert(SSdbOper *pOper) {
   }
 
   pVgroup->pDb = pDb;
-  pVgroup->prev = NULL;
-  pVgroup->next = NULL;
+  pVgroup->status = TAOS_VG_STATUS_CREATING;
   pVgroup->accessState = TSDB_VN_ALL_ACCCESS;
-
-  int32_t size = sizeof(SChildTableObj *) * pDb->cfg.maxTables;
-  pVgroup->tableList = calloc(pDb->cfg.maxTables, sizeof(SChildTableObj *));
-  if (pVgroup->tableList == NULL) {
-    mError("vgId:%d, failed to malloc(size:%d) for the tableList of vgroups", pVgroup->vgId, size);
-    return -1;
-  }
-
-  pVgroup->idPool = taosInitIdPool(pDb->cfg.maxTables);
-  if (pVgroup->idPool == NULL) {
-    mError("vgId:%d, failed to taosInitIdPool for vgroups", pVgroup->vgId);
-    tfree(pVgroup->tableList);
+  if (mnodeAllocVgroupIdPool(pVgroup) < 0) {
+    mError("vgId:%d, failed to init idpool for vgroups", pVgroup->vgId);
     return -1;
   }
 
@@ -134,20 +134,6 @@ static int32_t mnodeVgroupActionDelete(SSdbOper *pOper) {
   return TSDB_CODE_SUCCESS;
 }
 
-static void mnodeVgroupUpdateIdPool(SVgObj *pVgroup) {
-  int32_t oldTables = taosIdPoolMaxSize(pVgroup->idPool);
-  SDbObj *pDb = pVgroup->pDb;
-  if (pDb != NULL) {
-    if (pDb->cfg.maxTables != oldTables) {
-      mInfo("vgId:%d tables change from %d to %d", pVgroup->vgId, oldTables, pDb->cfg.maxTables);
-      taosUpdateIdPool(pVgroup->idPool, pDb->cfg.maxTables);
-      int32_t size = sizeof(SChildTableObj *) * pDb->cfg.maxTables;
-      pVgroup->tableList = (SChildTableObj **)realloc(pVgroup->tableList, size);
-      memset(pVgroup->tableList + oldTables, 0, (pDb->cfg.maxTables - oldTables) * sizeof(SChildTableObj *));
-    }
-  }
-}
-
 static int32_t mnodeVgroupActionUpdate(SSdbOper *pOper) {
   SVgObj *pNew = pOper->pObj;
   SVgObj *pVgroup = mnodeGetVgroup(pNew->vgId);
@@ -174,7 +160,6 @@ static int32_t mnodeVgroupActionUpdate(SSdbOper *pOper) {
     free(pNew);
   }
 
-  mnodeVgroupUpdateIdPool(pVgroup);
 
   // reset vgid status on vgroup changed
   mDebug("vgId:%d, reset sync status to unsynced", pVgroup->vgId);
@@ -243,6 +228,7 @@ int32_t mnodeInitVgroups() {
   mnodeAddShowMetaHandle(TSDB_MGMT_TABLE_VGROUP, mnodeGetVgroupMeta);
   mnodeAddShowRetrieveHandle(TSDB_MGMT_TABLE_VGROUP, mnodeRetrieveVgroups);
   mnodeAddPeerRspHandle(TSDB_MSG_TYPE_MD_CREATE_VNODE_RSP, mnodeProcessCreateVnodeRsp);
+  mnodeAddPeerRspHandle(TSDB_MSG_TYPE_MD_ALTER_VNODE_RSP, mnodeProcessAlterVnodeRsp);
   mnodeAddPeerRspHandle(TSDB_MSG_TYPE_MD_DROP_VNODE_RSP, mnodeProcessDropVnodeRsp);
   mnodeAddPeerMsgHandle(TSDB_MSG_TYPE_DM_CONFIG_VNODE, mnodeProcessVnodeCfgMsg);
 
@@ -273,7 +259,7 @@ void mnodeUpdateVgroup(SVgObj *pVgroup) {
   if (sdbUpdateRow(&oper) != TSDB_CODE_SUCCESS) {
     mError("vgId:%d, failed to update vgroup", pVgroup->vgId);
   }
-  mnodeSendCreateVgroupMsg(pVgroup, NULL);
+  mnodeSendAlterVgroupMsg(pVgroup);
 }
 
 /*
@@ -297,10 +283,17 @@ void mnodeCheckUnCreatedVgroup(SDnodeObj *pDnode, SVnodeLoad *pVloads, int32_t o
       pNextV++;
     }
 
-    if (i == openVnodes && pVgroup->status == TAOS_VG_STATUS_READY) {
-      mnodeSendCreateVgroupMsg(pVgroup, NULL);
+    if (i == openVnodes) {
+      if (pVgroup->status == TAOS_VG_STATUS_CREATING || pVgroup->status == TAOS_VG_STATUS_DROPPING) {
+        mDebug("vgId:%d, not exist in dnode:%d and status is %s, do nothing", pVgroup->vgId, pDnode->dnodeId,
+               vgroupStatus[pVgroup->status]);
+      } else {
+        mDebug("vgId:%d, not exist in dnode:%d and status is %s, send create msg", pVgroup->vgId, pDnode->dnodeId,
+               vgroupStatus[pVgroup->status]);
+        mnodeSendCreateVgroupMsg(pVgroup, NULL);
+      }
     }
-    
+
     mnodeDecVgroupRef(pVgroup);
   }
 
@@ -340,12 +333,136 @@ void mnodeUpdateVgroupStatus(SVgObj *pVgroup, SDnodeObj *pDnode, SVnodeLoad *pVl
     mError("dnode:%d, vgId:%d, vnode cfgVersion:%d repica:%d not match with mnode cfgVersion:%d replica:%d",
            pDnode->dnodeId, pVload->vgId, pVload->cfgVersion, pVload->replica, pVgroup->pDb->cfgVersion,
            pVgroup->numOfVnodes);
-    mnodeSendCreateVgroupMsg(pVgroup, NULL);
+    mnodeSendAlterVgroupMsg(pVgroup);
   }
 }
 
-SVgObj *mnodeGetAvailableVgroup(SDbObj *pDb) {
-  return pDb->pHead;
+static int32_t mnodeAllocVgroupIdPool(SVgObj *pInputVgroup) {
+  SDbObj *pDb = pInputVgroup->pDb;
+  if (pDb == NULL) return TSDB_CODE_MND_APP_ERROR;
+
+  int32_t minIdPoolSize = TSDB_MAX_TABLES;
+  int32_t maxIdPoolSize = tsMinTablePerVnode;
+  for (int32_t v = 0; v < pDb->numOfVgroups; ++v) {
+    SVgObj *pVgroup = pDb->vgList[v];
+    if (pVgroup == NULL) continue;
+
+    int32_t idPoolSize = taosIdPoolMaxSize(pVgroup->idPool);
+    minIdPoolSize = MIN(minIdPoolSize, idPoolSize);
+    maxIdPoolSize = MAX(maxIdPoolSize, idPoolSize);
+  }
+
+  // new vgroup
+  if (pInputVgroup->idPool == NULL) {
+    pInputVgroup->idPool = taosInitIdPool(maxIdPoolSize);
+    if (pInputVgroup->idPool == NULL) {
+      mError("vgId:%d, failed to init idPool for vgroup, size:%d", pInputVgroup->vgId, maxIdPoolSize);
+      return TSDB_CODE_MND_OUT_OF_MEMORY;
+    } else {
+      mDebug("vgId:%d, init idPool for vgroup, size:%d", pInputVgroup->vgId, maxIdPoolSize);
+      return TSDB_CODE_SUCCESS;
+    }
+  }
+
+  // realloc all vgroups in db
+  int32_t newIdPoolSize;
+  if (minIdPoolSize * 4 < tsTableIncStepPerVnode) {
+    newIdPoolSize = minIdPoolSize * 4;
+  } else {
+    newIdPoolSize = ((minIdPoolSize / tsTableIncStepPerVnode) + 1) * tsTableIncStepPerVnode;
+  }
+
+  if (newIdPoolSize > tsMaxTablePerVnode) {
+    if (minIdPoolSize >= tsMaxTablePerVnode) {
+      mError("db:%s, minIdPoolSize:%d newIdPoolSize:%d larger than maxTablesPerVnode:%d", pDb->name, minIdPoolSize, newIdPoolSize,
+             tsMaxTablePerVnode);
+      return TSDB_CODE_MND_NO_ENOUGH_DNODES;
+    } else {
+      newIdPoolSize = tsMaxTablePerVnode;
+    }
+  }
+
+  for (int32_t v = 0; v < pDb->numOfVgroups; ++v) {
+    SVgObj *pVgroup = pDb->vgList[v];
+    if (pVgroup == NULL) continue;
+
+    int32_t oldIdPoolSize = taosIdPoolMaxSize(pVgroup->idPool);
+    if (newIdPoolSize == oldIdPoolSize) continue;
+
+    if (taosUpdateIdPool(pVgroup->idPool, newIdPoolSize) < 0) {
+      mError("vgId:%d, failed to update idPoolSize from %d to %d", pVgroup->vgId, oldIdPoolSize, newIdPoolSize);
+      return TSDB_CODE_MND_NO_ENOUGH_DNODES;
+    } else {
+      mDebug("vgId:%d, idPoolSize update from %d to %d", pVgroup->vgId, oldIdPoolSize, newIdPoolSize);
+    }
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
+int32_t mnodeGetAvailableVgroup(SMnodeMsg *pMsg, SVgObj **ppVgroup, int32_t *pSid) {
+  SDbObj *pDb = pMsg->pDb;
+  pthread_mutex_lock(&pDb->mutex);
+  
+  for (int32_t v = 0; v < pDb->numOfVgroups; ++v) {
+    int vgIndex = (v + pDb->vgListIndex) % pDb->numOfVgroups;
+    SVgObj *pVgroup = pDb->vgList[vgIndex];
+    if (pVgroup == NULL) {
+      mError("db:%s, index:%d vgroup is null", pDb->name, vgIndex);
+      pthread_mutex_unlock(&pDb->mutex);
+      return TSDB_CODE_MND_APP_ERROR;
+    }
+
+    int32_t sid = taosAllocateId(pVgroup->idPool);
+    if (sid <= 0) {
+      mDebug("app:%p:%p, db:%s, no enough sid in vgId:%d", pMsg->rpcMsg.ahandle, pMsg, pDb->name, pVgroup->vgId);
+      continue;
+    }
+
+    *pSid = sid;
+    *ppVgroup = pVgroup;
+    pDb->vgListIndex = vgIndex;
+
+    pthread_mutex_unlock(&pDb->mutex);
+    return TSDB_CODE_SUCCESS;
+  }
+
+  int maxVgroupsPerDb = tsMaxVgroupsPerDb;
+  if (maxVgroupsPerDb <= 0) {
+    maxVgroupsPerDb = mnodeGetOnlinDnodesCpuCoreNum();
+    maxVgroupsPerDb = MAX(maxVgroupsPerDb, 2);
+  }
+
+  if (pDb->numOfVgroups < maxVgroupsPerDb) {
+    mDebug("app:%p:%p, db:%s, try to create a new vgroup, numOfVgroups:%d maxVgroupsPerDb:%d", pMsg->rpcMsg.ahandle, pMsg,
+           pDb->name, pDb->numOfVgroups, maxVgroupsPerDb);
+    pthread_mutex_unlock(&pDb->mutex);
+    int32_t code = mnodeCreateVgroup(pMsg);
+    if (code == TSDB_CODE_MND_ACTION_IN_PROGRESS) return code;
+  }
+
+  SVgObj *pVgroup = pDb->vgList[0];
+  if (pVgroup == NULL) return TSDB_CODE_MND_NO_ENOUGH_DNODES;
+
+  int32_t code = mnodeAllocVgroupIdPool(pVgroup);
+  if (code != TSDB_CODE_SUCCESS) {
+    pthread_mutex_unlock(&pDb->mutex);
+    return code;
+  }
+
+  int32_t sid = taosAllocateId(pVgroup->idPool);
+  if (sid <= 0) {
+    mError("app:%p:%p, db:%s, no enough sid in vgId:%d", pMsg->rpcMsg.ahandle, pMsg, pDb->name, pVgroup->vgId);
+    pthread_mutex_unlock(&pDb->mutex);
+    return TSDB_CODE_MND_NO_ENOUGH_DNODES;
+  }
+
+  *pSid = sid;
+  *ppVgroup = pVgroup;
+  pDb->vgListIndex = 0;
+  pthread_mutex_unlock(&pDb->mutex);
+
+  return TSDB_CODE_SUCCESS;
 }
 
 void *mnodeGetNextVgroup(void *pIter, SVgObj **pVgroup) { 
@@ -363,6 +480,10 @@ static int32_t mnodeCreateVgroupCb(SMnodeMsg *pMsg, int32_t code) {
     SSdbOper desc = {.type = SDB_OPER_GLOBAL, .pObj = pVgroup, .table = tsVgroupSdb};
     sdbDeleteRow(&desc);
     return code;
+  } else {
+    pVgroup->status = TAOS_VG_STATUS_READY;
+    SSdbOper desc = {.type = SDB_OPER_GLOBAL, .pObj = pVgroup, .table = tsVgroupSdb};
+    sdbUpdateRow(&desc);
   }
 
   mInfo("app:%p:%p, vgId:%d, is created in mnode, db:%s replica:%d", pMsg->rpcMsg.ahandle, pMsg, pVgroup->vgId,
@@ -373,13 +494,16 @@ static int32_t mnodeCreateVgroupCb(SMnodeMsg *pMsg, int32_t code) {
   }
 
   pMsg->expected = pVgroup->numOfVnodes;
+  pMsg->successed = 0;
+  pMsg->received = 0;
   mnodeSendCreateVgroupMsg(pVgroup, pMsg);
 
   return TSDB_CODE_MND_ACTION_IN_PROGRESS;
 }
 
-int32_t mnodeCreateVgroup(SMnodeMsg *pMsg, SDbObj *pDb) {
+int32_t mnodeCreateVgroup(SMnodeMsg *pMsg) {
   if (pMsg == NULL) return TSDB_CODE_MND_APP_ERROR;
+  SDbObj *pDb = pMsg->pDb;
 
   SVgObj *pVgroup = (SVgObj *)calloc(1, sizeof(SVgObj));
   tstrncpy(pVgroup->dbName, pDb->name, TSDB_ACCT_LEN + TSDB_DB_NAME_LEN);
@@ -407,7 +531,7 @@ int32_t mnodeCreateVgroup(SMnodeMsg *pMsg, SDbObj *pDb) {
   int32_t code = sdbInsertRow(&oper);
   if (code != TSDB_CODE_SUCCESS) {
     pMsg->pVgroup = NULL;
-    tfree(pVgroup);
+    mnodeDestroyVgroup(pVgroup);
   } else {
     code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
@@ -435,7 +559,7 @@ void mnodeCleanupVgroups() {
   tsVgroupSdb = NULL;
 }
 
-int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
+static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
   SDbObj *pDb = mnodeGetDb(pShow->db);
   if (pDb == NULL) {
     return TSDB_CODE_MND_DB_NOT_SELECTED;
@@ -461,29 +585,27 @@ int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
   pSchema[cols].bytes = htons(pShow->bytes[cols]);
   cols++;
 
-  int32_t maxReplica = 0;
-  SVgObj  *pVgroup   = NULL;
-  STableObj *pTable = NULL;
-  if (pShow->payloadLen > 0 ) {
-    pTable = mnodeGetTable(pShow->payload);
-    if (NULL == pTable || pTable->type == TSDB_SUPER_TABLE) {
-      mnodeDecTableRef(pTable);
-      return TSDB_CODE_MND_INVALID_TABLE_NAME;
-    }
-    mnodeDecTableRef(pTable);
-    pVgroup = mnodeGetVgroup(((SChildTableObj*)pTable)->vgId);
-    if (NULL == pVgroup) return TSDB_CODE_MND_INVALID_TABLE_NAME;
-    mnodeDecVgroupRef(pVgroup);
-    maxReplica = pVgroup->numOfVnodes > maxReplica ? pVgroup->numOfVnodes : maxReplica;
-  } else {
-    SVgObj *pVgroup = pDb->pHead;
-    while (pVgroup != NULL) {
-      maxReplica = pVgroup->numOfVnodes > maxReplica ? pVgroup->numOfVnodes : maxReplica;
-      pVgroup = pVgroup->next;
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "poolSize");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "onlineVnodes");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->maxReplica = 1;
+  for (int32_t v = 0; v < pDb->numOfVgroups; ++v) {
+    SVgObj *pVgroup = pDb->vgList[v];
+    if (pVgroup != NULL) {
+      pShow->maxReplica = pVgroup->numOfVnodes > pShow->maxReplica ? pVgroup->numOfVnodes : pShow->maxReplica;
     }
   }
 
-  for (int32_t i = 0; i < maxReplica; ++i) {
+  for (int32_t i = 0; i < pShow->maxReplica; ++i) {
     pShow->bytes[cols] = 2;
     pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
     strcpy(pSchema[cols].name, "dnode");
@@ -507,48 +629,54 @@ int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
   pShow->numOfColumns = cols;
 
   pShow->offset[0] = 0;
-  for (int32_t i = 1; i < cols; ++i) pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
-
-  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
-
-  if (NULL == pTable) {
-    pShow->numOfRows = pDb->numOfVgroups;
-    pShow->pIter = pDb->pHead;
-  } else {
-    pShow->numOfRows = 1;
-    pShow->pIter = pVgroup;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
   }
 
-   mnodeDecDbRef(pDb);
+  pShow->numOfRows = pDb->numOfVgroups;
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
 
+  mnodeDecDbRef(pDb);
   return 0;
 }
 
-int32_t mnodeRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pConn) {
+static bool mnodeFilterVgroups(SVgObj *pVgroup, STableObj *pTable) {
+  if (NULL == pTable || pTable->type == TSDB_SUPER_TABLE) {
+    return true;
+  }
+
+  SChildTableObj *pCTable = (SChildTableObj *)pTable;
+  if (pVgroup->vgId == pCTable->vgId) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+static int32_t mnodeRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pConn) {
   int32_t numOfRows = 0;
   SVgObj *pVgroup = NULL;
-  int32_t maxReplica = 0;
   int32_t cols = 0;
   char *  pWrite;
 
   SDbObj *pDb = mnodeGetDb(pShow->db);
   if (pDb == NULL) return 0;
-  
+
   if (pDb->status != TSDB_DB_STATUS_READY) {
     mError("db:%s, status:%d, in dropping", pDb->name, pDb->status);
     return 0;
   }
 
-  pVgroup = pDb->pHead;
-  while (pVgroup != NULL) {
-    maxReplica = pVgroup->numOfVnodes > maxReplica ? pVgroup->numOfVnodes : maxReplica;
-    pVgroup    = pVgroup->next;
+  STableObj *pTable = NULL;
+  if (pShow->payloadLen > 0 ) {
+    pTable = mnodeGetTable(pShow->payload);
   }
 
   while (numOfRows < rows) {
-    pVgroup = (SVgObj *) pShow->pIter;
+    pShow->pIter = mnodeGetNextVgroup(pShow->pIter, &pVgroup);
     if (pVgroup == NULL) break;
-    pShow->pIter = (void *) pVgroup->next;
+    if (pVgroup->pDb != pDb) continue;
+    if (!mnodeFilterVgroups(pVgroup, pTable)) continue;
 
     cols = 0;
 
@@ -560,7 +688,22 @@ int32_t mnodeRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pC
     *(int32_t *) pWrite = pVgroup->numOfTables;
     cols++;
 
-    for (int32_t i = 0; i < maxReplica; ++i) {
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = taosIdPoolMaxSize(pVgroup->idPool);
+    cols++;
+
+    int32_t onlineVnodes = 0;
+    for (int32_t i = 0; i < pShow->maxReplica; ++i) {
+      if (pVgroup->vnodeGid[i].role == TAOS_SYNC_ROLE_SLAVE || pVgroup->vnodeGid[i].role == TAOS_SYNC_ROLE_MASTER) {
+        onlineVnodes++;
+      }
+    }
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = onlineVnodes;
+    cols++;
+
+    for (int32_t i = 0; i < pShow->maxReplica; ++i) {
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
       *(int16_t *) pWrite = pVgroup->vnodeGid[i].dnodeId;
       cols++;
@@ -588,41 +731,39 @@ int32_t mnodeRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pC
       }
     }
 
+    mnodeDecVgroupRef(pVgroup);
     numOfRows++;
   }
 
   pShow->numOfReads += numOfRows;
+  mnodeDecTableRef(pTable);
   mnodeDecDbRef(pDb);
 
   return numOfRows;
 }
 
 void mnodeAddTableIntoVgroup(SVgObj *pVgroup, SChildTableObj *pTable) {
-  if (pTable->sid >= 1 && pVgroup->tableList[pTable->sid - 1] == NULL) {
-    pVgroup->tableList[pTable->sid - 1] = pTable;
-    taosIdPoolMarkStatus(pVgroup->idPool, pTable->sid);
-    pVgroup->numOfTables++;
-  }
-  
-  if (pVgroup->numOfTables >= pVgroup->pDb->cfg.maxTables) {
-    mnodeMoveVgroupToTail(pVgroup);
+  int32_t idPoolSize = taosIdPoolMaxSize(pVgroup->idPool);
+  if (pTable->sid > idPoolSize) {
+    mnodeAllocVgroupIdPool(pVgroup);
   }
 
-  mnodeIncVgroupRef(pVgroup);
+  if (pTable->sid >= 1) {
+    taosIdPoolMarkStatus(pVgroup->idPool, pTable->sid);
+    pVgroup->numOfTables++;
+    mnodeIncVgroupRef(pVgroup);
+  }
 }
 
 void mnodeRemoveTableFromVgroup(SVgObj *pVgroup, SChildTableObj *pTable) {
-  if (pTable->sid >= 1 && pVgroup->tableList[pTable->sid - 1] != NULL) {
-    pVgroup->tableList[pTable->sid - 1] = NULL;
+  if (pTable->sid >= 1) {
     taosFreeId(pVgroup->idPool, pTable->sid);
     pVgroup->numOfTables--;
+    mnodeDecVgroupRef(pVgroup);
   }
-
-  mnodeMoveVgroupToHead(pVgroup);
-  mnodeDecVgroupRef(pVgroup);
 }
 
-SMDCreateVnodeMsg *mnodeBuildCreateVnodeMsg(SVgObj *pVgroup) {
+static SMDCreateVnodeMsg *mnodeBuildVnodeMsg(SVgObj *pVgroup) {
   SDbObj *pDb = pVgroup->pDb;
   if (pDb == NULL) return NULL;
 
@@ -630,19 +771,23 @@ SMDCreateVnodeMsg *mnodeBuildCreateVnodeMsg(SVgObj *pVgroup) {
   if (pVnode == NULL) return NULL;
 
   strcpy(pVnode->db, pVgroup->dbName);
+  int32_t maxTables = taosIdPoolMaxSize(pVgroup->idPool);
+  //TODO: dynamic alloc tables in tsdb
+  maxTables = MAX(10000, tsMaxTablePerVnode);
 
   SMDVnodeCfg *pCfg = &pVnode->cfg;
   pCfg->vgId                = htonl(pVgroup->vgId);
   pCfg->cfgVersion          = htonl(pDb->cfgVersion);
   pCfg->cacheBlockSize      = htonl(pDb->cfg.cacheBlockSize);
   pCfg->totalBlocks         = htonl(pDb->cfg.totalBlocks);
-  pCfg->maxTables           = htonl(pDb->cfg.maxTables + 1);
+  pCfg->maxTables           = htonl(maxTables + 1);
   pCfg->daysPerFile         = htonl(pDb->cfg.daysPerFile);
   pCfg->daysToKeep          = htonl(pDb->cfg.daysToKeep);
   pCfg->daysToKeep1         = htonl(pDb->cfg.daysToKeep1);
   pCfg->daysToKeep2         = htonl(pDb->cfg.daysToKeep2);  
   pCfg->minRowsPerFileBlock = htonl(pDb->cfg.minRowsPerFileBlock);
   pCfg->maxRowsPerFileBlock = htonl(pDb->cfg.maxRowsPerFileBlock);
+  pCfg->fsyncPeriod         = htonl(pDb->cfg.fsyncPeriod);
   pCfg->commitTime          = htonl(pDb->cfg.commitTime);
   pCfg->precision           = pDb->cfg.precision;
   pCfg->compression         = pDb->cfg.compression;
@@ -685,8 +830,31 @@ SRpcIpSet mnodeGetIpSetFromIp(char *ep) {
   return ipSet;
 }
 
-void mnodeSendCreateVnodeMsg(SVgObj *pVgroup, SRpcIpSet *ipSet, void *ahandle) {
-  SMDCreateVnodeMsg *pCreate = mnodeBuildCreateVnodeMsg(pVgroup);
+static void mnodeSendAlterVnodeMsg(SVgObj *pVgroup, SRpcIpSet *ipSet) {
+  SMDAlterVnodeMsg *pAlter = mnodeBuildVnodeMsg(pVgroup);
+  SRpcMsg rpcMsg = {
+    .ahandle = NULL,
+    .pCont   = pAlter,
+    .contLen = pAlter ? sizeof(SMDAlterVnodeMsg) : 0,
+    .code    = 0,
+    .msgType = TSDB_MSG_TYPE_MD_ALTER_VNODE
+  };
+  dnodeSendMsgToDnode(ipSet, &rpcMsg);
+}
+
+void mnodeSendAlterVgroupMsg(SVgObj *pVgroup) {
+  mDebug("vgId:%d, send alter all vnodes msg, numOfVnodes:%d db:%s", pVgroup->vgId, pVgroup->numOfVnodes,
+         pVgroup->dbName);
+  for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
+    SRpcIpSet ipSet = mnodeGetIpSetFromIp(pVgroup->vnodeGid[i].pDnode->dnodeEp);
+    mDebug("vgId:%d, index:%d, send alter vnode msg to dnode %s", pVgroup->vgId, i,
+           pVgroup->vnodeGid[i].pDnode->dnodeEp);
+    mnodeSendAlterVnodeMsg(pVgroup, &ipSet);
+  }
+}
+
+static void mnodeSendCreateVnodeMsg(SVgObj *pVgroup, SRpcIpSet *ipSet, void *ahandle) {
+  SMDCreateVnodeMsg *pCreate = mnodeBuildVnodeMsg(pVgroup);
   SRpcMsg rpcMsg = {
     .ahandle = ahandle,
     .pCont   = pCreate,
@@ -708,6 +876,10 @@ void mnodeSendCreateVgroupMsg(SVgObj *pVgroup, void *ahandle) {
   }
 }
 
+static void mnodeProcessAlterVnodeRsp(SRpcMsg *rpcMsg) {
+  mDebug("alter vnode rsp received");
+}
+
 static void mnodeProcessCreateVnodeRsp(SRpcMsg *rpcMsg) {
   if (rpcMsg->ahandle == NULL) return;
 
@@ -724,6 +896,8 @@ static void mnodeProcessCreateVnodeRsp(SRpcMsg *rpcMsg) {
          pVgroup->vgId, tstrerror(rpcMsg->code), mnodeMsg->received, mnodeMsg->successed, mnodeMsg->expected,
          mnodeMsg->rpcMsg.handle, rpcMsg->ahandle);
 
+  assert(mnodeMsg->received <= mnodeMsg->expected);
+
   if (mnodeMsg->received != mnodeMsg->expected) return;
 
   if (mnodeMsg->received == mnodeMsg->successed) {
@@ -857,9 +1031,10 @@ void mnodeDropAllDnodeVgroups(SDnodeObj *pDropDnode) {
 
   sdbFreeIter(pIter);
 
-  mInfo("dnode:%d, all vgroups is dropped from sdb", pDropDnode->dnodeId);
+  mInfo("dnode:%d, all vgroups:%d is dropped from sdb", pDropDnode->dnodeId, numOfVgroups);
 }
 
+#if 0
 void mnodeUpdateAllDbVgroups(SDbObj *pAlterDb) {
   void *  pIter = NULL;
   SVgObj *pVgroup = NULL;
@@ -881,6 +1056,7 @@ void mnodeUpdateAllDbVgroups(SDbObj *pAlterDb) {
 
   mInfo("db:%s, all vgroups is updated in sdb", pAlterDb->name);
 }
+#endif
 
 void mnodeDropAllDbVgroups(SDbObj *pDropDb) {
   void *  pIter = NULL;
diff --git a/src/plugins/http/inc/httpCode.h b/src/plugins/http/inc/httpCode.h
index 0235040139..08111260e9 100644
--- a/src/plugins/http/inc/httpCode.h
+++ b/src/plugins/http/inc/httpCode.h
@@ -105,7 +105,7 @@
 #define HTTP_OP_VALUE_TYPE            79
 
 //tgf
-#define HTTP_TG_STABLE_NOT_EXIST     80
+#define HTTP_TG_STABLE_NOT_EXIST      80
 
 extern char *httpMsg[];
 
diff --git a/src/plugins/http/inc/httpInt.h b/src/plugins/http/inc/httpInt.h
index 8ca1c2ff11..ffd621be7a 100644
--- a/src/plugins/http/inc/httpInt.h
+++ b/src/plugins/http/inc/httpInt.h
@@ -61,6 +61,9 @@
 #define HTTP_CHECK_BODY_CONTINUE    0
 #define HTTP_CHECK_BODY_SUCCESS     1
 
+#define HTTP_READ_DATA_SUCCESS      0
+#define HTTP_READ_DATA_FAILED       1
+
 #define HTTP_WRITE_RETRY_TIMES      500
 #define HTTP_WRITE_WAIT_TIME_MS     5
 #define HTTP_EXPIRED_TIME           60000
diff --git a/src/plugins/http/inc/httpLog.h b/src/plugins/http/inc/httpLog.h
index f4c20a40d5..9c145a43e8 100644
--- a/src/plugins/http/inc/httpLog.h
+++ b/src/plugins/http/inc/httpLog.h
@@ -22,10 +22,10 @@ extern int32_t httpDebugFlag;
 
 #define httpFatal(...) { if (httpDebugFlag & DEBUG_FATAL) { taosPrintLog("HTP FATAL ", 255, __VA_ARGS__); }}
 #define httpError(...) { if (httpDebugFlag & DEBUG_ERROR) { taosPrintLog("HTP ERROR ", 255, __VA_ARGS__); }}
-#define httpWarn(...)  { if (httpDebugFlag & DEBUG_WARN)  { taosPrintLog("HTP WARN  ", 255, __VA_ARGS__); }}
-#define httpInfo(...)  { if (httpDebugFlag & DEBUG_INFO)  { taosPrintLog("HTP INFO  ", 255, __VA_ARGS__); }}
-#define httpDebug(...) { if (httpDebugFlag & DEBUG_DEBUG) { taosPrintLog("HTP DEBUG ", httpDebugFlag, __VA_ARGS__); }}
-#define httpTrace(...) { if (httpDebugFlag & DEBUG_TRACE) { taosPrintLog("HTP TRACE ", httpDebugFlag, __VA_ARGS__); }}
-#define httpTraceL(...){ if (httpDebugFlag & DEBUG_TRACE) { taosPrintLongString("HTP TRACE ", httpDebugFlag, __VA_ARGS__); }}
+#define httpWarn(...)  { if (httpDebugFlag & DEBUG_WARN)  { taosPrintLog("HTP WARN ", 255, __VA_ARGS__); }}
+#define httpInfo(...)  { if (httpDebugFlag & DEBUG_INFO)  { taosPrintLog("HTP ", 255, __VA_ARGS__); }}
+#define httpDebug(...) { if (httpDebugFlag & DEBUG_DEBUG) { taosPrintLog("HTP ", httpDebugFlag, __VA_ARGS__); }}
+#define httpTrace(...) { if (httpDebugFlag & DEBUG_TRACE) { taosPrintLog("HTP ", httpDebugFlag, __VA_ARGS__); }}
+#define httpTraceL(...){ if (httpDebugFlag & DEBUG_TRACE) { taosPrintLongString("HTP ", httpDebugFlag, __VA_ARGS__); }}
 
 #endif
diff --git a/src/plugins/http/inc/httpServer.h b/src/plugins/http/inc/httpServer.h
index 04dadfe04c..508baa6112 100644
--- a/src/plugins/http/inc/httpServer.h
+++ b/src/plugins/http/inc/httpServer.h
@@ -23,6 +23,6 @@ void httpCleanUpConnect();
 
 void *httpInitServer(char *ip, uint16_t port, char *label, int numOfThreads, void *fp, void *shandle);
 void httpCleanUpServer(HttpServer *pServer);
-bool httpReadDataImp(HttpContext *pContext);
+int  httpReadDataImp(HttpContext *pContext);
 
 #endif
diff --git a/src/plugins/http/src/httpContext.c b/src/plugins/http/src/httpContext.c
index 98fba9cb3b..cefcca7821 100644
--- a/src/plugins/http/src/httpContext.c
+++ b/src/plugins/http/src/httpContext.c
@@ -137,7 +137,7 @@ void httpReleaseContext(HttpContext *pContext) {
   assert(refCount >= 0);
 
   HttpContext **ppContext = pContext->ppContext;
-  httpDebug("context:%p, is releasd, data:%p refCount:%d", pContext, ppContext, refCount);
+  httpDebug("context:%p, is released, data:%p refCount:%d", pContext, ppContext, refCount);
 
   if (tsHttpServer.contextCache != NULL) {
     taosCacheRelease(tsHttpServer.contextCache, (void **)(&ppContext), false);
diff --git a/src/plugins/http/src/httpHandle.c b/src/plugins/http/src/httpHandle.c
index 2c94f61950..407d19b307 100644
--- a/src/plugins/http/src/httpHandle.c
+++ b/src/plugins/http/src/httpHandle.c
@@ -60,6 +60,7 @@ bool httpParseURL(HttpContext* pContext) {
   char* pSeek;
   char* pEnd = strchr(pParser->pLast, ' ');
   if (pEnd == NULL) {
+    httpSendErrorResp(pContext, HTTP_UNSUPPORT_URL);    
     return false;
   }
 
@@ -275,14 +276,14 @@ bool httpParseChunkedBody(HttpContext* pContext, HttpParser* pParser, bool test)
   return true;
 }
 
-bool httpReadChunkedBody(HttpContext* pContext, HttpParser* pParser) {
+int httpReadChunkedBody(HttpContext* pContext, HttpParser* pParser) {
   bool parsedOk = httpParseChunkedBody(pContext, pParser, true);
   if (parsedOk) {
     httpParseChunkedBody(pContext, pParser, false);
     return HTTP_CHECK_BODY_SUCCESS;
   } else {
     httpTrace("context:%p, fd:%d, ip:%s, chunked body not finished, continue read", pContext, pContext->fd, pContext->ipstr);
-    if (!httpReadDataImp(pContext)) {
+    if (httpReadDataImp(pContext) != HTTP_READ_DATA_SUCCESS) {
       httpError("context:%p, fd:%d, ip:%s, read chunked request error", pContext, pContext->fd, pContext->ipstr);
       return HTTP_CHECK_BODY_ERROR;
     } else {
@@ -296,7 +297,6 @@ int httpReadUnChunkedBody(HttpContext* pContext, HttpParser* pParser) {
   if (dataReadLen > pParser->data.len) {
     httpError("context:%p, fd:%d, ip:%s, un-chunked body length invalid, read size:%d dataReadLen:%d > pContext->data.len:%d",
               pContext, pContext->fd, pContext->ipstr, pContext->parser.bufsize, dataReadLen, pParser->data.len);
-    httpSendErrorResp(pContext, HTTP_PARSE_BODY_ERROR);
     return HTTP_CHECK_BODY_ERROR;
   } else if (dataReadLen < pParser->data.len) {
     httpTrace("context:%p, fd:%d, ip:%s, un-chunked body not finished, read size:%d dataReadLen:%d < pContext->data.len:%d, continue read",
@@ -358,20 +358,13 @@ bool httpParseRequest(HttpContext* pContext) {
 }
 
 int httpCheckReadCompleted(HttpContext* pContext) {
-  HttpParser *pParser = &pContext->parser;
-  if (pContext->httpChunked == HTTP_UNCUNKED) {
-    int ret = httpReadUnChunkedBody(pContext, pParser);
-    if (ret != HTTP_CHECK_BODY_SUCCESS) {
-      return ret;
-    }
-  } else {
-    int ret = httpReadChunkedBody(pContext, pParser);
-    if (ret != HTTP_CHECK_BODY_SUCCESS) {
-      return ret;
-    }
-  }
+  HttpParser* pParser = &pContext->parser;
 
-  return HTTP_CHECK_BODY_SUCCESS;
+  if (pContext->httpChunked == HTTP_UNCUNKED) {
+    return httpReadUnChunkedBody(pContext, pParser);
+  } else {
+    return httpReadChunkedBody(pContext, pParser);
+  }
 }
 
 bool httpDecodeRequest(HttpContext* pContext) {
diff --git a/src/plugins/http/src/httpServer.c b/src/plugins/http/src/httpServer.c
index dbe299cef7..177d447f10 100644
--- a/src/plugins/http/src/httpServer.c
+++ b/src/plugins/http/src/httpServer.c
@@ -69,7 +69,7 @@ void httpCleanUpConnect() {
   httpDebug("http server:%s is cleaned up", pServer->label);
 }
 
-bool httpReadDataImp(HttpContext *pContext) {
+int httpReadDataImp(HttpContext *pContext) {
   HttpParser *pParser = &pContext->parser;
 
   while (pParser->bufsize <= (HTTP_BUFFER_SIZE - HTTP_STEP_SIZE)) {
@@ -85,8 +85,7 @@ bool httpReadDataImp(HttpContext *pContext) {
       } else {
         httpError("context:%p, fd:%d, ip:%s, read from socket error:%d, close connect",
                   pContext, pContext->fd, pContext->ipstr, errno);
-        httpReleaseContext(pContext);      
-        return false;
+        return HTTP_READ_DATA_FAILED;
       }
     } else {
       pParser->bufsize += nread;
@@ -95,15 +94,13 @@ bool httpReadDataImp(HttpContext *pContext) {
     if (pParser->bufsize >= (HTTP_BUFFER_SIZE - HTTP_STEP_SIZE)) {
       httpError("context:%p, fd:%d, ip:%s, thread:%s, request big than:%d",
                 pContext, pContext->fd, pContext->ipstr, pContext->pThread->label, HTTP_BUFFER_SIZE);
-      httpSendErrorResp(pContext, HTTP_REQUSET_TOO_BIG);
-      httpNotifyContextClose(pContext);
-      return false;
+      return HTTP_REQUSET_TOO_BIG;
     }
   }
 
   pParser->buffer[pParser->bufsize] = 0;
 
-  return true;
+  return HTTP_READ_DATA_SUCCESS;
 }
 
 static bool httpDecompressData(HttpContext *pContext) {
@@ -141,8 +138,14 @@ static bool httpReadData(HttpContext *pContext) {
     httpInitContext(pContext);
   }
 
-  if (!httpReadDataImp(pContext)) {
-    httpNotifyContextClose(pContext);
+  int32_t code = httpReadDataImp(pContext);
+  if (code != HTTP_READ_DATA_SUCCESS) {
+    if (code == HTTP_READ_DATA_FAILED) {
+      httpReleaseContext(pContext);
+    } else {
+      httpSendErrorResp(pContext, code);
+      httpNotifyContextClose(pContext);
+    }
     return false;
   }
 
diff --git a/src/plugins/http/src/httpSql.c b/src/plugins/http/src/httpSql.c
index 7a515d124e..a01cb07a98 100644
--- a/src/plugins/http/src/httpSql.c
+++ b/src/plugins/http/src/httpSql.c
@@ -47,6 +47,10 @@ void httpProcessMultiSqlRetrieveCallBack(void *param, TAOS_RES *result, int numO
     }
   }
 
+  // if (tscResultsetFetchCompleted(result)) {
+  //   isContinue = false;
+  // }
+
   if (isContinue) {
     // retrieve next batch of rows
     httpDebug("context:%p, fd:%d, ip:%s, user:%s, process pos:%d, continue retrieve, numOfRows:%d, sql:%s",
@@ -75,7 +79,8 @@ void httpProcessMultiSqlCallBack(void *param, TAOS_RES *result, int code) {
   HttpContext *pContext = (HttpContext *)param;
   if (pContext == NULL) return;
 
-  HttpSqlCmds *     multiCmds = pContext->multiCmds;
+  code = taos_errno(result);  
+  HttpSqlCmds *multiCmds = pContext->multiCmds;
   HttpEncodeMethod *encode = pContext->encodeMethod;
 
   HttpSqlCmd *singleCmd = multiCmds->cmds + multiCmds->pos;
@@ -109,8 +114,8 @@ void httpProcessMultiSqlCallBack(void *param, TAOS_RES *result, int code) {
     return;
   }
 
-  int num_fields = taos_field_count(result);
-  if (num_fields == 0) {
+  bool isUpdate = tscIsUpdateQuery(result);
+  if (isUpdate) {
     // not select or show commands
     int affectRows = taos_affected_rows(result);
     httpDebug("context:%p, fd:%d, ip:%s, user:%s, process pos:%d, affect rows:%d, sql:%s",
@@ -221,9 +226,9 @@ void httpProcessSingleSqlRetrieveCallBack(void *param, TAOS_RES *result, int num
     if (numOfRows < 0) {
       httpError("context:%p, fd:%d, ip:%s, user:%s, retrieve failed, code:%s", pContext, pContext->fd, pContext->ipstr,
                 pContext->user, tstrerror(numOfRows));
-    } 
-    
-    taos_free_result(result);    
+    }
+
+    taos_free_result(result);
 
     if (encode->stopJsonFp) {
       (encode->stopJsonFp)(pContext, &pContext->singleCmd);
@@ -238,6 +243,7 @@ void httpProcessSingleSqlCallBack(void *param, TAOS_RES *result, int unUsedCode)
   if (pContext == NULL) return;
 
   int32_t code = taos_errno(result);
+
   HttpEncodeMethod *encode = pContext->encodeMethod;
 
   if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
diff --git a/src/plugins/monitor/src/monitorMain.c b/src/plugins/monitor/src/monitorMain.c
index 36468b3fdb..22cb111b83 100644
--- a/src/plugins/monitor/src/monitorMain.c
+++ b/src/plugins/monitor/src/monitorMain.c
@@ -30,10 +30,10 @@
 
 #define monitorFatal(...) { if (monitorDebugFlag & DEBUG_FATAL) { taosPrintLog("MON FATAL ", 255, __VA_ARGS__); }}
 #define monitorError(...) { if (monitorDebugFlag & DEBUG_ERROR) { taosPrintLog("MON ERROR ", 255, __VA_ARGS__); }}
-#define monitorWarn(...)  { if (monitorDebugFlag & DEBUG_WARN)  { taosPrintLog("MON WARN  ", 255, __VA_ARGS__); }}
-#define monitorInfo(...)  { if (monitorDebugFlag & DEBUG_INFO)  { taosPrintLog("MON INFO  ", 255, __VA_ARGS__); }}
-#define monitorDebug(...) { if (monitorDebugFlag & DEBUG_DEBUG) { taosPrintLog("MON DEBUG ", monitorDebugFlag, __VA_ARGS__); }}
-#define monitorTrace(...) { if (monitorDebugFlag & DEBUG_TRACE) { taosPrintLog("MON TRACE ", monitorDebugFlag, __VA_ARGS__); }}
+#define monitorWarn(...)  { if (monitorDebugFlag & DEBUG_WARN)  { taosPrintLog("MON WARN ", 255, __VA_ARGS__); }}
+#define monitorInfo(...)  { if (monitorDebugFlag & DEBUG_INFO)  { taosPrintLog("MON ", 255, __VA_ARGS__); }}
+#define monitorDebug(...) { if (monitorDebugFlag & DEBUG_DEBUG) { taosPrintLog("MON ", monitorDebugFlag, __VA_ARGS__); }}
+#define monitorTrace(...) { if (monitorDebugFlag & DEBUG_TRACE) { taosPrintLog("MON ", monitorDebugFlag, __VA_ARGS__); }}
 
 #define SQL_LENGTH     1024
 #define LOG_LEN_STR    100
diff --git a/src/plugins/mqtt/inc/mqttLog.h b/src/plugins/mqtt/inc/mqttLog.h
index 5d5f98a13b..e186b81112 100644
--- a/src/plugins/mqtt/inc/mqttLog.h
+++ b/src/plugins/mqtt/inc/mqttLog.h
@@ -22,9 +22,9 @@ extern int32_t mqttDebugFlag;
 
 #define mqttFatal(...) { if (mqttDebugFlag & DEBUG_FATAL) { taosPrintLog("MQT FATAL ", 255, __VA_ARGS__); }}
 #define mqttError(...) { if (mqttDebugFlag & DEBUG_ERROR) { taosPrintLog("MQT ERROR ", 255, __VA_ARGS__); }}
-#define mqttWarn(...)  { if (mqttDebugFlag & DEBUG_WARN)  { taosPrintLog("MQT WARN  ", 255, __VA_ARGS__); }}
-#define mqttInfo(...)  { if (mqttDebugFlag & DEBUG_INFO)  { taosPrintLog("MQT INFO  ", 255, __VA_ARGS__); }}
-#define mqttDebug(...) { if (mqttDebugFlag & DEBUG_DEBUG) { taosPrintLog("MQT DEBUG ", mqttDebugFlag, __VA_ARGS__); }}
-#define mqttTrace(...) { if (mqttDebugFlag & DEBUG_TRACE) { taosPrintLog("MQT TRACE ", mqttDebugFlag, __VA_ARGS__); }}
+#define mqttWarn(...)  { if (mqttDebugFlag & DEBUG_WARN)  { taosPrintLog("MQT WARN ", 255, __VA_ARGS__); }}
+#define mqttInfo(...)  { if (mqttDebugFlag & DEBUG_INFO)  { taosPrintLog("MQT ", 255, __VA_ARGS__); }}
+#define mqttDebug(...) { if (mqttDebugFlag & DEBUG_DEBUG) { taosPrintLog("MQT ", mqttDebugFlag, __VA_ARGS__); }}
+#define mqttTrace(...) { if (mqttDebugFlag & DEBUG_TRACE) { taosPrintLog("MQT ", mqttDebugFlag, __VA_ARGS__); }}
 
 #endif
diff --git a/src/query/inc/qExecutor.h b/src/query/inc/qExecutor.h
index 6cd6edd6db..f77036ef9d 100644
--- a/src/query/inc/qExecutor.h
+++ b/src/query/inc/qExecutor.h
@@ -24,7 +24,7 @@
 #include "qtsbuf.h"
 #include "taosdef.h"
 #include "tarray.h"
-#include "tref.h"
+#include "tlockfree.h"
 #include "tsdb.h"
 #include "tsqlfunction.h"
 #include "query.h"
@@ -121,6 +121,7 @@ typedef struct SQueryCostInfo {
   uint32_t loadBlockStatis;
   uint32_t discardBlocks;
   uint64_t elapsedTime;
+  uint64_t ioTime;
   uint64_t computTime;
 } SQueryCostInfo;
 
@@ -192,7 +193,6 @@ typedef struct SQInfo {
   int32_t          offset;  // offset in group result set of subgroup, todo refactor
   SArray*          arrTableIdInfo;
 
-  T_REF_DECLARE()
   /*
    * the query is executed position on which meter of the whole list.
    * when the index reaches the last one of the list, it means the query is completed.
@@ -201,8 +201,6 @@ typedef struct SQInfo {
    */
   int32_t          tableIndex;
   int32_t          numOfGroupResultPages;
-  _qinfo_free_fn_t freeFn;  //todo remove it
-
   void*     pBuf; // allocated buffer for STableQueryInfo, sizeof(STableQueryInfo)*numOfTables;
 
 } SQInfo;
diff --git a/src/query/inc/qUtil.h b/src/query/inc/qUtil.h
index 9b818b367f..8fe3c0f495 100644
--- a/src/query/inc/qUtil.h
+++ b/src/query/inc/qUtil.h
@@ -37,7 +37,7 @@ SWindowResult *getWindowResult(SWindowResInfo *pWindowResInfo, int32_t slot);
 #define curTimeWindow(_winres)  ((_winres)->curIndex)
 bool isWindowResClosed(SWindowResInfo *pWindowResInfo, int32_t slot);
 
-void createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool isSTableQuery, SPosInfo *posInfo, size_t interBufSize);
+int32_t createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool isSTableQuery, SPosInfo *posInfo, size_t interBufSize);
 
 char *getPosInResultPage(SQueryRuntimeEnv *pRuntimeEnv, int32_t columnIndex, SWindowResult *pResult);
 
diff --git a/src/query/inc/qsqlparser.h b/src/query/inc/qsqlparser.h
index 704f3e7418..9e8706cf92 100644
--- a/src/query/inc/qsqlparser.h
+++ b/src/query/inc/qsqlparser.h
@@ -116,6 +116,7 @@ typedef struct SCreateDBInfo {
   int32_t   daysPerFile;
   int32_t   minRowsPerBlock;
   int32_t   maxRowsPerBlock;
+  int32_t   fsyncPeriod;
   int64_t   commitTime;
   int32_t   walLevel;
   int32_t   compressionLevel;
diff --git a/src/query/inc/qtsbuf.h b/src/query/inc/qtsbuf.h
index e437e1c4e5..59b224e096 100644
--- a/src/query/inc/qtsbuf.h
+++ b/src/query/inc/qtsbuf.h
@@ -107,7 +107,7 @@ STSBuf* tsBufCreate(bool autoDelete, int32_t order);
 STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete);
 STSBuf* tsBufCreateFromCompBlocks(const char* pData, int32_t numOfBlocks, int32_t len, int32_t tsOrder);
 
-void* tsBufDestory(STSBuf* pTSBuf);
+void* tsBufDestroy(STSBuf* pTSBuf);
 
 void    tsBufAppend(STSBuf* pTSBuf, int32_t vnodeId, int64_t tag, const char* pData, int32_t len);
 int32_t tsBufMerge(STSBuf* pDestBuf, const STSBuf* pSrcBuf, int32_t vnodeIdx);
diff --git a/src/query/inc/queryLog.h b/src/query/inc/queryLog.h
index fd1322e995..a1c447a6eb 100644
--- a/src/query/inc/queryLog.h
+++ b/src/query/inc/queryLog.h
@@ -27,10 +27,10 @@ extern int32_t tscEmbedded;
 
 #define qFatal(...) { if (qDebugFlag & DEBUG_FATAL) { taosPrintLog("QRY FATAL ", 255, __VA_ARGS__); }}
 #define qError(...) { if (qDebugFlag & DEBUG_ERROR) { taosPrintLog("QRY ERROR ", 255, __VA_ARGS__); }}
-#define qWarn(...)  { if (qDebugFlag & DEBUG_WARN)  { taosPrintLog("QRY WARN  ", 255, __VA_ARGS__); }}
-#define qInfo(...)  { if (qDebugFlag & DEBUG_INFO)  { taosPrintLog("QRY INFO  ", 255, __VA_ARGS__); }}
-#define qDebug(...) { if (qDebugFlag & DEBUG_DEBUG) { taosPrintLog("QRY DEBUG ", qDebugFlag, __VA_ARGS__); }}
-#define qTrace(...) { if (qDebugFlag & DEBUG_TRACE) { taosPrintLog("QRY TRACE ", qDebugFlag, __VA_ARGS__); }}
+#define qWarn(...)  { if (qDebugFlag & DEBUG_WARN)  { taosPrintLog("QRY WARN ", 255, __VA_ARGS__); }}
+#define qInfo(...)  { if (qDebugFlag & DEBUG_INFO)  { taosPrintLog("QRY ", 255, __VA_ARGS__); }}
+#define qDebug(...) { if (qDebugFlag & DEBUG_DEBUG) { taosPrintLog("QRY ", qDebugFlag, __VA_ARGS__); }}
+#define qTrace(...) { if (qDebugFlag & DEBUG_TRACE) { taosPrintLog("QRY ", qDebugFlag, __VA_ARGS__); }}
 
 #ifdef __cplusplus
 }
diff --git a/src/query/inc/sql.y b/src/query/inc/sql.y
index b4ea1254b7..d709b4f838 100644
--- a/src/query/inc/sql.y
+++ b/src/query/inc/sql.y
@@ -221,6 +221,7 @@ maxrows(Y) ::= MAXROWS INTEGER(X).            { Y = X; }
 blocks(Y)  ::= BLOCKS INTEGER(X).             { Y = X; }
 ctime(Y)   ::= CTIME INTEGER(X).              { Y = X; }
 wal(Y)     ::= WAL INTEGER(X).                { Y = X; }
+fsync(Y)   ::= FSYNC INTEGER(X).              { Y = X; }
 comp(Y)    ::= COMP INTEGER(X).               { Y = X; }
 prec(Y)    ::= PRECISION STRING(X).           { Y = X; }
 
@@ -236,6 +237,7 @@ db_optr(Y) ::= db_optr(Z) maxrows(X).        { Y = Z; Y.maxRowsPerBlock = strtod
 db_optr(Y) ::= db_optr(Z) blocks(X).         { Y = Z; Y.numOfBlocks = strtol(X.z, NULL, 10); }
 db_optr(Y) ::= db_optr(Z) ctime(X).          { Y = Z; Y.commitTime = strtol(X.z, NULL, 10); }
 db_optr(Y) ::= db_optr(Z) wal(X).            { Y = Z; Y.walLevel = strtol(X.z, NULL, 10); }
+db_optr(Y) ::= db_optr(Z) fsync(X).          { Y = Z; Y.fsyncPeriod = strtol(X.z, NULL, 10); }
 db_optr(Y) ::= db_optr(Z) comp(X).           { Y = Z; Y.compressionLevel = strtol(X.z, NULL, 10); }
 db_optr(Y) ::= db_optr(Z) prec(X).           { Y = Z; Y.precision = X; }
 db_optr(Y) ::= db_optr(Z) keep(X).           { Y = Z; Y.keep = X; }
@@ -249,6 +251,7 @@ alter_db_optr(Y) ::= alter_db_optr(Z) keep(X).        { Y = Z; Y.keep = X; }
 alter_db_optr(Y) ::= alter_db_optr(Z) blocks(X).      { Y = Z; Y.numOfBlocks = strtol(X.z, NULL, 10); }
 alter_db_optr(Y) ::= alter_db_optr(Z) comp(X).        { Y = Z; Y.compressionLevel = strtol(X.z, NULL, 10); }
 alter_db_optr(Y) ::= alter_db_optr(Z) wal(X).         { Y = Z; Y.walLevel = strtol(X.z, NULL, 10); }
+alter_db_optr(Y) ::= alter_db_optr(Z) fsync(X).       { Y = Z; Y.fsyncPeriod = strtod(X.z, NULL, 10); }
 
 %type typename {TAOS_FIELD}
 typename(A) ::= ids(X). { 
diff --git a/src/query/inc/tsqlfunction.h b/src/query/inc/tsqlfunction.h
index 63b7abb379..e57cb26456 100644
--- a/src/query/inc/tsqlfunction.h
+++ b/src/query/inc/tsqlfunction.h
@@ -125,7 +125,8 @@ typedef struct SArithmeticSupport {
 } SArithmeticSupport;
 
 typedef struct SQLPreAggVal {
-  bool    isSet;
+  bool        isSet;             // statistics info set or not
+  bool        dataBlockLoaded;   // data block is loaded or not
   SDataStatis statis;
 } SQLPreAggVal;
 
@@ -187,7 +188,7 @@ typedef struct SQLFunctionCtx {
 } SQLFunctionCtx;
 
 typedef struct SQLAggFuncElem {
-  char aName[TSDB_FUNCTIONS_NAME_MAX_LENGTH];
+  char     aName[TSDB_FUNCTIONS_NAME_MAX_LENGTH];
 
   uint8_t  nAggIdx;       // index of function in aAggs
   int8_t   stableFuncId;  // transfer function for super table query
@@ -224,25 +225,14 @@ int32_t getResultDataInfo(int32_t dataType, int32_t dataBytes, int32_t functionI
 #define IS_SINGLEOUTPUT(x)        (((x)&TSDB_FUNCSTATE_SO) != 0)
 #define IS_OUTER_FORWARD(x)       (((x)&TSDB_FUNCSTATE_OF) != 0)
 
-/*
- * the status of one block, used in metric query. all blocks are mixed together,
- * we need the status to decide if one block is a first/end/inter block of one meter
- */
-enum {
-  BLK_FILE_BLOCK = 0x1,
-  BLK_BLOCK_LOADED = 0x2,
-  BLK_CACHE_BLOCK = 0x4,  // in case of cache block, block must be loaded
-};
-
 /* determine the real data need to calculated the result */
 enum {
-  BLK_DATA_NO_NEEDED = 0x0,
+  BLK_DATA_NO_NEEDED     = 0x0,
   BLK_DATA_STATIS_NEEDED = 0x1,
-  BLK_DATA_ALL_NEEDED = 0x3,
+  BLK_DATA_ALL_NEEDED    = 0x3,
+  BLK_DATA_DISCARD       = 0x4,   // discard current data block since it is not qualified for filter
 };
 
-#define SET_DATA_BLOCK_NOT_LOADED(x) ((x) &= (~BLK_BLOCK_LOADED));
-
 typedef struct STwaInfo {
   TSKEY   lastKey;
   int8_t  hasResult;  // flag to denote has value
@@ -264,12 +254,9 @@ typedef struct STwaInfo {
 /* global sql function array */
 extern struct SQLAggFuncElem aAggs[];
 
-/* compatible check array list */
-extern int32_t funcCompatDefList[];
+extern int32_t functionCompatList[]; // compatible check array list
 
-bool top_bot_datablock_filter(SQLFunctionCtx *pCtx, int32_t functionId, char *minval, char *maxval);
-
-bool stableQueryFunctChanged(int32_t funcId);
+bool topbot_datablock_filter(SQLFunctionCtx *pCtx, int32_t functionId, const char *minval, const char *maxval);
 
 void resetResultInfo(SResultInfo *pResInfo);
 void setResultInfoBuf(SResultInfo *pResInfo, int32_t size, bool superTable, char* buf);
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 53a32a2356..77e7321d3d 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -44,7 +44,7 @@
 #define SET_MASTER_SCAN_FLAG(runtime)  ((runtime)->scanFlag = MASTER_SCAN)
 #define SET_REVERSE_SCAN_FLAG(runtime) ((runtime)->scanFlag = REVERSE_SCAN)
 
-#define GET_QINFO_ADDR(x) ((void *)((char *)(x)-offsetof(SQInfo, runtimeEnv)))
+#define GET_QINFO_ADDR(x) ((SQInfo *)((char *)(x)-offsetof(SQInfo, runtimeEnv)))
 
 #define GET_COL_DATA_POS(query, index, step) ((query)->pos + (index) * (step))
 #define SWITCH_ORDER(n) (((n) = ((n) == TSDB_ORDER_ASC) ? TSDB_ORDER_DESC : TSDB_ORDER_ASC))
@@ -120,6 +120,7 @@ static UNUSED_FUNC void* u_calloc(size_t num, size_t __size) {
 #define GET_TABLEGROUP(q, _index)   ((SArray*) taosArrayGetP((q)->tableqinfoGroupInfo.pGroupList, (_index)))
 
 static void setQueryStatus(SQuery *pQuery, int8_t status);
+static void finalizeQueryResult(SQueryRuntimeEnv *pRuntimeEnv);
 
 #define QUERY_IS_INTERVAL_QUERY(_q) ((_q)->intervalTime > 0)
 
@@ -351,27 +352,6 @@ static bool hasTagValOutput(SQuery* pQuery) {
   return false;
 }
 
-static SDataStatis *getStatisInfo(SQuery *pQuery, SDataStatis *pStatis, int32_t numOfCols, int32_t index) {
-  // for a tag column, no corresponding field info
-  SColIndex *pColIndex = &pQuery->pSelectExpr[index].base.colInfo;
-  if (TSDB_COL_IS_TAG(pColIndex->flag)) {
-    return NULL;
-  }
-  
-  /*
-   * Choose the right column field info by field id, since the file block may be out of date,
-   * which means the newest table schema is not equalled to the schema of this block.
-   * TODO: speedup by using bsearch
-   */
-  for (int32_t i = 0; i < numOfCols; ++i) {
-    if (pColIndex->colId == pStatis[i].colId) {
-      return &pStatis[i];
-    }
-  }
-  
-  return NULL;
-}
-
 /**
  * @param pQuery
  * @param col
@@ -380,19 +360,14 @@ static SDataStatis *getStatisInfo(SQuery *pQuery, SDataStatis *pStatis, int32_t
  * @param pColStatis
  * @return
  */
-static bool hasNullValue(SQuery *pQuery, int32_t col, int32_t numOfCols, SDataStatis *pStatis, SDataStatis **pColStatis) {
-  SColIndex *pColIndex = &pQuery->pSelectExpr[col].base.colInfo;
-  if (TSDB_COL_IS_TAG(pColIndex->flag)) {
-    return false;
-  }
-
-  // query on primary timestamp column, not null value at all
-  if (pColIndex->colId == PRIMARYKEY_TIMESTAMP_COL_INDEX) {
+static bool hasNullValue(SColIndex* pColIndex, SDataStatis *pStatis, SDataStatis **pColStatis) {
+  if (TSDB_COL_IS_TAG(pColIndex->flag) || pColIndex->colId == PRIMARYKEY_TIMESTAMP_COL_INDEX) {
     return false;
   }
 
   if (pStatis != NULL) {
-    *pColStatis = getStatisInfo(pQuery, pStatis, numOfCols, col);
+    *pColStatis = &pStatis[pColIndex->colIndex];
+    assert((*pColStatis)->colId == pColIndex->colId);
   } else {
     *pColStatis = NULL;
   }
@@ -842,8 +817,8 @@ static char *getDataBlock(SQueryRuntimeEnv *pRuntimeEnv, SArithmeticSupport *sas
   if (pDataBlock == NULL) {
     return NULL;
   }
-  char *dataBlock = NULL;
 
+  char *dataBlock = NULL;
   SQuery *pQuery = pRuntimeEnv->pQuery;
   SQLFunctionCtx *pCtx = pRuntimeEnv->pCtx;
 
@@ -864,6 +839,7 @@ static char *getDataBlock(SQueryRuntimeEnv *pRuntimeEnv, SArithmeticSupport *sas
     sas->data    = calloc(pQuery->numOfCols, POINTER_BYTES);
 
     if (sas->data == NULL) {
+      finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
       longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
     }
 
@@ -887,10 +863,14 @@ static char *getDataBlock(SQueryRuntimeEnv *pRuntimeEnv, SArithmeticSupport *sas
 
   } else {  // other type of query function
     SColIndex *pCol = &pQuery->pSelectExpr[col].base.colInfo;
-    if (TSDB_COL_IS_TAG(pCol->flag) || pDataBlock == NULL) {
+    if (TSDB_COL_IS_TAG(pCol->flag)) {
       dataBlock = NULL;
     } else {
-      dataBlock = getDataBlockImpl(pDataBlock, pCol->colId);
+      SColIndex* pColIndex = &pQuery->pSelectExpr[col].base.colInfo;
+      SColumnInfoData *p = taosArrayGet(pDataBlock, pColIndex->colIndex);
+      assert(p->info.colId == pColIndex->colId);
+
+      dataBlock = p->pData;
     }
   }
 
@@ -922,6 +902,7 @@ static void blockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *
 
   SArithmeticSupport *sasArray = calloc((size_t)pQuery->numOfOutput, sizeof(SArithmeticSupport));
   if (sasArray == NULL) {
+    finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
     longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
@@ -1168,6 +1149,7 @@ static void rowwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *pS
 
   SArithmeticSupport *sasArray = calloc((size_t)pQuery->numOfOutput, sizeof(SArithmeticSupport));
   if (sasArray == NULL) {
+    finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
     longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
@@ -1365,7 +1347,7 @@ void setExecParams(SQuery *pQuery, SQLFunctionCtx *pCtx, void* inputData, TSKEY
   int32_t colId = pQuery->pSelectExpr[colIndex].base.colInfo.colId;
   
   SDataStatis *tpField = NULL;
-  pCtx->hasNull = hasNullValue(pQuery, colIndex, pBlockInfo->numOfCols, pStatis, &tpField);
+  pCtx->hasNull = hasNullValue(&pQuery->pSelectExpr[colIndex].base.colInfo, pStatis, &tpField);
   pCtx->aInputElemBuf = inputData;
 
   if (tpField != NULL) {
@@ -1376,6 +1358,8 @@ void setExecParams(SQuery *pQuery, SQLFunctionCtx *pCtx, void* inputData, TSKEY
     pCtx->preAggVals.isSet = false;
   }
 
+  pCtx->preAggVals.dataBlockLoaded = (inputData != NULL);
+
   // limit/offset query will affect this value
   pCtx->startOffset = QUERY_IS_ASC_QUERY(pQuery) ? pQuery->pos:0;
   pCtx->size = QUERY_IS_ASC_QUERY(pQuery) ? pBlockInfo->rows - pQuery->pos : pQuery->pos + 1;
@@ -1619,22 +1603,21 @@ static void teardownQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv) {
   tsdbCleanupQueryHandle(pRuntimeEnv->pQueryHandle);
   tsdbCleanupQueryHandle(pRuntimeEnv->pSecQueryHandle);
 
-  pRuntimeEnv->pTSBuf = tsBufDestory(pRuntimeEnv->pTSBuf);
+  pRuntimeEnv->pTSBuf = tsBufDestroy(pRuntimeEnv->pTSBuf);
 }
 
-static bool isQueryKilled(SQInfo *pQInfo) {
-  return (pQInfo->code == TSDB_CODE_TSC_QUERY_CANCELLED);
-}
+#define IS_QUERY_KILLED(_q) ((_q)->code == TSDB_CODE_TSC_QUERY_CANCELLED)
 
 static void setQueryKilled(SQInfo *pQInfo) { pQInfo->code = TSDB_CODE_TSC_QUERY_CANCELLED; }
 
-static bool isFixedOutputQuery(SQuery *pQuery) {
-  if (pQuery->intervalTime != 0) {
+static bool isFixedOutputQuery(SQueryRuntimeEnv* pRuntimeEnv) {
+  SQuery* pQuery = pRuntimeEnv->pQuery;
+  if (QUERY_IS_INTERVAL_QUERY(pQuery)) {
     return false;
   }
 
   // Note:top/bottom query is fixed output query
-  if (isTopBottomQuery(pQuery) || isGroupbyNormalCol(pQuery->pGroupbyExpr)) {
+  if (pRuntimeEnv->topBotQuery || pRuntimeEnv->groupbyNormalCol) {
     return true;
   }
 
@@ -1947,73 +1930,46 @@ char *getPosInResultPage(SQueryRuntimeEnv *pRuntimeEnv, int32_t columnIndex, SWi
          pQuery->pSelectExpr[columnIndex].bytes * realRowId;
 }
 
-/**
- * decrease the refcount for each table involved in this query
- * @param pQInfo
- */
-UNUSED_FUNC void vnodeDecMeterRefcnt(SQInfo *pQInfo) {
-  if (pQInfo != NULL) {
-    //    assert(taosHashGetSize(pQInfo->tableqinfoGroupInfo) >= 1);
-  }
+#define IS_PREFILTER_TYPE(_t) ((_t) != TSDB_DATA_TYPE_BINARY && (_t) != TSDB_DATA_TYPE_NCHAR)
 
-#if 0
-  if (pQInfo == NULL || pQInfo->tableqinfoGroupInfo.numOfTables == 1) {
-    atomic_fetch_sub_32(&pQInfo->pObj->numOfQueries, 1);
-    qDebug("QInfo:%p vid:%d sid:%d meterId:%s, query is over, numOfQueries:%d", pQInfo, pQInfo->pObj->vnode,
-           pQInfo->pObj->sid, pQInfo->pObj->meterId, pQInfo->pObj->numOfQueries);
-  } else {
-    int32_t num = 0;
-    for (int32_t i = 0; i < pQInfo->tableqinfoGroupInfo.numOfTables; ++i) {
-      SMeterObj *pMeter = getMeterObj(pQInfo->tableqinfoGroupInfo, pQInfo->pSidSet->pTableIdList[i]->sid);
-      atomic_fetch_sub_32(&(pMeter->numOfQueries), 1);
-
-      if (pMeter->numOfQueries > 0) {
-        qDebug("QInfo:%p vid:%d sid:%d meterId:%s, query is over, numOfQueries:%d", pQInfo, pMeter->vnode, pMeter->sid,
-               pMeter->meterId, pMeter->numOfQueries);
-        num++;
-      }
-    }
-
-    /*
-     * in order to reduce log output, for all meters of which numOfQueries count are 0,
-     * we do not output corresponding information
-     */
-    num = pQInfo->tableqinfoGroupInfo.numOfTables - num;
-    qDebug("QInfo:%p metric query is over, dec query ref for %d meters, numOfQueries on %d meters are 0", pQInfo,
-           pQInfo->tableqinfoGroupInfo.numOfTables, num);
-  }
-#endif
-}
-
-static bool needToLoadDataBlock(SQuery *pQuery, SDataStatis *pDataStatis, SQLFunctionCtx *pCtx,
-                                int32_t numOfTotalPoints) {
-  if (pDataStatis == NULL) {
+static bool needToLoadDataBlock(SQueryRuntimeEnv* pRuntimeEnv, SDataStatis *pDataStatis, SQLFunctionCtx *pCtx,
+    int32_t numOfRows) {
+  SQuery* pQuery = pRuntimeEnv->pQuery;
+  if (pDataStatis == NULL || (pQuery->numOfFilterCols == 0 && (!pRuntimeEnv->topBotQuery))) {
     return true;
   }
 
-#if 0
   for (int32_t k = 0; k < pQuery->numOfFilterCols; ++k) {
     SSingleColumnFilterInfo *pFilterInfo = &pQuery->pFilterInfo[k];
-    int32_t                  colIndex = pFilterInfo->info.colIndex;
 
-    // this column not valid in current data block
-    if (colIndex < 0 || pDataStatis[colIndex].colId != pFilterInfo->info.data.colId) {
-      continue;
+    int32_t index = -1;
+    for(int32_t i = 0; i < pQuery->numOfCols; ++i) {
+      if (pDataStatis[i].colId == pFilterInfo->info.colId) {
+        index = i;
+        break;
+      }
+    }
+
+    // no statistics data
+    if (index == -1) {
+      return true;
     }
 
     // not support pre-filter operation on binary/nchar data type
-    if (!vnodeSupportPrefilter(pFilterInfo->info.data.type)) {
-      continue;
+    if (!IS_PREFILTER_TYPE(pFilterInfo->info.type)) {
+      return true;
     }
 
     // all points in current column are NULL, no need to check its boundary value
-    if (pDataStatis[colIndex].numOfNull == numOfTotalPoints) {
+    if (pDataStatis[index].numOfNull == numOfRows) {
       continue;
     }
 
-    if (pFilterInfo->info.info.type == TSDB_DATA_TYPE_FLOAT) {
-      float minval = *(double *)(&pDataStatis[colIndex].min);
-      float maxval = *(double *)(&pDataStatis[colIndex].max);
+    SDataStatis* pDataBlockst = &pDataStatis[index];
+
+    if (pFilterInfo->info.type == TSDB_DATA_TYPE_FLOAT) {
+      float minval = *(double *)(&pDataBlockst->min);
+      float maxval = *(double *)(&pDataBlockst->max);
 
       for (int32_t i = 0; i < pFilterInfo->numOfFilters; ++i) {
         if (pFilterInfo->pFilters[i].fp(&pFilterInfo->pFilters[i], (char *)&minval, (char *)&maxval)) {
@@ -2022,54 +1978,50 @@ static bool needToLoadDataBlock(SQuery *pQuery, SDataStatis *pDataStatis, SQLFun
       }
     } else {
       for (int32_t i = 0; i < pFilterInfo->numOfFilters; ++i) {
-        if (pFilterInfo->pFilters[i].fp(&pFilterInfo->pFilters[i], (char *)&pDataStatis[colIndex].min,
-                                        (char *)&pDataStatis[colIndex].max)) {
+        if (pFilterInfo->pFilters[i].fp(&pFilterInfo->pFilters[i], (char *)&pDataBlockst->min, (char *)&pDataBlockst->max)) {
           return true;
         }
       }
     }
   }
 
-  // todo disable this opt code block temporarily
-  //  for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
-  //    int32_t functId = pQuery->pSelectExpr[i].base.functionId;
-  //    if (functId == TSDB_FUNC_TOP || functId == TSDB_FUNC_BOTTOM) {
-  //      return top_bot_datablock_filter(&pCtx[i], functId, (char *)&pField[i].min, (char *)&pField[i].max);
-  //    }
-  //  }
-
-#endif
-  return true;
-}
-
-SArray *loadDataBlockOnDemand(SQueryRuntimeEnv *pRuntimeEnv, void* pQueryHandle, SDataBlockInfo* pBlockInfo, SDataStatis **pStatis) {
-  SQuery *pQuery = pRuntimeEnv->pQuery;
-
-  uint32_t r = 0;
-  SArray * pDataBlock = NULL;
-
-  if (pQuery->numOfFilterCols > 0) {
-    r = BLK_DATA_ALL_NEEDED;
-  } else {
-    // check if this data block is required to load
+  if (pRuntimeEnv->topBotQuery) {
     for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
-      SSqlFuncMsg* pSqlFunc = &pQuery->pSelectExpr[i].base;
-      
-      int32_t functionId = pSqlFunc->functionId;
-      int32_t colId = pSqlFunc->colInfo.colId;
-      r |= aAggs[functionId].dataReqFunc(&pRuntimeEnv->pCtx[i], pQuery->window.skey, pQuery->window.ekey, colId);
-    }
-
-    if (pRuntimeEnv->pTSBuf > 0 || QUERY_IS_INTERVAL_QUERY(pQuery)) {
-      r |= BLK_DATA_ALL_NEEDED;
+      int32_t functionId = pQuery->pSelectExpr[i].base.functionId;
+      if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM) {
+        return topbot_datablock_filter(&pCtx[i], functionId, (char *)&pDataStatis[i].min, (char *)&pDataStatis[i].max);
+      }
     }
   }
 
-  if (r == BLK_DATA_NO_NEEDED) {
-    qDebug("QInfo:%p data block discard, brange:%" PRId64 "-%" PRId64 ", rows:%d", GET_QINFO_ADDR(pRuntimeEnv),
+  return false;
+}
+
+int32_t loadDataBlockOnDemand(SQueryRuntimeEnv *pRuntimeEnv, void* pQueryHandle, SDataBlockInfo* pBlockInfo, SDataStatis **pStatis, SArray** pDataBlock) {
+  SQuery *pQuery = pRuntimeEnv->pQuery;
+
+  uint32_t status = 0;
+  if (pQuery->numOfFilterCols > 0) {
+    status = BLK_DATA_ALL_NEEDED;
+  } else { // check if this data block is required to load
+    for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
+      SSqlFuncMsg* pSqlFunc = &pQuery->pSelectExpr[i].base;
+
+      int32_t functionId = pSqlFunc->functionId;
+      int32_t colId = pSqlFunc->colInfo.colId;
+      status |= aAggs[functionId].dataReqFunc(&pRuntimeEnv->pCtx[i], pBlockInfo->window.skey, pBlockInfo->window.ekey, colId);
+    }
+
+    if (pRuntimeEnv->pTSBuf > 0 || QUERY_IS_INTERVAL_QUERY(pQuery)) {
+      status |= BLK_DATA_ALL_NEEDED;
+    }
+  }
+
+  if (status == BLK_DATA_NO_NEEDED) {
+    qDebug("QInfo:%p data block discard, brange:%"PRId64 "-%"PRId64", rows:%d", GET_QINFO_ADDR(pRuntimeEnv),
            pBlockInfo->window.skey, pBlockInfo->window.ekey, pBlockInfo->rows);
     pRuntimeEnv->summary.discardBlocks += 1;
-  } else if (r == BLK_DATA_STATIS_NEEDED) {
+  } else if (status == BLK_DATA_STATIS_NEEDED) {
     if (tsdbRetrieveDataBlockStatisInfo(pQueryHandle, pStatis) != TSDB_CODE_SUCCESS) {
       //        return DISK_DATA_LOAD_FAILED;
     }
@@ -2077,32 +2029,34 @@ SArray *loadDataBlockOnDemand(SQueryRuntimeEnv *pRuntimeEnv, void* pQueryHandle,
     pRuntimeEnv->summary.loadBlockStatis += 1;
   
     if (*pStatis == NULL) { // data block statistics does not exist, load data block
-      pDataBlock = tsdbRetrieveDataBlock(pQueryHandle, NULL);
+      *pDataBlock = tsdbRetrieveDataBlock(pQueryHandle, NULL);
       pRuntimeEnv->summary.totalCheckedRows += pBlockInfo->rows;
     }
   } else {
-    assert(r == BLK_DATA_ALL_NEEDED);
+    assert(status == BLK_DATA_ALL_NEEDED);
   
     // load the data block statistics to perform further filter
-    pRuntimeEnv->summary.loadBlockStatis +=1;
+    pRuntimeEnv->summary.loadBlockStatis += 1;
     if (tsdbRetrieveDataBlockStatisInfo(pQueryHandle, pStatis) != TSDB_CODE_SUCCESS) {
     }
     
-    if (!needToLoadDataBlock(pQuery,*pStatis, pRuntimeEnv->pCtx, pBlockInfo->rows)) {
+    if (!needToLoadDataBlock(pRuntimeEnv, *pStatis, pRuntimeEnv->pCtx, pBlockInfo->rows)) {
 #if defined(_DEBUG_VIEW)
       qDebug("QInfo:%p block discarded by per-filter", GET_QINFO_ADDR(pRuntimeEnv));
 #endif
       // current block has been discard due to filter applied
       pRuntimeEnv->summary.discardBlocks += 1;
-      //        return DISK_DATA_DISCARDED;
+      qDebug("QInfo:%p data block discard, brange:%"PRId64 "-%"PRId64", rows:%d", GET_QINFO_ADDR(pRuntimeEnv),
+          pBlockInfo->window.skey, pBlockInfo->window.ekey, pBlockInfo->rows);
+      return BLK_DATA_DISCARD;
     }
   
     pRuntimeEnv->summary.totalCheckedRows += pBlockInfo->rows;
     pRuntimeEnv->summary.loadBlocks += 1;
-    pDataBlock = tsdbRetrieveDataBlock(pQueryHandle, NULL);
+    *pDataBlock = tsdbRetrieveDataBlock(pQueryHandle, NULL);
   }
 
-  return pDataBlock;
+  return TSDB_CODE_SUCCESS;
 }
 
 int32_t binarySearchForKey(char *pValue, int num, TSKEY key, int order) {
@@ -2199,7 +2153,7 @@ static void ensureOutputBufferSimple(SQueryRuntimeEnv* pRuntimeEnv, int32_t capa
 static void ensureOutputBuffer(SQueryRuntimeEnv* pRuntimeEnv, SDataBlockInfo* pBlockInfo) {
   // in case of prj/diff query, ensure the output buffer is sufficient to accommodate the results of current block
   SQuery* pQuery = pRuntimeEnv->pQuery;
-  if (!QUERY_IS_INTERVAL_QUERY(pQuery) && !pRuntimeEnv->groupbyNormalCol && !isFixedOutputQuery(pQuery)) {
+  if (!QUERY_IS_INTERVAL_QUERY(pQuery) && !pRuntimeEnv->groupbyNormalCol && !isFixedOutputQuery(pRuntimeEnv)) {
     SResultRec *pRec = &pQuery->rec;
     
     if (pQuery->rec.capacity - pQuery->rec.rows < pBlockInfo->rows) {
@@ -2245,12 +2199,20 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
          pQuery->order.order);
 
   TsdbQueryHandleT pQueryHandle = IS_MASTER_SCAN(pRuntimeEnv)? pRuntimeEnv->pQueryHandle : pRuntimeEnv->pSecQueryHandle;
+  int32_t step = GET_FORWARD_DIRECTION_FACTOR(pQuery->order.order);
 
   SDataBlockInfo blockInfo = SDATA_BLOCK_INITIALIZER;
-  while (tsdbNextDataBlock(pQueryHandle)) {
+  while (true) {
+    if (!tsdbNextDataBlock(pQueryHandle)) {
+      if (terrno != TSDB_CODE_SUCCESS) {
+        longjmp(pRuntimeEnv->env, terrno);
+      }
+      break;
+    }
     summary->totalBlocks += 1;
-    if (isQueryKilled(GET_QINFO_ADDR(pRuntimeEnv))) {
-      return 0;
+
+    if (IS_QUERY_KILLED(GET_QINFO_ADDR(pRuntimeEnv))) {
+      longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
     }
 
     tsdbRetrieveDataBlockInfo(pQueryHandle, &blockInfo);
@@ -2277,7 +2239,11 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
     ensureOutputBuffer(pRuntimeEnv, &blockInfo);
 
     SDataStatis *pStatis = NULL;
-    SArray *pDataBlock = loadDataBlockOnDemand(pRuntimeEnv, pQueryHandle, &blockInfo, &pStatis);
+    SArray *pDataBlock   = NULL;
+    if (loadDataBlockOnDemand(pRuntimeEnv, pQueryHandle, &blockInfo, &pStatis, &pDataBlock) == BLK_DATA_DISCARD) {
+      pQuery->current->lastKey = QUERY_IS_ASC_QUERY(pQuery)? blockInfo.window.ekey + step:blockInfo.window.skey + step;
+      continue;
+    }
 
     // query start position can not move into tableApplyFunctionsOnBlock due to limit/offset condition
     pQuery->pos = QUERY_IS_ASC_QUERY(pQuery)? 0 : blockInfo.rows - 1;
@@ -2300,8 +2266,6 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
 
   if (QUERY_IS_INTERVAL_QUERY(pQuery) && IS_MASTER_SCAN(pRuntimeEnv)) {
     if (Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
-//      int32_t step = QUERY_IS_ASC_QUERY(pQuery) ? QUERY_ASC_FORWARD_STEP : QUERY_DESC_FORWARD_STEP;
-
       closeAllTimeWindow(&pRuntimeEnv->windowResInfo);
 //      removeRedundantWindow(&pRuntimeEnv->windowResInfo, pTableQueryInfo->lastKey - step, step);
       pRuntimeEnv->windowResInfo.curIndex = pRuntimeEnv->windowResInfo.size - 1;  // point to the last time window
@@ -2996,16 +2960,23 @@ void switchCtxOrder(SQueryRuntimeEnv *pRuntimeEnv) {
   }
 }
 
-void createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool isSTableQuery, SPosInfo *posInfo, size_t interBufSize) {
+int32_t createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool isSTableQuery, SPosInfo *posInfo, size_t interBufSize) {
   int32_t numOfCols = pQuery->numOfOutput;
 
   pResultRow->resultInfo = calloc((size_t)numOfCols, sizeof(SResultInfo));
+  if (pResultRow->resultInfo == NULL) {
+    return TSDB_CODE_QRY_OUT_OF_MEMORY;
+  }
   pResultRow->pos = *posInfo;
 
   char* buf = calloc(1, interBufSize);
+  if (buf == NULL) {
+    return TSDB_CODE_QRY_OUT_OF_MEMORY;
+  }
 
   // set the intermediate result output buffer
   setWindowResultInfo(pResultRow->resultInfo, pQuery, isSTableQuery, buf);
+  return TSDB_CODE_SUCCESS;
 }
 
 void resetCtxOutputBuf(SQueryRuntimeEnv *pRuntimeEnv) {
@@ -3223,6 +3194,9 @@ static void setEnvBeforeReverseScan(SQueryRuntimeEnv *pRuntimeEnv, SQueryStatusI
 
   // add ref for table
   pRuntimeEnv->pSecQueryHandle = tsdbQueryTables(pQInfo->tsdb, &cond, &pQInfo->tableGroupInfo, pQInfo);
+  if (pRuntimeEnv->pSecQueryHandle == NULL) {
+    longjmp(pRuntimeEnv->env, terrno);
+  }
 
   setQueryStatus(pQuery, QUERY_NOT_COMPLETED);
   switchCtxOrder(pRuntimeEnv);
@@ -3295,6 +3269,9 @@ void scanOneTableDataBlocks(SQueryRuntimeEnv *pRuntimeEnv, TSKEY start) {
     }
 
     pRuntimeEnv->pSecQueryHandle = tsdbQueryTables(pQInfo->tsdb, &cond, &pQInfo->tableGroupInfo, pQInfo);
+    if (pRuntimeEnv->pSecQueryHandle == NULL) {
+      longjmp(pRuntimeEnv->env, terrno);
+    }
     pRuntimeEnv->windowResInfo.curIndex = qstatus.windowIndex;
 
     setQueryStatus(pQuery, QUERY_NOT_COMPLETED);
@@ -3304,8 +3281,9 @@ void scanOneTableDataBlocks(SQueryRuntimeEnv *pRuntimeEnv, TSKEY start) {
         cond.twindow.skey, cond.twindow.ekey);
 
     // check if query is killed or not
-    if (isQueryKilled(pQInfo)) {
-      return;
+    if (IS_QUERY_KILLED(pQInfo)) {
+      finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
+      longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
     }
   }
 
@@ -3385,7 +3363,10 @@ static STableQueryInfo *createTableQueryInfo(SQueryRuntimeEnv *pRuntimeEnv, void
   if (QUERY_IS_INTERVAL_QUERY(pQuery) || pRuntimeEnv->groupbyNormalCol) {
     int32_t initialSize = 16;
     int32_t initialThreshold = 100;
-    initWindowResInfo(&pTableQueryInfo->windowResInfo, pRuntimeEnv, initialSize, initialThreshold, TSDB_DATA_TYPE_INT);
+    int32_t code = initWindowResInfo(&pTableQueryInfo->windowResInfo, pRuntimeEnv, initialSize, initialThreshold, TSDB_DATA_TYPE_INT);
+    if (code != TSDB_CODE_SUCCESS) {
+      return NULL;
+    }
   } else { // in other aggregate query, do not initialize the windowResInfo
   }
 
@@ -3400,12 +3381,10 @@ void destroyTableQueryInfo(STableQueryInfo *pTableQueryInfo, int32_t numOfCols)
   cleanupTimeWindowInfo(&pTableQueryInfo->windowResInfo, numOfCols);
 }
 
-#define SET_CURRENT_QUERY_TABLE_INFO(_runtime, _tableInfo)                                      \
-  do {                                                                                          \
-    SQuery *_query = (_runtime)->pQuery;                                                        \
-    _query->current = _tableInfo;                                                               \
-    assert((((_tableInfo)->lastKey >= (_tableInfo)->win.skey) && QUERY_IS_ASC_QUERY(_query)) || \
-           (((_tableInfo)->lastKey <= (_tableInfo)->win.skey) && !QUERY_IS_ASC_QUERY(_query))); \
+#define CHECK_QUERY_TIME_RANGE(_q, _tableInfo)                                              \
+  do {                                                                                      \
+    assert((((_tableInfo)->lastKey >= (_tableInfo)->win.skey) && QUERY_IS_ASC_QUERY(_q)) || \
+           (((_tableInfo)->lastKey <= (_tableInfo)->win.skey) && !QUERY_IS_ASC_QUERY(_q))); \
   } while (0)
 
 /**
@@ -3695,28 +3674,29 @@ void copyFromWindowResToSData(SQInfo *pQInfo, SWindowResInfo *pResultInfo) {
   assert(pQuery->rec.rows <= pQuery->rec.capacity);
 }
 
-static void updateWindowResNumOfRes(SQueryRuntimeEnv *pRuntimeEnv, STableQueryInfo *pTableQueryInfo) {
+static void updateWindowResNumOfRes(SQueryRuntimeEnv *pRuntimeEnv) {
   SQuery *pQuery = pRuntimeEnv->pQuery;
 
   // update the number of result for each, only update the number of rows for the corresponding window result.
-  if (!QUERY_IS_INTERVAL_QUERY(pQuery)) {
+  if (QUERY_IS_INTERVAL_QUERY(pQuery)) {
+    return;
+  }
 
-    for (int32_t i = 0; i < pRuntimeEnv->windowResInfo.size; ++i) {
-      SWindowResult *pResult = &pRuntimeEnv->windowResInfo.pResult[i];
+  for (int32_t i = 0; i < pRuntimeEnv->windowResInfo.size; ++i) {
+    SWindowResult *pResult = &pRuntimeEnv->windowResInfo.pResult[i];
 
-      for (int32_t j = 0; j < pQuery->numOfOutput; ++j) {
-        int32_t functionId = pRuntimeEnv->pCtx[j].functionId;
-        if (functionId == TSDB_FUNC_TS || functionId == TSDB_FUNC_TAG || functionId == TSDB_FUNC_TAGPRJ) {
-          continue;
-        }
-
-        pResult->numOfRows = MAX(pResult->numOfRows, pResult->resultInfo[j].numOfRes);
+    for (int32_t j = 0; j < pQuery->numOfOutput; ++j) {
+      int32_t functionId = pRuntimeEnv->pCtx[j].functionId;
+      if (functionId == TSDB_FUNC_TS || functionId == TSDB_FUNC_TAG || functionId == TSDB_FUNC_TAGPRJ) {
+        continue;
       }
+
+      pResult->numOfRows = MAX(pResult->numOfRows, pResult->resultInfo[j].numOfRes);
     }
   }
 }
 
-void stableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBlockInfo *pDataBlockInfo, SDataStatis *pStatis,
+static void stableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBlockInfo *pDataBlockInfo, SDataStatis *pStatis,
     SArray *pDataBlock, __block_search_fn_t searchFn) {
   SQuery *         pQuery = pRuntimeEnv->pQuery;
   STableQueryInfo* pTableQueryInfo = pQuery->current;
@@ -3729,8 +3709,6 @@ void stableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBlockInfo *
   } else {
     blockwiseApplyFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, searchFn, pDataBlock);
   }
-
-  updateWindowResNumOfRes(pRuntimeEnv, pTableQueryInfo);
 }
 
 bool queryHasRemainResults(SQueryRuntimeEnv* pRuntimeEnv) {
@@ -3877,9 +3855,10 @@ static void queryCostStatis(SQInfo *pQInfo) {
 //      pQInfo, pSummary->readDiskBlocks, pSummary->totalBlockSize, pSummary->loadBlocksUs / 1000.0,
 //      pSummary->skippedFileBlocks, pSummary->totalGenData);
   
-  qDebug("QInfo:%p :cost summary: elpased time:%"PRId64" us, total blocks:%d, use block statis:%d, use block data:%d, "
-         "total rows:%"PRId64 ", check rows:%"PRId64, pQInfo, pSummary->elapsedTime, pSummary->totalBlocks,
-         pSummary->loadBlockStatis, pSummary->loadBlocks, pSummary->totalRows, pSummary->totalCheckedRows);
+  qDebug("QInfo:%p :cost summary: elapsed time:%"PRId64" us, io time:%"PRId64" us, total blocks:%d, load block statis:%d,"
+         " load data block:%d, total rows:%"PRId64 ", check rows:%"PRId64,
+         pQInfo, pSummary->elapsedTime, pSummary->ioTime, pSummary->totalBlocks, pSummary->loadBlockStatis,
+         pSummary->loadBlocks, pSummary->totalRows, pSummary->totalCheckedRows);
 
 //  qDebug("QInfo:%p cost: temp file:%d Bytes", pQInfo, pSummary->tmpBufferInDisk);
 //
@@ -3949,9 +3928,17 @@ void skipBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
   TsdbQueryHandleT pQueryHandle = pRuntimeEnv->pQueryHandle;
 
   SDataBlockInfo blockInfo = SDATA_BLOCK_INITIALIZER;
-  while (tsdbNextDataBlock(pQueryHandle)) {
-    if (isQueryKilled(GET_QINFO_ADDR(pRuntimeEnv))) {
-      return;
+  while (true) {
+    if (!tsdbNextDataBlock(pQueryHandle)) {
+      if (terrno != TSDB_CODE_SUCCESS) {
+        longjmp(pRuntimeEnv->env, terrno);
+      }
+      break;
+    }
+
+    if (IS_QUERY_KILLED(GET_QINFO_ADDR(pRuntimeEnv))) {
+      finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
+      longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
     }
 
     tsdbRetrieveDataBlockInfo(pQueryHandle, &blockInfo);
@@ -3992,7 +3979,14 @@ static bool skipTimeInterval(SQueryRuntimeEnv *pRuntimeEnv, TSKEY* start) {
   STableQueryInfo *pTableQueryInfo = pQuery->current;
 
   SDataBlockInfo blockInfo = SDATA_BLOCK_INITIALIZER;
-  while (tsdbNextDataBlock(pRuntimeEnv->pQueryHandle)) {
+  while (true) {
+    if (!tsdbNextDataBlock(pRuntimeEnv->pQueryHandle)) {
+      if (terrno != TSDB_CODE_SUCCESS) {
+        longjmp(pRuntimeEnv->env, terrno);
+      }
+      break;
+    }
+
     tsdbRetrieveDataBlockInfo(pRuntimeEnv->pQueryHandle, &blockInfo);
 
     if (QUERY_IS_ASC_QUERY(pQuery)) {
@@ -4091,16 +4085,16 @@ static bool skipTimeInterval(SQueryRuntimeEnv *pRuntimeEnv, TSKEY* start) {
   return true;
 }
 
-static void setupQueryHandle(void* tsdb, SQInfo* pQInfo, bool isSTableQuery) {
+static int32_t setupQueryHandle(void* tsdb, SQInfo* pQInfo, bool isSTableQuery) {
   SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
   SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
 
   if (onlyQueryTags(pQuery)) {
-    return;
+    return TSDB_CODE_SUCCESS;
   }
 
-  if (isSTableQuery && (!QUERY_IS_INTERVAL_QUERY(pQuery)) && (!isFixedOutputQuery(pQuery))) {
-    return;
+  if (isSTableQuery && (!QUERY_IS_INTERVAL_QUERY(pQuery)) && (!isFixedOutputQuery(pRuntimeEnv))) {
+    return TSDB_CODE_SUCCESS;
   }
 
   STsdbQueryCond cond = {
@@ -4115,13 +4109,14 @@ static void setupQueryHandle(void* tsdb, SQInfo* pQInfo, bool isSTableQuery) {
     && (cond.order == TSDB_ORDER_ASC) 
     && (!QUERY_IS_INTERVAL_QUERY(pQuery))
     && (!isGroupbyNormalCol(pQuery->pGroupbyExpr))
-    && (!isFixedOutputQuery(pQuery))
+    && (!isFixedOutputQuery(pRuntimeEnv))
   ) {
     SArray* pa = GET_TABLEGROUP(pQInfo, 0);
     STableQueryInfo* pCheckInfo = taosArrayGetP(pa, 0);
     cond.twindow = pCheckInfo->win;
   }
 
+  terrno = TSDB_CODE_SUCCESS;
   if (isFirstLastRowQuery(pQuery)) {
     pRuntimeEnv->pQueryHandle = tsdbQueryLastRow(tsdb, &cond, &pQInfo->tableGroupInfo, pQInfo);
   } else if (isPointInterpoQuery(pQuery)) {
@@ -4129,6 +4124,7 @@ static void setupQueryHandle(void* tsdb, SQInfo* pQInfo, bool isSTableQuery) {
   } else {
     pRuntimeEnv->pQueryHandle = tsdbQueryTables(tsdb, &cond, &pQInfo->tableGroupInfo, pQInfo);
   }
+  return terrno;
 }
 
 static SFillColInfo* taosCreateFillColInfo(SQuery* pQuery) {
@@ -4158,11 +4154,17 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
   SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
 
   SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
+
   pQuery->precision = tsdbGetCfg(tsdb)->precision;
+  pRuntimeEnv->topBotQuery = isTopBottomQuery(pQuery);
+  pRuntimeEnv->hasTagResults = hasTagValOutput(pQuery);
 
   setScanLimitationByResultBuffer(pQuery);
   changeExecuteScanOrder(pQInfo, false);
-  setupQueryHandle(tsdb, pQInfo, isSTableQuery);
+  code = setupQueryHandle(tsdb, pQInfo, isSTableQuery);
+  if (code != TSDB_CODE_SUCCESS) {
+    return code;
+  }
   
   pQInfo->tsdb = tsdb;
   pQInfo->vgId = vgId;
@@ -4203,7 +4205,10 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
         type = TSDB_DATA_TYPE_INT;  // group id
       }
 
-      initWindowResInfo(&pRuntimeEnv->windowResInfo, pRuntimeEnv, 32, 4096, type);
+      code = initWindowResInfo(&pRuntimeEnv->windowResInfo, pRuntimeEnv, 32, 4096, type);
+      if (code != TSDB_CODE_SUCCESS) {
+        return code;
+      }
     }
 
   } else if (pRuntimeEnv->groupbyNormalCol || QUERY_IS_INTERVAL_QUERY(pQuery)) {
@@ -4220,7 +4225,10 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
       type = TSDB_DATA_TYPE_TIMESTAMP;
     }
 
-    initWindowResInfo(&pRuntimeEnv->windowResInfo, pRuntimeEnv, rows, 4096, type);
+    code = initWindowResInfo(&pRuntimeEnv->windowResInfo, pRuntimeEnv, rows, 4096, type);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
+    }
   }
 
   if (pQuery->fillType != TSDB_FILL_NONE && !isPointInterpoQuery(pQuery)) {
@@ -4236,10 +4244,6 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
                                               pQuery->fillType, pColInfo);
   }
 
-  // todo refactor
-  pRuntimeEnv->topBotQuery = isTopBottomQuery(pQuery);
-  pRuntimeEnv->hasTagResults = hasTagValOutput(pQuery);
-
   setQueryStatus(pQuery, QUERY_NOT_COMPLETED);
   return TSDB_CODE_SUCCESS;
 }
@@ -4255,6 +4259,23 @@ static void enableExecutionForNextTable(SQueryRuntimeEnv *pRuntimeEnv) {
   }
 }
 
+static FORCE_INLINE void setEnvForEachBlock(SQInfo* pQInfo, STableQueryInfo* pTableQueryInfo, SDataBlockInfo* pBlockInfo) {
+  SQueryRuntimeEnv* pRuntimeEnv = &pQInfo->runtimeEnv;
+  SQuery* pQuery = pQInfo->runtimeEnv.pQuery;
+  int32_t step = GET_FORWARD_DIRECTION_FACTOR(pQuery->order.order);
+
+  if (!QUERY_IS_INTERVAL_QUERY(pQuery)) {
+    setExecutionContext(pQInfo, pTableQueryInfo->groupIndex, pBlockInfo->window.ekey + step);
+  } else {  // interval query
+    TSKEY nextKey = pBlockInfo->window.skey;
+    setIntervalQueryRange(pQInfo, nextKey);
+
+    if (pRuntimeEnv->hasTagResults || pRuntimeEnv->pTSBuf != NULL) {
+      setAdditionalInfo(pQInfo, pTableQueryInfo->pTable, pTableQueryInfo);
+    }
+  }
+}
+
 static int64_t scanMultiTableDataBlocks(SQInfo *pQInfo) {
   SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
   SQuery*           pQuery = pRuntimeEnv->pQuery;
@@ -4265,36 +4286,41 @@ static int64_t scanMultiTableDataBlocks(SQInfo *pQInfo) {
   TsdbQueryHandleT pQueryHandle = IS_MASTER_SCAN(pRuntimeEnv)? pRuntimeEnv->pQueryHandle : pRuntimeEnv->pSecQueryHandle;
   SDataBlockInfo blockInfo = SDATA_BLOCK_INITIALIZER;
 
-  while (tsdbNextDataBlock(pQueryHandle)) {
-    summary->totalBlocks += 1;
-    if (isQueryKilled(pQInfo)) {
+  int32_t step = GET_FORWARD_DIRECTION_FACTOR(pQuery->order.order);
+
+  while (true) {
+    if (!tsdbNextDataBlock(pQueryHandle)) {
+      if (terrno != TSDB_CODE_SUCCESS) {
+        longjmp(pRuntimeEnv->env, terrno);
+      }
       break;
     }
 
+    summary->totalBlocks += 1;
+    
+    if (IS_QUERY_KILLED(pQInfo)) {
+      longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
+    }
+
     tsdbRetrieveDataBlockInfo(pQueryHandle, &blockInfo);
     STableQueryInfo **pTableQueryInfo = (STableQueryInfo**) taosHashGet(pQInfo->tableqinfoGroupInfo.map, &blockInfo.tid, sizeof(blockInfo.tid));
     if(pTableQueryInfo == NULL) {
       break;
     }
 
-    assert(*pTableQueryInfo != NULL);
-    SET_CURRENT_QUERY_TABLE_INFO(pRuntimeEnv, *pTableQueryInfo);
-
-    SDataStatis *pStatis = NULL;
-    SArray *pDataBlock = loadDataBlockOnDemand(pRuntimeEnv, pQueryHandle, &blockInfo, &pStatis);
+    pQuery->current = *pTableQueryInfo;
+    CHECK_QUERY_TIME_RANGE(pQuery, *pTableQueryInfo);
 
     if (!pRuntimeEnv->groupbyNormalCol) {
-      if (!QUERY_IS_INTERVAL_QUERY(pQuery)) {
-        int32_t step = QUERY_IS_ASC_QUERY(pQuery)? 1:-1;
-        setExecutionContext(pQInfo, (*pTableQueryInfo)->groupIndex, blockInfo.window.ekey + step);
-      } else {  // interval query
-        TSKEY nextKey = blockInfo.window.skey;
-        setIntervalQueryRange(pQInfo, nextKey);
+      setEnvForEachBlock(pQInfo, *pTableQueryInfo, &blockInfo);
+    }
 
-        if (pRuntimeEnv->hasTagResults || pRuntimeEnv->pTSBuf != NULL) {
-          setAdditionalInfo(pQInfo, (*pTableQueryInfo)->pTable, *pTableQueryInfo);
-        }
-      }
+    SDataStatis *pStatis = NULL;
+    SArray *pDataBlock = NULL;
+
+    if (loadDataBlockOnDemand(pRuntimeEnv, pQueryHandle, &blockInfo, &pStatis, &pDataBlock) == BLK_DATA_DISCARD) {
+      pQuery->current->lastKey = QUERY_IS_ASC_QUERY(pQuery)? blockInfo.window.ekey + step:blockInfo.window.skey + step;
+      continue;
     }
 
     summary->totalRows += blockInfo.rows;
@@ -4304,6 +4330,8 @@ static int64_t scanMultiTableDataBlocks(SQInfo *pQInfo) {
            pQInfo, blockInfo.uid, blockInfo.tid, blockInfo.window.skey, blockInfo.window.ekey, blockInfo.rows, pQuery->current->lastKey);
   }
 
+  updateWindowResNumOfRes(pRuntimeEnv);
+
   int64_t et = taosGetTimestampMs();
   return et - st;
 }
@@ -4316,7 +4344,9 @@ static bool multiTableMultioutputHelper(SQInfo *pQInfo, int32_t index) {
   SArray *group = GET_TABLEGROUP(pQInfo, 0);
   STableQueryInfo* pCheckInfo = taosArrayGetP(group, index);
 
-  setTagVal(pRuntimeEnv, pCheckInfo->pTable, pQInfo->tsdb);
+  if (pRuntimeEnv->hasTagResults || pRuntimeEnv->pTSBuf != NULL) {
+    setTagVal(pRuntimeEnv, pCheckInfo->pTable, pQInfo->tsdb);
+  }
 
   STableId* id = TSDB_TABLEID(pCheckInfo->pTable);
   qDebug("QInfo:%p query on (%d): uid:%" PRIu64 ", tid:%d, qrange:%" PRId64 "-%" PRId64, pQInfo, index,
@@ -4346,6 +4376,9 @@ static bool multiTableMultioutputHelper(SQInfo *pQInfo, int32_t index) {
   pRuntimeEnv->pQueryHandle = tsdbQueryTables(pQInfo->tsdb, &cond, &gp, pQInfo);
   taosArrayDestroy(tx);
   taosArrayDestroy(g1);
+  if (pRuntimeEnv->pQueryHandle == NULL) {
+    longjmp(pRuntimeEnv->env, terrno);
+  }
 
   if (pRuntimeEnv->pTSBuf != NULL) {
     if (pRuntimeEnv->cur.vgroupIndex == -1) {
@@ -4413,6 +4446,12 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
       } else {
         pRuntimeEnv->pQueryHandle = tsdbQueryRowsInExternalWindow(pQInfo->tsdb, &cond, &gp, pQInfo);
       }
+
+      taosArrayDestroy(tx);
+      taosArrayDestroy(g1);
+      if (pRuntimeEnv->pQueryHandle == NULL) {
+        longjmp(pRuntimeEnv->env, terrno);
+      }
       
       initCtxOutputBuf(pRuntimeEnv);
       
@@ -4477,6 +4516,9 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
       pRuntimeEnv->pQueryHandle = tsdbQueryTables(pQInfo->tsdb, &cond, &gp, pQInfo);
       taosArrayDestroy(g1);
       taosArrayDestroy(tx);
+      if (pRuntimeEnv->pQueryHandle == NULL) {
+        longjmp(pRuntimeEnv->env, terrno);
+      }
 
       SArray* s = tsdbGetQueriedTableList(pRuntimeEnv->pQueryHandle);
       assert(taosArrayGetSize(s) >= 1);
@@ -4549,8 +4591,8 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
            1 == taosArrayGetSize(pQInfo->tableqinfoGroupInfo.pGroupList));
 
     while (pQInfo->tableIndex < pQInfo->tableqinfoGroupInfo.numOfTables) {
-      if (isQueryKilled(pQInfo)) {
-        return;
+      if (IS_QUERY_KILLED(pQInfo)) {
+        longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
       }
 
       pQuery->current = taosArrayGetP(group, pQInfo->tableIndex);
@@ -4672,6 +4714,9 @@ static void doSaveContext(SQInfo *pQInfo) {
 
   pRuntimeEnv->prevGroupId = INT32_MIN;
   pRuntimeEnv->pSecQueryHandle = tsdbQueryTables(pQInfo->tsdb, &cond, &pQInfo->tableGroupInfo, pQInfo);
+  if (pRuntimeEnv->pSecQueryHandle == NULL) {
+    longjmp(pRuntimeEnv->env, terrno);
+  }
   
   setQueryStatus(pQuery, QUERY_NOT_COMPLETED);
   switchCtxOrder(pRuntimeEnv);
@@ -4744,9 +4789,10 @@ static void multiTableQueryProcess(SQInfo *pQInfo) {
   qDebug("QInfo:%p master scan completed, elapsed time: %" PRId64 "ms, reverse scan start", pQInfo, el);
 
   // query error occurred or query is killed, abort current execution
-  if (pQInfo->code != TSDB_CODE_SUCCESS || isQueryKilled(pQInfo)) {
+  if (pQInfo->code != TSDB_CODE_SUCCESS || IS_QUERY_KILLED(pQInfo)) {
     qDebug("QInfo:%p query killed or error occurred, code:%s, abort", pQInfo, tstrerror(pQInfo->code));
-    return;
+    finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
+    longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
   }
 
   // close all time window results
@@ -4766,9 +4812,10 @@ static void multiTableQueryProcess(SQInfo *pQInfo) {
 
   setQueryStatus(pQuery, QUERY_COMPLETED);
 
-  if (pQInfo->code != TSDB_CODE_SUCCESS || isQueryKilled(pQInfo)) {
+  if (pQInfo->code != TSDB_CODE_SUCCESS || IS_QUERY_KILLED(pQInfo)) {
     qDebug("QInfo:%p query killed or error occurred, code:%s, abort", pQInfo, tstrerror(pQInfo->code));
-    return;
+    finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
+    longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
   }
 
   if (QUERY_IS_INTERVAL_QUERY(pQuery) || isSumAvgRateQuery(pQuery)) {
@@ -4806,8 +4853,9 @@ static void tableFixedOutputProcess(SQInfo *pQInfo, STableQueryInfo* pTableInfo)
   scanOneTableDataBlocks(pRuntimeEnv, pTableInfo->lastKey);
   finalizeQueryResult(pRuntimeEnv);
 
-  if (isQueryKilled(pQInfo)) {
-    return;
+  if (IS_QUERY_KILLED(pQInfo)) {
+    finalizeQueryResult(pRuntimeEnv); // clean up allocated resource during query
+    longjmp(pRuntimeEnv->env, TSDB_CODE_TSC_QUERY_CANCELLED);
   }
 
   // since the numOfRows must be identical for all sql functions that are allowed to be executed simutaneously.
@@ -4839,10 +4887,6 @@ static void tableMultiOutputProcess(SQInfo *pQInfo, STableQueryInfo* pTableInfo)
     scanOneTableDataBlocks(pRuntimeEnv, pQuery->current->lastKey);
     finalizeQueryResult(pRuntimeEnv);
 
-    if (isQueryKilled(pQInfo)) {
-      return;
-    }
-
     pQuery->rec.rows = getNumOfResult(pRuntimeEnv);
     if (pQuery->limit.offset > 0 && pQuery->numOfFilterCols > 0 && pQuery->rec.rows > 0) {
       skipResults(pRuntimeEnv);
@@ -4887,10 +4931,6 @@ static void tableIntervalProcessImpl(SQueryRuntimeEnv *pRuntimeEnv, TSKEY start)
   while (1) {
     scanOneTableDataBlocks(pRuntimeEnv, start);
 
-    if (isQueryKilled(GET_QINFO_ADDR(pRuntimeEnv))) {
-      return;
-    }
-
     assert(!Q_STATUS_EQUAL(pQuery->status, QUERY_NOT_COMPLETED));
     finalizeQueryResult(pRuntimeEnv);
 
@@ -5024,7 +5064,7 @@ static void tableQueryImpl(SQInfo *pQInfo) {
   // group by normal column, sliding window query, interval query are handled by interval query processor
   if (QUERY_IS_INTERVAL_QUERY(pQuery) || pRuntimeEnv->groupbyNormalCol) {  // interval (down sampling operation)
     tableIntervalProcess(pQInfo, item);
-  } else if (isFixedOutputQuery(pQuery)) {
+  } else if (isFixedOutputQuery(pRuntimeEnv)) {
     tableFixedOutputProcess(pQInfo, item);
   } else {  // diff/add/multiply/subtract/division
     assert(pQuery->checkBuffer == 1);
@@ -5044,7 +5084,7 @@ static void stableQueryImpl(SQInfo *pQInfo) {
   int64_t st = taosGetTimestampUs();
 
   if (QUERY_IS_INTERVAL_QUERY(pQuery) ||
-      (isFixedOutputQuery(pQuery) && (!isPointInterpoQuery(pQuery)) && !pRuntimeEnv->groupbyNormalCol &&
+      (isFixedOutputQuery(pRuntimeEnv) && (!isPointInterpoQuery(pQuery)) && !pRuntimeEnv->groupbyNormalCol &&
       !isFirstLastRowQuery(pQuery))) {
     multiTableQueryProcess(pQInfo);
   } else {
@@ -5052,6 +5092,7 @@ static void stableQueryImpl(SQInfo *pQInfo) {
             isFirstLastRowQuery(pQuery) || pRuntimeEnv->groupbyNormalCol);
 
     sequentialTableProcess(pQInfo);
+
   }
 
   // record the total elapsed time
@@ -5383,10 +5424,11 @@ static int32_t buildAirthmeticExprFromMsg(SExprInfo *pArithExprInfo, SQueryTable
   qDebug("qmsg:%p create arithmetic expr from binary string: %s", pQueryMsg, pArithExprInfo->base.arg[0].argValue.pz);
 
   tExprNode* pExprNode = NULL;
-  TRY(32) {
+  TRY(TSDB_MAX_TAGS) {
     pExprNode = exprTreeFromBinary(pArithExprInfo->base.arg[0].argValue.pz, pArithExprInfo->base.arg[0].argBytes);
   } CATCH( code ) {
     CLEANUP_EXECUTE();
+    qError("qmsg:%p failed to create arithmetic expression string from:%s, reason: %s", pQueryMsg, pArithExprInfo->base.arg[0].argValue.pz, tstrerror(code));
     return code;
   } END_TRY
 
@@ -5644,17 +5686,23 @@ static void freeQInfo(SQInfo *pQInfo);
 
 static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList, SSqlGroupbyExpr *pGroupbyExpr, SExprInfo *pExprs,
                                STableGroupInfo *pTableGroupInfo, SColumnInfo* pTagCols) {
-  SQInfo *pQInfo = (SQInfo *)calloc(1, sizeof(SQInfo));
-  if (pQInfo == NULL) {
-    return NULL;
-  }
-
-  SQuery *pQuery = calloc(1, sizeof(SQuery));
-  pQInfo->runtimeEnv.pQuery = pQuery;
-
   int16_t numOfCols = pQueryMsg->numOfCols;
   int16_t numOfOutput = pQueryMsg->numOfOutput;
 
+  SQInfo *pQInfo = (SQInfo *)calloc(1, sizeof(SQInfo));
+  if (pQInfo == NULL) {
+    goto _cleanup_qinfo;
+  }
+  // to make sure third party won't overwrite this structure
+  pQInfo->signature = pQInfo;
+  pQInfo->tableGroupInfo = *pTableGroupInfo;
+
+  SQuery *pQuery = calloc(1, sizeof(SQuery));
+  if (pQuery == NULL) {
+    goto _cleanup_query;
+  }
+  pQInfo->runtimeEnv.pQuery = pQuery;
+
   pQuery->numOfCols       = numOfCols;
   pQuery->numOfOutput     = numOfOutput;
   pQuery->limit.limit     = pQueryMsg->limit;
@@ -5668,6 +5716,7 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
   pQuery->slidingTimeUnit = pQueryMsg->slidingTimeUnit;
   pQuery->fillType        = pQueryMsg->fillType;
   pQuery->numOfTags       = pQueryMsg->numOfTags;
+  pQuery->tagColList      = pTagCols;
   
   // todo do not allocate ??
   pQuery->colList = calloc(numOfCols, sizeof(SSingleColumnFilterInfo));
@@ -5680,8 +5729,6 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
     pQuery->colList[i].filters = tscFilterInfoClone(pQueryMsg->colList[i].filters, pQuery->colList[i].numOfFilters);
   }
 
-  pQuery->tagColList = pTagCols;
-
   // calculate the result row size
   for (int16_t col = 0; col < numOfOutput; ++col) {
     assert(pExprs[col].bytes > 0);
@@ -5726,10 +5773,6 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
     memcpy(pQuery->fillVal, (char *)pQueryMsg->fillVal, pQuery->numOfOutput * sizeof(int64_t));
   }
 
-  // to make sure third party won't overwrite this structure
-  pQInfo->signature = pQInfo;
-
-  pQInfo->tableGroupInfo = *pTableGroupInfo;
   size_t numOfGroups = 0;
   if (pTableGroupInfo->pGroupList != NULL) {
     numOfGroups = taosArrayGetSize(pTableGroupInfo->pGroupList);
@@ -5753,6 +5796,10 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
 
     size_t s = taosArrayGetSize(pa);
     SArray* p1 = taosArrayInit(s, POINTER_BYTES);
+    if (p1 == NULL) {
+      goto _cleanup;
+    }
+    taosArrayPush(pQInfo->tableqinfoGroupInfo.pGroupList, &p1);
 
     for(int32_t j = 0; j < s; ++j) {
       void* pTable = taosArrayGetP(pa, j);
@@ -5767,13 +5814,14 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
 
       void* buf = pQInfo->pBuf + index * sizeof(STableQueryInfo);
       STableQueryInfo* item = createTableQueryInfo(&pQInfo->runtimeEnv, pTable, window, buf);
+      if (item == NULL) {
+        goto _cleanup;
+      }
       item->groupIndex = i;
       taosArrayPush(p1, &item);
       taosHashPut(pQInfo->tableqinfoGroupInfo.map, &id->tid, sizeof(id->tid), &item, POINTER_BYTES);
       index += 1;
     }
-
-    taosArrayPush(pQInfo->tableqinfoGroupInfo.pGroupList, &p1);
   }
 
   pQInfo->arrTableIdInfo = taosArrayInit(tableIndex, sizeof(STableIdInfo));
@@ -5792,6 +5840,21 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
   qDebug("qmsg:%p QInfo:%p created", pQueryMsg, pQInfo);
   return pQInfo;
 
+_cleanup_qinfo:
+  tsdbDestoryTableGroup(pTableGroupInfo);
+
+_cleanup_query:
+  taosArrayDestroy(pGroupbyExpr->columnInfo);
+  tfree(pGroupbyExpr);
+  tfree(pTagCols);
+  for (int32_t i = 0; i < numOfOutput; ++i) {
+    SExprInfo* pExprInfo = &pExprs[i];
+    if (pExprInfo->pExpr != NULL) {
+      tExprTreeDestroy(&pExprInfo->pExpr, NULL);
+    }
+  }
+  tfree(pExprs);
+
 _cleanup:
   freeQInfo(pQInfo);
   return NULL;
@@ -5811,7 +5874,7 @@ static bool isValidQInfo(void *param) {
   return (sig == (uint64_t)pQInfo);
 }
 
-static int32_t initQInfo(SQueryTableMsg *pQueryMsg, void *tsdb, int32_t vgId, SQInfo *pQInfo, bool isSTable, void* param, _qinfo_free_fn_t fn) {
+static int32_t initQInfo(SQueryTableMsg *pQueryMsg, void *tsdb, int32_t vgId, SQInfo *pQInfo, bool isSTable, void* param) {
   int32_t code = TSDB_CODE_SUCCESS;
   SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
 
@@ -5836,7 +5899,6 @@ static int32_t initQInfo(SQueryTableMsg *pQueryMsg, void *tsdb, int32_t vgId, SQ
   }
 
   pQInfo->param = param;
-  pQInfo->freeFn = fn;
 
   if (pQInfo->tableqinfoGroupInfo.numOfTables == 0) {
     qDebug("QInfo:%p no table qualified for tag filter, abort query", pQInfo);
@@ -5911,19 +5973,21 @@ static void freeQInfo(SQInfo *pQInfo) {
   }
 
   // todo refactor, extract method to destroytableDataInfo
-  int32_t numOfGroups = GET_NUM_OF_TABLEGROUP(pQInfo);
-  for (int32_t i = 0; i < numOfGroups; ++i) {
-    SArray *p = GET_TABLEGROUP(pQInfo, i);
+  if (pQInfo->tableqinfoGroupInfo.pGroupList != NULL) {
+    int32_t numOfGroups = GET_NUM_OF_TABLEGROUP(pQInfo);
+    for (int32_t i = 0; i < numOfGroups; ++i) {
+      SArray *p = GET_TABLEGROUP(pQInfo, i);
 
-    size_t num = taosArrayGetSize(p);
-    for(int32_t j = 0; j < num; ++j) {
-      STableQueryInfo* item = taosArrayGetP(p, j);
-      if (item != NULL) {
-        destroyTableQueryInfo(item, pQuery->numOfOutput);
+      size_t num = taosArrayGetSize(p);
+      for(int32_t j = 0; j < num; ++j) {
+        STableQueryInfo* item = taosArrayGetP(p, j);
+        if (item != NULL) {
+          destroyTableQueryInfo(item, pQuery->numOfOutput);
+        }
       }
-    }
 
-    taosArrayDestroy(p);
+      taosArrayDestroy(p);
+    }
   }
 
   tfree(pQInfo->pBuf);
@@ -6038,8 +6102,7 @@ typedef struct SQueryMgmt {
   pthread_mutex_t lock;
 } SQueryMgmt;
 
-int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, void* param, _qinfo_free_fn_t fn,
-    qinfo_t* pQInfo) {
+int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, void* param, qinfo_t* pQInfo) {
   assert(pQueryMsg != NULL && tsdb != NULL);
 
   int32_t code = TSDB_CODE_SUCCESS;
@@ -6105,6 +6168,9 @@ int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, vo
       code = tsdbQuerySTableByTagCond(tsdb, id->uid, tagCond, pQueryMsg->tagCondLen, pQueryMsg->tagNameRelType, tbnameCond, &tableGroupInfo, pGroupColIndex,
                                           numOfGroupByCols);
       if (code != TSDB_CODE_SUCCESS) {
+        if (code == TSDB_CODE_QRY_EXCEED_TAGS_LIMIT) {
+          qError("qmsg:%p failed to QueryStable, reason: %s", pQueryMsg, tstrerror(code));
+        }
         goto _over;
       }
     } else {
@@ -6129,7 +6195,7 @@ int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, vo
     goto _over;
   }
 
-  code = initQInfo(pQueryMsg, tsdb, vgId, *pQInfo, isSTableQuery, param, fn);
+  code = initQInfo(pQueryMsg, tsdb, vgId, *pQInfo, isSTableQuery, param);
 
 _over:
   free(tagCond);
@@ -6152,44 +6218,21 @@ _over:
   //pQInfo already freed in initQInfo, but *pQInfo may not pointer to null;
   if (code != TSDB_CODE_SUCCESS) {
     *pQInfo = NULL;
-  } else {
-    SQInfo* pq = (SQInfo*) (*pQInfo);
-
-    T_REF_INC(pq);
-    T_REF_INC(pq);
   }
 
   // if failed to add ref for all meters in this query, abort current query
   return code;
 }
 
-static void doDestoryQueryInfo(SQInfo* pQInfo) {
-  assert(pQInfo != NULL);
-  qDebug("QInfo:%p query completed", pQInfo);
-  queryCostStatis(pQInfo);   // print the query cost summary
-  freeQInfo(pQInfo);
-}
-
 void qDestroyQueryInfo(qinfo_t qHandle) {
   SQInfo* pQInfo = (SQInfo*) qHandle;
   if (!isValidQInfo(pQInfo)) {
     return;
   }
 
-  int32_t ref = T_REF_DEC(pQInfo);
-  qDebug("QInfo:%p dec refCount, value:%d", pQInfo, ref);
-
-  if (ref == 0) {
-    _qinfo_free_fn_t freeFp = pQInfo->freeFn;
-    void* param = pQInfo->param;
-
-    doDestoryQueryInfo(pQInfo);
-    if (freeFp != NULL) {
-      assert(param != NULL);
-      freeFp(param);
-    }
-
-  }
+  qDebug("QInfo:%p query completed", pQInfo);
+  queryCostStatis(pQInfo);   // print the query cost summary
+  freeQInfo(pQInfo);
 }
 
 void qTableQuery(qinfo_t qinfo) {
@@ -6200,31 +6243,24 @@ void qTableQuery(qinfo_t qinfo) {
     return;
   }
 
-  if (isQueryKilled(pQInfo)) {
+  if (IS_QUERY_KILLED(pQInfo)) {
     qDebug("QInfo:%p it is already killed, abort", pQInfo);
-
     sem_post(&pQInfo->dataReady);
-    qDestroyQueryInfo(pQInfo);
     return;
   }
 
   if (pQInfo->tableqinfoGroupInfo.numOfTables == 0) {
     qDebug("QInfo:%p no table exists for query, abort", pQInfo);
-
     sem_post(&pQInfo->dataReady);
-    qDestroyQueryInfo(pQInfo);
     return;
   }
 
-  int32_t ret = setjmp(pQInfo->runtimeEnv.env);
-
   // error occurs, record the error code and return to client
+  int32_t ret = setjmp(pQInfo->runtimeEnv.env);
   if (ret != TSDB_CODE_SUCCESS) {
     pQInfo->code = ret;
-    qDebug("QInfo:%p query abort due to error occurs, code:%s", pQInfo, tstrerror(pQInfo->code));
+    qDebug("QInfo:%p query abort due to error/cancel occurs, code:%s", pQInfo, tstrerror(pQInfo->code));
     sem_post(&pQInfo->dataReady);
-    qDestroyQueryInfo(pQInfo);
-
     return;
   }
 
@@ -6241,7 +6277,7 @@ void qTableQuery(qinfo_t qinfo) {
   }
 
   SQuery* pQuery = pRuntimeEnv->pQuery;
-  if (isQueryKilled(pQInfo)) {
+  if (IS_QUERY_KILLED(pQInfo)) {
     qDebug("QInfo:%p query is killed", pQInfo);
   } else if (pQuery->rec.rows == 0) {
     qDebug("QInfo:%p over, %zu tables queried, %"PRId64" rows are returned", pQInfo, pQInfo->tableqinfoGroupInfo.numOfTables, pQuery->rec.total);
@@ -6251,7 +6287,6 @@ void qTableQuery(qinfo_t qinfo) {
   }
 
   sem_post(&pQInfo->dataReady);
-  qDestroyQueryInfo(pQInfo);
 }
 
 int32_t qRetrieveQueryResultInfo(qinfo_t qinfo) {
@@ -6262,7 +6297,7 @@ int32_t qRetrieveQueryResultInfo(qinfo_t qinfo) {
   }
 
   SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
-  if (isQueryKilled(pQInfo)) {
+  if (IS_QUERY_KILLED(pQInfo)) {
     qDebug("QInfo:%p query is killed, code:%d", pQInfo, pQInfo->code);
     return pQInfo->code;
   }
@@ -6295,7 +6330,7 @@ bool qHasMoreResultsToRetrieve(qinfo_t qinfo) {
   }
 
   if (ret) {
-    T_REF_INC(pQInfo);
+//    T_REF_INC(pQInfo);
     qDebug("QInfo:%p has more results waits for client retrieve", pQInfo);
   }
 
@@ -6337,7 +6372,7 @@ int32_t qDumpRetrieveResult(qinfo_t qinfo, SRetrieveTableRsp **pRsp, int32_t *co
     code = pQInfo->code;
   }
 
-  if (isQueryKilled(pQInfo) || Q_STATUS_EQUAL(pQuery->status, QUERY_OVER)) {
+  if (IS_QUERY_KILLED(pQInfo) || Q_STATUS_EQUAL(pQuery->status, QUERY_OVER)) {
     (*pRsp)->completed = 1;  // notify no more result to client
   }
 
@@ -6351,8 +6386,8 @@ int32_t qKillQuery(qinfo_t qinfo) {
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
 
+  sem_post(&pQInfo->dataReady);
   setQueryKilled(pQInfo);
-  qDestroyQueryInfo(pQInfo);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -6497,6 +6532,7 @@ void freeqinfoFn(void *qhandle) {
   }
 
   qKillQuery(*handle);
+  qDestroyQueryInfo(*handle);
 }
 
 void* qOpenQueryMgmt(int32_t vgId) {
@@ -6515,7 +6551,12 @@ void* qOpenQueryMgmt(int32_t vgId) {
   return pQueryHandle;
 }
 
-void qSetQueryMgmtClosed(void* pQMgmt) {
+static void queryMgmtKillQueryFn(void* handle) {
+  void** fp = (void**)handle;
+  qKillQuery(*fp);
+}
+
+void qQueryMgmtNotifyClosed(void* pQMgmt) {
   if (pQMgmt == NULL) {
     return;
   }
@@ -6527,7 +6568,7 @@ void qSetQueryMgmtClosed(void* pQMgmt) {
   pQueryMgmt->closed = true;
   pthread_mutex_unlock(&pQueryMgmt->lock);
 
-  taosCacheRefresh(pQueryMgmt->qinfoPool, freeqinfoFn);
+  taosCacheRefresh(pQueryMgmt->qinfoPool, queryMgmtKillQueryFn);
 }
 
 void qCleanupQueryMgmt(void* pQMgmt) {
@@ -6559,13 +6600,14 @@ void** qRegisterQInfo(void* pMgmt, uint64_t qInfo) {
 
   SQueryMgmt *pQueryMgmt = pMgmt;
   if (pQueryMgmt->qinfoPool == NULL) {
+    qError("QInfo:%p failed to add qhandle into qMgmt, since qMgmt is closed", (void *)qInfo);
     return NULL;
   }
 
   pthread_mutex_lock(&pQueryMgmt->lock);
   if (pQueryMgmt->closed) {
     pthread_mutex_unlock(&pQueryMgmt->lock);
-
+    qError("QInfo:%p failed to add qhandle into cache, since qMgmt is colsing", (void *)qInfo);
     return NULL;
   } else {
     uint64_t handleVal = (uint64_t) qInfo;
diff --git a/src/query/src/qUtil.c b/src/query/src/qUtil.c
index dce2c24ea0..acdc46fcc1 100644
--- a/src/query/src/qUtil.c
+++ b/src/query/src/qUtil.c
@@ -50,9 +50,15 @@ int32_t initWindowResInfo(SWindowResInfo *pWindowResInfo, SQueryRuntimeEnv *pRun
   
   // use the pointer arraylist
   pWindowResInfo->pResult = calloc(threshold, sizeof(SWindowResult));
+  if (pWindowResInfo->pResult == NULL) {
+    return TSDB_CODE_QRY_OUT_OF_MEMORY;
+  }
   for (int32_t i = 0; i < pWindowResInfo->capacity; ++i) {
     SPosInfo posInfo = {-1, -1};
-    createQueryResultInfo(pRuntimeEnv->pQuery, &pWindowResInfo->pResult[i], pRuntimeEnv->stableQuery, &posInfo, pRuntimeEnv->interBufSize);
+    int32_t code = createQueryResultInfo(pRuntimeEnv->pQuery, &pWindowResInfo->pResult[i], pRuntimeEnv->stableQuery, &posInfo, pRuntimeEnv->interBufSize);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
+    }
   }
   
   return TSDB_CODE_SUCCESS;
@@ -76,9 +82,11 @@ void cleanupTimeWindowInfo(SWindowResInfo *pWindowResInfo, int32_t numOfCols) {
     return;
   }
   
-  for (int32_t i = 0; i < pWindowResInfo->capacity; ++i) {
-    SWindowResult *pResult = &pWindowResInfo->pResult[i];
-    destroyTimeWindowRes(pResult, numOfCols);
+  if (pWindowResInfo->pResult != NULL) {
+    for (int32_t i = 0; i < pWindowResInfo->capacity; ++i) {
+      SWindowResult *pResult = &pWindowResInfo->pResult[i];
+      destroyTimeWindowRes(pResult, numOfCols);
+    }
   }
   
   taosHashCleanup(pWindowResInfo->hashList);
diff --git a/src/query/src/qast.c b/src/query/src/qast.c
index ffd339f111..c5f4a9ce6c 100644
--- a/src/query/src/qast.c
+++ b/src/query/src/qast.c
@@ -962,10 +962,13 @@ static UNUSED_FUNC char* exception_strdup(const char* str) {
 
 static tExprNode* exprTreeFromBinaryImpl(SBufferReader* br) {
   int32_t anchor = CLEANUP_GET_ANCHOR();
+  if (CLEANUP_EXCEED_LIMIT()) {
+    THROW(TSDB_CODE_QRY_EXCEED_TAGS_LIMIT);
+    return NULL;
+  }
 
   tExprNode* pExpr = exception_calloc(1, sizeof(tExprNode));
   CLEANUP_PUSH_VOID_PTR_PTR(true, tExprNodeDestroy, pExpr, NULL);
-
   pExpr->nodeType = tbufReadUint8(br);
   
   if (pExpr->nodeType == TSQL_NODE_VALUE) {
@@ -995,7 +998,6 @@ static tExprNode* exprTreeFromBinaryImpl(SBufferReader* br) {
     pExpr->_node.hasPK = tbufReadUint8(br);
     pExpr->_node.pLeft = exprTreeFromBinaryImpl(br);
     pExpr->_node.pRight = exprTreeFromBinaryImpl(br);
-    
     assert(pExpr->_node.pLeft != NULL && pExpr->_node.pRight != NULL);
   }
   
diff --git a/src/query/src/qparserImpl.c b/src/query/src/qparserImpl.c
index d4ac540d2f..ecc11f8f4d 100644
--- a/src/query/src/qparserImpl.c
+++ b/src/query/src/qparserImpl.c
@@ -896,6 +896,7 @@ void setDefaultCreateDbOption(SCreateDBInfo *pDBInfo) {
   pDBInfo->compressionLevel = -1;
 
   pDBInfo->walLevel = -1;
+  pDBInfo->fsyncPeriod = -1;
   pDBInfo->commitTime = -1;
   pDBInfo->maxTablesPerVnode = -1;
 
diff --git a/src/query/src/qtokenizer.c b/src/query/src/qtokenizer.c
index 80d59a384e..0ea0ff7bf3 100644
--- a/src/query/src/qtokenizer.c
+++ b/src/query/src/qtokenizer.c
@@ -124,6 +124,7 @@ static SKeyword keywordTable[] = {
     {"CACHE",        TK_CACHE},
     {"CTIME",        TK_CTIME},
     {"WAL",          TK_WAL},
+    {"FSYNC",        TK_FSYNC},
     {"COMP",         TK_COMP},
     {"PRECISION",    TK_PRECISION},
     {"LP",           TK_LP},
@@ -509,10 +510,11 @@ uint32_t tSQLGetToken(char* z, uint32_t* tokenType) {
       for (i = 1; isdigit(z[i]); i++) {
       }
 
-      /* here is the 1a/2s/3m/9y */
-      if ((z[i] == 'a' || z[i] == 's' || z[i] == 'm' || z[i] == 'h' || z[i] == 'd' || z[i] == 'n' || z[i] == 'y' ||
-          z[i] == 'w' || z[i] == 'A' || z[i] == 'S' || z[i] == 'M' || z[i] == 'H' || z[i] == 'D' || z[i] == 'N' ||
-          z[i] == 'Y' || z[i] == 'W') &&
+      /* here is the 1u/1a/2s/3m/9y */
+      if ((z[i] == 'u' || z[i] == 'a' || z[i] == 's' || z[i] == 'm' || z[i] == 'h' || z[i] == 'd' || z[i] == 'n' ||
+           z[i] == 'y' || z[i] == 'w' ||
+           z[i] == 'U' || z[i] == 'A' || z[i] == 'S' || z[i] == 'M' || z[i] == 'H' || z[i] == 'D' || z[i] == 'N' ||
+           z[i] == 'Y' || z[i] == 'W') &&
           (isIdChar[(uint8_t)z[i + 1]] == 0)) {
         *tokenType = TK_VARIABLE;
         i += 1;
diff --git a/src/query/src/qtsbuf.c b/src/query/src/qtsbuf.c
index fedaa315d3..b84fbded38 100644
--- a/src/query/src/qtsbuf.c
+++ b/src/query/src/qtsbuf.c
@@ -79,7 +79,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
     pTSBuf->numOfAlloc = header.numOfVnode;
     STSVnodeBlockInfoEx* tmp = realloc(pTSBuf->pData, sizeof(STSVnodeBlockInfoEx) * pTSBuf->numOfAlloc);
     if (tmp == NULL) {
-      tsBufDestory(pTSBuf);
+      tsBufDestroy(pTSBuf);
       return NULL;
     }
     
@@ -92,7 +92,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
   pTSBuf->tsOrder = header.tsOrder;
   if (pTSBuf->tsOrder != TSDB_ORDER_ASC && pTSBuf->tsOrder != TSDB_ORDER_DESC) {
 //    tscError("invalid order info in buf:%d", pTSBuf->tsOrder);
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL;
   }
   
@@ -100,7 +100,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
   
   STSVnodeBlockInfo* buf = (STSVnodeBlockInfo*)calloc(1, infoSize);
   if (buf == NULL) {
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL; 
   } 
   
@@ -120,7 +120,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
   
   struct stat fileStat;
   if (fstat(fileno(pTSBuf->f), &fileStat) != 0) {
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL;
   }
   
@@ -137,7 +137,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
   return pTSBuf;
 }
 
-void* tsBufDestory(STSBuf* pTSBuf) {
+void* tsBufDestroy(STSBuf* pTSBuf) {
   if (pTSBuf == NULL) {
     return NULL;
   }
@@ -920,13 +920,13 @@ static STSBuf* allocResForTSBuf(STSBuf* pTSBuf) {
   pTSBuf->numOfAlloc = INITIAL_VNODEINFO_SIZE;
   pTSBuf->pData = calloc(pTSBuf->numOfAlloc, sizeof(STSVnodeBlockInfoEx));
   if (pTSBuf->pData == NULL) {
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL;
   }
   
   pTSBuf->tsData.rawBuf = malloc(MEM_BUF_SIZE);
   if (pTSBuf->tsData.rawBuf == NULL) {
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL;
   }
   
@@ -936,13 +936,13 @@ static STSBuf* allocResForTSBuf(STSBuf* pTSBuf) {
   
   pTSBuf->assistBuf = malloc(MEM_BUF_SIZE);
   if (pTSBuf->assistBuf == NULL) {
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL;
   }
   
   pTSBuf->block.payload = malloc(MEM_BUF_SIZE);
   if (pTSBuf->block.payload == NULL) {
-    tsBufDestory(pTSBuf);
+    tsBufDestroy(pTSBuf);
     return NULL;
   }
   
diff --git a/src/query/src/sql.c b/src/query/src/sql.c
index eafb052593..ac9952bb97 100644
--- a/src/query/src/sql.c
+++ b/src/query/src/sql.c
@@ -25,11 +25,11 @@
 #include <stdio.h>
 /************ Begin %include sections from the grammar ************************/
 
-#include <assert.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <assert.h>
+#include <stdbool.h>
 #include "qsqlparser.h"
 #include "tcmdtype.h"
 #include "tstoken.h"
@@ -97,26 +97,26 @@
 #endif
 /************* Begin control #defines *****************************************/
 #define YYCODETYPE unsigned short int
-#define YYNOCODE 270
+#define YYNOCODE 272
 #define YYACTIONTYPE unsigned short int
 #define ParseTOKENTYPE SSQLToken
 typedef union {
   int yyinit;
   ParseTOKENTYPE yy0;
-  int yy150;
-  SQuerySQL* yy190;
-  SCreateAcctSQL yy219;
-  tSQLExprList* yy260;
-  SSubclauseInfo* yy263;
-  int64_t yy279;
-  SLimitVal yy284;
-  tVariantList* yy322;
-  TAOS_FIELD yy325;
-  tFieldList* yy369;
-  SCreateDBInfo yy374;
-  SCreateTableSQL* yy408;
-  tSQLExpr* yy500;
-  tVariant yy518;
+  SSubclauseInfo* yy25;
+  tSQLExpr* yy66;
+  SCreateAcctSQL yy73;
+  int yy82;
+  SQuerySQL* yy150;
+  SCreateDBInfo yy158;
+  TAOS_FIELD yy181;
+  SLimitVal yy188;
+  tSQLExprList* yy224;
+  int64_t yy271;
+  tVariant yy312;
+  SCreateTableSQL* yy374;
+  tFieldList* yy449;
+  tVariantList* yy494;
 } YYMINORTYPE;
 #ifndef YYSTACKDEPTH
 #define YYSTACKDEPTH 100
@@ -126,17 +126,17 @@ typedef union {
 #define ParseARG_FETCH SSqlInfo* pInfo = yypParser->pInfo
 #define ParseARG_STORE yypParser->pInfo = pInfo
 #define YYFALLBACK 1
-#define YYNSTATE             241
-#define YYNRULE              220
-#define YYNTOKEN             205
-#define YY_MAX_SHIFT         240
-#define YY_MIN_SHIFTREDUCE   397
-#define YY_MAX_SHIFTREDUCE   616
-#define YY_ERROR_ACTION      617
-#define YY_ACCEPT_ACTION     618
-#define YY_NO_ACTION         619
-#define YY_MIN_REDUCE        620
-#define YY_MAX_REDUCE        839
+#define YYNSTATE             242
+#define YYNRULE              223
+#define YYNTOKEN             206
+#define YY_MAX_SHIFT         241
+#define YY_MIN_SHIFTREDUCE   401
+#define YY_MAX_SHIFTREDUCE   623
+#define YY_ERROR_ACTION      624
+#define YY_ACCEPT_ACTION     625
+#define YY_NO_ACTION         626
+#define YY_MIN_REDUCE        627
+#define YY_MAX_REDUCE        849
 /************* End control #defines *******************************************/
 
 /* Define the yytestcase() macro to be a no-op if is not already defined
@@ -202,216 +202,217 @@ typedef union {
 **  yy_default[]       Default action for each state.
 **
 *********** Begin parsing tables **********************************************/
-#define YY_ACTTAB_COUNT (541)
+#define YY_ACTTAB_COUNT (547)
 static const YYACTIONTYPE yy_action[] = {
- /*     0 */   718,  438,  717,   11,  716,  134,  618,  240,  719,  439,
- /*    10 */   721,  720,  758,   41,   43,   21,   35,   36,  153,  238,
- /*    20 */   135,   29,  135,  438,  197,   39,   37,   40,   38,  158,
- /*    30 */   827,  439,  826,   34,   33,  139,  135,   32,   31,   30,
- /*    40 */    41,   43,  747,   35,   36,  157,  827,  166,   29,  733,
- /*    50 */   103,  197,   39,   37,   40,   38,  182,   21,  103,   99,
- /*    60 */    34,   33,  755,  155,   32,   31,   30,  398,  399,  400,
- /*    70 */   401,  402,  403,  404,  405,  406,  407,  408,  409,  239,
- /*    80 */   438,  736,   41,   43,  103,   35,   36,  103,  439,  168,
- /*    90 */    29,  732,   21,  197,   39,   37,   40,   38,   32,   31,
- /*   100 */    30,   56,   34,   33,  747,  781,   32,   31,   30,   43,
- /*   110 */   185,   35,   36,  782,  823,  192,   29,   21,  154,  197,
- /*   120 */    39,   37,   40,   38,  167,  572,  733,    8,   34,   33,
- /*   130 */    61,  113,   32,   31,   30,  659,   35,   36,  126,   59,
- /*   140 */   194,   29,   58,   17,  197,   39,   37,   40,   38,  215,
- /*   150 */    26,  733,  169,   34,   33,  214,  213,   32,   31,   30,
- /*   160 */    16,  233,  208,  232,  207,  206,  205,  231,  204,  230,
- /*   170 */   229,  203,  714,  219,  703,  704,  705,  706,  707,  708,
- /*   180 */   709,  710,  711,  712,  713,  162,  585,   50,   60,  576,
- /*   190 */   175,  579,  165,  582,  234,  162,  585,  179,  178,  576,
- /*   200 */    27,  579,  734,  582,   51,  162,  585,   12,   98,  576,
- /*   210 */   736,  579,  736,  582,  228,   26,   21,  159,  160,   34,
- /*   220 */    33,  196,  836,   32,   31,   30,  148,  159,  160,   76,
- /*   230 */   822,  533,   88,   87,  142,  228,  668,  159,  160,  126,
- /*   240 */   147,  553,  554,   39,   37,   40,   38,  821,  220,  544,
- /*   250 */   733,   34,   33,   46,  501,   32,   31,   30,  517,  525,
- /*   260 */    17,  514,  151,  515,  152,  516,  184,   26,   16,  233,
- /*   270 */   140,  232,  237,  236,   95,  231,  660,  230,  229,  126,
- /*   280 */   530,   42,  217,  216,  578,   18,  581,  181,  161,  170,
- /*   290 */   171,   42,  584,  577,  150,  580,   74,   78,   83,   86,
- /*   300 */    77,   42,  584,  574,  545,  602,   80,  583,   14,   13,
- /*   310 */   141,  586,  584,  143,  507,   13,   47,  583,   46,   73,
- /*   320 */    72,  116,  117,   68,   64,   67,    3,  583,  130,  128,
- /*   330 */    91,   90,   89,  506,  201,   48,  144,   22,   22,  575,
- /*   340 */   521,  519,  522,  520,   10,    9,   85,   84,  145,  146,
- /*   350 */   137,  133,  138,  735,  136,  792,  791,  163,  788,  518,
- /*   360 */   787,  164,  757,  727,  218,  100,  749,  774,  773,  114,
- /*   370 */    26,  115,  112,  670,  202,  131,   24,  211,  667,  212,
- /*   380 */   835,   70,  834,  832,  118,  688,   25,  183,   23,  132,
- /*   390 */   657,   79,   93,  540,  655,  186,   81,   82,  653,  652,
- /*   400 */   172,  190,  127,  746,  650,  649,  648,  647,  646,  638,
- /*   410 */   129,  644,  642,   52,  640,   44,   49,  195,  761,  762,
- /*   420 */   775,  191,  193,  189,  187,   28,  210,   75,  221,  222,
- /*   430 */   223,  224,  225,  199,  226,  227,  235,   53,  616,  174,
- /*   440 */   615,  149,   62,  173,   65,  176,  177,  614,  180,  651,
- /*   450 */   607,  184,   92,  527,  645,  541,  120,  689,  121,  122,
- /*   460 */   119,  123,  125,  124,   94,  104,    1,  731,  105,  111,
- /*   470 */   108,  106,  107,  109,  110,    2,   55,   57,  101,  156,
- /*   480 */   188,    5,  546,  102,   19,    6,  587,   20,    4,   15,
- /*   490 */    63,    7,  198,  478,  200,  475,  473,  472,  471,  469,
- /*   500 */   442,  209,   66,   45,   69,   71,   22,  503,  502,  500,
- /*   510 */    54,  463,  461,  453,  459,  455,  457,  451,  449,  477,
- /*   520 */   476,  474,  470,  468,   46,  440,   96,  413,  411,  620,
- /*   530 */   619,  619,  619,  619,  619,  619,  619,  619,  619,  619,
- /*   540 */    97,
+ /*     0 */   727,  442,  726,   11,  725,  625,  241,  508,  728,  443,
+ /*    10 */   730,  731,  729,   41,   43,  524,   35,   36,  521,  134,
+ /*    20 */   522,   29,  523,  442,  197,   39,   37,   40,   38,  153,
+ /*    30 */   239,  443,  219,   34,   33,  217,  216,   32,   31,   30,
+ /*    40 */    41,   43,  757,   35,   36,  139,  170,  171,   29,  135,
+ /*    50 */    21,  197,   39,   37,   40,   38,  182,  833,  158,  837,
+ /*    60 */    34,   33,  744,  768,   32,   31,   30,  402,  403,  404,
+ /*    70 */   405,  406,  407,  408,  409,  410,  411,  412,  413,  240,
+ /*    80 */    41,   43,  846,   35,   36,  742,   60,  135,   29,  135,
+ /*    90 */    21,  197,   39,   37,   40,   38,  157,  837,   27,  836,
+ /*   100 */    34,   33,   56,  228,   32,   31,   30,  103,   43,    8,
+ /*   110 */    35,   36,   61,  113,  765,   29,  757,  525,  197,   39,
+ /*   120 */    37,   40,   38,  166,  537,  743,  579,   34,   33,   18,
+ /*   130 */   154,   32,   31,   30,   16,  234,  208,  233,  207,  206,
+ /*   140 */   205,  232,  204,  231,  230,  229,  203,  723,  168,  711,
+ /*   150 */   712,  713,  714,  715,  716,  717,  718,  719,  720,  721,
+ /*   160 */   722,   35,   36,  792,  103,  192,   29,  175,  155,  197,
+ /*   170 */    39,   37,   40,   38,  179,  178,   21,  581,   34,   33,
+ /*   180 */   442,   12,   32,   31,   30,  162,  592,  746,  443,  583,
+ /*   190 */    17,  586,   76,  589,  103,  162,  592,   26,  228,  583,
+ /*   200 */   148,  586,   99,  589,  103,   21,   88,   87,  142,  167,
+ /*   210 */   165,  743,  169,  582,  147,  214,  213,  159,  160,   50,
+ /*   220 */   791,  196,   74,   78,   83,   86,   77,  159,  160,  746,
+ /*   230 */   235,  540,   80,  162,  592,   17,   51,  583,  215,  586,
+ /*   240 */   743,  589,   26,   39,   37,   40,   38,  832,  194,  746,
+ /*   250 */    58,   34,   33,   47,  185,   32,   31,   30,  666,  831,
+ /*   260 */    59,  126,  181,  560,  561,  159,  160,   16,  234,  150,
+ /*   270 */   233,   21,   48,  585,  232,  588,  231,  230,  229,   34,
+ /*   280 */    33,  745,   42,   32,   31,   30,  116,  117,   68,   64,
+ /*   290 */    67,  151,   42,  591,   32,   31,   30,  130,  128,   91,
+ /*   300 */    90,   89,  675,  591,  220,  126,  743,   98,  590,  238,
+ /*   310 */   237,   95,  667,  152,   26,  126,  532,  584,  590,  587,
+ /*   320 */   551,  161,  552,  184,   46,  609,   14,  593,  514,   13,
+ /*   330 */    42,   13,   46,  513,  201,   73,   72,   22,   22,   10,
+ /*   340 */     9,  591,  528,  526,  529,  527,   85,   84,  802,  140,
+ /*   350 */   141,  143,  801,  144,  163,  145,  590,  146,  798,  137,
+ /*   360 */     3,  133,  138,  136,  797,  164,  759,  737,  218,  767,
+ /*   370 */   100,  784,  783,  114,  112,  115,  677,  202,  131,   24,
+ /*   380 */   211,  674,  212,  845,   70,  844,   26,  842,  118,   93,
+ /*   390 */   695,   25,  547,   23,  186,  132,  664,   79,  662,   81,
+ /*   400 */    82,  660,  659,  172,  190,  127,  657,  656,  655,  654,
+ /*   410 */   653,  645,  129,  651,  649,  647,   52,   49,  756,  771,
+ /*   420 */   104,  772,   44,  785,  195,  193,  191,  189,  187,   28,
+ /*   430 */   210,   75,  221,  222,  223,  224,  225,  226,  199,  227,
+ /*   440 */   236,   53,  623,  174,  173,  622,   62,  177,  149,  621,
+ /*   450 */   183,   65,  176,  614,  658,  180,   92,   94,  652,  121,
+ /*   460 */   125,  534,  120,  696,  741,  119,  110,  107,  105,  106,
+ /*   470 */   122,  108,  123,    2,  111,  109,  124,    1,  184,   57,
+ /*   480 */    55,  548,  156,  101,  188,    5,  553,  102,    6,   63,
+ /*   490 */   594,   19,    4,   20,   15,  198,    7,  200,  483,  479,
+ /*   500 */   477,  476,  475,  473,  446,  209,   66,   45,   69,   71,
+ /*   510 */    22,  510,  509,  507,   54,  467,  465,  457,  463,  459,
+ /*   520 */   461,  455,  453,  482,  481,  480,  478,  474,  472,   46,
+ /*   530 */   444,  417,  415,  627,  626,  626,  626,  626,  626,  626,
+ /*   540 */   626,  626,  626,  626,  626,   96,   97,
 };
 static const YYCODETYPE yy_lookahead[] = {
- /*     0 */   225,    1,  227,  258,  229,  258,  206,  207,  233,    9,
- /*    10 */   235,  236,  209,   13,   14,  209,   16,   17,  208,  209,
- /*    20 */   258,   21,  258,    1,   24,   25,   26,   27,   28,  267,
- /*    30 */   268,    9,  268,   33,   34,  258,  258,   37,   38,   39,
- /*    40 */    13,   14,  242,   16,   17,  267,  268,  241,   21,  243,
- /*    50 */   209,   24,   25,   26,   27,   28,  256,  209,  209,  209,
- /*    60 */    33,   34,  259,  226,   37,   38,   39,   45,   46,   47,
+ /*     0 */   226,    1,  228,  260,  230,  207,  208,    5,  234,    9,
+ /*    10 */   236,  237,  238,   13,   14,    2,   16,   17,    5,  260,
+ /*    20 */     7,   21,    9,    1,   24,   25,   26,   27,   28,  209,
+ /*    30 */   210,    9,  210,   33,   34,   33,   34,   37,   38,   39,
+ /*    40 */    13,   14,  244,   16,   17,  260,   33,   34,   21,  260,
+ /*    50 */   210,   24,   25,   26,   27,   28,  258,  260,  269,  270,
+ /*    60 */    33,   34,  240,  210,   37,   38,   39,   45,   46,   47,
  /*    70 */    48,   49,   50,   51,   52,   53,   54,   55,   56,   57,
- /*    80 */     1,  244,   13,   14,  209,   16,   17,  209,    9,   63,
- /*    90 */    21,  243,  209,   24,   25,   26,   27,   28,   37,   38,
- /*   100 */    39,  101,   33,   34,  242,  264,   37,   38,   39,   14,
- /*   110 */   260,   16,   17,  264,  258,  266,   21,  209,  256,   24,
- /*   120 */    25,   26,   27,   28,  241,   98,  243,   97,   33,   34,
- /*   130 */   100,  101,   37,   38,   39,  213,   16,   17,  216,  264,
- /*   140 */   262,   21,  264,   97,   24,   25,   26,   27,   28,  241,
- /*   150 */   104,  243,  126,   33,   34,  129,  130,   37,   38,   39,
- /*   160 */    85,   86,   87,   88,   89,   90,   91,   92,   93,   94,
- /*   170 */    95,   96,  225,  209,  227,  228,  229,  230,  231,  232,
- /*   180 */   233,  234,  235,  236,  237,    1,    2,  102,  245,    5,
- /*   190 */   125,    7,  226,    9,  226,    1,    2,  132,  133,    5,
- /*   200 */   257,    7,  238,    9,  119,    1,    2,   44,   97,    5,
- /*   210 */   244,    7,  244,    9,   78,  104,  209,   33,   34,   33,
- /*   220 */    34,   37,  244,   37,   38,   39,   63,   33,   34,   72,
- /*   230 */   258,   37,   69,   70,   71,   78,  213,   33,   34,  216,
- /*   240 */    77,  114,  115,   25,   26,   27,   28,  258,  241,   98,
- /*   250 */   243,   33,   34,  102,    5,   37,   38,   39,    2,   98,
- /*   260 */    97,    5,  258,    7,  258,    9,  105,  104,   85,   86,
- /*   270 */   258,   88,   60,   61,   62,   92,  213,   94,   95,  216,
- /*   280 */   102,   97,   33,   34,    5,  107,    7,  124,   59,   33,
- /*   290 */    34,   97,  108,    5,  131,    7,   64,   65,   66,   67,
- /*   300 */    68,   97,  108,    1,   98,   98,   74,  123,  102,  102,
- /*   310 */   258,   98,  108,  258,   98,  102,  102,  123,  102,  127,
- /*   320 */   128,   64,   65,   66,   67,   68,   97,  123,   64,   65,
- /*   330 */    66,   67,   68,   98,   98,  121,  258,  102,  102,   37,
- /*   340 */     5,    5,    7,    7,  127,  128,   72,   73,  258,  258,
- /*   350 */   258,  258,  258,  244,  258,  239,  239,  239,  239,  103,
- /*   360 */   239,  239,  209,  240,  239,  209,  242,  265,  265,  209,
- /*   370 */   104,  209,  246,  209,  209,  209,  209,  209,  209,  209,
- /*   380 */   209,  209,  209,  209,  209,  209,  209,  242,  209,  209,
- /*   390 */   209,  209,   59,  108,  209,  261,  209,  209,  209,  209,
- /*   400 */   209,  261,  209,  255,  209,  209,  209,  209,  209,  209,
- /*   410 */   209,  209,  209,  118,  209,  117,  120,  112,  210,  210,
- /*   420 */   210,  111,  116,  110,  109,  122,   75,   84,   83,   49,
- /*   430 */    80,   82,   53,  210,   81,   79,   75,  210,    5,    5,
- /*   440 */     5,  210,  214,  134,  214,  134,    5,    5,  125,  210,
- /*   450 */    87,  105,  211,   98,  210,   98,  222,  224,  218,  221,
- /*   460 */   223,  219,  217,  220,  211,  254,  215,  242,  253,  247,
- /*   470 */   250,  252,  251,  249,  248,  212,  106,  102,   97,    1,
- /*   480 */    97,  113,   98,   97,  102,  113,   98,  102,   97,   97,
- /*   490 */    72,   97,   99,    9,   99,    5,    5,    5,    5,    5,
- /*   500 */    76,   15,   72,   16,  128,  128,  102,    5,    5,   98,
- /*   510 */    97,    5,    5,    5,    5,    5,    5,    5,    5,    5,
- /*   520 */     5,    5,    5,    5,  102,   76,   21,   59,   58,    0,
- /*   530 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   540 */    21,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   550 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   560 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   570 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   580 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   590 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   600 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   610 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   620 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   630 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   640 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   650 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   660 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   670 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   680 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   690 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   700 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   710 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   720 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   730 */   269,  269,  269,  269,  269,  269,  269,  269,  269,  269,
- /*   740 */   269,  269,  269,  269,  269,  269,
+ /*    80 */    13,   14,  246,   16,   17,  245,  247,  260,   21,  260,
+ /*    90 */   210,   24,   25,   26,   27,   28,  269,  270,  259,  270,
+ /*   100 */    33,   34,  102,   78,   37,   38,   39,  210,   14,   98,
+ /*   110 */    16,   17,  101,  102,  261,   21,  244,  104,   24,   25,
+ /*   120 */    26,   27,   28,  243,  103,  245,   99,   33,   34,  108,
+ /*   130 */   258,   37,   38,   39,   85,   86,   87,   88,   89,   90,
+ /*   140 */    91,   92,   93,   94,   95,   96,   97,  226,   63,  228,
+ /*   150 */   229,  230,  231,  232,  233,  234,  235,  236,  237,  238,
+ /*   160 */   239,   16,   17,  266,  210,  268,   21,  126,  227,   24,
+ /*   170 */    25,   26,   27,   28,  133,  134,  210,    1,   33,   34,
+ /*   180 */     1,   44,   37,   38,   39,    1,    2,  246,    9,    5,
+ /*   190 */    98,    7,   72,    9,  210,    1,    2,  105,   78,    5,
+ /*   200 */    63,    7,  210,    9,  210,  210,   69,   70,   71,  243,
+ /*   210 */   227,  245,  127,   37,   77,  130,  131,   33,   34,  103,
+ /*   220 */   266,   37,   64,   65,   66,   67,   68,   33,   34,  246,
+ /*   230 */   227,   37,   74,    1,    2,   98,  120,    5,  243,    7,
+ /*   240 */   245,    9,  105,   25,   26,   27,   28,  260,  264,  246,
+ /*   250 */   266,   33,   34,  103,  262,   37,   38,   39,  214,  260,
+ /*   260 */   266,  217,  125,  115,  116,   33,   34,   85,   86,  132,
+ /*   270 */    88,  210,  122,    5,   92,    7,   94,   95,   96,   33,
+ /*   280 */    34,  246,   98,   37,   38,   39,   64,   65,   66,   67,
+ /*   290 */    68,  260,   98,  109,   37,   38,   39,   64,   65,   66,
+ /*   300 */    67,   68,  214,  109,  243,  217,  245,   98,  124,   60,
+ /*   310 */    61,   62,  214,  260,  105,  217,   99,    5,  124,    7,
+ /*   320 */    99,   59,   99,  106,  103,   99,  103,   99,   99,  103,
+ /*   330 */    98,  103,  103,   99,   99,  128,  129,  103,  103,  128,
+ /*   340 */   129,  109,    5,    5,    7,    7,   72,   73,  241,  260,
+ /*   350 */   260,  260,  241,  260,  241,  260,  124,  260,  241,  260,
+ /*   360 */    98,  260,  260,  260,  241,  241,  244,  242,  241,  210,
+ /*   370 */   210,  267,  267,  210,  248,  210,  210,  210,  210,  210,
+ /*   380 */   210,  210,  210,  210,  210,  210,  105,  210,  210,   59,
+ /*   390 */   210,  210,  109,  210,  263,  210,  210,  210,  210,  210,
+ /*   400 */   210,  210,  210,  210,  263,  210,  210,  210,  210,  210,
+ /*   410 */   210,  210,  210,  210,  210,  210,  119,  121,  257,  211,
+ /*   420 */   256,  211,  118,  211,  113,  117,  112,  111,  110,  123,
+ /*   430 */    75,   84,   83,   49,   80,   82,   53,   81,  211,   79,
+ /*   440 */    75,  211,    5,    5,  135,    5,  215,    5,  211,    5,
+ /*   450 */   244,  215,  135,   87,  211,  126,  212,  212,  211,  219,
+ /*   460 */   218,   99,  223,  225,  244,  224,  250,  253,  255,  254,
+ /*   470 */   222,  252,  220,  213,  249,  251,  221,  216,  106,  103,
+ /*   480 */   107,   99,    1,   98,   98,  114,   99,   98,  114,   72,
+ /*   490 */    99,  103,   98,  103,   98,  100,   98,  100,    9,    5,
+ /*   500 */     5,    5,    5,    5,   76,   15,   72,   16,  129,  129,
+ /*   510 */   103,    5,    5,   99,   98,    5,    5,    5,    5,    5,
+ /*   520 */     5,    5,    5,    5,    5,    5,    5,    5,    5,  103,
+ /*   530 */    76,   59,   58,    0,  271,  271,  271,  271,  271,  271,
+ /*   540 */   271,  271,  271,  271,  271,   21,   21,  271,  271,  271,
+ /*   550 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   560 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   570 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   580 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   590 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   600 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   610 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   620 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   630 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   640 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   650 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   660 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   670 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   680 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   690 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   700 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   710 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   720 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   730 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   740 */   271,  271,  271,  271,  271,  271,  271,  271,  271,  271,
+ /*   750 */   271,  271,  271,
 };
-#define YY_SHIFT_COUNT    (240)
+#define YY_SHIFT_COUNT    (241)
 #define YY_SHIFT_MIN      (0)
-#define YY_SHIFT_MAX      (529)
+#define YY_SHIFT_MAX      (533)
 static const unsigned short int yy_shift_ofst[] = {
- /*     0 */   163,   75,  183,  184,  204,   79,   79,   79,   79,   79,
- /*    10 */    79,    0,   22,  204,  256,  256,  256,   46,   79,   79,
- /*    20 */    79,   79,   79,  157,  136,  136,  541,  194,  204,  204,
- /*    30 */   204,  204,  204,  204,  204,  204,  204,  204,  204,  204,
- /*    40 */   204,  204,  204,  204,  204,  256,  256,  249,  249,  249,
- /*    50 */   249,  249,  249,   30,  249,  111,   79,   79,  127,  127,
- /*    60 */   178,   79,   79,   79,   79,   79,   79,   79,   79,   79,
- /*    70 */    79,   79,   79,   79,   79,   79,   79,   79,   79,   79,
- /*    80 */    79,   79,   79,   79,   79,   79,   79,   79,   79,   79,
- /*    90 */    79,   79,   79,   79,   79,   79,   79,   79,  266,  333,
- /*   100 */   333,  285,  285,  333,  295,  296,  298,  305,  306,  310,
- /*   110 */   313,  315,  303,  266,  333,  333,  351,  351,  333,  343,
- /*   120 */   345,  380,  350,  349,  379,  353,  356,  333,  361,  333,
- /*   130 */   361,  541,  541,   27,   69,   69,   69,   95,  120,  218,
- /*   140 */   218,  218,  232,  186,  186,  186,  186,  257,  264,   26,
- /*   150 */    65,   61,   61,  212,  161,  151,  206,  207,  213,  279,
- /*   160 */   288,  302,  229,  214,   85,  216,  235,  236,  192,  217,
- /*   170 */   335,  336,  274,  433,  309,  434,  435,  311,  441,  442,
- /*   180 */   363,  323,  346,  355,  370,  375,  357,  381,  478,  383,
- /*   190 */   384,  386,  382,  368,  385,  372,  388,  391,  392,  393,
- /*   200 */   394,  395,  418,  484,  490,  491,  492,  493,  494,  424,
- /*   210 */   486,  430,  487,  376,  377,  404,  502,  503,  411,  413,
- /*   220 */   404,  506,  507,  508,  509,  510,  511,  512,  513,  514,
- /*   230 */   515,  516,  517,  518,  422,  449,  505,  519,  468,  470,
- /*   240 */   529,
+ /*     0 */   137,   49,  182,  184,  232,  179,  179,  179,  179,  179,
+ /*    10 */   179,    0,   22,  232,   13,   13,   13,   92,  179,  179,
+ /*    20 */   179,  179,  179,  120,   25,   25,  547,  194,  232,  232,
+ /*    30 */   232,  232,  232,  232,  232,  232,  232,  232,  232,  232,
+ /*    40 */   232,  232,  232,  232,  232,   13,   13,    2,    2,    2,
+ /*    50 */     2,    2,    2,   11,    2,  209,  179,  179,  148,  148,
+ /*    60 */    21,  179,  179,  179,  179,  179,  179,  179,  179,  179,
+ /*    70 */   179,  179,  179,  179,  179,  179,  179,  179,  179,  179,
+ /*    80 */   179,  179,  179,  179,  179,  179,  179,  179,  179,  179,
+ /*    90 */   179,  179,  179,  179,  179,  179,  179,  179,  281,  330,
+ /*   100 */   330,  283,  283,  330,  297,  296,  304,  311,  308,  314,
+ /*   110 */   316,  318,  306,  281,  330,  330,  355,  355,  330,  347,
+ /*   120 */   349,  384,  354,  353,  383,  356,  360,  330,  365,  330,
+ /*   130 */   365,  547,  547,   27,   67,   67,   67,   94,  145,  218,
+ /*   140 */   218,  218,  158,  246,  246,  246,  246,  222,  233,   85,
+ /*   150 */    41,  257,  257,  249,  217,  221,  223,  226,  228,  268,
+ /*   160 */   312,  176,  262,  150,  116,  229,  234,  235,  207,  211,
+ /*   170 */   337,  338,  274,  437,  309,  438,  440,  317,  442,  444,
+ /*   180 */   366,  329,  372,  362,  373,  376,  382,  385,  481,  386,
+ /*   190 */   387,  389,  388,  371,  390,  374,  391,  394,  396,  395,
+ /*   200 */   398,  397,  417,  489,  494,  495,  496,  497,  498,  428,
+ /*   210 */   490,  434,  491,  379,  380,  407,  506,  507,  414,  416,
+ /*   220 */   407,  510,  511,  512,  513,  514,  515,  516,  517,  518,
+ /*   230 */   519,  520,  521,  522,  523,  426,  454,  524,  525,  472,
+ /*   240 */   474,  533,
 };
 #define YY_REDUCE_COUNT (132)
-#define YY_REDUCE_MIN   (-255)
-#define YY_REDUCE_MAX   (263)
+#define YY_REDUCE_MIN   (-257)
+#define YY_REDUCE_MAX   (261)
 static const short yy_reduce_ofst[] = {
- /*     0 */  -200,  -53, -225, -238, -222, -151, -122, -194, -117,  -92,
- /*    10 */     7, -197, -190, -236, -163,  -34,  -32, -138, -150, -159,
- /*    20 */  -125,  -36, -152,  -78,   23,   63,  -57, -255, -253, -223,
- /*    30 */  -144,  -28,  -11,    4,    6,   12,   52,   55,   78,   90,
- /*    40 */    91,   92,   93,   94,   96,  -22,  109,  116,  117,  118,
- /*    50 */   119,  121,  122,  123,  125,  124,  153,  156,  102,  103,
- /*    60 */   126,  160,  162,  164,  165,  166,  167,  168,  169,  170,
- /*    70 */   171,  172,  173,  174,  175,  176,  177,  179,  180,  181,
- /*    80 */   182,  185,  187,  188,  189,  190,  191,  193,  195,  196,
- /*    90 */   197,  198,  199,  200,  201,  202,  203,  205,  145,  208,
- /*   100 */   209,  134,  140,  210,  148,  211,  215,  219,  221,  220,
- /*   110 */   224,  226,  222,  225,  223,  227,  228,  230,  231,  233,
- /*   120 */   237,  234,  240,  238,  242,  243,  245,  239,  241,  244,
- /*   130 */   253,  251,  263,
+ /*     0 */  -202,  -79, -226, -211, -173, -103,  -16, -120,  -34,   -5,
+ /*    10 */    61, -147, -180, -171,  -59,  -17,    3, -128,   -8,  -46,
+ /*    20 */    -6, -178, -160,   44,   88,   98, -161, -257, -241, -215,
+ /*    30 */  -203,  -13,   -1,   31,   53,   89,   90,   91,   93,   95,
+ /*    40 */    97,   99,  101,  102,  103, -164,   35,  107,  111,  113,
+ /*    50 */   117,  123,  124,  125,  127,  122,  159,  160,  104,  105,
+ /*    60 */   126,  163,  165,  166,  167,  168,  169,  170,  171,  172,
+ /*    70 */   173,  174,  175,  177,  178,  180,  181,  183,  185,  186,
+ /*    80 */   187,  188,  189,  190,  191,  192,  193,  195,  196,  197,
+ /*    90 */   198,  199,  200,  201,  202,  203,  204,  205,  206,  208,
+ /*   100 */   210,  131,  141,  212,  161,  164,  213,  215,  214,  219,
+ /*   110 */   224,  216,  225,  220,  227,  230,  231,  236,  237,  238,
+ /*   120 */   241,  239,  240,  248,  252,  255,  242,  243,  244,  247,
+ /*   130 */   245,  261,  260,
 };
 static const YYACTIONTYPE yy_default[] = {
- /*     0 */   617,  669,  658,  829,  829,  617,  617,  617,  617,  617,
- /*    10 */   617,  759,  635,  829,  617,  617,  617,  617,  617,  617,
- /*    20 */   617,  617,  617,  671,  671,  671,  754,  617,  617,  617,
- /*    30 */   617,  617,  617,  617,  617,  617,  617,  617,  617,  617,
- /*    40 */   617,  617,  617,  617,  617,  617,  617,  617,  617,  617,
- /*    50 */   617,  617,  617,  617,  617,  617,  617,  617,  778,  778,
- /*    60 */   752,  617,  617,  617,  617,  617,  617,  617,  617,  617,
- /*    70 */   617,  617,  617,  617,  617,  617,  617,  617,  617,  656,
- /*    80 */   617,  654,  617,  617,  617,  617,  617,  617,  617,  617,
- /*    90 */   617,  617,  617,  617,  617,  643,  617,  617,  617,  637,
- /*   100 */   637,  617,  617,  637,  785,  789,  783,  771,  779,  770,
- /*   110 */   766,  765,  793,  617,  637,  637,  666,  666,  637,  687,
- /*   120 */   685,  683,  675,  681,  677,  679,  673,  637,  664,  637,
- /*   130 */   664,  702,  715,  617,  794,  828,  784,  812,  811,  824,
- /*   140 */   818,  817,  617,  816,  815,  814,  813,  617,  617,  617,
- /*   150 */   617,  820,  819,  617,  617,  617,  617,  617,  617,  617,
- /*   160 */   617,  617,  796,  790,  786,  617,  617,  617,  617,  617,
- /*   170 */   617,  617,  617,  617,  617,  617,  617,  617,  617,  617,
- /*   180 */   617,  617,  751,  617,  617,  760,  617,  617,  617,  617,
- /*   190 */   617,  617,  780,  617,  772,  617,  617,  617,  617,  617,
- /*   200 */   617,  728,  617,  617,  617,  617,  617,  617,  617,  617,
- /*   210 */   617,  617,  617,  617,  617,  833,  617,  617,  617,  722,
- /*   220 */   831,  617,  617,  617,  617,  617,  617,  617,  617,  617,
- /*   230 */   617,  617,  617,  617,  690,  617,  641,  639,  617,  633,
- /*   240 */   617,
+ /*     0 */   624,  676,  665,  839,  839,  624,  624,  624,  624,  624,
+ /*    10 */   624,  769,  642,  839,  624,  624,  624,  624,  624,  624,
+ /*    20 */   624,  624,  624,  678,  678,  678,  764,  624,  624,  624,
+ /*    30 */   624,  624,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*    40 */   624,  624,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*    50 */   624,  624,  624,  624,  624,  624,  624,  624,  788,  788,
+ /*    60 */   762,  624,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*    70 */   624,  624,  624,  624,  624,  624,  624,  624,  624,  663,
+ /*    80 */   624,  661,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*    90 */   624,  624,  624,  624,  624,  650,  624,  624,  624,  644,
+ /*   100 */   644,  624,  624,  644,  795,  799,  793,  781,  789,  780,
+ /*   110 */   776,  775,  803,  624,  644,  644,  673,  673,  644,  694,
+ /*   120 */   692,  690,  682,  688,  684,  686,  680,  644,  671,  644,
+ /*   130 */   671,  710,  724,  624,  804,  838,  794,  822,  821,  834,
+ /*   140 */   828,  827,  624,  826,  825,  824,  823,  624,  624,  624,
+ /*   150 */   624,  830,  829,  624,  624,  624,  624,  624,  624,  624,
+ /*   160 */   624,  624,  806,  800,  796,  624,  624,  624,  624,  624,
+ /*   170 */   624,  624,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*   180 */   624,  624,  761,  624,  624,  770,  624,  624,  624,  624,
+ /*   190 */   624,  624,  790,  624,  782,  624,  624,  624,  624,  624,
+ /*   200 */   624,  738,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*   210 */   624,  624,  624,  624,  624,  843,  624,  624,  624,  732,
+ /*   220 */   841,  624,  624,  624,  624,  624,  624,  624,  624,  624,
+ /*   230 */   624,  624,  624,  624,  624,  697,  624,  648,  646,  624,
+ /*   240 */   640,  624,
 };
 /********** End of lemon-generated parsing tables *****************************/
 
@@ -526,6 +527,7 @@ static const YYCODETYPE yyFallback[] = {
     0,  /*     BLOCKS => nothing */
     0,  /*      CTIME => nothing */
     0,  /*        WAL => nothing */
+    0,  /*      FSYNC => nothing */
     0,  /*       COMP => nothing */
     0,  /*  PRECISION => nothing */
     0,  /*         LP => nothing */
@@ -817,180 +819,182 @@ static const char *const yyTokenName[] = {
   /*   92 */ "BLOCKS",
   /*   93 */ "CTIME",
   /*   94 */ "WAL",
-  /*   95 */ "COMP",
-  /*   96 */ "PRECISION",
-  /*   97 */ "LP",
-  /*   98 */ "RP",
-  /*   99 */ "TAGS",
-  /*  100 */ "USING",
-  /*  101 */ "AS",
-  /*  102 */ "COMMA",
-  /*  103 */ "NULL",
-  /*  104 */ "SELECT",
-  /*  105 */ "UNION",
-  /*  106 */ "ALL",
-  /*  107 */ "FROM",
-  /*  108 */ "VARIABLE",
-  /*  109 */ "INTERVAL",
-  /*  110 */ "FILL",
-  /*  111 */ "SLIDING",
-  /*  112 */ "ORDER",
-  /*  113 */ "BY",
-  /*  114 */ "ASC",
-  /*  115 */ "DESC",
-  /*  116 */ "GROUP",
-  /*  117 */ "HAVING",
-  /*  118 */ "LIMIT",
-  /*  119 */ "OFFSET",
-  /*  120 */ "SLIMIT",
-  /*  121 */ "SOFFSET",
-  /*  122 */ "WHERE",
-  /*  123 */ "NOW",
-  /*  124 */ "RESET",
-  /*  125 */ "QUERY",
-  /*  126 */ "ADD",
-  /*  127 */ "COLUMN",
-  /*  128 */ "TAG",
-  /*  129 */ "CHANGE",
-  /*  130 */ "SET",
-  /*  131 */ "KILL",
-  /*  132 */ "CONNECTION",
-  /*  133 */ "STREAM",
-  /*  134 */ "COLON",
-  /*  135 */ "ABORT",
-  /*  136 */ "AFTER",
-  /*  137 */ "ATTACH",
-  /*  138 */ "BEFORE",
-  /*  139 */ "BEGIN",
-  /*  140 */ "CASCADE",
-  /*  141 */ "CLUSTER",
-  /*  142 */ "CONFLICT",
-  /*  143 */ "COPY",
-  /*  144 */ "DEFERRED",
-  /*  145 */ "DELIMITERS",
-  /*  146 */ "DETACH",
-  /*  147 */ "EACH",
-  /*  148 */ "END",
-  /*  149 */ "EXPLAIN",
-  /*  150 */ "FAIL",
-  /*  151 */ "FOR",
-  /*  152 */ "IGNORE",
-  /*  153 */ "IMMEDIATE",
-  /*  154 */ "INITIALLY",
-  /*  155 */ "INSTEAD",
-  /*  156 */ "MATCH",
-  /*  157 */ "KEY",
-  /*  158 */ "OF",
-  /*  159 */ "RAISE",
-  /*  160 */ "REPLACE",
-  /*  161 */ "RESTRICT",
-  /*  162 */ "ROW",
-  /*  163 */ "STATEMENT",
-  /*  164 */ "TRIGGER",
-  /*  165 */ "VIEW",
-  /*  166 */ "COUNT",
-  /*  167 */ "SUM",
-  /*  168 */ "AVG",
-  /*  169 */ "MIN",
-  /*  170 */ "MAX",
-  /*  171 */ "FIRST",
-  /*  172 */ "LAST",
-  /*  173 */ "TOP",
-  /*  174 */ "BOTTOM",
-  /*  175 */ "STDDEV",
-  /*  176 */ "PERCENTILE",
-  /*  177 */ "APERCENTILE",
-  /*  178 */ "LEASTSQUARES",
-  /*  179 */ "HISTOGRAM",
-  /*  180 */ "DIFF",
-  /*  181 */ "SPREAD",
-  /*  182 */ "TWA",
-  /*  183 */ "INTERP",
-  /*  184 */ "LAST_ROW",
-  /*  185 */ "RATE",
-  /*  186 */ "IRATE",
-  /*  187 */ "SUM_RATE",
-  /*  188 */ "SUM_IRATE",
-  /*  189 */ "AVG_RATE",
-  /*  190 */ "AVG_IRATE",
-  /*  191 */ "TBID",
-  /*  192 */ "SEMI",
-  /*  193 */ "NONE",
-  /*  194 */ "PREV",
-  /*  195 */ "LINEAR",
-  /*  196 */ "IMPORT",
-  /*  197 */ "METRIC",
-  /*  198 */ "TBNAME",
-  /*  199 */ "JOIN",
-  /*  200 */ "METRICS",
-  /*  201 */ "STABLE",
-  /*  202 */ "INSERT",
-  /*  203 */ "INTO",
-  /*  204 */ "VALUES",
-  /*  205 */ "error",
-  /*  206 */ "program",
-  /*  207 */ "cmd",
-  /*  208 */ "dbPrefix",
-  /*  209 */ "ids",
-  /*  210 */ "cpxName",
-  /*  211 */ "ifexists",
-  /*  212 */ "alter_db_optr",
-  /*  213 */ "acct_optr",
-  /*  214 */ "ifnotexists",
-  /*  215 */ "db_optr",
-  /*  216 */ "pps",
-  /*  217 */ "tseries",
-  /*  218 */ "dbs",
-  /*  219 */ "streams",
-  /*  220 */ "storage",
-  /*  221 */ "qtime",
-  /*  222 */ "users",
-  /*  223 */ "conns",
-  /*  224 */ "state",
-  /*  225 */ "keep",
-  /*  226 */ "tagitemlist",
-  /*  227 */ "tables",
-  /*  228 */ "cache",
-  /*  229 */ "replica",
-  /*  230 */ "days",
-  /*  231 */ "minrows",
-  /*  232 */ "maxrows",
-  /*  233 */ "blocks",
-  /*  234 */ "ctime",
-  /*  235 */ "wal",
-  /*  236 */ "comp",
-  /*  237 */ "prec",
-  /*  238 */ "typename",
-  /*  239 */ "signed",
-  /*  240 */ "create_table_args",
-  /*  241 */ "columnlist",
-  /*  242 */ "select",
-  /*  243 */ "column",
-  /*  244 */ "tagitem",
-  /*  245 */ "selcollist",
-  /*  246 */ "from",
-  /*  247 */ "where_opt",
-  /*  248 */ "interval_opt",
-  /*  249 */ "fill_opt",
-  /*  250 */ "sliding_opt",
-  /*  251 */ "groupby_opt",
-  /*  252 */ "orderby_opt",
-  /*  253 */ "having_opt",
-  /*  254 */ "slimit_opt",
-  /*  255 */ "limit_opt",
-  /*  256 */ "union",
-  /*  257 */ "sclp",
-  /*  258 */ "expr",
-  /*  259 */ "as",
-  /*  260 */ "tablelist",
-  /*  261 */ "tmvar",
-  /*  262 */ "sortlist",
-  /*  263 */ "sortitem",
-  /*  264 */ "item",
-  /*  265 */ "sortorder",
-  /*  266 */ "grouplist",
-  /*  267 */ "exprlist",
-  /*  268 */ "expritem",
+  /*   95 */ "FSYNC",
+  /*   96 */ "COMP",
+  /*   97 */ "PRECISION",
+  /*   98 */ "LP",
+  /*   99 */ "RP",
+  /*  100 */ "TAGS",
+  /*  101 */ "USING",
+  /*  102 */ "AS",
+  /*  103 */ "COMMA",
+  /*  104 */ "NULL",
+  /*  105 */ "SELECT",
+  /*  106 */ "UNION",
+  /*  107 */ "ALL",
+  /*  108 */ "FROM",
+  /*  109 */ "VARIABLE",
+  /*  110 */ "INTERVAL",
+  /*  111 */ "FILL",
+  /*  112 */ "SLIDING",
+  /*  113 */ "ORDER",
+  /*  114 */ "BY",
+  /*  115 */ "ASC",
+  /*  116 */ "DESC",
+  /*  117 */ "GROUP",
+  /*  118 */ "HAVING",
+  /*  119 */ "LIMIT",
+  /*  120 */ "OFFSET",
+  /*  121 */ "SLIMIT",
+  /*  122 */ "SOFFSET",
+  /*  123 */ "WHERE",
+  /*  124 */ "NOW",
+  /*  125 */ "RESET",
+  /*  126 */ "QUERY",
+  /*  127 */ "ADD",
+  /*  128 */ "COLUMN",
+  /*  129 */ "TAG",
+  /*  130 */ "CHANGE",
+  /*  131 */ "SET",
+  /*  132 */ "KILL",
+  /*  133 */ "CONNECTION",
+  /*  134 */ "STREAM",
+  /*  135 */ "COLON",
+  /*  136 */ "ABORT",
+  /*  137 */ "AFTER",
+  /*  138 */ "ATTACH",
+  /*  139 */ "BEFORE",
+  /*  140 */ "BEGIN",
+  /*  141 */ "CASCADE",
+  /*  142 */ "CLUSTER",
+  /*  143 */ "CONFLICT",
+  /*  144 */ "COPY",
+  /*  145 */ "DEFERRED",
+  /*  146 */ "DELIMITERS",
+  /*  147 */ "DETACH",
+  /*  148 */ "EACH",
+  /*  149 */ "END",
+  /*  150 */ "EXPLAIN",
+  /*  151 */ "FAIL",
+  /*  152 */ "FOR",
+  /*  153 */ "IGNORE",
+  /*  154 */ "IMMEDIATE",
+  /*  155 */ "INITIALLY",
+  /*  156 */ "INSTEAD",
+  /*  157 */ "MATCH",
+  /*  158 */ "KEY",
+  /*  159 */ "OF",
+  /*  160 */ "RAISE",
+  /*  161 */ "REPLACE",
+  /*  162 */ "RESTRICT",
+  /*  163 */ "ROW",
+  /*  164 */ "STATEMENT",
+  /*  165 */ "TRIGGER",
+  /*  166 */ "VIEW",
+  /*  167 */ "COUNT",
+  /*  168 */ "SUM",
+  /*  169 */ "AVG",
+  /*  170 */ "MIN",
+  /*  171 */ "MAX",
+  /*  172 */ "FIRST",
+  /*  173 */ "LAST",
+  /*  174 */ "TOP",
+  /*  175 */ "BOTTOM",
+  /*  176 */ "STDDEV",
+  /*  177 */ "PERCENTILE",
+  /*  178 */ "APERCENTILE",
+  /*  179 */ "LEASTSQUARES",
+  /*  180 */ "HISTOGRAM",
+  /*  181 */ "DIFF",
+  /*  182 */ "SPREAD",
+  /*  183 */ "TWA",
+  /*  184 */ "INTERP",
+  /*  185 */ "LAST_ROW",
+  /*  186 */ "RATE",
+  /*  187 */ "IRATE",
+  /*  188 */ "SUM_RATE",
+  /*  189 */ "SUM_IRATE",
+  /*  190 */ "AVG_RATE",
+  /*  191 */ "AVG_IRATE",
+  /*  192 */ "TBID",
+  /*  193 */ "SEMI",
+  /*  194 */ "NONE",
+  /*  195 */ "PREV",
+  /*  196 */ "LINEAR",
+  /*  197 */ "IMPORT",
+  /*  198 */ "METRIC",
+  /*  199 */ "TBNAME",
+  /*  200 */ "JOIN",
+  /*  201 */ "METRICS",
+  /*  202 */ "STABLE",
+  /*  203 */ "INSERT",
+  /*  204 */ "INTO",
+  /*  205 */ "VALUES",
+  /*  206 */ "error",
+  /*  207 */ "program",
+  /*  208 */ "cmd",
+  /*  209 */ "dbPrefix",
+  /*  210 */ "ids",
+  /*  211 */ "cpxName",
+  /*  212 */ "ifexists",
+  /*  213 */ "alter_db_optr",
+  /*  214 */ "acct_optr",
+  /*  215 */ "ifnotexists",
+  /*  216 */ "db_optr",
+  /*  217 */ "pps",
+  /*  218 */ "tseries",
+  /*  219 */ "dbs",
+  /*  220 */ "streams",
+  /*  221 */ "storage",
+  /*  222 */ "qtime",
+  /*  223 */ "users",
+  /*  224 */ "conns",
+  /*  225 */ "state",
+  /*  226 */ "keep",
+  /*  227 */ "tagitemlist",
+  /*  228 */ "tables",
+  /*  229 */ "cache",
+  /*  230 */ "replica",
+  /*  231 */ "days",
+  /*  232 */ "minrows",
+  /*  233 */ "maxrows",
+  /*  234 */ "blocks",
+  /*  235 */ "ctime",
+  /*  236 */ "wal",
+  /*  237 */ "fsync",
+  /*  238 */ "comp",
+  /*  239 */ "prec",
+  /*  240 */ "typename",
+  /*  241 */ "signed",
+  /*  242 */ "create_table_args",
+  /*  243 */ "columnlist",
+  /*  244 */ "select",
+  /*  245 */ "column",
+  /*  246 */ "tagitem",
+  /*  247 */ "selcollist",
+  /*  248 */ "from",
+  /*  249 */ "where_opt",
+  /*  250 */ "interval_opt",
+  /*  251 */ "fill_opt",
+  /*  252 */ "sliding_opt",
+  /*  253 */ "groupby_opt",
+  /*  254 */ "orderby_opt",
+  /*  255 */ "having_opt",
+  /*  256 */ "slimit_opt",
+  /*  257 */ "limit_opt",
+  /*  258 */ "union",
+  /*  259 */ "sclp",
+  /*  260 */ "expr",
+  /*  261 */ "as",
+  /*  262 */ "tablelist",
+  /*  263 */ "tmvar",
+  /*  264 */ "sortlist",
+  /*  265 */ "sortitem",
+  /*  266 */ "item",
+  /*  267 */ "sortorder",
+  /*  268 */ "grouplist",
+  /*  269 */ "exprlist",
+  /*  270 */ "expritem",
 };
 #endif /* defined(YYCOVERAGE) || !defined(NDEBUG) */
 
@@ -1078,146 +1082,149 @@ static const char *const yyRuleName[] = {
  /*  77 */ "blocks ::= BLOCKS INTEGER",
  /*  78 */ "ctime ::= CTIME INTEGER",
  /*  79 */ "wal ::= WAL INTEGER",
- /*  80 */ "comp ::= COMP INTEGER",
- /*  81 */ "prec ::= PRECISION STRING",
- /*  82 */ "db_optr ::=",
- /*  83 */ "db_optr ::= db_optr tables",
- /*  84 */ "db_optr ::= db_optr cache",
- /*  85 */ "db_optr ::= db_optr replica",
- /*  86 */ "db_optr ::= db_optr days",
- /*  87 */ "db_optr ::= db_optr minrows",
- /*  88 */ "db_optr ::= db_optr maxrows",
- /*  89 */ "db_optr ::= db_optr blocks",
- /*  90 */ "db_optr ::= db_optr ctime",
- /*  91 */ "db_optr ::= db_optr wal",
- /*  92 */ "db_optr ::= db_optr comp",
- /*  93 */ "db_optr ::= db_optr prec",
- /*  94 */ "db_optr ::= db_optr keep",
- /*  95 */ "alter_db_optr ::=",
- /*  96 */ "alter_db_optr ::= alter_db_optr replica",
- /*  97 */ "alter_db_optr ::= alter_db_optr tables",
- /*  98 */ "alter_db_optr ::= alter_db_optr keep",
- /*  99 */ "alter_db_optr ::= alter_db_optr blocks",
- /* 100 */ "alter_db_optr ::= alter_db_optr comp",
- /* 101 */ "alter_db_optr ::= alter_db_optr wal",
- /* 102 */ "typename ::= ids",
- /* 103 */ "typename ::= ids LP signed RP",
- /* 104 */ "signed ::= INTEGER",
- /* 105 */ "signed ::= PLUS INTEGER",
- /* 106 */ "signed ::= MINUS INTEGER",
- /* 107 */ "cmd ::= CREATE TABLE ifnotexists ids cpxName create_table_args",
- /* 108 */ "create_table_args ::= LP columnlist RP",
- /* 109 */ "create_table_args ::= LP columnlist RP TAGS LP columnlist RP",
- /* 110 */ "create_table_args ::= USING ids cpxName TAGS LP tagitemlist RP",
- /* 111 */ "create_table_args ::= AS select",
- /* 112 */ "columnlist ::= columnlist COMMA column",
- /* 113 */ "columnlist ::= column",
- /* 114 */ "column ::= ids typename",
- /* 115 */ "tagitemlist ::= tagitemlist COMMA tagitem",
- /* 116 */ "tagitemlist ::= tagitem",
- /* 117 */ "tagitem ::= INTEGER",
- /* 118 */ "tagitem ::= FLOAT",
- /* 119 */ "tagitem ::= STRING",
- /* 120 */ "tagitem ::= BOOL",
- /* 121 */ "tagitem ::= NULL",
- /* 122 */ "tagitem ::= MINUS INTEGER",
- /* 123 */ "tagitem ::= MINUS FLOAT",
- /* 124 */ "tagitem ::= PLUS INTEGER",
- /* 125 */ "tagitem ::= PLUS FLOAT",
- /* 126 */ "select ::= SELECT selcollist from where_opt interval_opt fill_opt sliding_opt groupby_opt orderby_opt having_opt slimit_opt limit_opt",
- /* 127 */ "union ::= select",
- /* 128 */ "union ::= LP union RP",
- /* 129 */ "union ::= union UNION ALL select",
- /* 130 */ "union ::= union UNION ALL LP select RP",
- /* 131 */ "cmd ::= union",
- /* 132 */ "select ::= SELECT selcollist",
- /* 133 */ "sclp ::= selcollist COMMA",
- /* 134 */ "sclp ::=",
- /* 135 */ "selcollist ::= sclp expr as",
- /* 136 */ "selcollist ::= sclp STAR",
- /* 137 */ "as ::= AS ids",
- /* 138 */ "as ::= ids",
- /* 139 */ "as ::=",
- /* 140 */ "from ::= FROM tablelist",
- /* 141 */ "tablelist ::= ids cpxName",
- /* 142 */ "tablelist ::= tablelist COMMA ids cpxName",
- /* 143 */ "tmvar ::= VARIABLE",
- /* 144 */ "interval_opt ::= INTERVAL LP tmvar RP",
- /* 145 */ "interval_opt ::=",
- /* 146 */ "fill_opt ::=",
- /* 147 */ "fill_opt ::= FILL LP ID COMMA tagitemlist RP",
- /* 148 */ "fill_opt ::= FILL LP ID RP",
- /* 149 */ "sliding_opt ::= SLIDING LP tmvar RP",
- /* 150 */ "sliding_opt ::=",
- /* 151 */ "orderby_opt ::=",
- /* 152 */ "orderby_opt ::= ORDER BY sortlist",
- /* 153 */ "sortlist ::= sortlist COMMA item sortorder",
- /* 154 */ "sortlist ::= item sortorder",
- /* 155 */ "item ::= ids cpxName",
- /* 156 */ "sortorder ::= ASC",
- /* 157 */ "sortorder ::= DESC",
- /* 158 */ "sortorder ::=",
- /* 159 */ "groupby_opt ::=",
- /* 160 */ "groupby_opt ::= GROUP BY grouplist",
- /* 161 */ "grouplist ::= grouplist COMMA item",
- /* 162 */ "grouplist ::= item",
- /* 163 */ "having_opt ::=",
- /* 164 */ "having_opt ::= HAVING expr",
- /* 165 */ "limit_opt ::=",
- /* 166 */ "limit_opt ::= LIMIT signed",
- /* 167 */ "limit_opt ::= LIMIT signed OFFSET signed",
- /* 168 */ "limit_opt ::= LIMIT signed COMMA signed",
- /* 169 */ "slimit_opt ::=",
- /* 170 */ "slimit_opt ::= SLIMIT signed",
- /* 171 */ "slimit_opt ::= SLIMIT signed SOFFSET signed",
- /* 172 */ "slimit_opt ::= SLIMIT signed COMMA signed",
- /* 173 */ "where_opt ::=",
- /* 174 */ "where_opt ::= WHERE expr",
- /* 175 */ "expr ::= LP expr RP",
- /* 176 */ "expr ::= ID",
- /* 177 */ "expr ::= ID DOT ID",
- /* 178 */ "expr ::= ID DOT STAR",
- /* 179 */ "expr ::= INTEGER",
- /* 180 */ "expr ::= MINUS INTEGER",
- /* 181 */ "expr ::= PLUS INTEGER",
- /* 182 */ "expr ::= FLOAT",
- /* 183 */ "expr ::= MINUS FLOAT",
- /* 184 */ "expr ::= PLUS FLOAT",
- /* 185 */ "expr ::= STRING",
- /* 186 */ "expr ::= NOW",
- /* 187 */ "expr ::= VARIABLE",
- /* 188 */ "expr ::= BOOL",
- /* 189 */ "expr ::= ID LP exprlist RP",
- /* 190 */ "expr ::= ID LP STAR RP",
- /* 191 */ "expr ::= expr AND expr",
- /* 192 */ "expr ::= expr OR expr",
- /* 193 */ "expr ::= expr LT expr",
- /* 194 */ "expr ::= expr GT expr",
- /* 195 */ "expr ::= expr LE expr",
- /* 196 */ "expr ::= expr GE expr",
- /* 197 */ "expr ::= expr NE expr",
- /* 198 */ "expr ::= expr EQ expr",
- /* 199 */ "expr ::= expr PLUS expr",
- /* 200 */ "expr ::= expr MINUS expr",
- /* 201 */ "expr ::= expr STAR expr",
- /* 202 */ "expr ::= expr SLASH expr",
- /* 203 */ "expr ::= expr REM expr",
- /* 204 */ "expr ::= expr LIKE expr",
- /* 205 */ "expr ::= expr IN LP exprlist RP",
- /* 206 */ "exprlist ::= exprlist COMMA expritem",
- /* 207 */ "exprlist ::= expritem",
- /* 208 */ "expritem ::= expr",
- /* 209 */ "expritem ::=",
- /* 210 */ "cmd ::= RESET QUERY CACHE",
- /* 211 */ "cmd ::= ALTER TABLE ids cpxName ADD COLUMN columnlist",
- /* 212 */ "cmd ::= ALTER TABLE ids cpxName DROP COLUMN ids",
- /* 213 */ "cmd ::= ALTER TABLE ids cpxName ADD TAG columnlist",
- /* 214 */ "cmd ::= ALTER TABLE ids cpxName DROP TAG ids",
- /* 215 */ "cmd ::= ALTER TABLE ids cpxName CHANGE TAG ids ids",
- /* 216 */ "cmd ::= ALTER TABLE ids cpxName SET TAG ids EQ tagitem",
- /* 217 */ "cmd ::= KILL CONNECTION INTEGER",
- /* 218 */ "cmd ::= KILL STREAM INTEGER COLON INTEGER",
- /* 219 */ "cmd ::= KILL QUERY INTEGER COLON INTEGER",
+ /*  80 */ "fsync ::= FSYNC INTEGER",
+ /*  81 */ "comp ::= COMP INTEGER",
+ /*  82 */ "prec ::= PRECISION STRING",
+ /*  83 */ "db_optr ::=",
+ /*  84 */ "db_optr ::= db_optr tables",
+ /*  85 */ "db_optr ::= db_optr cache",
+ /*  86 */ "db_optr ::= db_optr replica",
+ /*  87 */ "db_optr ::= db_optr days",
+ /*  88 */ "db_optr ::= db_optr minrows",
+ /*  89 */ "db_optr ::= db_optr maxrows",
+ /*  90 */ "db_optr ::= db_optr blocks",
+ /*  91 */ "db_optr ::= db_optr ctime",
+ /*  92 */ "db_optr ::= db_optr wal",
+ /*  93 */ "db_optr ::= db_optr fsync",
+ /*  94 */ "db_optr ::= db_optr comp",
+ /*  95 */ "db_optr ::= db_optr prec",
+ /*  96 */ "db_optr ::= db_optr keep",
+ /*  97 */ "alter_db_optr ::=",
+ /*  98 */ "alter_db_optr ::= alter_db_optr replica",
+ /*  99 */ "alter_db_optr ::= alter_db_optr tables",
+ /* 100 */ "alter_db_optr ::= alter_db_optr keep",
+ /* 101 */ "alter_db_optr ::= alter_db_optr blocks",
+ /* 102 */ "alter_db_optr ::= alter_db_optr comp",
+ /* 103 */ "alter_db_optr ::= alter_db_optr wal",
+ /* 104 */ "alter_db_optr ::= alter_db_optr fsync",
+ /* 105 */ "typename ::= ids",
+ /* 106 */ "typename ::= ids LP signed RP",
+ /* 107 */ "signed ::= INTEGER",
+ /* 108 */ "signed ::= PLUS INTEGER",
+ /* 109 */ "signed ::= MINUS INTEGER",
+ /* 110 */ "cmd ::= CREATE TABLE ifnotexists ids cpxName create_table_args",
+ /* 111 */ "create_table_args ::= LP columnlist RP",
+ /* 112 */ "create_table_args ::= LP columnlist RP TAGS LP columnlist RP",
+ /* 113 */ "create_table_args ::= USING ids cpxName TAGS LP tagitemlist RP",
+ /* 114 */ "create_table_args ::= AS select",
+ /* 115 */ "columnlist ::= columnlist COMMA column",
+ /* 116 */ "columnlist ::= column",
+ /* 117 */ "column ::= ids typename",
+ /* 118 */ "tagitemlist ::= tagitemlist COMMA tagitem",
+ /* 119 */ "tagitemlist ::= tagitem",
+ /* 120 */ "tagitem ::= INTEGER",
+ /* 121 */ "tagitem ::= FLOAT",
+ /* 122 */ "tagitem ::= STRING",
+ /* 123 */ "tagitem ::= BOOL",
+ /* 124 */ "tagitem ::= NULL",
+ /* 125 */ "tagitem ::= MINUS INTEGER",
+ /* 126 */ "tagitem ::= MINUS FLOAT",
+ /* 127 */ "tagitem ::= PLUS INTEGER",
+ /* 128 */ "tagitem ::= PLUS FLOAT",
+ /* 129 */ "select ::= SELECT selcollist from where_opt interval_opt fill_opt sliding_opt groupby_opt orderby_opt having_opt slimit_opt limit_opt",
+ /* 130 */ "union ::= select",
+ /* 131 */ "union ::= LP union RP",
+ /* 132 */ "union ::= union UNION ALL select",
+ /* 133 */ "union ::= union UNION ALL LP select RP",
+ /* 134 */ "cmd ::= union",
+ /* 135 */ "select ::= SELECT selcollist",
+ /* 136 */ "sclp ::= selcollist COMMA",
+ /* 137 */ "sclp ::=",
+ /* 138 */ "selcollist ::= sclp expr as",
+ /* 139 */ "selcollist ::= sclp STAR",
+ /* 140 */ "as ::= AS ids",
+ /* 141 */ "as ::= ids",
+ /* 142 */ "as ::=",
+ /* 143 */ "from ::= FROM tablelist",
+ /* 144 */ "tablelist ::= ids cpxName",
+ /* 145 */ "tablelist ::= tablelist COMMA ids cpxName",
+ /* 146 */ "tmvar ::= VARIABLE",
+ /* 147 */ "interval_opt ::= INTERVAL LP tmvar RP",
+ /* 148 */ "interval_opt ::=",
+ /* 149 */ "fill_opt ::=",
+ /* 150 */ "fill_opt ::= FILL LP ID COMMA tagitemlist RP",
+ /* 151 */ "fill_opt ::= FILL LP ID RP",
+ /* 152 */ "sliding_opt ::= SLIDING LP tmvar RP",
+ /* 153 */ "sliding_opt ::=",
+ /* 154 */ "orderby_opt ::=",
+ /* 155 */ "orderby_opt ::= ORDER BY sortlist",
+ /* 156 */ "sortlist ::= sortlist COMMA item sortorder",
+ /* 157 */ "sortlist ::= item sortorder",
+ /* 158 */ "item ::= ids cpxName",
+ /* 159 */ "sortorder ::= ASC",
+ /* 160 */ "sortorder ::= DESC",
+ /* 161 */ "sortorder ::=",
+ /* 162 */ "groupby_opt ::=",
+ /* 163 */ "groupby_opt ::= GROUP BY grouplist",
+ /* 164 */ "grouplist ::= grouplist COMMA item",
+ /* 165 */ "grouplist ::= item",
+ /* 166 */ "having_opt ::=",
+ /* 167 */ "having_opt ::= HAVING expr",
+ /* 168 */ "limit_opt ::=",
+ /* 169 */ "limit_opt ::= LIMIT signed",
+ /* 170 */ "limit_opt ::= LIMIT signed OFFSET signed",
+ /* 171 */ "limit_opt ::= LIMIT signed COMMA signed",
+ /* 172 */ "slimit_opt ::=",
+ /* 173 */ "slimit_opt ::= SLIMIT signed",
+ /* 174 */ "slimit_opt ::= SLIMIT signed SOFFSET signed",
+ /* 175 */ "slimit_opt ::= SLIMIT signed COMMA signed",
+ /* 176 */ "where_opt ::=",
+ /* 177 */ "where_opt ::= WHERE expr",
+ /* 178 */ "expr ::= LP expr RP",
+ /* 179 */ "expr ::= ID",
+ /* 180 */ "expr ::= ID DOT ID",
+ /* 181 */ "expr ::= ID DOT STAR",
+ /* 182 */ "expr ::= INTEGER",
+ /* 183 */ "expr ::= MINUS INTEGER",
+ /* 184 */ "expr ::= PLUS INTEGER",
+ /* 185 */ "expr ::= FLOAT",
+ /* 186 */ "expr ::= MINUS FLOAT",
+ /* 187 */ "expr ::= PLUS FLOAT",
+ /* 188 */ "expr ::= STRING",
+ /* 189 */ "expr ::= NOW",
+ /* 190 */ "expr ::= VARIABLE",
+ /* 191 */ "expr ::= BOOL",
+ /* 192 */ "expr ::= ID LP exprlist RP",
+ /* 193 */ "expr ::= ID LP STAR RP",
+ /* 194 */ "expr ::= expr AND expr",
+ /* 195 */ "expr ::= expr OR expr",
+ /* 196 */ "expr ::= expr LT expr",
+ /* 197 */ "expr ::= expr GT expr",
+ /* 198 */ "expr ::= expr LE expr",
+ /* 199 */ "expr ::= expr GE expr",
+ /* 200 */ "expr ::= expr NE expr",
+ /* 201 */ "expr ::= expr EQ expr",
+ /* 202 */ "expr ::= expr PLUS expr",
+ /* 203 */ "expr ::= expr MINUS expr",
+ /* 204 */ "expr ::= expr STAR expr",
+ /* 205 */ "expr ::= expr SLASH expr",
+ /* 206 */ "expr ::= expr REM expr",
+ /* 207 */ "expr ::= expr LIKE expr",
+ /* 208 */ "expr ::= expr IN LP exprlist RP",
+ /* 209 */ "exprlist ::= exprlist COMMA expritem",
+ /* 210 */ "exprlist ::= expritem",
+ /* 211 */ "expritem ::= expr",
+ /* 212 */ "expritem ::=",
+ /* 213 */ "cmd ::= RESET QUERY CACHE",
+ /* 214 */ "cmd ::= ALTER TABLE ids cpxName ADD COLUMN columnlist",
+ /* 215 */ "cmd ::= ALTER TABLE ids cpxName DROP COLUMN ids",
+ /* 216 */ "cmd ::= ALTER TABLE ids cpxName ADD TAG columnlist",
+ /* 217 */ "cmd ::= ALTER TABLE ids cpxName DROP TAG ids",
+ /* 218 */ "cmd ::= ALTER TABLE ids cpxName CHANGE TAG ids ids",
+ /* 219 */ "cmd ::= ALTER TABLE ids cpxName SET TAG ids EQ tagitem",
+ /* 220 */ "cmd ::= KILL CONNECTION INTEGER",
+ /* 221 */ "cmd ::= KILL STREAM INTEGER COLON INTEGER",
+ /* 222 */ "cmd ::= KILL QUERY INTEGER COLON INTEGER",
 };
 #endif /* NDEBUG */
 
@@ -1338,50 +1345,50 @@ static void yy_destructor(
     ** inside the C code.
     */
 /********* Begin destructor definitions ***************************************/
-    case 225: /* keep */
-    case 226: /* tagitemlist */
-    case 249: /* fill_opt */
-    case 251: /* groupby_opt */
-    case 252: /* orderby_opt */
-    case 262: /* sortlist */
-    case 266: /* grouplist */
+    case 226: /* keep */
+    case 227: /* tagitemlist */
+    case 251: /* fill_opt */
+    case 253: /* groupby_opt */
+    case 254: /* orderby_opt */
+    case 264: /* sortlist */
+    case 268: /* grouplist */
 {
-tVariantListDestroy((yypminor->yy322));
+tVariantListDestroy((yypminor->yy494));
 }
       break;
-    case 241: /* columnlist */
+    case 243: /* columnlist */
 {
-tFieldListDestroy((yypminor->yy369));
+tFieldListDestroy((yypminor->yy449));
 }
       break;
-    case 242: /* select */
+    case 244: /* select */
 {
-doDestroyQuerySql((yypminor->yy190));
+doDestroyQuerySql((yypminor->yy150));
 }
       break;
-    case 245: /* selcollist */
-    case 257: /* sclp */
-    case 267: /* exprlist */
+    case 247: /* selcollist */
+    case 259: /* sclp */
+    case 269: /* exprlist */
 {
-tSQLExprListDestroy((yypminor->yy260));
+tSQLExprListDestroy((yypminor->yy224));
 }
       break;
-    case 247: /* where_opt */
-    case 253: /* having_opt */
-    case 258: /* expr */
-    case 268: /* expritem */
+    case 249: /* where_opt */
+    case 255: /* having_opt */
+    case 260: /* expr */
+    case 270: /* expritem */
 {
-tSQLExprDestroy((yypminor->yy500));
+tSQLExprDestroy((yypminor->yy66));
 }
       break;
-    case 256: /* union */
+    case 258: /* union */
 {
-destroyAllSelectClause((yypminor->yy263));
+destroyAllSelectClause((yypminor->yy25));
 }
       break;
-    case 263: /* sortitem */
+    case 265: /* sortitem */
 {
-tVariantDestroy(&(yypminor->yy518));
+tVariantDestroy(&(yypminor->yy312));
 }
       break;
 /********* End destructor definitions *****************************************/
@@ -1675,226 +1682,229 @@ static const struct {
   YYCODETYPE lhs;       /* Symbol on the left-hand side of the rule */
   signed char nrhs;     /* Negative of the number of RHS symbols in the rule */
 } yyRuleInfo[] = {
-  {  206,   -1 }, /* (0) program ::= cmd */
-  {  207,   -2 }, /* (1) cmd ::= SHOW DATABASES */
-  {  207,   -2 }, /* (2) cmd ::= SHOW MNODES */
-  {  207,   -2 }, /* (3) cmd ::= SHOW DNODES */
-  {  207,   -2 }, /* (4) cmd ::= SHOW ACCOUNTS */
-  {  207,   -2 }, /* (5) cmd ::= SHOW USERS */
-  {  207,   -2 }, /* (6) cmd ::= SHOW MODULES */
-  {  207,   -2 }, /* (7) cmd ::= SHOW QUERIES */
-  {  207,   -2 }, /* (8) cmd ::= SHOW CONNECTIONS */
-  {  207,   -2 }, /* (9) cmd ::= SHOW STREAMS */
-  {  207,   -2 }, /* (10) cmd ::= SHOW CONFIGS */
-  {  207,   -2 }, /* (11) cmd ::= SHOW SCORES */
-  {  207,   -2 }, /* (12) cmd ::= SHOW GRANTS */
-  {  207,   -2 }, /* (13) cmd ::= SHOW VNODES */
-  {  207,   -3 }, /* (14) cmd ::= SHOW VNODES IPTOKEN */
-  {  208,    0 }, /* (15) dbPrefix ::= */
-  {  208,   -2 }, /* (16) dbPrefix ::= ids DOT */
-  {  210,    0 }, /* (17) cpxName ::= */
-  {  210,   -2 }, /* (18) cpxName ::= DOT ids */
-  {  207,   -3 }, /* (19) cmd ::= SHOW dbPrefix TABLES */
-  {  207,   -5 }, /* (20) cmd ::= SHOW dbPrefix TABLES LIKE ids */
-  {  207,   -3 }, /* (21) cmd ::= SHOW dbPrefix STABLES */
-  {  207,   -5 }, /* (22) cmd ::= SHOW dbPrefix STABLES LIKE ids */
-  {  207,   -3 }, /* (23) cmd ::= SHOW dbPrefix VGROUPS */
-  {  207,   -4 }, /* (24) cmd ::= SHOW dbPrefix VGROUPS ids */
-  {  207,   -5 }, /* (25) cmd ::= DROP TABLE ifexists ids cpxName */
-  {  207,   -4 }, /* (26) cmd ::= DROP DATABASE ifexists ids */
-  {  207,   -3 }, /* (27) cmd ::= DROP DNODE ids */
-  {  207,   -3 }, /* (28) cmd ::= DROP USER ids */
-  {  207,   -3 }, /* (29) cmd ::= DROP ACCOUNT ids */
-  {  207,   -2 }, /* (30) cmd ::= USE ids */
-  {  207,   -3 }, /* (31) cmd ::= DESCRIBE ids cpxName */
-  {  207,   -5 }, /* (32) cmd ::= ALTER USER ids PASS ids */
-  {  207,   -5 }, /* (33) cmd ::= ALTER USER ids PRIVILEGE ids */
-  {  207,   -4 }, /* (34) cmd ::= ALTER DNODE ids ids */
-  {  207,   -5 }, /* (35) cmd ::= ALTER DNODE ids ids ids */
-  {  207,   -3 }, /* (36) cmd ::= ALTER LOCAL ids */
-  {  207,   -4 }, /* (37) cmd ::= ALTER LOCAL ids ids */
-  {  207,   -4 }, /* (38) cmd ::= ALTER DATABASE ids alter_db_optr */
-  {  207,   -4 }, /* (39) cmd ::= ALTER ACCOUNT ids acct_optr */
-  {  207,   -6 }, /* (40) cmd ::= ALTER ACCOUNT ids PASS ids acct_optr */
-  {  209,   -1 }, /* (41) ids ::= ID */
-  {  209,   -1 }, /* (42) ids ::= STRING */
-  {  211,   -2 }, /* (43) ifexists ::= IF EXISTS */
-  {  211,    0 }, /* (44) ifexists ::= */
-  {  214,   -3 }, /* (45) ifnotexists ::= IF NOT EXISTS */
-  {  214,    0 }, /* (46) ifnotexists ::= */
-  {  207,   -3 }, /* (47) cmd ::= CREATE DNODE ids */
-  {  207,   -6 }, /* (48) cmd ::= CREATE ACCOUNT ids PASS ids acct_optr */
-  {  207,   -5 }, /* (49) cmd ::= CREATE DATABASE ifnotexists ids db_optr */
-  {  207,   -5 }, /* (50) cmd ::= CREATE USER ids PASS ids */
-  {  216,    0 }, /* (51) pps ::= */
-  {  216,   -2 }, /* (52) pps ::= PPS INTEGER */
-  {  217,    0 }, /* (53) tseries ::= */
-  {  217,   -2 }, /* (54) tseries ::= TSERIES INTEGER */
-  {  218,    0 }, /* (55) dbs ::= */
-  {  218,   -2 }, /* (56) dbs ::= DBS INTEGER */
-  {  219,    0 }, /* (57) streams ::= */
-  {  219,   -2 }, /* (58) streams ::= STREAMS INTEGER */
-  {  220,    0 }, /* (59) storage ::= */
-  {  220,   -2 }, /* (60) storage ::= STORAGE INTEGER */
-  {  221,    0 }, /* (61) qtime ::= */
-  {  221,   -2 }, /* (62) qtime ::= QTIME INTEGER */
-  {  222,    0 }, /* (63) users ::= */
-  {  222,   -2 }, /* (64) users ::= USERS INTEGER */
-  {  223,    0 }, /* (65) conns ::= */
-  {  223,   -2 }, /* (66) conns ::= CONNS INTEGER */
-  {  224,    0 }, /* (67) state ::= */
-  {  224,   -2 }, /* (68) state ::= STATE ids */
-  {  213,   -9 }, /* (69) acct_optr ::= pps tseries storage streams qtime dbs users conns state */
-  {  225,   -2 }, /* (70) keep ::= KEEP tagitemlist */
-  {  227,   -2 }, /* (71) tables ::= MAXTABLES INTEGER */
-  {  228,   -2 }, /* (72) cache ::= CACHE INTEGER */
-  {  229,   -2 }, /* (73) replica ::= REPLICA INTEGER */
-  {  230,   -2 }, /* (74) days ::= DAYS INTEGER */
-  {  231,   -2 }, /* (75) minrows ::= MINROWS INTEGER */
-  {  232,   -2 }, /* (76) maxrows ::= MAXROWS INTEGER */
-  {  233,   -2 }, /* (77) blocks ::= BLOCKS INTEGER */
-  {  234,   -2 }, /* (78) ctime ::= CTIME INTEGER */
-  {  235,   -2 }, /* (79) wal ::= WAL INTEGER */
-  {  236,   -2 }, /* (80) comp ::= COMP INTEGER */
-  {  237,   -2 }, /* (81) prec ::= PRECISION STRING */
-  {  215,    0 }, /* (82) db_optr ::= */
-  {  215,   -2 }, /* (83) db_optr ::= db_optr tables */
-  {  215,   -2 }, /* (84) db_optr ::= db_optr cache */
-  {  215,   -2 }, /* (85) db_optr ::= db_optr replica */
-  {  215,   -2 }, /* (86) db_optr ::= db_optr days */
-  {  215,   -2 }, /* (87) db_optr ::= db_optr minrows */
-  {  215,   -2 }, /* (88) db_optr ::= db_optr maxrows */
-  {  215,   -2 }, /* (89) db_optr ::= db_optr blocks */
-  {  215,   -2 }, /* (90) db_optr ::= db_optr ctime */
-  {  215,   -2 }, /* (91) db_optr ::= db_optr wal */
-  {  215,   -2 }, /* (92) db_optr ::= db_optr comp */
-  {  215,   -2 }, /* (93) db_optr ::= db_optr prec */
-  {  215,   -2 }, /* (94) db_optr ::= db_optr keep */
-  {  212,    0 }, /* (95) alter_db_optr ::= */
-  {  212,   -2 }, /* (96) alter_db_optr ::= alter_db_optr replica */
-  {  212,   -2 }, /* (97) alter_db_optr ::= alter_db_optr tables */
-  {  212,   -2 }, /* (98) alter_db_optr ::= alter_db_optr keep */
-  {  212,   -2 }, /* (99) alter_db_optr ::= alter_db_optr blocks */
-  {  212,   -2 }, /* (100) alter_db_optr ::= alter_db_optr comp */
-  {  212,   -2 }, /* (101) alter_db_optr ::= alter_db_optr wal */
-  {  238,   -1 }, /* (102) typename ::= ids */
-  {  238,   -4 }, /* (103) typename ::= ids LP signed RP */
-  {  239,   -1 }, /* (104) signed ::= INTEGER */
-  {  239,   -2 }, /* (105) signed ::= PLUS INTEGER */
-  {  239,   -2 }, /* (106) signed ::= MINUS INTEGER */
-  {  207,   -6 }, /* (107) cmd ::= CREATE TABLE ifnotexists ids cpxName create_table_args */
-  {  240,   -3 }, /* (108) create_table_args ::= LP columnlist RP */
-  {  240,   -7 }, /* (109) create_table_args ::= LP columnlist RP TAGS LP columnlist RP */
-  {  240,   -7 }, /* (110) create_table_args ::= USING ids cpxName TAGS LP tagitemlist RP */
-  {  240,   -2 }, /* (111) create_table_args ::= AS select */
-  {  241,   -3 }, /* (112) columnlist ::= columnlist COMMA column */
-  {  241,   -1 }, /* (113) columnlist ::= column */
-  {  243,   -2 }, /* (114) column ::= ids typename */
-  {  226,   -3 }, /* (115) tagitemlist ::= tagitemlist COMMA tagitem */
-  {  226,   -1 }, /* (116) tagitemlist ::= tagitem */
-  {  244,   -1 }, /* (117) tagitem ::= INTEGER */
-  {  244,   -1 }, /* (118) tagitem ::= FLOAT */
-  {  244,   -1 }, /* (119) tagitem ::= STRING */
-  {  244,   -1 }, /* (120) tagitem ::= BOOL */
-  {  244,   -1 }, /* (121) tagitem ::= NULL */
-  {  244,   -2 }, /* (122) tagitem ::= MINUS INTEGER */
-  {  244,   -2 }, /* (123) tagitem ::= MINUS FLOAT */
-  {  244,   -2 }, /* (124) tagitem ::= PLUS INTEGER */
-  {  244,   -2 }, /* (125) tagitem ::= PLUS FLOAT */
-  {  242,  -12 }, /* (126) select ::= SELECT selcollist from where_opt interval_opt fill_opt sliding_opt groupby_opt orderby_opt having_opt slimit_opt limit_opt */
-  {  256,   -1 }, /* (127) union ::= select */
-  {  256,   -3 }, /* (128) union ::= LP union RP */
-  {  256,   -4 }, /* (129) union ::= union UNION ALL select */
-  {  256,   -6 }, /* (130) union ::= union UNION ALL LP select RP */
-  {  207,   -1 }, /* (131) cmd ::= union */
-  {  242,   -2 }, /* (132) select ::= SELECT selcollist */
-  {  257,   -2 }, /* (133) sclp ::= selcollist COMMA */
-  {  257,    0 }, /* (134) sclp ::= */
-  {  245,   -3 }, /* (135) selcollist ::= sclp expr as */
-  {  245,   -2 }, /* (136) selcollist ::= sclp STAR */
-  {  259,   -2 }, /* (137) as ::= AS ids */
-  {  259,   -1 }, /* (138) as ::= ids */
-  {  259,    0 }, /* (139) as ::= */
-  {  246,   -2 }, /* (140) from ::= FROM tablelist */
-  {  260,   -2 }, /* (141) tablelist ::= ids cpxName */
-  {  260,   -4 }, /* (142) tablelist ::= tablelist COMMA ids cpxName */
-  {  261,   -1 }, /* (143) tmvar ::= VARIABLE */
-  {  248,   -4 }, /* (144) interval_opt ::= INTERVAL LP tmvar RP */
-  {  248,    0 }, /* (145) interval_opt ::= */
-  {  249,    0 }, /* (146) fill_opt ::= */
-  {  249,   -6 }, /* (147) fill_opt ::= FILL LP ID COMMA tagitemlist RP */
-  {  249,   -4 }, /* (148) fill_opt ::= FILL LP ID RP */
-  {  250,   -4 }, /* (149) sliding_opt ::= SLIDING LP tmvar RP */
-  {  250,    0 }, /* (150) sliding_opt ::= */
-  {  252,    0 }, /* (151) orderby_opt ::= */
-  {  252,   -3 }, /* (152) orderby_opt ::= ORDER BY sortlist */
-  {  262,   -4 }, /* (153) sortlist ::= sortlist COMMA item sortorder */
-  {  262,   -2 }, /* (154) sortlist ::= item sortorder */
-  {  264,   -2 }, /* (155) item ::= ids cpxName */
-  {  265,   -1 }, /* (156) sortorder ::= ASC */
-  {  265,   -1 }, /* (157) sortorder ::= DESC */
-  {  265,    0 }, /* (158) sortorder ::= */
-  {  251,    0 }, /* (159) groupby_opt ::= */
-  {  251,   -3 }, /* (160) groupby_opt ::= GROUP BY grouplist */
-  {  266,   -3 }, /* (161) grouplist ::= grouplist COMMA item */
-  {  266,   -1 }, /* (162) grouplist ::= item */
-  {  253,    0 }, /* (163) having_opt ::= */
-  {  253,   -2 }, /* (164) having_opt ::= HAVING expr */
-  {  255,    0 }, /* (165) limit_opt ::= */
-  {  255,   -2 }, /* (166) limit_opt ::= LIMIT signed */
-  {  255,   -4 }, /* (167) limit_opt ::= LIMIT signed OFFSET signed */
-  {  255,   -4 }, /* (168) limit_opt ::= LIMIT signed COMMA signed */
-  {  254,    0 }, /* (169) slimit_opt ::= */
-  {  254,   -2 }, /* (170) slimit_opt ::= SLIMIT signed */
-  {  254,   -4 }, /* (171) slimit_opt ::= SLIMIT signed SOFFSET signed */
-  {  254,   -4 }, /* (172) slimit_opt ::= SLIMIT signed COMMA signed */
-  {  247,    0 }, /* (173) where_opt ::= */
-  {  247,   -2 }, /* (174) where_opt ::= WHERE expr */
-  {  258,   -3 }, /* (175) expr ::= LP expr RP */
-  {  258,   -1 }, /* (176) expr ::= ID */
-  {  258,   -3 }, /* (177) expr ::= ID DOT ID */
-  {  258,   -3 }, /* (178) expr ::= ID DOT STAR */
-  {  258,   -1 }, /* (179) expr ::= INTEGER */
-  {  258,   -2 }, /* (180) expr ::= MINUS INTEGER */
-  {  258,   -2 }, /* (181) expr ::= PLUS INTEGER */
-  {  258,   -1 }, /* (182) expr ::= FLOAT */
-  {  258,   -2 }, /* (183) expr ::= MINUS FLOAT */
-  {  258,   -2 }, /* (184) expr ::= PLUS FLOAT */
-  {  258,   -1 }, /* (185) expr ::= STRING */
-  {  258,   -1 }, /* (186) expr ::= NOW */
-  {  258,   -1 }, /* (187) expr ::= VARIABLE */
-  {  258,   -1 }, /* (188) expr ::= BOOL */
-  {  258,   -4 }, /* (189) expr ::= ID LP exprlist RP */
-  {  258,   -4 }, /* (190) expr ::= ID LP STAR RP */
-  {  258,   -3 }, /* (191) expr ::= expr AND expr */
-  {  258,   -3 }, /* (192) expr ::= expr OR expr */
-  {  258,   -3 }, /* (193) expr ::= expr LT expr */
-  {  258,   -3 }, /* (194) expr ::= expr GT expr */
-  {  258,   -3 }, /* (195) expr ::= expr LE expr */
-  {  258,   -3 }, /* (196) expr ::= expr GE expr */
-  {  258,   -3 }, /* (197) expr ::= expr NE expr */
-  {  258,   -3 }, /* (198) expr ::= expr EQ expr */
-  {  258,   -3 }, /* (199) expr ::= expr PLUS expr */
-  {  258,   -3 }, /* (200) expr ::= expr MINUS expr */
-  {  258,   -3 }, /* (201) expr ::= expr STAR expr */
-  {  258,   -3 }, /* (202) expr ::= expr SLASH expr */
-  {  258,   -3 }, /* (203) expr ::= expr REM expr */
-  {  258,   -3 }, /* (204) expr ::= expr LIKE expr */
-  {  258,   -5 }, /* (205) expr ::= expr IN LP exprlist RP */
-  {  267,   -3 }, /* (206) exprlist ::= exprlist COMMA expritem */
-  {  267,   -1 }, /* (207) exprlist ::= expritem */
-  {  268,   -1 }, /* (208) expritem ::= expr */
-  {  268,    0 }, /* (209) expritem ::= */
-  {  207,   -3 }, /* (210) cmd ::= RESET QUERY CACHE */
-  {  207,   -7 }, /* (211) cmd ::= ALTER TABLE ids cpxName ADD COLUMN columnlist */
-  {  207,   -7 }, /* (212) cmd ::= ALTER TABLE ids cpxName DROP COLUMN ids */
-  {  207,   -7 }, /* (213) cmd ::= ALTER TABLE ids cpxName ADD TAG columnlist */
-  {  207,   -7 }, /* (214) cmd ::= ALTER TABLE ids cpxName DROP TAG ids */
-  {  207,   -8 }, /* (215) cmd ::= ALTER TABLE ids cpxName CHANGE TAG ids ids */
-  {  207,   -9 }, /* (216) cmd ::= ALTER TABLE ids cpxName SET TAG ids EQ tagitem */
-  {  207,   -3 }, /* (217) cmd ::= KILL CONNECTION INTEGER */
-  {  207,   -5 }, /* (218) cmd ::= KILL STREAM INTEGER COLON INTEGER */
-  {  207,   -5 }, /* (219) cmd ::= KILL QUERY INTEGER COLON INTEGER */
+  {  207,   -1 }, /* (0) program ::= cmd */
+  {  208,   -2 }, /* (1) cmd ::= SHOW DATABASES */
+  {  208,   -2 }, /* (2) cmd ::= SHOW MNODES */
+  {  208,   -2 }, /* (3) cmd ::= SHOW DNODES */
+  {  208,   -2 }, /* (4) cmd ::= SHOW ACCOUNTS */
+  {  208,   -2 }, /* (5) cmd ::= SHOW USERS */
+  {  208,   -2 }, /* (6) cmd ::= SHOW MODULES */
+  {  208,   -2 }, /* (7) cmd ::= SHOW QUERIES */
+  {  208,   -2 }, /* (8) cmd ::= SHOW CONNECTIONS */
+  {  208,   -2 }, /* (9) cmd ::= SHOW STREAMS */
+  {  208,   -2 }, /* (10) cmd ::= SHOW CONFIGS */
+  {  208,   -2 }, /* (11) cmd ::= SHOW SCORES */
+  {  208,   -2 }, /* (12) cmd ::= SHOW GRANTS */
+  {  208,   -2 }, /* (13) cmd ::= SHOW VNODES */
+  {  208,   -3 }, /* (14) cmd ::= SHOW VNODES IPTOKEN */
+  {  209,    0 }, /* (15) dbPrefix ::= */
+  {  209,   -2 }, /* (16) dbPrefix ::= ids DOT */
+  {  211,    0 }, /* (17) cpxName ::= */
+  {  211,   -2 }, /* (18) cpxName ::= DOT ids */
+  {  208,   -3 }, /* (19) cmd ::= SHOW dbPrefix TABLES */
+  {  208,   -5 }, /* (20) cmd ::= SHOW dbPrefix TABLES LIKE ids */
+  {  208,   -3 }, /* (21) cmd ::= SHOW dbPrefix STABLES */
+  {  208,   -5 }, /* (22) cmd ::= SHOW dbPrefix STABLES LIKE ids */
+  {  208,   -3 }, /* (23) cmd ::= SHOW dbPrefix VGROUPS */
+  {  208,   -4 }, /* (24) cmd ::= SHOW dbPrefix VGROUPS ids */
+  {  208,   -5 }, /* (25) cmd ::= DROP TABLE ifexists ids cpxName */
+  {  208,   -4 }, /* (26) cmd ::= DROP DATABASE ifexists ids */
+  {  208,   -3 }, /* (27) cmd ::= DROP DNODE ids */
+  {  208,   -3 }, /* (28) cmd ::= DROP USER ids */
+  {  208,   -3 }, /* (29) cmd ::= DROP ACCOUNT ids */
+  {  208,   -2 }, /* (30) cmd ::= USE ids */
+  {  208,   -3 }, /* (31) cmd ::= DESCRIBE ids cpxName */
+  {  208,   -5 }, /* (32) cmd ::= ALTER USER ids PASS ids */
+  {  208,   -5 }, /* (33) cmd ::= ALTER USER ids PRIVILEGE ids */
+  {  208,   -4 }, /* (34) cmd ::= ALTER DNODE ids ids */
+  {  208,   -5 }, /* (35) cmd ::= ALTER DNODE ids ids ids */
+  {  208,   -3 }, /* (36) cmd ::= ALTER LOCAL ids */
+  {  208,   -4 }, /* (37) cmd ::= ALTER LOCAL ids ids */
+  {  208,   -4 }, /* (38) cmd ::= ALTER DATABASE ids alter_db_optr */
+  {  208,   -4 }, /* (39) cmd ::= ALTER ACCOUNT ids acct_optr */
+  {  208,   -6 }, /* (40) cmd ::= ALTER ACCOUNT ids PASS ids acct_optr */
+  {  210,   -1 }, /* (41) ids ::= ID */
+  {  210,   -1 }, /* (42) ids ::= STRING */
+  {  212,   -2 }, /* (43) ifexists ::= IF EXISTS */
+  {  212,    0 }, /* (44) ifexists ::= */
+  {  215,   -3 }, /* (45) ifnotexists ::= IF NOT EXISTS */
+  {  215,    0 }, /* (46) ifnotexists ::= */
+  {  208,   -3 }, /* (47) cmd ::= CREATE DNODE ids */
+  {  208,   -6 }, /* (48) cmd ::= CREATE ACCOUNT ids PASS ids acct_optr */
+  {  208,   -5 }, /* (49) cmd ::= CREATE DATABASE ifnotexists ids db_optr */
+  {  208,   -5 }, /* (50) cmd ::= CREATE USER ids PASS ids */
+  {  217,    0 }, /* (51) pps ::= */
+  {  217,   -2 }, /* (52) pps ::= PPS INTEGER */
+  {  218,    0 }, /* (53) tseries ::= */
+  {  218,   -2 }, /* (54) tseries ::= TSERIES INTEGER */
+  {  219,    0 }, /* (55) dbs ::= */
+  {  219,   -2 }, /* (56) dbs ::= DBS INTEGER */
+  {  220,    0 }, /* (57) streams ::= */
+  {  220,   -2 }, /* (58) streams ::= STREAMS INTEGER */
+  {  221,    0 }, /* (59) storage ::= */
+  {  221,   -2 }, /* (60) storage ::= STORAGE INTEGER */
+  {  222,    0 }, /* (61) qtime ::= */
+  {  222,   -2 }, /* (62) qtime ::= QTIME INTEGER */
+  {  223,    0 }, /* (63) users ::= */
+  {  223,   -2 }, /* (64) users ::= USERS INTEGER */
+  {  224,    0 }, /* (65) conns ::= */
+  {  224,   -2 }, /* (66) conns ::= CONNS INTEGER */
+  {  225,    0 }, /* (67) state ::= */
+  {  225,   -2 }, /* (68) state ::= STATE ids */
+  {  214,   -9 }, /* (69) acct_optr ::= pps tseries storage streams qtime dbs users conns state */
+  {  226,   -2 }, /* (70) keep ::= KEEP tagitemlist */
+  {  228,   -2 }, /* (71) tables ::= MAXTABLES INTEGER */
+  {  229,   -2 }, /* (72) cache ::= CACHE INTEGER */
+  {  230,   -2 }, /* (73) replica ::= REPLICA INTEGER */
+  {  231,   -2 }, /* (74) days ::= DAYS INTEGER */
+  {  232,   -2 }, /* (75) minrows ::= MINROWS INTEGER */
+  {  233,   -2 }, /* (76) maxrows ::= MAXROWS INTEGER */
+  {  234,   -2 }, /* (77) blocks ::= BLOCKS INTEGER */
+  {  235,   -2 }, /* (78) ctime ::= CTIME INTEGER */
+  {  236,   -2 }, /* (79) wal ::= WAL INTEGER */
+  {  237,   -2 }, /* (80) fsync ::= FSYNC INTEGER */
+  {  238,   -2 }, /* (81) comp ::= COMP INTEGER */
+  {  239,   -2 }, /* (82) prec ::= PRECISION STRING */
+  {  216,    0 }, /* (83) db_optr ::= */
+  {  216,   -2 }, /* (84) db_optr ::= db_optr tables */
+  {  216,   -2 }, /* (85) db_optr ::= db_optr cache */
+  {  216,   -2 }, /* (86) db_optr ::= db_optr replica */
+  {  216,   -2 }, /* (87) db_optr ::= db_optr days */
+  {  216,   -2 }, /* (88) db_optr ::= db_optr minrows */
+  {  216,   -2 }, /* (89) db_optr ::= db_optr maxrows */
+  {  216,   -2 }, /* (90) db_optr ::= db_optr blocks */
+  {  216,   -2 }, /* (91) db_optr ::= db_optr ctime */
+  {  216,   -2 }, /* (92) db_optr ::= db_optr wal */
+  {  216,   -2 }, /* (93) db_optr ::= db_optr fsync */
+  {  216,   -2 }, /* (94) db_optr ::= db_optr comp */
+  {  216,   -2 }, /* (95) db_optr ::= db_optr prec */
+  {  216,   -2 }, /* (96) db_optr ::= db_optr keep */
+  {  213,    0 }, /* (97) alter_db_optr ::= */
+  {  213,   -2 }, /* (98) alter_db_optr ::= alter_db_optr replica */
+  {  213,   -2 }, /* (99) alter_db_optr ::= alter_db_optr tables */
+  {  213,   -2 }, /* (100) alter_db_optr ::= alter_db_optr keep */
+  {  213,   -2 }, /* (101) alter_db_optr ::= alter_db_optr blocks */
+  {  213,   -2 }, /* (102) alter_db_optr ::= alter_db_optr comp */
+  {  213,   -2 }, /* (103) alter_db_optr ::= alter_db_optr wal */
+  {  213,   -2 }, /* (104) alter_db_optr ::= alter_db_optr fsync */
+  {  240,   -1 }, /* (105) typename ::= ids */
+  {  240,   -4 }, /* (106) typename ::= ids LP signed RP */
+  {  241,   -1 }, /* (107) signed ::= INTEGER */
+  {  241,   -2 }, /* (108) signed ::= PLUS INTEGER */
+  {  241,   -2 }, /* (109) signed ::= MINUS INTEGER */
+  {  208,   -6 }, /* (110) cmd ::= CREATE TABLE ifnotexists ids cpxName create_table_args */
+  {  242,   -3 }, /* (111) create_table_args ::= LP columnlist RP */
+  {  242,   -7 }, /* (112) create_table_args ::= LP columnlist RP TAGS LP columnlist RP */
+  {  242,   -7 }, /* (113) create_table_args ::= USING ids cpxName TAGS LP tagitemlist RP */
+  {  242,   -2 }, /* (114) create_table_args ::= AS select */
+  {  243,   -3 }, /* (115) columnlist ::= columnlist COMMA column */
+  {  243,   -1 }, /* (116) columnlist ::= column */
+  {  245,   -2 }, /* (117) column ::= ids typename */
+  {  227,   -3 }, /* (118) tagitemlist ::= tagitemlist COMMA tagitem */
+  {  227,   -1 }, /* (119) tagitemlist ::= tagitem */
+  {  246,   -1 }, /* (120) tagitem ::= INTEGER */
+  {  246,   -1 }, /* (121) tagitem ::= FLOAT */
+  {  246,   -1 }, /* (122) tagitem ::= STRING */
+  {  246,   -1 }, /* (123) tagitem ::= BOOL */
+  {  246,   -1 }, /* (124) tagitem ::= NULL */
+  {  246,   -2 }, /* (125) tagitem ::= MINUS INTEGER */
+  {  246,   -2 }, /* (126) tagitem ::= MINUS FLOAT */
+  {  246,   -2 }, /* (127) tagitem ::= PLUS INTEGER */
+  {  246,   -2 }, /* (128) tagitem ::= PLUS FLOAT */
+  {  244,  -12 }, /* (129) select ::= SELECT selcollist from where_opt interval_opt fill_opt sliding_opt groupby_opt orderby_opt having_opt slimit_opt limit_opt */
+  {  258,   -1 }, /* (130) union ::= select */
+  {  258,   -3 }, /* (131) union ::= LP union RP */
+  {  258,   -4 }, /* (132) union ::= union UNION ALL select */
+  {  258,   -6 }, /* (133) union ::= union UNION ALL LP select RP */
+  {  208,   -1 }, /* (134) cmd ::= union */
+  {  244,   -2 }, /* (135) select ::= SELECT selcollist */
+  {  259,   -2 }, /* (136) sclp ::= selcollist COMMA */
+  {  259,    0 }, /* (137) sclp ::= */
+  {  247,   -3 }, /* (138) selcollist ::= sclp expr as */
+  {  247,   -2 }, /* (139) selcollist ::= sclp STAR */
+  {  261,   -2 }, /* (140) as ::= AS ids */
+  {  261,   -1 }, /* (141) as ::= ids */
+  {  261,    0 }, /* (142) as ::= */
+  {  248,   -2 }, /* (143) from ::= FROM tablelist */
+  {  262,   -2 }, /* (144) tablelist ::= ids cpxName */
+  {  262,   -4 }, /* (145) tablelist ::= tablelist COMMA ids cpxName */
+  {  263,   -1 }, /* (146) tmvar ::= VARIABLE */
+  {  250,   -4 }, /* (147) interval_opt ::= INTERVAL LP tmvar RP */
+  {  250,    0 }, /* (148) interval_opt ::= */
+  {  251,    0 }, /* (149) fill_opt ::= */
+  {  251,   -6 }, /* (150) fill_opt ::= FILL LP ID COMMA tagitemlist RP */
+  {  251,   -4 }, /* (151) fill_opt ::= FILL LP ID RP */
+  {  252,   -4 }, /* (152) sliding_opt ::= SLIDING LP tmvar RP */
+  {  252,    0 }, /* (153) sliding_opt ::= */
+  {  254,    0 }, /* (154) orderby_opt ::= */
+  {  254,   -3 }, /* (155) orderby_opt ::= ORDER BY sortlist */
+  {  264,   -4 }, /* (156) sortlist ::= sortlist COMMA item sortorder */
+  {  264,   -2 }, /* (157) sortlist ::= item sortorder */
+  {  266,   -2 }, /* (158) item ::= ids cpxName */
+  {  267,   -1 }, /* (159) sortorder ::= ASC */
+  {  267,   -1 }, /* (160) sortorder ::= DESC */
+  {  267,    0 }, /* (161) sortorder ::= */
+  {  253,    0 }, /* (162) groupby_opt ::= */
+  {  253,   -3 }, /* (163) groupby_opt ::= GROUP BY grouplist */
+  {  268,   -3 }, /* (164) grouplist ::= grouplist COMMA item */
+  {  268,   -1 }, /* (165) grouplist ::= item */
+  {  255,    0 }, /* (166) having_opt ::= */
+  {  255,   -2 }, /* (167) having_opt ::= HAVING expr */
+  {  257,    0 }, /* (168) limit_opt ::= */
+  {  257,   -2 }, /* (169) limit_opt ::= LIMIT signed */
+  {  257,   -4 }, /* (170) limit_opt ::= LIMIT signed OFFSET signed */
+  {  257,   -4 }, /* (171) limit_opt ::= LIMIT signed COMMA signed */
+  {  256,    0 }, /* (172) slimit_opt ::= */
+  {  256,   -2 }, /* (173) slimit_opt ::= SLIMIT signed */
+  {  256,   -4 }, /* (174) slimit_opt ::= SLIMIT signed SOFFSET signed */
+  {  256,   -4 }, /* (175) slimit_opt ::= SLIMIT signed COMMA signed */
+  {  249,    0 }, /* (176) where_opt ::= */
+  {  249,   -2 }, /* (177) where_opt ::= WHERE expr */
+  {  260,   -3 }, /* (178) expr ::= LP expr RP */
+  {  260,   -1 }, /* (179) expr ::= ID */
+  {  260,   -3 }, /* (180) expr ::= ID DOT ID */
+  {  260,   -3 }, /* (181) expr ::= ID DOT STAR */
+  {  260,   -1 }, /* (182) expr ::= INTEGER */
+  {  260,   -2 }, /* (183) expr ::= MINUS INTEGER */
+  {  260,   -2 }, /* (184) expr ::= PLUS INTEGER */
+  {  260,   -1 }, /* (185) expr ::= FLOAT */
+  {  260,   -2 }, /* (186) expr ::= MINUS FLOAT */
+  {  260,   -2 }, /* (187) expr ::= PLUS FLOAT */
+  {  260,   -1 }, /* (188) expr ::= STRING */
+  {  260,   -1 }, /* (189) expr ::= NOW */
+  {  260,   -1 }, /* (190) expr ::= VARIABLE */
+  {  260,   -1 }, /* (191) expr ::= BOOL */
+  {  260,   -4 }, /* (192) expr ::= ID LP exprlist RP */
+  {  260,   -4 }, /* (193) expr ::= ID LP STAR RP */
+  {  260,   -3 }, /* (194) expr ::= expr AND expr */
+  {  260,   -3 }, /* (195) expr ::= expr OR expr */
+  {  260,   -3 }, /* (196) expr ::= expr LT expr */
+  {  260,   -3 }, /* (197) expr ::= expr GT expr */
+  {  260,   -3 }, /* (198) expr ::= expr LE expr */
+  {  260,   -3 }, /* (199) expr ::= expr GE expr */
+  {  260,   -3 }, /* (200) expr ::= expr NE expr */
+  {  260,   -3 }, /* (201) expr ::= expr EQ expr */
+  {  260,   -3 }, /* (202) expr ::= expr PLUS expr */
+  {  260,   -3 }, /* (203) expr ::= expr MINUS expr */
+  {  260,   -3 }, /* (204) expr ::= expr STAR expr */
+  {  260,   -3 }, /* (205) expr ::= expr SLASH expr */
+  {  260,   -3 }, /* (206) expr ::= expr REM expr */
+  {  260,   -3 }, /* (207) expr ::= expr LIKE expr */
+  {  260,   -5 }, /* (208) expr ::= expr IN LP exprlist RP */
+  {  269,   -3 }, /* (209) exprlist ::= exprlist COMMA expritem */
+  {  269,   -1 }, /* (210) exprlist ::= expritem */
+  {  270,   -1 }, /* (211) expritem ::= expr */
+  {  270,    0 }, /* (212) expritem ::= */
+  {  208,   -3 }, /* (213) cmd ::= RESET QUERY CACHE */
+  {  208,   -7 }, /* (214) cmd ::= ALTER TABLE ids cpxName ADD COLUMN columnlist */
+  {  208,   -7 }, /* (215) cmd ::= ALTER TABLE ids cpxName DROP COLUMN ids */
+  {  208,   -7 }, /* (216) cmd ::= ALTER TABLE ids cpxName ADD TAG columnlist */
+  {  208,   -7 }, /* (217) cmd ::= ALTER TABLE ids cpxName DROP TAG ids */
+  {  208,   -8 }, /* (218) cmd ::= ALTER TABLE ids cpxName CHANGE TAG ids ids */
+  {  208,   -9 }, /* (219) cmd ::= ALTER TABLE ids cpxName SET TAG ids EQ tagitem */
+  {  208,   -3 }, /* (220) cmd ::= KILL CONNECTION INTEGER */
+  {  208,   -5 }, /* (221) cmd ::= KILL STREAM INTEGER COLON INTEGER */
+  {  208,   -5 }, /* (222) cmd ::= KILL QUERY INTEGER COLON INTEGER */
 };
 
 static void yy_accept(yyParser*);  /* Forward Declaration */
@@ -2114,13 +2124,13 @@ static void yy_reduce(
 { setDCLSQLElems(pInfo, TSDB_SQL_CFG_LOCAL, 2, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);          }
         break;
       case 38: /* cmd ::= ALTER DATABASE ids alter_db_optr */
-{ SSQLToken t = {0};  setCreateDBSQL(pInfo, TSDB_SQL_ALTER_DB, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy374, &t);}
+{ SSQLToken t = {0};  setCreateDBSQL(pInfo, TSDB_SQL_ALTER_DB, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy158, &t);}
         break;
       case 39: /* cmd ::= ALTER ACCOUNT ids acct_optr */
-{ setCreateAcctSQL(pInfo, TSDB_SQL_ALTER_ACCT, &yymsp[-1].minor.yy0, NULL, &yymsp[0].minor.yy219);}
+{ setCreateAcctSQL(pInfo, TSDB_SQL_ALTER_ACCT, &yymsp[-1].minor.yy0, NULL, &yymsp[0].minor.yy73);}
         break;
       case 40: /* cmd ::= ALTER ACCOUNT ids PASS ids acct_optr */
-{ setCreateAcctSQL(pInfo, TSDB_SQL_ALTER_ACCT, &yymsp[-3].minor.yy0, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy219);}
+{ setCreateAcctSQL(pInfo, TSDB_SQL_ALTER_ACCT, &yymsp[-3].minor.yy0, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy73);}
         break;
       case 41: /* ids ::= ID */
       case 42: /* ids ::= STRING */ yytestcase(yyruleno==42);
@@ -2141,10 +2151,10 @@ static void yy_reduce(
 { setDCLSQLElems(pInfo, TSDB_SQL_CREATE_DNODE, 1, &yymsp[0].minor.yy0);}
         break;
       case 48: /* cmd ::= CREATE ACCOUNT ids PASS ids acct_optr */
-{ setCreateAcctSQL(pInfo, TSDB_SQL_CREATE_ACCT, &yymsp[-3].minor.yy0, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy219);}
+{ setCreateAcctSQL(pInfo, TSDB_SQL_CREATE_ACCT, &yymsp[-3].minor.yy0, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy73);}
         break;
       case 49: /* cmd ::= CREATE DATABASE ifnotexists ids db_optr */
-{ setCreateDBSQL(pInfo, TSDB_SQL_CREATE_DB, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy374, &yymsp[-2].minor.yy0);}
+{ setCreateDBSQL(pInfo, TSDB_SQL_CREATE_DB, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy158, &yymsp[-2].minor.yy0);}
         break;
       case 50: /* cmd ::= CREATE USER ids PASS ids */
 { setCreateUserSQL(pInfo, &yymsp[-2].minor.yy0, &yymsp[0].minor.yy0);}
@@ -2173,20 +2183,20 @@ static void yy_reduce(
         break;
       case 69: /* acct_optr ::= pps tseries storage streams qtime dbs users conns state */
 {
-    yylhsminor.yy219.maxUsers   = (yymsp[-2].minor.yy0.n>0)?atoi(yymsp[-2].minor.yy0.z):-1;
-    yylhsminor.yy219.maxDbs     = (yymsp[-3].minor.yy0.n>0)?atoi(yymsp[-3].minor.yy0.z):-1;
-    yylhsminor.yy219.maxTimeSeries = (yymsp[-7].minor.yy0.n>0)?atoi(yymsp[-7].minor.yy0.z):-1;
-    yylhsminor.yy219.maxStreams = (yymsp[-5].minor.yy0.n>0)?atoi(yymsp[-5].minor.yy0.z):-1;
-    yylhsminor.yy219.maxPointsPerSecond     = (yymsp[-8].minor.yy0.n>0)?atoi(yymsp[-8].minor.yy0.z):-1;
-    yylhsminor.yy219.maxStorage = (yymsp[-6].minor.yy0.n>0)?strtoll(yymsp[-6].minor.yy0.z, NULL, 10):-1;
-    yylhsminor.yy219.maxQueryTime   = (yymsp[-4].minor.yy0.n>0)?strtoll(yymsp[-4].minor.yy0.z, NULL, 10):-1;
-    yylhsminor.yy219.maxConnections   = (yymsp[-1].minor.yy0.n>0)?atoi(yymsp[-1].minor.yy0.z):-1;
-    yylhsminor.yy219.stat    = yymsp[0].minor.yy0;
+    yylhsminor.yy73.maxUsers   = (yymsp[-2].minor.yy0.n>0)?atoi(yymsp[-2].minor.yy0.z):-1;
+    yylhsminor.yy73.maxDbs     = (yymsp[-3].minor.yy0.n>0)?atoi(yymsp[-3].minor.yy0.z):-1;
+    yylhsminor.yy73.maxTimeSeries = (yymsp[-7].minor.yy0.n>0)?atoi(yymsp[-7].minor.yy0.z):-1;
+    yylhsminor.yy73.maxStreams = (yymsp[-5].minor.yy0.n>0)?atoi(yymsp[-5].minor.yy0.z):-1;
+    yylhsminor.yy73.maxPointsPerSecond     = (yymsp[-8].minor.yy0.n>0)?atoi(yymsp[-8].minor.yy0.z):-1;
+    yylhsminor.yy73.maxStorage = (yymsp[-6].minor.yy0.n>0)?strtoll(yymsp[-6].minor.yy0.z, NULL, 10):-1;
+    yylhsminor.yy73.maxQueryTime   = (yymsp[-4].minor.yy0.n>0)?strtoll(yymsp[-4].minor.yy0.z, NULL, 10):-1;
+    yylhsminor.yy73.maxConnections   = (yymsp[-1].minor.yy0.n>0)?atoi(yymsp[-1].minor.yy0.z):-1;
+    yylhsminor.yy73.stat    = yymsp[0].minor.yy0;
 }
-  yymsp[-8].minor.yy219 = yylhsminor.yy219;
+  yymsp[-8].minor.yy73 = yylhsminor.yy73;
         break;
       case 70: /* keep ::= KEEP tagitemlist */
-{ yymsp[-1].minor.yy322 = yymsp[0].minor.yy322; }
+{ yymsp[-1].minor.yy494 = yymsp[0].minor.yy494; }
         break;
       case 71: /* tables ::= MAXTABLES INTEGER */
       case 72: /* cache ::= CACHE INTEGER */ yytestcase(yyruleno==72);
@@ -2197,496 +2207,505 @@ static void yy_reduce(
       case 77: /* blocks ::= BLOCKS INTEGER */ yytestcase(yyruleno==77);
       case 78: /* ctime ::= CTIME INTEGER */ yytestcase(yyruleno==78);
       case 79: /* wal ::= WAL INTEGER */ yytestcase(yyruleno==79);
-      case 80: /* comp ::= COMP INTEGER */ yytestcase(yyruleno==80);
-      case 81: /* prec ::= PRECISION STRING */ yytestcase(yyruleno==81);
+      case 80: /* fsync ::= FSYNC INTEGER */ yytestcase(yyruleno==80);
+      case 81: /* comp ::= COMP INTEGER */ yytestcase(yyruleno==81);
+      case 82: /* prec ::= PRECISION STRING */ yytestcase(yyruleno==82);
 { yymsp[-1].minor.yy0 = yymsp[0].minor.yy0; }
         break;
-      case 82: /* db_optr ::= */
-{setDefaultCreateDbOption(&yymsp[1].minor.yy374);}
+      case 83: /* db_optr ::= */
+{setDefaultCreateDbOption(&yymsp[1].minor.yy158);}
         break;
-      case 83: /* db_optr ::= db_optr tables */
-      case 97: /* alter_db_optr ::= alter_db_optr tables */ yytestcase(yyruleno==97);
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.maxTablesPerVnode = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 84: /* db_optr ::= db_optr tables */
+      case 99: /* alter_db_optr ::= alter_db_optr tables */ yytestcase(yyruleno==99);
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.maxTablesPerVnode = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 84: /* db_optr ::= db_optr cache */
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.cacheBlockSize = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 85: /* db_optr ::= db_optr cache */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.cacheBlockSize = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 85: /* db_optr ::= db_optr replica */
-      case 96: /* alter_db_optr ::= alter_db_optr replica */ yytestcase(yyruleno==96);
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.replica = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 86: /* db_optr ::= db_optr replica */
+      case 98: /* alter_db_optr ::= alter_db_optr replica */ yytestcase(yyruleno==98);
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.replica = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 86: /* db_optr ::= db_optr days */
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.daysPerFile = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 87: /* db_optr ::= db_optr days */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.daysPerFile = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 87: /* db_optr ::= db_optr minrows */
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.minRowsPerBlock = strtod(yymsp[0].minor.yy0.z, NULL); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 88: /* db_optr ::= db_optr minrows */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.minRowsPerBlock = strtod(yymsp[0].minor.yy0.z, NULL); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 88: /* db_optr ::= db_optr maxrows */
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.maxRowsPerBlock = strtod(yymsp[0].minor.yy0.z, NULL); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 89: /* db_optr ::= db_optr maxrows */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.maxRowsPerBlock = strtod(yymsp[0].minor.yy0.z, NULL); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 89: /* db_optr ::= db_optr blocks */
-      case 99: /* alter_db_optr ::= alter_db_optr blocks */ yytestcase(yyruleno==99);
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.numOfBlocks = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 90: /* db_optr ::= db_optr blocks */
+      case 101: /* alter_db_optr ::= alter_db_optr blocks */ yytestcase(yyruleno==101);
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.numOfBlocks = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 90: /* db_optr ::= db_optr ctime */
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.commitTime = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 91: /* db_optr ::= db_optr ctime */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.commitTime = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 91: /* db_optr ::= db_optr wal */
-      case 101: /* alter_db_optr ::= alter_db_optr wal */ yytestcase(yyruleno==101);
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.walLevel = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 92: /* db_optr ::= db_optr wal */
+      case 103: /* alter_db_optr ::= alter_db_optr wal */ yytestcase(yyruleno==103);
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.walLevel = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 92: /* db_optr ::= db_optr comp */
-      case 100: /* alter_db_optr ::= alter_db_optr comp */ yytestcase(yyruleno==100);
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.compressionLevel = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 93: /* db_optr ::= db_optr fsync */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.fsyncPeriod = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 93: /* db_optr ::= db_optr prec */
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.precision = yymsp[0].minor.yy0; }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 94: /* db_optr ::= db_optr comp */
+      case 102: /* alter_db_optr ::= alter_db_optr comp */ yytestcase(yyruleno==102);
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.compressionLevel = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 94: /* db_optr ::= db_optr keep */
-      case 98: /* alter_db_optr ::= alter_db_optr keep */ yytestcase(yyruleno==98);
-{ yylhsminor.yy374 = yymsp[-1].minor.yy374; yylhsminor.yy374.keep = yymsp[0].minor.yy322; }
-  yymsp[-1].minor.yy374 = yylhsminor.yy374;
+      case 95: /* db_optr ::= db_optr prec */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.precision = yymsp[0].minor.yy0; }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 95: /* alter_db_optr ::= */
-{ setDefaultCreateDbOption(&yymsp[1].minor.yy374);}
+      case 96: /* db_optr ::= db_optr keep */
+      case 100: /* alter_db_optr ::= alter_db_optr keep */ yytestcase(yyruleno==100);
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.keep = yymsp[0].minor.yy494; }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
         break;
-      case 102: /* typename ::= ids */
+      case 97: /* alter_db_optr ::= */
+{ setDefaultCreateDbOption(&yymsp[1].minor.yy158);}
+        break;
+      case 104: /* alter_db_optr ::= alter_db_optr fsync */
+{ yylhsminor.yy158 = yymsp[-1].minor.yy158; yylhsminor.yy158.fsyncPeriod = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[-1].minor.yy158 = yylhsminor.yy158;
+        break;
+      case 105: /* typename ::= ids */
 { 
   yymsp[0].minor.yy0.type = 0;
-  tSQLSetColumnType (&yylhsminor.yy325, &yymsp[0].minor.yy0); 
+  tSQLSetColumnType (&yylhsminor.yy181, &yymsp[0].minor.yy0); 
 }
-  yymsp[0].minor.yy325 = yylhsminor.yy325;
+  yymsp[0].minor.yy181 = yylhsminor.yy181;
         break;
-      case 103: /* typename ::= ids LP signed RP */
+      case 106: /* typename ::= ids LP signed RP */
 {
-    if (yymsp[-1].minor.yy279 <= 0) {
+    if (yymsp[-1].minor.yy271 <= 0) {
       yymsp[-3].minor.yy0.type = 0;
-      tSQLSetColumnType(&yylhsminor.yy325, &yymsp[-3].minor.yy0);
+      tSQLSetColumnType(&yylhsminor.yy181, &yymsp[-3].minor.yy0);
     } else {
-      yymsp[-3].minor.yy0.type = -yymsp[-1].minor.yy279;          // negative value of name length
-      tSQLSetColumnType(&yylhsminor.yy325, &yymsp[-3].minor.yy0);
+      yymsp[-3].minor.yy0.type = -yymsp[-1].minor.yy271;          // negative value of name length
+      tSQLSetColumnType(&yylhsminor.yy181, &yymsp[-3].minor.yy0);
     }
 }
-  yymsp[-3].minor.yy325 = yylhsminor.yy325;
+  yymsp[-3].minor.yy181 = yylhsminor.yy181;
         break;
-      case 104: /* signed ::= INTEGER */
-{ yylhsminor.yy279 = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
-  yymsp[0].minor.yy279 = yylhsminor.yy279;
+      case 107: /* signed ::= INTEGER */
+{ yylhsminor.yy271 = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+  yymsp[0].minor.yy271 = yylhsminor.yy271;
         break;
-      case 105: /* signed ::= PLUS INTEGER */
-{ yymsp[-1].minor.yy279 = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
+      case 108: /* signed ::= PLUS INTEGER */
+{ yymsp[-1].minor.yy271 = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
         break;
-      case 106: /* signed ::= MINUS INTEGER */
-{ yymsp[-1].minor.yy279 = -strtol(yymsp[0].minor.yy0.z, NULL, 10);}
+      case 109: /* signed ::= MINUS INTEGER */
+{ yymsp[-1].minor.yy271 = -strtol(yymsp[0].minor.yy0.z, NULL, 10);}
         break;
-      case 107: /* cmd ::= CREATE TABLE ifnotexists ids cpxName create_table_args */
+      case 110: /* cmd ::= CREATE TABLE ifnotexists ids cpxName create_table_args */
 {
     yymsp[-2].minor.yy0.n += yymsp[-1].minor.yy0.n;
     setCreatedTableName(pInfo, &yymsp[-2].minor.yy0, &yymsp[-3].minor.yy0);
 }
         break;
-      case 108: /* create_table_args ::= LP columnlist RP */
+      case 111: /* create_table_args ::= LP columnlist RP */
 {
-    yymsp[-2].minor.yy408 = tSetCreateSQLElems(yymsp[-1].minor.yy369, NULL, NULL, NULL, NULL, TSQL_CREATE_TABLE);
-    setSQLInfo(pInfo, yymsp[-2].minor.yy408, NULL, TSDB_SQL_CREATE_TABLE);
+    yymsp[-2].minor.yy374 = tSetCreateSQLElems(yymsp[-1].minor.yy449, NULL, NULL, NULL, NULL, TSQL_CREATE_TABLE);
+    setSQLInfo(pInfo, yymsp[-2].minor.yy374, NULL, TSDB_SQL_CREATE_TABLE);
 }
         break;
-      case 109: /* create_table_args ::= LP columnlist RP TAGS LP columnlist RP */
+      case 112: /* create_table_args ::= LP columnlist RP TAGS LP columnlist RP */
 {
-    yymsp[-6].minor.yy408 = tSetCreateSQLElems(yymsp[-5].minor.yy369, yymsp[-1].minor.yy369, NULL, NULL, NULL, TSQL_CREATE_STABLE);
-    setSQLInfo(pInfo, yymsp[-6].minor.yy408, NULL, TSDB_SQL_CREATE_TABLE);
+    yymsp[-6].minor.yy374 = tSetCreateSQLElems(yymsp[-5].minor.yy449, yymsp[-1].minor.yy449, NULL, NULL, NULL, TSQL_CREATE_STABLE);
+    setSQLInfo(pInfo, yymsp[-6].minor.yy374, NULL, TSDB_SQL_CREATE_TABLE);
 }
         break;
-      case 110: /* create_table_args ::= USING ids cpxName TAGS LP tagitemlist RP */
+      case 113: /* create_table_args ::= USING ids cpxName TAGS LP tagitemlist RP */
 {
     yymsp[-5].minor.yy0.n += yymsp[-4].minor.yy0.n;
-    yymsp[-6].minor.yy408 = tSetCreateSQLElems(NULL, NULL, &yymsp[-5].minor.yy0, yymsp[-1].minor.yy322, NULL, TSQL_CREATE_TABLE_FROM_STABLE);
-    setSQLInfo(pInfo, yymsp[-6].minor.yy408, NULL, TSDB_SQL_CREATE_TABLE);
+    yymsp[-6].minor.yy374 = tSetCreateSQLElems(NULL, NULL, &yymsp[-5].minor.yy0, yymsp[-1].minor.yy494, NULL, TSQL_CREATE_TABLE_FROM_STABLE);
+    setSQLInfo(pInfo, yymsp[-6].minor.yy374, NULL, TSDB_SQL_CREATE_TABLE);
 }
         break;
-      case 111: /* create_table_args ::= AS select */
+      case 114: /* create_table_args ::= AS select */
 {
-    yymsp[-1].minor.yy408 = tSetCreateSQLElems(NULL, NULL, NULL, NULL, yymsp[0].minor.yy190, TSQL_CREATE_STREAM);
-    setSQLInfo(pInfo, yymsp[-1].minor.yy408, NULL, TSDB_SQL_CREATE_TABLE);
+    yymsp[-1].minor.yy374 = tSetCreateSQLElems(NULL, NULL, NULL, NULL, yymsp[0].minor.yy150, TSQL_CREATE_STREAM);
+    setSQLInfo(pInfo, yymsp[-1].minor.yy374, NULL, TSDB_SQL_CREATE_TABLE);
 }
         break;
-      case 112: /* columnlist ::= columnlist COMMA column */
-{yylhsminor.yy369 = tFieldListAppend(yymsp[-2].minor.yy369, &yymsp[0].minor.yy325);   }
-  yymsp[-2].minor.yy369 = yylhsminor.yy369;
+      case 115: /* columnlist ::= columnlist COMMA column */
+{yylhsminor.yy449 = tFieldListAppend(yymsp[-2].minor.yy449, &yymsp[0].minor.yy181);   }
+  yymsp[-2].minor.yy449 = yylhsminor.yy449;
         break;
-      case 113: /* columnlist ::= column */
-{yylhsminor.yy369 = tFieldListAppend(NULL, &yymsp[0].minor.yy325);}
-  yymsp[0].minor.yy369 = yylhsminor.yy369;
+      case 116: /* columnlist ::= column */
+{yylhsminor.yy449 = tFieldListAppend(NULL, &yymsp[0].minor.yy181);}
+  yymsp[0].minor.yy449 = yylhsminor.yy449;
         break;
-      case 114: /* column ::= ids typename */
+      case 117: /* column ::= ids typename */
 {
-    tSQLSetColumnInfo(&yylhsminor.yy325, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy325);
+    tSQLSetColumnInfo(&yylhsminor.yy181, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy181);
 }
-  yymsp[-1].minor.yy325 = yylhsminor.yy325;
+  yymsp[-1].minor.yy181 = yylhsminor.yy181;
         break;
-      case 115: /* tagitemlist ::= tagitemlist COMMA tagitem */
-{ yylhsminor.yy322 = tVariantListAppend(yymsp[-2].minor.yy322, &yymsp[0].minor.yy518, -1);    }
-  yymsp[-2].minor.yy322 = yylhsminor.yy322;
+      case 118: /* tagitemlist ::= tagitemlist COMMA tagitem */
+{ yylhsminor.yy494 = tVariantListAppend(yymsp[-2].minor.yy494, &yymsp[0].minor.yy312, -1);    }
+  yymsp[-2].minor.yy494 = yylhsminor.yy494;
         break;
-      case 116: /* tagitemlist ::= tagitem */
-{ yylhsminor.yy322 = tVariantListAppend(NULL, &yymsp[0].minor.yy518, -1); }
-  yymsp[0].minor.yy322 = yylhsminor.yy322;
+      case 119: /* tagitemlist ::= tagitem */
+{ yylhsminor.yy494 = tVariantListAppend(NULL, &yymsp[0].minor.yy312, -1); }
+  yymsp[0].minor.yy494 = yylhsminor.yy494;
         break;
-      case 117: /* tagitem ::= INTEGER */
-      case 118: /* tagitem ::= FLOAT */ yytestcase(yyruleno==118);
-      case 119: /* tagitem ::= STRING */ yytestcase(yyruleno==119);
-      case 120: /* tagitem ::= BOOL */ yytestcase(yyruleno==120);
-{toTSDBType(yymsp[0].minor.yy0.type); tVariantCreate(&yylhsminor.yy518, &yymsp[0].minor.yy0); }
-  yymsp[0].minor.yy518 = yylhsminor.yy518;
+      case 120: /* tagitem ::= INTEGER */
+      case 121: /* tagitem ::= FLOAT */ yytestcase(yyruleno==121);
+      case 122: /* tagitem ::= STRING */ yytestcase(yyruleno==122);
+      case 123: /* tagitem ::= BOOL */ yytestcase(yyruleno==123);
+{toTSDBType(yymsp[0].minor.yy0.type); tVariantCreate(&yylhsminor.yy312, &yymsp[0].minor.yy0); }
+  yymsp[0].minor.yy312 = yylhsminor.yy312;
         break;
-      case 121: /* tagitem ::= NULL */
-{ yymsp[0].minor.yy0.type = 0; tVariantCreate(&yylhsminor.yy518, &yymsp[0].minor.yy0); }
-  yymsp[0].minor.yy518 = yylhsminor.yy518;
+      case 124: /* tagitem ::= NULL */
+{ yymsp[0].minor.yy0.type = 0; tVariantCreate(&yylhsminor.yy312, &yymsp[0].minor.yy0); }
+  yymsp[0].minor.yy312 = yylhsminor.yy312;
         break;
-      case 122: /* tagitem ::= MINUS INTEGER */
-      case 123: /* tagitem ::= MINUS FLOAT */ yytestcase(yyruleno==123);
-      case 124: /* tagitem ::= PLUS INTEGER */ yytestcase(yyruleno==124);
-      case 125: /* tagitem ::= PLUS FLOAT */ yytestcase(yyruleno==125);
+      case 125: /* tagitem ::= MINUS INTEGER */
+      case 126: /* tagitem ::= MINUS FLOAT */ yytestcase(yyruleno==126);
+      case 127: /* tagitem ::= PLUS INTEGER */ yytestcase(yyruleno==127);
+      case 128: /* tagitem ::= PLUS FLOAT */ yytestcase(yyruleno==128);
 {
     yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n;
     yymsp[-1].minor.yy0.type = yymsp[0].minor.yy0.type;
     toTSDBType(yymsp[-1].minor.yy0.type);
-    tVariantCreate(&yylhsminor.yy518, &yymsp[-1].minor.yy0);
+    tVariantCreate(&yylhsminor.yy312, &yymsp[-1].minor.yy0);
 }
-  yymsp[-1].minor.yy518 = yylhsminor.yy518;
+  yymsp[-1].minor.yy312 = yylhsminor.yy312;
         break;
-      case 126: /* select ::= SELECT selcollist from where_opt interval_opt fill_opt sliding_opt groupby_opt orderby_opt having_opt slimit_opt limit_opt */
+      case 129: /* select ::= SELECT selcollist from where_opt interval_opt fill_opt sliding_opt groupby_opt orderby_opt having_opt slimit_opt limit_opt */
 {
-  yylhsminor.yy190 = tSetQuerySQLElems(&yymsp[-11].minor.yy0, yymsp[-10].minor.yy260, yymsp[-9].minor.yy322, yymsp[-8].minor.yy500, yymsp[-4].minor.yy322, yymsp[-3].minor.yy322, &yymsp[-7].minor.yy0, &yymsp[-5].minor.yy0, yymsp[-6].minor.yy322, &yymsp[0].minor.yy284, &yymsp[-1].minor.yy284);
+  yylhsminor.yy150 = tSetQuerySQLElems(&yymsp[-11].minor.yy0, yymsp[-10].minor.yy224, yymsp[-9].minor.yy494, yymsp[-8].minor.yy66, yymsp[-4].minor.yy494, yymsp[-3].minor.yy494, &yymsp[-7].minor.yy0, &yymsp[-5].minor.yy0, yymsp[-6].minor.yy494, &yymsp[0].minor.yy188, &yymsp[-1].minor.yy188);
 }
-  yymsp[-11].minor.yy190 = yylhsminor.yy190;
+  yymsp[-11].minor.yy150 = yylhsminor.yy150;
         break;
-      case 127: /* union ::= select */
-{ yylhsminor.yy263 = setSubclause(NULL, yymsp[0].minor.yy190); }
-  yymsp[0].minor.yy263 = yylhsminor.yy263;
+      case 130: /* union ::= select */
+{ yylhsminor.yy25 = setSubclause(NULL, yymsp[0].minor.yy150); }
+  yymsp[0].minor.yy25 = yylhsminor.yy25;
         break;
-      case 128: /* union ::= LP union RP */
-{ yymsp[-2].minor.yy263 = yymsp[-1].minor.yy263; }
+      case 131: /* union ::= LP union RP */
+{ yymsp[-2].minor.yy25 = yymsp[-1].minor.yy25; }
         break;
-      case 129: /* union ::= union UNION ALL select */
-{ yylhsminor.yy263 = appendSelectClause(yymsp[-3].minor.yy263, yymsp[0].minor.yy190); }
-  yymsp[-3].minor.yy263 = yylhsminor.yy263;
+      case 132: /* union ::= union UNION ALL select */
+{ yylhsminor.yy25 = appendSelectClause(yymsp[-3].minor.yy25, yymsp[0].minor.yy150); }
+  yymsp[-3].minor.yy25 = yylhsminor.yy25;
         break;
-      case 130: /* union ::= union UNION ALL LP select RP */
-{ yylhsminor.yy263 = appendSelectClause(yymsp[-5].minor.yy263, yymsp[-1].minor.yy190); }
-  yymsp[-5].minor.yy263 = yylhsminor.yy263;
+      case 133: /* union ::= union UNION ALL LP select RP */
+{ yylhsminor.yy25 = appendSelectClause(yymsp[-5].minor.yy25, yymsp[-1].minor.yy150); }
+  yymsp[-5].minor.yy25 = yylhsminor.yy25;
         break;
-      case 131: /* cmd ::= union */
-{ setSQLInfo(pInfo, yymsp[0].minor.yy263, NULL, TSDB_SQL_SELECT); }
+      case 134: /* cmd ::= union */
+{ setSQLInfo(pInfo, yymsp[0].minor.yy25, NULL, TSDB_SQL_SELECT); }
         break;
-      case 132: /* select ::= SELECT selcollist */
+      case 135: /* select ::= SELECT selcollist */
 {
-  yylhsminor.yy190 = tSetQuerySQLElems(&yymsp[-1].minor.yy0, yymsp[0].minor.yy260, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
+  yylhsminor.yy150 = tSetQuerySQLElems(&yymsp[-1].minor.yy0, yymsp[0].minor.yy224, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
 }
-  yymsp[-1].minor.yy190 = yylhsminor.yy190;
+  yymsp[-1].minor.yy150 = yylhsminor.yy150;
         break;
-      case 133: /* sclp ::= selcollist COMMA */
-{yylhsminor.yy260 = yymsp[-1].minor.yy260;}
-  yymsp[-1].minor.yy260 = yylhsminor.yy260;
+      case 136: /* sclp ::= selcollist COMMA */
+{yylhsminor.yy224 = yymsp[-1].minor.yy224;}
+  yymsp[-1].minor.yy224 = yylhsminor.yy224;
         break;
-      case 134: /* sclp ::= */
-{yymsp[1].minor.yy260 = 0;}
+      case 137: /* sclp ::= */
+{yymsp[1].minor.yy224 = 0;}
         break;
-      case 135: /* selcollist ::= sclp expr as */
+      case 138: /* selcollist ::= sclp expr as */
 {
-   yylhsminor.yy260 = tSQLExprListAppend(yymsp[-2].minor.yy260, yymsp[-1].minor.yy500, yymsp[0].minor.yy0.n?&yymsp[0].minor.yy0:0);
+   yylhsminor.yy224 = tSQLExprListAppend(yymsp[-2].minor.yy224, yymsp[-1].minor.yy66, yymsp[0].minor.yy0.n?&yymsp[0].minor.yy0:0);
 }
-  yymsp[-2].minor.yy260 = yylhsminor.yy260;
+  yymsp[-2].minor.yy224 = yylhsminor.yy224;
         break;
-      case 136: /* selcollist ::= sclp STAR */
+      case 139: /* selcollist ::= sclp STAR */
 {
    tSQLExpr *pNode = tSQLExprIdValueCreate(NULL, TK_ALL);
-   yylhsminor.yy260 = tSQLExprListAppend(yymsp[-1].minor.yy260, pNode, 0);
+   yylhsminor.yy224 = tSQLExprListAppend(yymsp[-1].minor.yy224, pNode, 0);
 }
-  yymsp[-1].minor.yy260 = yylhsminor.yy260;
+  yymsp[-1].minor.yy224 = yylhsminor.yy224;
         break;
-      case 137: /* as ::= AS ids */
+      case 140: /* as ::= AS ids */
 { yymsp[-1].minor.yy0 = yymsp[0].minor.yy0;    }
         break;
-      case 138: /* as ::= ids */
+      case 141: /* as ::= ids */
 { yylhsminor.yy0 = yymsp[0].minor.yy0;    }
   yymsp[0].minor.yy0 = yylhsminor.yy0;
         break;
-      case 139: /* as ::= */
+      case 142: /* as ::= */
 { yymsp[1].minor.yy0.n = 0;  }
         break;
-      case 140: /* from ::= FROM tablelist */
-{yymsp[-1].minor.yy322 = yymsp[0].minor.yy322;}
+      case 143: /* from ::= FROM tablelist */
+{yymsp[-1].minor.yy494 = yymsp[0].minor.yy494;}
         break;
-      case 141: /* tablelist ::= ids cpxName */
-{ toTSDBType(yymsp[-1].minor.yy0.type); yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yylhsminor.yy322 = tVariantListAppendToken(NULL, &yymsp[-1].minor.yy0, -1);}
-  yymsp[-1].minor.yy322 = yylhsminor.yy322;
+      case 144: /* tablelist ::= ids cpxName */
+{ toTSDBType(yymsp[-1].minor.yy0.type); yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yylhsminor.yy494 = tVariantListAppendToken(NULL, &yymsp[-1].minor.yy0, -1);}
+  yymsp[-1].minor.yy494 = yylhsminor.yy494;
         break;
-      case 142: /* tablelist ::= tablelist COMMA ids cpxName */
-{ toTSDBType(yymsp[-1].minor.yy0.type); yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yylhsminor.yy322 = tVariantListAppendToken(yymsp[-3].minor.yy322, &yymsp[-1].minor.yy0, -1);   }
-  yymsp[-3].minor.yy322 = yylhsminor.yy322;
+      case 145: /* tablelist ::= tablelist COMMA ids cpxName */
+{ toTSDBType(yymsp[-1].minor.yy0.type); yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yylhsminor.yy494 = tVariantListAppendToken(yymsp[-3].minor.yy494, &yymsp[-1].minor.yy0, -1);   }
+  yymsp[-3].minor.yy494 = yylhsminor.yy494;
         break;
-      case 143: /* tmvar ::= VARIABLE */
+      case 146: /* tmvar ::= VARIABLE */
 {yylhsminor.yy0 = yymsp[0].minor.yy0;}
   yymsp[0].minor.yy0 = yylhsminor.yy0;
         break;
-      case 144: /* interval_opt ::= INTERVAL LP tmvar RP */
-      case 149: /* sliding_opt ::= SLIDING LP tmvar RP */ yytestcase(yyruleno==149);
+      case 147: /* interval_opt ::= INTERVAL LP tmvar RP */
+      case 152: /* sliding_opt ::= SLIDING LP tmvar RP */ yytestcase(yyruleno==152);
 {yymsp[-3].minor.yy0 = yymsp[-1].minor.yy0;     }
         break;
-      case 145: /* interval_opt ::= */
-      case 150: /* sliding_opt ::= */ yytestcase(yyruleno==150);
+      case 148: /* interval_opt ::= */
+      case 153: /* sliding_opt ::= */ yytestcase(yyruleno==153);
 {yymsp[1].minor.yy0.n = 0; yymsp[1].minor.yy0.z = NULL; yymsp[1].minor.yy0.type = 0;   }
         break;
-      case 146: /* fill_opt ::= */
-{yymsp[1].minor.yy322 = 0;     }
+      case 149: /* fill_opt ::= */
+{yymsp[1].minor.yy494 = 0;     }
         break;
-      case 147: /* fill_opt ::= FILL LP ID COMMA tagitemlist RP */
+      case 150: /* fill_opt ::= FILL LP ID COMMA tagitemlist RP */
 {
     tVariant A = {0};
     toTSDBType(yymsp[-3].minor.yy0.type);
     tVariantCreate(&A, &yymsp[-3].minor.yy0);
 
-    tVariantListInsert(yymsp[-1].minor.yy322, &A, -1, 0);
-    yymsp[-5].minor.yy322 = yymsp[-1].minor.yy322;
+    tVariantListInsert(yymsp[-1].minor.yy494, &A, -1, 0);
+    yymsp[-5].minor.yy494 = yymsp[-1].minor.yy494;
 }
         break;
-      case 148: /* fill_opt ::= FILL LP ID RP */
+      case 151: /* fill_opt ::= FILL LP ID RP */
 {
     toTSDBType(yymsp[-1].minor.yy0.type);
-    yymsp[-3].minor.yy322 = tVariantListAppendToken(NULL, &yymsp[-1].minor.yy0, -1);
+    yymsp[-3].minor.yy494 = tVariantListAppendToken(NULL, &yymsp[-1].minor.yy0, -1);
 }
         break;
-      case 151: /* orderby_opt ::= */
-      case 159: /* groupby_opt ::= */ yytestcase(yyruleno==159);
-{yymsp[1].minor.yy322 = 0;}
+      case 154: /* orderby_opt ::= */
+      case 162: /* groupby_opt ::= */ yytestcase(yyruleno==162);
+{yymsp[1].minor.yy494 = 0;}
         break;
-      case 152: /* orderby_opt ::= ORDER BY sortlist */
-      case 160: /* groupby_opt ::= GROUP BY grouplist */ yytestcase(yyruleno==160);
-{yymsp[-2].minor.yy322 = yymsp[0].minor.yy322;}
+      case 155: /* orderby_opt ::= ORDER BY sortlist */
+      case 163: /* groupby_opt ::= GROUP BY grouplist */ yytestcase(yyruleno==163);
+{yymsp[-2].minor.yy494 = yymsp[0].minor.yy494;}
         break;
-      case 153: /* sortlist ::= sortlist COMMA item sortorder */
+      case 156: /* sortlist ::= sortlist COMMA item sortorder */
 {
-    yylhsminor.yy322 = tVariantListAppend(yymsp[-3].minor.yy322, &yymsp[-1].minor.yy518, yymsp[0].minor.yy150);
+    yylhsminor.yy494 = tVariantListAppend(yymsp[-3].minor.yy494, &yymsp[-1].minor.yy312, yymsp[0].minor.yy82);
 }
-  yymsp[-3].minor.yy322 = yylhsminor.yy322;
+  yymsp[-3].minor.yy494 = yylhsminor.yy494;
         break;
-      case 154: /* sortlist ::= item sortorder */
+      case 157: /* sortlist ::= item sortorder */
 {
-  yylhsminor.yy322 = tVariantListAppend(NULL, &yymsp[-1].minor.yy518, yymsp[0].minor.yy150);
+  yylhsminor.yy494 = tVariantListAppend(NULL, &yymsp[-1].minor.yy312, yymsp[0].minor.yy82);
 }
-  yymsp[-1].minor.yy322 = yylhsminor.yy322;
+  yymsp[-1].minor.yy494 = yylhsminor.yy494;
         break;
-      case 155: /* item ::= ids cpxName */
+      case 158: /* item ::= ids cpxName */
 {
   toTSDBType(yymsp[-1].minor.yy0.type);
   yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n;
 
-  tVariantCreate(&yylhsminor.yy518, &yymsp[-1].minor.yy0);
+  tVariantCreate(&yylhsminor.yy312, &yymsp[-1].minor.yy0);
 }
-  yymsp[-1].minor.yy518 = yylhsminor.yy518;
+  yymsp[-1].minor.yy312 = yylhsminor.yy312;
         break;
-      case 156: /* sortorder ::= ASC */
-{yymsp[0].minor.yy150 = TSDB_ORDER_ASC; }
+      case 159: /* sortorder ::= ASC */
+{yymsp[0].minor.yy82 = TSDB_ORDER_ASC; }
         break;
-      case 157: /* sortorder ::= DESC */
-{yymsp[0].minor.yy150 = TSDB_ORDER_DESC;}
+      case 160: /* sortorder ::= DESC */
+{yymsp[0].minor.yy82 = TSDB_ORDER_DESC;}
         break;
-      case 158: /* sortorder ::= */
-{yymsp[1].minor.yy150 = TSDB_ORDER_ASC;}
+      case 161: /* sortorder ::= */
+{yymsp[1].minor.yy82 = TSDB_ORDER_ASC;}
         break;
-      case 161: /* grouplist ::= grouplist COMMA item */
+      case 164: /* grouplist ::= grouplist COMMA item */
 {
-  yylhsminor.yy322 = tVariantListAppend(yymsp[-2].minor.yy322, &yymsp[0].minor.yy518, -1);
+  yylhsminor.yy494 = tVariantListAppend(yymsp[-2].minor.yy494, &yymsp[0].minor.yy312, -1);
 }
-  yymsp[-2].minor.yy322 = yylhsminor.yy322;
+  yymsp[-2].minor.yy494 = yylhsminor.yy494;
         break;
-      case 162: /* grouplist ::= item */
+      case 165: /* grouplist ::= item */
 {
-  yylhsminor.yy322 = tVariantListAppend(NULL, &yymsp[0].minor.yy518, -1);
+  yylhsminor.yy494 = tVariantListAppend(NULL, &yymsp[0].minor.yy312, -1);
 }
-  yymsp[0].minor.yy322 = yylhsminor.yy322;
+  yymsp[0].minor.yy494 = yylhsminor.yy494;
         break;
-      case 163: /* having_opt ::= */
-      case 173: /* where_opt ::= */ yytestcase(yyruleno==173);
-      case 209: /* expritem ::= */ yytestcase(yyruleno==209);
-{yymsp[1].minor.yy500 = 0;}
+      case 166: /* having_opt ::= */
+      case 176: /* where_opt ::= */ yytestcase(yyruleno==176);
+      case 212: /* expritem ::= */ yytestcase(yyruleno==212);
+{yymsp[1].minor.yy66 = 0;}
         break;
-      case 164: /* having_opt ::= HAVING expr */
-      case 174: /* where_opt ::= WHERE expr */ yytestcase(yyruleno==174);
-{yymsp[-1].minor.yy500 = yymsp[0].minor.yy500;}
+      case 167: /* having_opt ::= HAVING expr */
+      case 177: /* where_opt ::= WHERE expr */ yytestcase(yyruleno==177);
+{yymsp[-1].minor.yy66 = yymsp[0].minor.yy66;}
         break;
-      case 165: /* limit_opt ::= */
-      case 169: /* slimit_opt ::= */ yytestcase(yyruleno==169);
-{yymsp[1].minor.yy284.limit = -1; yymsp[1].minor.yy284.offset = 0;}
+      case 168: /* limit_opt ::= */
+      case 172: /* slimit_opt ::= */ yytestcase(yyruleno==172);
+{yymsp[1].minor.yy188.limit = -1; yymsp[1].minor.yy188.offset = 0;}
         break;
-      case 166: /* limit_opt ::= LIMIT signed */
-      case 170: /* slimit_opt ::= SLIMIT signed */ yytestcase(yyruleno==170);
-{yymsp[-1].minor.yy284.limit = yymsp[0].minor.yy279;  yymsp[-1].minor.yy284.offset = 0;}
+      case 169: /* limit_opt ::= LIMIT signed */
+      case 173: /* slimit_opt ::= SLIMIT signed */ yytestcase(yyruleno==173);
+{yymsp[-1].minor.yy188.limit = yymsp[0].minor.yy271;  yymsp[-1].minor.yy188.offset = 0;}
         break;
-      case 167: /* limit_opt ::= LIMIT signed OFFSET signed */
-      case 171: /* slimit_opt ::= SLIMIT signed SOFFSET signed */ yytestcase(yyruleno==171);
-{yymsp[-3].minor.yy284.limit = yymsp[-2].minor.yy279;  yymsp[-3].minor.yy284.offset = yymsp[0].minor.yy279;}
+      case 170: /* limit_opt ::= LIMIT signed OFFSET signed */
+      case 174: /* slimit_opt ::= SLIMIT signed SOFFSET signed */ yytestcase(yyruleno==174);
+{yymsp[-3].minor.yy188.limit = yymsp[-2].minor.yy271;  yymsp[-3].minor.yy188.offset = yymsp[0].minor.yy271;}
         break;
-      case 168: /* limit_opt ::= LIMIT signed COMMA signed */
-      case 172: /* slimit_opt ::= SLIMIT signed COMMA signed */ yytestcase(yyruleno==172);
-{yymsp[-3].minor.yy284.limit = yymsp[0].minor.yy279;  yymsp[-3].minor.yy284.offset = yymsp[-2].minor.yy279;}
+      case 171: /* limit_opt ::= LIMIT signed COMMA signed */
+      case 175: /* slimit_opt ::= SLIMIT signed COMMA signed */ yytestcase(yyruleno==175);
+{yymsp[-3].minor.yy188.limit = yymsp[0].minor.yy271;  yymsp[-3].minor.yy188.offset = yymsp[-2].minor.yy271;}
         break;
-      case 175: /* expr ::= LP expr RP */
-{yymsp[-2].minor.yy500 = yymsp[-1].minor.yy500; }
+      case 178: /* expr ::= LP expr RP */
+{yymsp[-2].minor.yy66 = yymsp[-1].minor.yy66; }
         break;
-      case 176: /* expr ::= ID */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_ID);}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 179: /* expr ::= ID */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_ID);}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 177: /* expr ::= ID DOT ID */
-{yymsp[-2].minor.yy0.n += (1+yymsp[0].minor.yy0.n); yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[-2].minor.yy0, TK_ID);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 180: /* expr ::= ID DOT ID */
+{yymsp[-2].minor.yy0.n += (1+yymsp[0].minor.yy0.n); yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[-2].minor.yy0, TK_ID);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 178: /* expr ::= ID DOT STAR */
-{yymsp[-2].minor.yy0.n += (1+yymsp[0].minor.yy0.n); yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[-2].minor.yy0, TK_ALL);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 181: /* expr ::= ID DOT STAR */
+{yymsp[-2].minor.yy0.n += (1+yymsp[0].minor.yy0.n); yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[-2].minor.yy0, TK_ALL);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 179: /* expr ::= INTEGER */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_INTEGER);}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 182: /* expr ::= INTEGER */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_INTEGER);}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 180: /* expr ::= MINUS INTEGER */
-      case 181: /* expr ::= PLUS INTEGER */ yytestcase(yyruleno==181);
-{yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yymsp[-1].minor.yy0.type = TK_INTEGER; yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[-1].minor.yy0, TK_INTEGER);}
-  yymsp[-1].minor.yy500 = yylhsminor.yy500;
+      case 183: /* expr ::= MINUS INTEGER */
+      case 184: /* expr ::= PLUS INTEGER */ yytestcase(yyruleno==184);
+{yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yymsp[-1].minor.yy0.type = TK_INTEGER; yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[-1].minor.yy0, TK_INTEGER);}
+  yymsp[-1].minor.yy66 = yylhsminor.yy66;
         break;
-      case 182: /* expr ::= FLOAT */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_FLOAT);}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 185: /* expr ::= FLOAT */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_FLOAT);}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 183: /* expr ::= MINUS FLOAT */
-      case 184: /* expr ::= PLUS FLOAT */ yytestcase(yyruleno==184);
-{yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yymsp[-1].minor.yy0.type = TK_FLOAT; yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[-1].minor.yy0, TK_FLOAT);}
-  yymsp[-1].minor.yy500 = yylhsminor.yy500;
+      case 186: /* expr ::= MINUS FLOAT */
+      case 187: /* expr ::= PLUS FLOAT */ yytestcase(yyruleno==187);
+{yymsp[-1].minor.yy0.n += yymsp[0].minor.yy0.n; yymsp[-1].minor.yy0.type = TK_FLOAT; yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[-1].minor.yy0, TK_FLOAT);}
+  yymsp[-1].minor.yy66 = yylhsminor.yy66;
         break;
-      case 185: /* expr ::= STRING */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_STRING);}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 188: /* expr ::= STRING */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_STRING);}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 186: /* expr ::= NOW */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_NOW); }
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 189: /* expr ::= NOW */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_NOW); }
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 187: /* expr ::= VARIABLE */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_VARIABLE);}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 190: /* expr ::= VARIABLE */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_VARIABLE);}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 188: /* expr ::= BOOL */
-{yylhsminor.yy500 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_BOOL);}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 191: /* expr ::= BOOL */
+{yylhsminor.yy66 = tSQLExprIdValueCreate(&yymsp[0].minor.yy0, TK_BOOL);}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 189: /* expr ::= ID LP exprlist RP */
+      case 192: /* expr ::= ID LP exprlist RP */
 {
-  yylhsminor.yy500 = tSQLExprCreateFunction(yymsp[-1].minor.yy260, &yymsp[-3].minor.yy0, &yymsp[0].minor.yy0, yymsp[-3].minor.yy0.type);
+  yylhsminor.yy66 = tSQLExprCreateFunction(yymsp[-1].minor.yy224, &yymsp[-3].minor.yy0, &yymsp[0].minor.yy0, yymsp[-3].minor.yy0.type);
 }
-  yymsp[-3].minor.yy500 = yylhsminor.yy500;
+  yymsp[-3].minor.yy66 = yylhsminor.yy66;
         break;
-      case 190: /* expr ::= ID LP STAR RP */
+      case 193: /* expr ::= ID LP STAR RP */
 {
-  yylhsminor.yy500 = tSQLExprCreateFunction(NULL, &yymsp[-3].minor.yy0, &yymsp[0].minor.yy0, yymsp[-3].minor.yy0.type);
+  yylhsminor.yy66 = tSQLExprCreateFunction(NULL, &yymsp[-3].minor.yy0, &yymsp[0].minor.yy0, yymsp[-3].minor.yy0.type);
 }
-  yymsp[-3].minor.yy500 = yylhsminor.yy500;
+  yymsp[-3].minor.yy66 = yylhsminor.yy66;
         break;
-      case 191: /* expr ::= expr AND expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_AND);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 194: /* expr ::= expr AND expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_AND);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 192: /* expr ::= expr OR expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_OR); }
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 195: /* expr ::= expr OR expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_OR); }
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 193: /* expr ::= expr LT expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_LT);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 196: /* expr ::= expr LT expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_LT);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 194: /* expr ::= expr GT expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_GT);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 197: /* expr ::= expr GT expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_GT);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 195: /* expr ::= expr LE expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_LE);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 198: /* expr ::= expr LE expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_LE);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 196: /* expr ::= expr GE expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_GE);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 199: /* expr ::= expr GE expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_GE);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 197: /* expr ::= expr NE expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_NE);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 200: /* expr ::= expr NE expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_NE);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 198: /* expr ::= expr EQ expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_EQ);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 201: /* expr ::= expr EQ expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_EQ);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 199: /* expr ::= expr PLUS expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_PLUS);  }
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 202: /* expr ::= expr PLUS expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_PLUS);  }
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 200: /* expr ::= expr MINUS expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_MINUS); }
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 203: /* expr ::= expr MINUS expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_MINUS); }
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 201: /* expr ::= expr STAR expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_STAR);  }
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 204: /* expr ::= expr STAR expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_STAR);  }
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 202: /* expr ::= expr SLASH expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_DIVIDE);}
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 205: /* expr ::= expr SLASH expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_DIVIDE);}
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 203: /* expr ::= expr REM expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_REM);   }
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 206: /* expr ::= expr REM expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_REM);   }
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 204: /* expr ::= expr LIKE expr */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-2].minor.yy500, yymsp[0].minor.yy500, TK_LIKE);  }
-  yymsp[-2].minor.yy500 = yylhsminor.yy500;
+      case 207: /* expr ::= expr LIKE expr */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-2].minor.yy66, yymsp[0].minor.yy66, TK_LIKE);  }
+  yymsp[-2].minor.yy66 = yylhsminor.yy66;
         break;
-      case 205: /* expr ::= expr IN LP exprlist RP */
-{yylhsminor.yy500 = tSQLExprCreate(yymsp[-4].minor.yy500, (tSQLExpr*)yymsp[-1].minor.yy260, TK_IN); }
-  yymsp[-4].minor.yy500 = yylhsminor.yy500;
+      case 208: /* expr ::= expr IN LP exprlist RP */
+{yylhsminor.yy66 = tSQLExprCreate(yymsp[-4].minor.yy66, (tSQLExpr*)yymsp[-1].minor.yy224, TK_IN); }
+  yymsp[-4].minor.yy66 = yylhsminor.yy66;
         break;
-      case 206: /* exprlist ::= exprlist COMMA expritem */
-{yylhsminor.yy260 = tSQLExprListAppend(yymsp[-2].minor.yy260,yymsp[0].minor.yy500,0);}
-  yymsp[-2].minor.yy260 = yylhsminor.yy260;
+      case 209: /* exprlist ::= exprlist COMMA expritem */
+{yylhsminor.yy224 = tSQLExprListAppend(yymsp[-2].minor.yy224,yymsp[0].minor.yy66,0);}
+  yymsp[-2].minor.yy224 = yylhsminor.yy224;
         break;
-      case 207: /* exprlist ::= expritem */
-{yylhsminor.yy260 = tSQLExprListAppend(0,yymsp[0].minor.yy500,0);}
-  yymsp[0].minor.yy260 = yylhsminor.yy260;
+      case 210: /* exprlist ::= expritem */
+{yylhsminor.yy224 = tSQLExprListAppend(0,yymsp[0].minor.yy66,0);}
+  yymsp[0].minor.yy224 = yylhsminor.yy224;
         break;
-      case 208: /* expritem ::= expr */
-{yylhsminor.yy500 = yymsp[0].minor.yy500;}
-  yymsp[0].minor.yy500 = yylhsminor.yy500;
+      case 211: /* expritem ::= expr */
+{yylhsminor.yy66 = yymsp[0].minor.yy66;}
+  yymsp[0].minor.yy66 = yylhsminor.yy66;
         break;
-      case 210: /* cmd ::= RESET QUERY CACHE */
+      case 213: /* cmd ::= RESET QUERY CACHE */
 { setDCLSQLElems(pInfo, TSDB_SQL_RESET_CACHE, 0);}
         break;
-      case 211: /* cmd ::= ALTER TABLE ids cpxName ADD COLUMN columnlist */
+      case 214: /* cmd ::= ALTER TABLE ids cpxName ADD COLUMN columnlist */
 {
     yymsp[-4].minor.yy0.n += yymsp[-3].minor.yy0.n;
-    SAlterTableSQL* pAlterTable = tAlterTableSQLElems(&yymsp[-4].minor.yy0, yymsp[0].minor.yy369, NULL, TSDB_ALTER_TABLE_ADD_COLUMN);
+    SAlterTableSQL* pAlterTable = tAlterTableSQLElems(&yymsp[-4].minor.yy0, yymsp[0].minor.yy449, NULL, TSDB_ALTER_TABLE_ADD_COLUMN);
     setSQLInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
         break;
-      case 212: /* cmd ::= ALTER TABLE ids cpxName DROP COLUMN ids */
+      case 215: /* cmd ::= ALTER TABLE ids cpxName DROP COLUMN ids */
 {
     yymsp[-4].minor.yy0.n += yymsp[-3].minor.yy0.n;
 
@@ -2697,14 +2716,14 @@ static void yy_reduce(
     setSQLInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
         break;
-      case 213: /* cmd ::= ALTER TABLE ids cpxName ADD TAG columnlist */
+      case 216: /* cmd ::= ALTER TABLE ids cpxName ADD TAG columnlist */
 {
     yymsp[-4].minor.yy0.n += yymsp[-3].minor.yy0.n;
-    SAlterTableSQL* pAlterTable = tAlterTableSQLElems(&yymsp[-4].minor.yy0, yymsp[0].minor.yy369, NULL, TSDB_ALTER_TABLE_ADD_TAG_COLUMN);
+    SAlterTableSQL* pAlterTable = tAlterTableSQLElems(&yymsp[-4].minor.yy0, yymsp[0].minor.yy449, NULL, TSDB_ALTER_TABLE_ADD_TAG_COLUMN);
     setSQLInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
         break;
-      case 214: /* cmd ::= ALTER TABLE ids cpxName DROP TAG ids */
+      case 217: /* cmd ::= ALTER TABLE ids cpxName DROP TAG ids */
 {
     yymsp[-4].minor.yy0.n += yymsp[-3].minor.yy0.n;
 
@@ -2715,7 +2734,7 @@ static void yy_reduce(
     setSQLInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
         break;
-      case 215: /* cmd ::= ALTER TABLE ids cpxName CHANGE TAG ids ids */
+      case 218: /* cmd ::= ALTER TABLE ids cpxName CHANGE TAG ids ids */
 {
     yymsp[-5].minor.yy0.n += yymsp[-4].minor.yy0.n;
 
@@ -2729,25 +2748,25 @@ static void yy_reduce(
     setSQLInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
         break;
-      case 216: /* cmd ::= ALTER TABLE ids cpxName SET TAG ids EQ tagitem */
+      case 219: /* cmd ::= ALTER TABLE ids cpxName SET TAG ids EQ tagitem */
 {
     yymsp[-6].minor.yy0.n += yymsp[-5].minor.yy0.n;
 
     toTSDBType(yymsp[-2].minor.yy0.type);
     tVariantList* A = tVariantListAppendToken(NULL, &yymsp[-2].minor.yy0, -1);
-    A = tVariantListAppend(A, &yymsp[0].minor.yy518, -1);
+    A = tVariantListAppend(A, &yymsp[0].minor.yy312, -1);
 
     SAlterTableSQL* pAlterTable = tAlterTableSQLElems(&yymsp[-6].minor.yy0, NULL, A, TSDB_ALTER_TABLE_UPDATE_TAG_VAL);
     setSQLInfo(pInfo, pAlterTable, NULL, TSDB_SQL_ALTER_TABLE);
 }
         break;
-      case 217: /* cmd ::= KILL CONNECTION INTEGER */
+      case 220: /* cmd ::= KILL CONNECTION INTEGER */
 {setKillSQL(pInfo, TSDB_SQL_KILL_CONNECTION, &yymsp[0].minor.yy0);}
         break;
-      case 218: /* cmd ::= KILL STREAM INTEGER COLON INTEGER */
+      case 221: /* cmd ::= KILL STREAM INTEGER COLON INTEGER */
 {yymsp[-2].minor.yy0.n += (yymsp[-1].minor.yy0.n + yymsp[0].minor.yy0.n); setKillSQL(pInfo, TSDB_SQL_KILL_STREAM, &yymsp[-2].minor.yy0);}
         break;
-      case 219: /* cmd ::= KILL QUERY INTEGER COLON INTEGER */
+      case 222: /* cmd ::= KILL QUERY INTEGER COLON INTEGER */
 {yymsp[-2].minor.yy0.n += (yymsp[-1].minor.yy0.n + yymsp[0].minor.yy0.n); setKillSQL(pInfo, TSDB_SQL_KILL_QUERY, &yymsp[-2].minor.yy0);}
         break;
       default:
diff --git a/src/query/tests/tsBufTest.cpp b/src/query/tests/tsBufTest.cpp
index 1d2d94f3c0..f813261957 100644
--- a/src/query/tests/tsBufTest.cpp
+++ b/src/query/tests/tsBufTest.cpp
@@ -47,7 +47,7 @@ void simpleTest() {
   EXPECT_EQ(pTSBuf->tsData.len, 0);
   EXPECT_EQ(pTSBuf->block.numOfElem, num);
 
-  tsBufDestory(pTSBuf);
+  tsBufDestroy(pTSBuf);
 }
 
 // one large list of ts, the ts list need to be split into several small blocks
@@ -71,7 +71,7 @@ void largeTSTest() {
   EXPECT_EQ(pTSBuf->tsData.len, 0);
   EXPECT_EQ(pTSBuf->block.numOfElem, num);
 
-  tsBufDestory(pTSBuf);
+  tsBufDestroy(pTSBuf);
 }
 
 void multiTagsTest() {
@@ -101,7 +101,7 @@ void multiTagsTest() {
   EXPECT_EQ(pTSBuf->tsData.len, 0);
   EXPECT_EQ(pTSBuf->block.numOfElem, num);
 
-  tsBufDestory(pTSBuf);
+  tsBufDestroy(pTSBuf);
 }
 
 void multiVnodeTagsTest() {
@@ -139,7 +139,7 @@ void multiVnodeTagsTest() {
   EXPECT_EQ(pTSBuf->tsData.len, 0);
   EXPECT_EQ(pTSBuf->block.numOfElem, num);
 
-  tsBufDestory(pTSBuf);
+  tsBufDestroy(pTSBuf);
 }
 
 void loadDataTest() {
@@ -386,8 +386,8 @@ void mergeDiffVnodeBufferTest() {
 
   tsBufDisplay(pTSBuf1);
 
-  tsBufDestory(pTSBuf2);
-  tsBufDestory(pTSBuf1);
+  tsBufDestroy(pTSBuf2);
+  tsBufDestroy(pTSBuf1);
 }
 
 void mergeIdenticalVnodeBufferTest() {
@@ -432,8 +432,8 @@ void mergeIdenticalVnodeBufferTest() {
     printf("%d-%" PRIu64 "-%" PRIu64 "\n", elem.vnode, elem.tag, elem.ts);
   }
 
-  tsBufDestory(pTSBuf1);
-  tsBufDestory(pTSBuf2);
+  tsBufDestroy(pTSBuf1);
+  tsBufDestroy(pTSBuf2);
 }
 }  // namespace
 
diff --git a/src/rpc/inc/rpcLog.h b/src/rpc/inc/rpcLog.h
index f0f5c84ff9..10e8476691 100644
--- a/src/rpc/inc/rpcLog.h
+++ b/src/rpc/inc/rpcLog.h
@@ -27,10 +27,10 @@ extern int32_t tscEmbedded;
 
 #define tFatal(...) { if (rpcDebugFlag & DEBUG_FATAL) { taosPrintLog("RPC FATAL ", tscEmbedded ? 255 : rpcDebugFlag, __VA_ARGS__); }}
 #define tError(...) { if (rpcDebugFlag & DEBUG_ERROR) { taosPrintLog("RPC ERROR ", tscEmbedded ? 255 : rpcDebugFlag, __VA_ARGS__); }}
-#define tWarn(...)  { if (rpcDebugFlag & DEBUG_WARN)  { taosPrintLog("RPC WARN  ", tscEmbedded ? 255 : rpcDebugFlag, __VA_ARGS__); }}
-#define tInfo(...)  { if (rpcDebugFlag & DEBUG_INFO)  { taosPrintLog("RPC INFO  ", tscEmbedded ? 255 : rpcDebugFlag, __VA_ARGS__); }}
-#define tDebug(...) { if (rpcDebugFlag & DEBUG_DEBUG) { taosPrintLog("RPC DEBUG ", rpcDebugFlag, __VA_ARGS__); }}
-#define tTrace(...) { if (rpcDebugFlag & DEBUG_TRACE) { taosPrintLog("RPC TRACE ", rpcDebugFlag, __VA_ARGS__); }}
+#define tWarn(...)  { if (rpcDebugFlag & DEBUG_WARN)  { taosPrintLog("RPC WARN ", tscEmbedded ? 255 : rpcDebugFlag, __VA_ARGS__); }}
+#define tInfo(...)  { if (rpcDebugFlag & DEBUG_INFO)  { taosPrintLog("RPC ", tscEmbedded ? 255 : rpcDebugFlag, __VA_ARGS__); }}
+#define tDebug(...) { if (rpcDebugFlag & DEBUG_DEBUG) { taosPrintLog("RPC ", rpcDebugFlag, __VA_ARGS__); }}
+#define tTrace(...) { if (rpcDebugFlag & DEBUG_TRACE) { taosPrintLog("RPC ", rpcDebugFlag, __VA_ARGS__); }}
 #define tDump(x, y) { if (rpcDebugFlag & DEBUG_DUMP)  { taosDumpData((unsigned char *)x, y); }}
 
 #ifdef __cplusplus
diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 7d1a5a52de..40f2dac660 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -21,11 +21,10 @@
 #include "tkvstore.h"
 #include "tlist.h"
 #include "tlog.h"
-#include "tref.h"
+#include "tlockfree.h"
 #include "tsdb.h"
 #include "tskiplist.h"
 #include "tutil.h"
-#include "trwlatch.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -35,10 +34,10 @@ extern int tsdbDebugFlag;
 
 #define tsdbFatal(...) { if (tsdbDebugFlag & DEBUG_FATAL) { taosPrintLog("TDB FATAL ", 255, __VA_ARGS__); }}
 #define tsdbError(...) { if (tsdbDebugFlag & DEBUG_ERROR) { taosPrintLog("TDB ERROR ", 255, __VA_ARGS__); }}
-#define tsdbWarn(...)  { if (tsdbDebugFlag & DEBUG_WARN)  { taosPrintLog("TDB WARN  ", 255, __VA_ARGS__); }}
-#define tsdbInfo(...)  { if (tsdbDebugFlag & DEBUG_INFO)  { taosPrintLog("TDB INFO  ", 255, __VA_ARGS__); }}
-#define tsdbDebug(...) { if (tsdbDebugFlag & DEBUG_DEBUG) { taosPrintLog("TDB DEBUG ", tsdbDebugFlag, __VA_ARGS__); }}
-#define tsdbTrace(...) { if (tsdbDebugFlag & DEBUG_TRACE) { taosPrintLog("TDB TRACE ", tsdbDebugFlag, __VA_ARGS__); }}
+#define tsdbWarn(...)  { if (tsdbDebugFlag & DEBUG_WARN)  { taosPrintLog("TDB WARN ", 255, __VA_ARGS__); }}
+#define tsdbInfo(...)  { if (tsdbDebugFlag & DEBUG_INFO)  { taosPrintLog("TDB ", 255, __VA_ARGS__); }}
+#define tsdbDebug(...) { if (tsdbDebugFlag & DEBUG_DEBUG) { taosPrintLog("TDB ", tsdbDebugFlag, __VA_ARGS__); }}
+#define tsdbTrace(...) { if (tsdbDebugFlag & DEBUG_TRACE) { taosPrintLog("TDB ", tsdbDebugFlag, __VA_ARGS__); }}
 
 #define TSDB_MAX_TABLE_SCHEMAS 16
 #define TSDB_FILE_HEAD_SIZE 512
@@ -96,6 +95,11 @@ typedef struct {
 } STsdbBufPool;
 
 // ------------------ tsdbMemTable.c
+typedef struct {
+  STable *           pTable;
+  SSkipListIterator *pIter;
+} SCommitIter;
+
 typedef struct {
   uint64_t   uid;
   TSKEY      keyFirst;
@@ -206,10 +210,10 @@ typedef struct {
   int64_t offset : 63;
   int32_t algorithm : 8;
   int32_t numOfRows : 24;
-  int32_t sversion;
   int32_t len;
+  int32_t keyLen;     // key column length, keyOffset = offset+sizeof(SCompData)+sizeof(SCompCol)*numOfCols
   int16_t numOfSubBlocks;
-  int16_t numOfCols;
+  int16_t numOfCols; // not including timestamp column
   TSKEY   keyFirst;
   TSKEY   keyLast;
 } SCompBlock;
@@ -377,6 +381,24 @@ int   tsdbUnRefMemTable(STsdbRepo* pRepo, SMemTable* pMemTable);
 int   tsdbTakeMemSnapshot(STsdbRepo* pRepo, SMemTable** pMem, SMemTable** pIMem);
 void* tsdbAllocBytes(STsdbRepo* pRepo, int bytes);
 int   tsdbAsyncCommit(STsdbRepo* pRepo);
+int   tsdbLoadDataFromCache(STable* pTable, SSkipListIterator* pIter, TSKEY maxKey, int maxRowsToRead, SDataCols* pCols,
+                            TSKEY* filterKeys, int nFilterKeys);
+
+static FORCE_INLINE SDataRow tsdbNextIterRow(SSkipListIterator* pIter) {
+  if (pIter == NULL) return NULL;
+
+  SSkipListNode* node = tSkipListIterGet(pIter);
+  if (node == NULL) return NULL;
+
+  return SL_GET_NODE_DATA(node);
+}
+
+static FORCE_INLINE TSKEY tsdbNextIterKey(SSkipListIterator* pIter) {
+  SDataRow row = tsdbNextIterRow(pIter);
+  if (row == NULL) return -1;
+
+  return dataRowKey(row);
+}
 
 // ------------------ tsdbFile.c
 #define TSDB_KEY_FILEID(key, daysPerFile, precision) ((key) / tsMsPerDay[(precision)] / (daysPerFile))
@@ -421,25 +443,36 @@ void        tsdbRemoveFileGroup(STsdbRepo* pRepo, SFileGroup* pFGroup);
 #define helperType(h) (h)->type
 #define helperRepo(h) (h)->pRepo
 #define helperState(h) (h)->state
+#define TSDB_NLAST_FILE_OPENED(h) ((h)->files.nLastF.fd > 0)
 
-int   tsdbInitReadHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
-int   tsdbInitWriteHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
-void  tsdbDestroyHelper(SRWHelper* pHelper);
-void  tsdbResetHelper(SRWHelper* pHelper);
-int   tsdbSetAndOpenHelperFile(SRWHelper* pHelper, SFileGroup* pGroup);
-int   tsdbCloseHelperFile(SRWHelper* pHelper, bool hasError);
-void  tsdbSetHelperTable(SRWHelper* pHelper, STable* pTable, STsdbRepo* pRepo);
-int   tsdbWriteDataBlock(SRWHelper* pHelper, SDataCols* pDataCols);
-int   tsdbMoveLastBlockIfNeccessary(SRWHelper* pHelper);
-int   tsdbWriteCompInfo(SRWHelper* pHelper);
-int   tsdbWriteCompIdx(SRWHelper* pHelper);
-int   tsdbLoadCompIdx(SRWHelper* pHelper, void* target);
-int   tsdbLoadCompInfo(SRWHelper* pHelper, void* target);
-int   tsdbLoadCompData(SRWHelper* phelper, SCompBlock* pcompblock, void* target);
-void  tsdbGetDataStatis(SRWHelper* pHelper, SDataStatis* pStatis, int numOfCols);
-int   tsdbLoadBlockDataCols(SRWHelper* pHelper, SCompBlock* pCompBlock, SCompInfo* pCompInfo, int16_t* colIds,
-                            int numOfColIds);
-int   tsdbLoadBlockData(SRWHelper* pHelper, SCompBlock* pCompBlock, SCompInfo* pCompInfo);
+int  tsdbInitReadHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
+int  tsdbInitWriteHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
+void tsdbDestroyHelper(SRWHelper* pHelper);
+void tsdbResetHelper(SRWHelper* pHelper);
+int  tsdbSetAndOpenHelperFile(SRWHelper* pHelper, SFileGroup* pGroup);
+int  tsdbCloseHelperFile(SRWHelper* pHelper, bool hasError);
+void tsdbSetHelperTable(SRWHelper* pHelper, STable* pTable, STsdbRepo* pRepo);
+int  tsdbCommitTableData(SRWHelper* pHelper, SCommitIter* pCommitIter, SDataCols* pDataCols, TSKEY maxKey);
+int  tsdbMoveLastBlockIfNeccessary(SRWHelper* pHelper);
+int  tsdbWriteCompInfo(SRWHelper* pHelper);
+int  tsdbWriteCompIdx(SRWHelper* pHelper);
+int  tsdbLoadCompIdx(SRWHelper* pHelper, void* target);
+int  tsdbLoadCompInfo(SRWHelper* pHelper, void* target);
+int  tsdbLoadCompData(SRWHelper* phelper, SCompBlock* pcompblock, void* target);
+void tsdbGetDataStatis(SRWHelper* pHelper, SDataStatis* pStatis, int numOfCols);
+int  tsdbLoadBlockDataCols(SRWHelper* pHelper, SCompBlock* pCompBlock, SCompInfo* pCompInfo, int16_t* colIds,
+                           int numOfColIds);
+int  tsdbLoadBlockData(SRWHelper* pHelper, SCompBlock* pCompBlock, SCompInfo* pCompInfo);
+
+static FORCE_INLINE int compTSKEY(const void* key1, const void* key2) {
+  if (*(TSKEY*)key1 > *(TSKEY*)key2) {
+    return 1;
+  } else if (*(TSKEY*)key1 == *(TSKEY*)key2) {
+    return 0;
+  } else {
+    return -1;
+  }
+}
 
 // ------------------ tsdbMain.c
 #define REPO_ID(r) (r)->config.tsdbId
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 6b31600705..ffaab375a3 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -69,6 +69,8 @@ static int         tsdbEncodeCfg(void **buf, STsdbCfg *pCfg);
 static void *      tsdbDecodeCfg(void *buf, STsdbCfg *pCfg);
 static int         tsdbCheckTableSchema(STsdbRepo *pRepo, SSubmitBlk *pBlock, STable *pTable);
 static int         tsdbScanAndConvertSubmitMsg(STsdbRepo *pRepo, SSubmitMsg *pMsg);
+static void        tsdbStartStream(STsdbRepo *pRepo);
+static void        tsdbStopStream(STsdbRepo *pRepo);
 
 // Function declaration
 int32_t tsdbCreateRepo(char *rootDir, STsdbCfg *pCfg) {
@@ -127,6 +129,7 @@ TSDB_REPO_T *tsdbOpenRepo(char *rootDir, STsdbAppH *pAppH) {
     goto _err;
   }
 
+  tsdbStartStream(pRepo);
   // pRepo->state = TSDB_REPO_STATE_ACTIVE;
 
   tsdbDebug("vgId:%d open tsdb repository succeed!", REPO_ID(pRepo));
@@ -145,6 +148,8 @@ void tsdbCloseRepo(TSDB_REPO_T *repo, int toCommit) {
   STsdbRepo *pRepo = (STsdbRepo *)repo;
   int        vgId = REPO_ID(pRepo);
 
+  tsdbStopStream(repo);
+
   if (toCommit) {
     tsdbAsyncCommit(pRepo);
     if (pRepo->commit) pthread_join(pRepo->commitThread, NULL);
@@ -265,19 +270,6 @@ uint32_t tsdbGetFileInfo(TSDB_REPO_T *repo, char *name, uint32_t *index, uint32_
   return magic;
 }
 
-void tsdbStartStream(TSDB_REPO_T *repo) {
-  STsdbRepo *pRepo = (STsdbRepo *)repo;
-  STsdbMeta *pMeta = pRepo->tsdbMeta;
-
-  for (int i = 0; i < pRepo->config.maxTables; i++) {
-    STable *pTable = pMeta->tables[i];
-    if (pTable && pTable->type == TSDB_STREAM_TABLE) {
-      pTable->cqhandle = (*pRepo->appH.cqCreateFunc)(pRepo->appH.cqH, TABLE_UID(pTable), TABLE_TID(pTable), pTable->sql,
-                                                     tsdbGetTableSchemaImpl(pTable, false, false, -1));
-    }
-  }
-}
-
 STsdbCfg *tsdbGetCfg(const TSDB_REPO_T *repo) {
   ASSERT(repo != NULL);
   return &((STsdbRepo *)repo)->config;
@@ -1120,4 +1112,27 @@ TSKEY tsdbGetTableLastKey(TSDB_REPO_T *repo, uint64_t uid) {
   return TSDB_GET_TABLE_LAST_KEY(pTable);
 }
 
-#endif
\ No newline at end of file
+#endif
+
+static void tsdbStartStream(STsdbRepo *pRepo) {
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
+
+  for (int i = 0; i < pRepo->config.maxTables; i++) {
+    STable *pTable = pMeta->tables[i];
+    if (pTable && pTable->type == TSDB_STREAM_TABLE) {
+      pTable->cqhandle = (*pRepo->appH.cqCreateFunc)(pRepo->appH.cqH, TABLE_UID(pTable), TABLE_TID(pTable), pTable->sql,
+                                                     tsdbGetTableSchemaImpl(pTable, false, false, -1));
+    }
+  }
+}
+
+static void tsdbStopStream(STsdbRepo *pRepo) {
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
+
+  for (int i = 0; i < pRepo->config.maxTables; i++) {
+    STable *pTable = pMeta->tables[i];
+    if (pTable && pTable->type == TSDB_STREAM_TABLE) {
+      (*pRepo->appH.cqDropFunc)(pTable->cqhandle);
+    }
+  }
+}
diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 675e44f458..1cd212b216 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -18,11 +18,6 @@
 
 #define TSDB_DATA_SKIPLIST_LEVEL 5
 
-typedef struct {
-  STable *           pTable;
-  SSkipListIterator *pIter;
-} SCommitIter;
-
 static FORCE_INLINE STsdbBufBlock *tsdbGetCurrBufBlock(STsdbRepo *pRepo);
 
 static void        tsdbFreeBytes(STsdbRepo *pRepo, void *ptr, int bytes);
@@ -34,14 +29,11 @@ static char *      tsdbGetTsTupleKey(const void *data);
 static void *      tsdbCommitData(void *arg);
 static int         tsdbCommitMeta(STsdbRepo *pRepo);
 static void        tsdbEndCommit(STsdbRepo *pRepo);
-static TSKEY       tsdbNextIterKey(SCommitIter *pIter);
 static int         tsdbHasDataToCommit(SCommitIter *iters, int nIters, TSKEY minKey, TSKEY maxKey);
 static int  tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHelper *pHelper, SDataCols *pDataCols);
 static void tsdbGetFidKeyRange(int daysPerFile, int8_t precision, int fileId, TSKEY *minKey, TSKEY *maxKey);
-static SCommitIter *tsdbCreateTableIters(STsdbRepo *pRepo);
-static void         tsdbDestroyTableIters(SCommitIter *iters, int maxTables);
-static int          tsdbReadRowsFromCache(STsdbMeta *pMeta, STable *pTable, SSkipListIterator *pIter, TSKEY maxKey,
-                                          int maxRowsToRead, SDataCols *pCols);
+static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo);
+static void         tsdbDestroyCommitIters(SCommitIter *iters, int maxTables);
 
 // ---------------- INTERNAL FUNCTIONS ----------------
 int tsdbInsertRowToMem(STsdbRepo *pRepo, SDataRow row, STable *pTable) {
@@ -252,6 +244,66 @@ int tsdbAsyncCommit(STsdbRepo *pRepo) {
   return 0;
 }
 
+int tsdbLoadDataFromCache(STable *pTable, SSkipListIterator *pIter, TSKEY maxKey, int maxRowsToRead, SDataCols *pCols,
+                          TSKEY *filterKeys, int nFilterKeys) {
+  ASSERT(maxRowsToRead > 0 && nFilterKeys >= 0);
+  if (pIter == NULL) return 0;
+  STSchema *pSchema = NULL;
+  int       numOfRows = 0;
+  TSKEY     keyNext = 0;
+  int       filterIter = 0;
+
+  if (nFilterKeys != 0) { // for filter purpose
+    ASSERT(filterKeys != NULL);
+    keyNext = tsdbNextIterKey(pIter);
+    if (keyNext < 0 || keyNext > maxKey) return numOfRows;
+    void *ptr = taosbsearch((void *)(&keyNext), (void *)filterKeys, nFilterKeys, sizeof(TSKEY), compTSKEY, TD_GE);
+    filterIter = (ptr == NULL) ? nFilterKeys : (POINTER_DISTANCE(ptr, filterKeys) / sizeof(TSKEY));
+  }
+
+  do {
+    if (numOfRows >= maxRowsToRead) break;
+
+    SDataRow row = tsdbNextIterRow(pIter);
+    if (row == NULL) break;
+
+    keyNext = dataRowKey(row);
+    if (keyNext < 0 || keyNext > maxKey) break;
+
+    bool keyFiltered = false;
+    if (nFilterKeys != 0) {
+      while (true) {
+        if (filterIter >= nFilterKeys) break;
+        if (keyNext == filterKeys[filterIter]) {
+          keyFiltered = true;
+          filterIter++;
+          break;
+        } else if (keyNext < filterKeys[filterIter]) {
+          break;
+        } else {
+          filterIter++;
+        }
+      }
+    }
+
+    if (!keyFiltered) {
+      if (pCols) {
+        if (pSchema == NULL || schemaVersion(pSchema) != dataRowVersion(row)) {
+          pSchema = tsdbGetTableSchemaImpl(pTable, false, false, dataRowVersion(row));
+          if (pSchema == NULL) {
+            ASSERT(0);
+          }
+        }
+
+        tdAppendDataRowToDataCol(row, pSchema, pCols);
+      }
+      numOfRows++;
+    }
+  } while (tSkipListIterNext(pIter));
+
+  return numOfRows;
+}
+
 // ---------------- LOCAL FUNCTIONS ----------------
 static FORCE_INLINE STsdbBufBlock *tsdbGetCurrBufBlock(STsdbRepo *pRepo) {
   ASSERT(pRepo != NULL);
@@ -378,7 +430,7 @@ static void *tsdbCommitData(void *arg) {
 
   // Create the iterator to read from cache
   if (pMem->numOfRows > 0) {
-    iters = tsdbCreateTableIters(pRepo);
+    iters = tsdbCreateCommitIters(pRepo);
     if (iters == NULL) {
       tsdbError("vgId:%d failed to create commit iterator since %s", REPO_ID(pRepo), tstrerror(terrno));
       goto _exit;
@@ -418,7 +470,7 @@ static void *tsdbCommitData(void *arg) {
 
 _exit:
   tdFreeDataCols(pDataCols);
-  tsdbDestroyTableIters(iters, pCfg->maxTables);
+  tsdbDestroyCommitIters(iters, pCfg->maxTables);
   tsdbDestroyHelper(&whelper);
   tsdbEndCommit(pRepo);
   tsdbInfo("vgId:%d commit over", pRepo->config.tsdbId);
@@ -479,19 +531,9 @@ static void tsdbEndCommit(STsdbRepo *pRepo) {
   if (pRepo->appH.notifyStatus) pRepo->appH.notifyStatus(pRepo->appH.appH, TSDB_STATUS_COMMIT_OVER);
 }
 
-static TSKEY tsdbNextIterKey(SCommitIter *pIter) {
-  if (pIter == NULL) return -1;
-
-  SSkipListNode *node = tSkipListIterGet(pIter->pIter);
-  if (node == NULL) return -1;
-
-  SDataRow row = SL_GET_NODE_DATA(node);
-  return dataRowKey(row);
-}
-
 static int tsdbHasDataToCommit(SCommitIter *iters, int nIters, TSKEY minKey, TSKEY maxKey) {
   for (int i = 0; i < nIters; i++) {
-    TSKEY nextKey = tsdbNextIterKey(iters + i);
+    TSKEY nextKey = tsdbNextIterKey((iters + i)->pIter);
     if (nextKey > 0 && (nextKey >= minKey && nextKey <= maxKey)) return 1;
   }
   return 0;
@@ -504,7 +546,6 @@ static void tsdbGetFidKeyRange(int daysPerFile, int8_t precision, int fileId, TS
 
 static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHelper *pHelper, SDataCols *pDataCols) {
   char *      dataDir = NULL;
-  STsdbMeta * pMeta = pRepo->tsdbMeta;
   STsdbCfg *  pCfg = &pRepo->config;
   STsdbFileH *pFileH = pRepo->tsdbFileH;
   SFileGroup *pGroup = NULL;
@@ -549,33 +590,13 @@ static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHe
     if (pIter->pIter != NULL) {
       tdInitDataCols(pDataCols, tsdbGetTableSchemaImpl(pIter->pTable, false, false, -1));
 
-      int maxRowsToRead = pCfg->maxRowsPerFileBlock * 4 / 5;
-      int nLoop = 0;
-      while (true) {
-        int rowsRead = tsdbReadRowsFromCache(pMeta, pIter->pTable, pIter->pIter, maxKey, maxRowsToRead, pDataCols);
-        ASSERT(rowsRead >= 0);
-        if (pDataCols->numOfRows == 0) break;
-        nLoop++;
-
-        ASSERT(dataColsKeyFirst(pDataCols) >= minKey && dataColsKeyFirst(pDataCols) <= maxKey);
-        ASSERT(dataColsKeyLast(pDataCols) >= minKey && dataColsKeyLast(pDataCols) <= maxKey);
-
-        int rowsWritten = tsdbWriteDataBlock(pHelper, pDataCols);
-        ASSERT(rowsWritten != 0);
-        if (rowsWritten < 0) {
-          taosRUnLockLatch(&(pIter->pTable->latch));
-          tsdbError("vgId:%d failed to write data block to table %s tid %d uid %" PRIu64 " since %s", REPO_ID(pRepo),
-                    TABLE_CHAR_NAME(pIter->pTable), TABLE_TID(pIter->pTable), TABLE_UID(pIter->pTable),
-                    tstrerror(terrno));
-          goto _err;
-        }
-        ASSERT(rowsWritten <= pDataCols->numOfRows);
-
-        tdPopDataColsPoints(pDataCols, rowsWritten);
-        maxRowsToRead = pCfg->maxRowsPerFileBlock * 4 / 5 - pDataCols->numOfRows;
+      if (tsdbCommitTableData(pHelper, pIter, pDataCols, maxKey) < 0) {
+        taosRUnLockLatch(&(pIter->pTable->latch));
+        tsdbError("vgId:%d failed to write data of table %s tid %d uid %" PRIu64 " since %s", REPO_ID(pRepo),
+                  TABLE_CHAR_NAME(pIter->pTable), TABLE_TID(pIter->pTable), TABLE_UID(pIter->pTable),
+                  tstrerror(terrno));
+        goto _err;
       }
-
-      ASSERT(pDataCols->numOfRows == 0);
     }
 
     taosRUnLockLatch(&(pIter->pTable->latch));
@@ -615,7 +636,7 @@ _err:
   return -1;
 }
 
-static SCommitIter *tsdbCreateTableIters(STsdbRepo *pRepo) {
+static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo) {
   STsdbCfg * pCfg = &(pRepo->config);
   SMemTable *pMem = pRepo->imem;
   STsdbMeta *pMeta = pRepo->tsdbMeta;
@@ -645,21 +666,18 @@ static SCommitIter *tsdbCreateTableIters(STsdbRepo *pRepo) {
         goto _err;
       }
 
-      if (!tSkipListIterNext(iters[i].pIter)) {
-        terrno = TSDB_CODE_TDB_NO_TABLE_DATA_IN_MEM;
-        goto _err;
-      }
+      tSkipListIterNext(iters[i].pIter);
     }
   }
 
   return iters;
 
 _err:
-  tsdbDestroyTableIters(iters, pCfg->maxTables);
+  tsdbDestroyCommitIters(iters, pCfg->maxTables);
   return NULL;
 }
 
-static void tsdbDestroyTableIters(SCommitIter *iters, int maxTables) {
+static void tsdbDestroyCommitIters(SCommitIter *iters, int maxTables) {
   if (iters == NULL) return;
 
   for (int i = 1; i < maxTables; i++) {
@@ -670,35 +688,4 @@ static void tsdbDestroyTableIters(SCommitIter *iters, int maxTables) {
   }
 
   free(iters);
-}
-
-static int tsdbReadRowsFromCache(STsdbMeta *pMeta, STable *pTable, SSkipListIterator *pIter, TSKEY maxKey, int maxRowsToRead, SDataCols *pCols) {
-  ASSERT(maxRowsToRead > 0);
-  if (pIter == NULL) return 0;
-  STSchema *pSchema = NULL;
-
-  int numOfRows = 0;
-
-  do {
-    if (numOfRows >= maxRowsToRead) break;
-
-    SSkipListNode *node = tSkipListIterGet(pIter);
-    if (node == NULL) break;
-
-    SDataRow row = SL_GET_NODE_DATA(node);
-    if (dataRowKey(row) > maxKey) break;
-
-    if (pSchema == NULL || schemaVersion(pSchema) != dataRowVersion(row)) {
-      pSchema = tsdbGetTableSchemaImpl(pTable, true, false, dataRowVersion(row));
-      if (pSchema == NULL) {
-        // TODO: deal with the error here
-        ASSERT(0);
-      }
-    }
-
-    tdAppendDataRowToDataCol(row, pSchema, pCols);
-    numOfRows++;
-  } while (tSkipListIterNext(pIter));
-
-  return numOfRows;
 }
\ No newline at end of file
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index 84c1c8e7d1..fcf9b04e4a 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -57,8 +57,30 @@ int tsdbCreateTable(TSDB_REPO_T *repo, STableCfg *pCfg) {
   STable *   super = NULL;
   STable *   table = NULL;
   int        newSuper = 0;
+  int        tid = pCfg->tableId.tid;
+  STable *   pTable = NULL;
 
-  STable *pTable = tsdbGetTableByUid(pMeta, pCfg->tableId.uid);
+  if (tid < 0 || tid >= pRepo->config.maxTables) {
+    tsdbError("vgId:%d failed to create table since invalid tid %d", REPO_ID(pRepo), tid);
+    terrno = TSDB_CODE_TDB_IVD_CREATE_TABLE_INFO;
+    goto _err;
+  }
+
+  if (pMeta->tables[tid] != NULL) {
+    if (TABLE_UID(pMeta->tables[tid]) == pCfg->tableId.uid) {
+      tsdbError("vgId:%d table %s already exists, tid %d uid %" PRId64, REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
+                TABLE_TID(pTable), TABLE_UID(pTable));
+      return TSDB_CODE_TDB_TABLE_ALREADY_EXIST;
+    } else {
+      tsdbError("vgId:%d table %s at tid %d uid %" PRIu64
+                " exists, replace it with new table, this can be not reasonable",
+                REPO_ID(pRepo), TABLE_CHAR_NAME(pMeta->tables[tid]), TABLE_TID(pMeta->tables[tid]),
+                TABLE_UID(pMeta->tables[tid]));
+      tsdbDropTable(pRepo, pMeta->tables[tid]->tableId);
+    }
+  }
+
+  pTable = tsdbGetTableByUid(pMeta, pCfg->tableId.uid);
   if (pTable != NULL) {
     tsdbError("vgId:%d table %s already exists, tid %d uid %" PRId64, REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
               TABLE_TID(pTable), TABLE_UID(pTable));
@@ -72,10 +94,10 @@ int tsdbCreateTable(TSDB_REPO_T *repo, STableCfg *pCfg) {
       super = tsdbNewTable(pCfg, true);
       if (super == NULL) goto _err;
     } else {
-      // TODO
-      if (super->type != TSDB_SUPER_TABLE) return -1;
-      if (super->tableId.uid != pCfg->superUid) return -1;
-      // tsdbUpdateTable(pRepo, super, pCfg);
+      if (TABLE_TYPE(super) != TSDB_SUPER_TABLE || TABLE_UID(super) != pCfg->superUid) {
+        terrno = TSDB_CODE_TDB_IVD_CREATE_TABLE_INFO;
+        goto _err;
+      }
     }
   }
 
@@ -705,6 +727,9 @@ static STable *tsdbNewTable(STableCfg *pCfg, bool isSuper) {
 
   T_REF_INC(pTable);
 
+  tsdbTrace("table %s tid %d uid %" PRIu64 " is created", TABLE_CHAR_NAME(pTable), TABLE_TID(pTable),
+            TABLE_UID(pTable));
+
   return pTable;
 
 _err:
@@ -714,7 +739,9 @@ _err:
 
 static void tsdbFreeTable(STable *pTable) {
   if (pTable) {
-    if (pTable->name != NULL) tsdbDebug("table %s is destroyed", TABLE_CHAR_NAME(pTable));
+    if (pTable->name != NULL)
+      tsdbTrace("table %s tid %d uid %" PRIu64 " is freed", TABLE_CHAR_NAME(pTable), TABLE_TID(pTable),
+                TABLE_UID(pTable));
     tfree(TABLE_NAME(pTable));
     if (TABLE_TYPE(pTable) != TSDB_CHILD_TABLE) {
       for (int i = 0; i < TSDB_MAX_TABLE_SCHEMAS; i++) {
@@ -782,7 +809,7 @@ static int tsdbAddTableToMeta(STsdbRepo *pRepo, STable *pTable, bool addIdx, boo
                                                    tsdbGetTableSchemaImpl(pTable, false, false, -1));
   }
 
-  tsdbTrace("vgId:%d table %s tid %d uid %" PRIu64 " is added to meta", REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
+  tsdbDebug("vgId:%d table %s tid %d uid %" PRIu64 " is added to meta", REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
             TABLE_TID(pTable), TABLE_UID(pTable));
   return 0;
 
diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index 326da07a36..040b4a5334 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -22,39 +22,44 @@
 #include "tfile.h"
 
 #define TSDB_GET_COMPCOL_LEN(nCols) (sizeof(SCompData) + sizeof(SCompCol) * (nCols) + sizeof(TSCKSUM))
+#define TSDB_KEY_COL_OFFSET 0
+#define TSDB_GET_COMPBLOCK_IDX(h, b) (POINTER_DISTANCE(b, (h)->pCompInfo->blocks)/sizeof(SCompBlock))
 
-static bool  tsdbShouldCreateNewLast(SRWHelper *pHelper);
-static int   tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDataCols, int rowsToWrite,
-                                  SCompBlock *pCompBlock, bool isLast, bool isSuperBlock);
-static int   compareKeyBlock(const void *arg1, const void *arg2);
-static int   tsdbMergeDataWithBlock(SRWHelper *pHelper, int blkIdx, SDataCols *pDataCols);
-static int   compTSKEY(const void *key1, const void *key2);
-static int   tsdbAdjustInfoSizeIfNeeded(SRWHelper *pHelper, size_t esize);
-static int   tsdbInsertSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int blkIdx);
-static int   tsdbAddSubBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int blkIdx, int rowsAdded);
-static int   tsdbUpdateSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int blkIdx);
-static int   tsdbGetRowsInRange(SDataCols *pDataCols, TSKEY minKey, TSKEY maxKey);
-static void  tsdbResetHelperFileImpl(SRWHelper *pHelper);
-static int   tsdbInitHelperFile(SRWHelper *pHelper);
-static void  tsdbDestroyHelperFile(SRWHelper *pHelper);
-static void  tsdbResetHelperTableImpl(SRWHelper *pHelper);
-static void  tsdbResetHelperTable(SRWHelper *pHelper);
-static void  tsdbInitHelperTable(SRWHelper *pHelper);
-static void  tsdbDestroyHelperTable(SRWHelper *pHelper);
-static void  tsdbResetHelperBlockImpl(SRWHelper *pHelper);
-static void  tsdbResetHelperBlock(SRWHelper *pHelper);
-static int   tsdbInitHelperBlock(SRWHelper *pHelper);
-static int   tsdbInitHelper(SRWHelper *pHelper, STsdbRepo *pRepo, tsdb_rw_helper_t type);
-static int   tsdbCheckAndDecodeColumnData(SDataCol *pDataCol, char *content, int32_t len, int8_t comp, int numOfRows,
-                                          int maxPoints, char *buffer, int bufferSize);
-static int tsdbLoadBlockDataColsImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDataCols *pDataCols, int16_t *colIds,
-                                     int numOfColIds);
-static int   tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDataCols *pDataCols);
-static int   tsdbEncodeSCompIdx(void **buf, SCompIdx *pIdx);
+static bool tsdbShouldCreateNewLast(SRWHelper *pHelper);
+static int  tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDataCols, SCompBlock *pCompBlock,
+                                 bool isLast, bool isSuperBlock);
+static int  compareKeyBlock(const void *arg1, const void *arg2);
+static int  tsdbAdjustInfoSizeIfNeeded(SRWHelper *pHelper, size_t esize);
+static int  tsdbInsertSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int blkIdx);
+static int  tsdbAddSubBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int blkIdx, int rowsAdded);
+static int  tsdbUpdateSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int blkIdx);
+static void tsdbResetHelperFileImpl(SRWHelper *pHelper);
+static int  tsdbInitHelperFile(SRWHelper *pHelper);
+static void tsdbDestroyHelperFile(SRWHelper *pHelper);
+static void tsdbResetHelperTableImpl(SRWHelper *pHelper);
+static void tsdbResetHelperTable(SRWHelper *pHelper);
+static void tsdbInitHelperTable(SRWHelper *pHelper);
+static void tsdbDestroyHelperTable(SRWHelper *pHelper);
+static void tsdbResetHelperBlockImpl(SRWHelper *pHelper);
+static void tsdbResetHelperBlock(SRWHelper *pHelper);
+static int  tsdbInitHelperBlock(SRWHelper *pHelper);
+static int  tsdbInitHelper(SRWHelper *pHelper, STsdbRepo *pRepo, tsdb_rw_helper_t type);
+static int  tsdbCheckAndDecodeColumnData(SDataCol *pDataCol, char *content, int32_t len, int8_t comp, int numOfRows,
+                                         int maxPoints, char *buffer, int bufferSize);
+static int  tsdbLoadBlockDataColsImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDataCols *pDataCols, int16_t *colIds,
+                                      int numOfColIds);
+static int  tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDataCols *pDataCols);
+static int  tsdbEncodeSCompIdx(void **buf, SCompIdx *pIdx);
 static void *tsdbDecodeSCompIdx(void *buf, SCompIdx *pIdx);
+static int   tsdbProcessAppendCommit(SRWHelper *pHelper, SCommitIter *pCommitIter, SDataCols *pDataCols, TSKEY maxKey);
 static void  tsdbDestroyHelperBlock(SRWHelper *pHelper);
 static int   tsdbLoadColData(SRWHelper *pHelper, SFile *pFile, SCompBlock *pCompBlock, SCompCol *pCompCol,
                              SDataCol *pDataCol);
+static int   tsdbWriteBlockToProperFile(SRWHelper *pHelper, SDataCols *pDataCols, SCompBlock *pCompBlock);
+static int   tsdbProcessMergeCommit(SRWHelper *pHelper, SCommitIter *pCommitIter, SDataCols *pDataCols, TSKEY maxKey,
+                                    int *blkIdx);
+static int   tsdbLoadAndMergeFromCache(SDataCols *pDataCols, int *iter, SCommitIter *pCommitIter, SDataCols *pTarget,
+                                       TSKEY maxKey, int maxRows);
 
 // ---------------------- INTERNAL FUNCTIONS ----------------------
 int tsdbInitReadHelper(SRWHelper *pHelper, STsdbRepo *pRepo) {
@@ -225,84 +230,41 @@ void tsdbSetHelperTable(SRWHelper *pHelper, STable *pTable, STsdbRepo *pRepo) {
   tdInitDataCols(pHelper->pDataCols[1], pSchema);
 
   SCompIdx *pIdx = pHelper->pCompIdx + pTable->tableId.tid;
-  if (pIdx->offset > 0 && pIdx->hasLast) {
-    pHelper->hasOldLastBlock = true;
+  if (pIdx->offset > 0) {
+    if (pIdx->uid != TABLE_UID(pTable)) {
+      memset((void *)pIdx, 0, sizeof(SCompIdx));
+    } else {
+      if (pIdx->hasLast) pHelper->hasOldLastBlock = true;
+    }
   }
 
   helperSetState(pHelper, TSDB_HELPER_TABLE_SET);
   ASSERT(pHelper->state == ((TSDB_HELPER_TABLE_SET << 1) - 1));
 }
 
-/**
- * Write part of of points from pDataCols to file
- *
- * @return: number of points written to file successfully
- *          -1 for failure
- */
-int tsdbWriteDataBlock(SRWHelper *pHelper, SDataCols *pDataCols) {
+int tsdbCommitTableData(SRWHelper *pHelper, SCommitIter *pCommitIter, SDataCols *pDataCols, TSKEY maxKey) {
   ASSERT(helperType(pHelper) == TSDB_WRITE_HELPER);
-  ASSERT(pDataCols->numOfRows > 0);
 
-  SCompBlock compBlock;
-  int        rowsToWrite = 0;
-  TSKEY      keyFirst = dataColsKeyFirst(pDataCols);
+  SCompIdx * pIdx = &(pHelper->pCompIdx[TABLE_TID(pCommitIter->pTable)]);
+  int        blkIdx = 0;
 
-  STsdbCfg *pCfg = &pHelper->pRepo->config;
+  ASSERT(pIdx->offset == 0 || pIdx->uid == TABLE_UID(pCommitIter->pTable));
+  if (tsdbLoadCompInfo(pHelper, NULL) < 0) return -1;
 
-  ASSERT(helperHasState(pHelper, TSDB_HELPER_IDX_LOAD));
-  SCompIdx *pIdx = pHelper->pCompIdx + pHelper->tableInfo.tid;  // for change purpose
+  while (true) {
+    ASSERT(blkIdx <= pIdx->numOfBlocks);
+    TSKEY keyFirst = tsdbNextIterKey(pCommitIter->pIter);
+    if (keyFirst < 0 || keyFirst > maxKey) break;  // iter over
 
-  // Load the SCompInfo part if neccessary
-  ASSERT(helperHasState(pHelper, TSDB_HELPER_TABLE_SET));
-  if (tsdbLoadCompInfo(pHelper, NULL) < 0) goto _err;
-
-  if (pIdx->offset == 0 || (!pIdx->hasLast && keyFirst > pIdx->maxKey)) {  // Just append as a super block
-    ASSERT(pHelper->hasOldLastBlock == false);
-    rowsToWrite = pDataCols->numOfRows;
-    SFile *pWFile = NULL;
-    bool   isLast = false;
-
-    if (rowsToWrite >= pCfg->minRowsPerFileBlock) {
-      pWFile = &(pHelper->files.dataF);
+    if (pIdx->len <= 0 || keyFirst > pIdx->maxKey) {
+      if (tsdbProcessAppendCommit(pHelper, pCommitIter, pDataCols, maxKey) < 0) return -1;
+      blkIdx = pIdx->numOfBlocks;
     } else {
-      isLast = true;
-      pWFile = (pHelper->files.nLastF.fd > 0) ? &(pHelper->files.nLastF) : &(pHelper->files.lastF);
-    }
-
-    if (tsdbWriteBlockToFile(pHelper, pWFile, pDataCols, rowsToWrite, &compBlock, isLast, true) < 0) goto _err;
-
-    if (tsdbInsertSuperBlock(pHelper, &compBlock, pIdx->numOfBlocks) < 0) goto _err;
-  } else {  // (Has old data) AND ((has last block) OR (key overlap)), need to merge the block
-    SCompBlock *pCompBlock = taosbsearch((void *)(&keyFirst), (void *)(pHelper->pCompInfo->blocks), pIdx->numOfBlocks,
-                                         sizeof(SCompBlock), compareKeyBlock, TD_GE);
-
-    int blkIdx = (pCompBlock == NULL) ? (pIdx->numOfBlocks - 1) : (pCompBlock - pHelper->pCompInfo->blocks);
-
-    if (pCompBlock == NULL) {  // No key overlap, must has last block, just merge with the last block
-      ASSERT(pIdx->hasLast && pHelper->pCompInfo->blocks[pIdx->numOfBlocks - 1].last);
-      rowsToWrite = tsdbMergeDataWithBlock(pHelper, blkIdx, pDataCols);
-      if (rowsToWrite < 0) goto _err;
-    } else {  // Has key overlap
-
-      if (compareKeyBlock((void *)(&keyFirst), (void *)pCompBlock) == 0) {
-        // Key overlap with the block, must merge with the block
-
-        rowsToWrite = tsdbMergeDataWithBlock(pHelper, blkIdx, pDataCols);
-        if (rowsToWrite < 0) goto _err;
-      } else {  // Save as a super block in the middle
-        rowsToWrite = tsdbGetRowsInRange(pDataCols, 0, pCompBlock->keyFirst - 1);
-        ASSERT(rowsToWrite > 0);
-        if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.dataF), pDataCols, rowsToWrite, &compBlock, false, true) < 0)
-          goto _err;
-        if (tsdbInsertSuperBlock(pHelper, &compBlock, blkIdx) < 0) goto _err;
-      }
+      if (tsdbProcessMergeCommit(pHelper, pCommitIter, pDataCols, maxKey, &blkIdx) < 0) return -1;
     }
   }
 
-  return rowsToWrite;
-
-_err:
-  return -1;
+  return 0;
 }
 
 int tsdbMoveLastBlockIfNeccessary(SRWHelper *pHelper) {
@@ -310,29 +272,42 @@ int tsdbMoveLastBlockIfNeccessary(SRWHelper *pHelper) {
 
   ASSERT(helperType(pHelper) == TSDB_WRITE_HELPER);
   SCompIdx * pIdx = pHelper->pCompIdx + pHelper->tableInfo.tid;
-  SCompBlock compBlock;
-  if ((pHelper->files.nLastF.fd > 0) && (pHelper->hasOldLastBlock)) {
+  SCompBlock compBlock = {0};
+  if (TSDB_NLAST_FILE_OPENED(pHelper) && (pHelper->hasOldLastBlock)) {
     if (tsdbLoadCompInfo(pHelper, NULL) < 0) return -1;
 
-    SCompBlock *pCompBlock = pHelper->pCompInfo->blocks + pIdx->numOfBlocks - 1;
+    SCompBlock *pCompBlock = blockAtIdx(pHelper, pIdx->numOfBlocks - 1);
     ASSERT(pCompBlock->last);
 
     if (pCompBlock->numOfSubBlocks > 1) {
-      if (tsdbLoadBlockData(pHelper, blockAtIdx(pHelper, pIdx->numOfBlocks - 1), NULL) < 0) return -1;
-      ASSERT(pHelper->pDataCols[0]->numOfRows > 0 && pHelper->pDataCols[0]->numOfRows < pCfg->minRowsPerFileBlock);
-      if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.nLastF), pHelper->pDataCols[0],
-                               pHelper->pDataCols[0]->numOfRows, &compBlock, true, true) < 0)
+      if (tsdbLoadBlockData(pHelper, pCompBlock, NULL) < 0) return -1;
+      ASSERT(pHelper->pDataCols[0]->numOfRows == pCompBlock->numOfRows &&
+             pHelper->pDataCols[0]->numOfRows < pCfg->minRowsPerFileBlock);
+      if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.nLastF), pHelper->pDataCols[0], &compBlock, true, true) < 0)
         return -1;
 
       if (tsdbUpdateSuperBlock(pHelper, &compBlock, pIdx->numOfBlocks - 1) < 0) return -1;
-
     } else {
-      if (lseek(pHelper->files.lastF.fd, pCompBlock->offset, SEEK_SET) < 0) return -1;
-      pCompBlock->offset = lseek(pHelper->files.nLastF.fd, 0, SEEK_END);
-      if (pCompBlock->offset < 0) return -1;
-
-      if (tsendfile(pHelper->files.nLastF.fd, pHelper->files.lastF.fd, NULL, pCompBlock->len) < pCompBlock->len)
+      if (lseek(pHelper->files.lastF.fd, pCompBlock->offset, SEEK_SET) < 0) {
+        tsdbError("vgId:%d failed to lseek file %s since %s", REPO_ID(pHelper->pRepo), pHelper->files.lastF.fname,
+                  strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
         return -1;
+      }
+      pCompBlock->offset = lseek(pHelper->files.nLastF.fd, 0, SEEK_END);
+      if (pCompBlock->offset < 0) {
+        tsdbError("vgId:%d failed to lseek file %s since %s", REPO_ID(pHelper->pRepo), pHelper->files.nLastF.fname,
+                  strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        return -1;
+      }
+
+      if (tsendfile(pHelper->files.nLastF.fd, pHelper->files.lastF.fd, NULL, pCompBlock->len) < pCompBlock->len) {
+        tsdbError("vgId:%d failed to sendfile from file %s to file %s since %s", REPO_ID(pHelper->pRepo),
+                  pHelper->files.lastF.fname, pHelper->files.nLastF.fname, strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        return -1;
+      }
     }
 
     pHelper->hasOldLastBlock = false;
@@ -365,27 +340,30 @@ int tsdbWriteCompInfo(SRWHelper *pHelper) {
       }
     }
   } else {
-    pHelper->pCompInfo->delimiter = TSDB_FILE_DELIMITER;
-    pHelper->pCompInfo->uid = pHelper->tableInfo.uid;
-    pHelper->pCompInfo->checksum = 0;
-    ASSERT((pIdx->len - sizeof(SCompInfo) - sizeof(TSCKSUM)) % sizeof(SCompBlock) == 0);
-    taosCalcChecksumAppend(0, (uint8_t *)pHelper->pCompInfo, pIdx->len);
-    offset = lseek(pHelper->files.nHeadF.fd, 0, SEEK_END);
-    if (offset < 0) {
-      tsdbError("vgId:%d failed to lseek file %s since %s", REPO_ID(pHelper->pRepo), pHelper->files.nHeadF.fname,
-                strerror(errno));
-      terrno = TAOS_SYSTEM_ERROR(errno);
-      return -1;
-    }
-    pIdx->offset = offset;
-    pIdx->uid = pHelper->tableInfo.uid;
-    ASSERT(pIdx->offset >= TSDB_FILE_HEAD_SIZE);
+    if (pIdx->len > 0) {
+      pHelper->pCompInfo->delimiter = TSDB_FILE_DELIMITER;
+      pHelper->pCompInfo->uid = pHelper->tableInfo.uid;
+      pHelper->pCompInfo->checksum = 0;
+      ASSERT(pIdx->len > sizeof(SCompInfo) + sizeof(TSCKSUM) &&
+             (pIdx->len - sizeof(SCompInfo) - sizeof(TSCKSUM)) % sizeof(SCompBlock) == 0);
+      taosCalcChecksumAppend(0, (uint8_t *)pHelper->pCompInfo, pIdx->len);
+      offset = lseek(pHelper->files.nHeadF.fd, 0, SEEK_END);
+      if (offset < 0) {
+        tsdbError("vgId:%d failed to lseek file %s since %s", REPO_ID(pHelper->pRepo), pHelper->files.nHeadF.fname,
+                  strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        return -1;
+      }
+      pIdx->offset = offset;
+      pIdx->uid = pHelper->tableInfo.uid;
+      ASSERT(pIdx->offset >= TSDB_FILE_HEAD_SIZE);
 
-    if (twrite(pHelper->files.nHeadF.fd, (void *)(pHelper->pCompInfo), pIdx->len) < pIdx->len) {
-      tsdbError("vgId:%d failed to write %d bytes to file %s since %s", REPO_ID(pHelper->pRepo), pIdx->len,
-                pHelper->files.nHeadF.fname, strerror(errno));
-      terrno = TAOS_SYSTEM_ERROR(errno);
-      return -1;
+      if (twrite(pHelper->files.nHeadF.fd, (void *)(pHelper->pCompInfo), pIdx->len) < pIdx->len) {
+        tsdbError("vgId:%d failed to write %d bytes to file %s since %s", REPO_ID(pHelper->pRepo), pIdx->len,
+                  pHelper->files.nHeadF.fname, strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        return -1;
+      }
     }
   }
 
@@ -397,7 +375,12 @@ int tsdbWriteCompIdx(SRWHelper *pHelper) {
 
   ASSERT(helperType(pHelper) == TSDB_WRITE_HELPER);
   off_t offset = lseek(pHelper->files.nHeadF.fd, 0, SEEK_END);
-  if (offset < 0) return -1;
+  if (offset < 0) {
+    tsdbError("vgId:%d failed to lseek file %s to end since %s", REPO_ID(pHelper->pRepo), pHelper->files.nHeadF.fname,
+              strerror(errno));
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return -1;
+  }
 
   SFile *pFile = &(pHelper->files.nHeadF);
   pFile->info.offset = offset;
@@ -409,6 +392,10 @@ int tsdbWriteCompIdx(SRWHelper *pHelper) {
       int drift = POINTER_DISTANCE(buf, pHelper->pBuffer);
       if (tsizeof(pHelper->pBuffer) - drift < 128) {
         pHelper->pBuffer = trealloc(pHelper->pBuffer, tsizeof(pHelper->pBuffer) * 2);
+        if (pHelper->pBuffer == NULL) {
+          terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+          return -1;
+        }
       }
       buf = POINTER_SHIFT(pHelper->pBuffer, drift);
       taosEncodeVariantU32(&buf, i);
@@ -419,7 +406,12 @@ int tsdbWriteCompIdx(SRWHelper *pHelper) {
   int tsize = (char *)buf - (char *)pHelper->pBuffer + sizeof(TSCKSUM);
   taosCalcChecksumAppend(0, (uint8_t *)pHelper->pBuffer, tsize);
 
-  if (twrite(pHelper->files.nHeadF.fd, (void *)pHelper->pBuffer, tsize) < tsize) return -1;
+  if (twrite(pHelper->files.nHeadF.fd, (void *)pHelper->pBuffer, tsize) < tsize) {
+    tsdbError("vgId:%d failed to write %d bytes to file %s since %s", REPO_ID(pHelper->pRepo), tsize,
+              pHelper->files.nHeadF.fname, strerror(errno));
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return -1;
+  }
   pFile->info.len = tsize;
   return 0;
 }
@@ -496,11 +488,29 @@ int tsdbLoadCompInfo(SRWHelper *pHelper, void *target) {
 
   if (!helperHasState(pHelper, TSDB_HELPER_INFO_LOAD)) {
     if (pIdx->offset > 0) {
-      if (lseek(fd, pIdx->offset, SEEK_SET) < 0) return -1;
+      ASSERT(pIdx->uid == pHelper->tableInfo.uid);
+      if (lseek(fd, pIdx->offset, SEEK_SET) < 0) {
+        tsdbError("vgId:%d failed to lseek file %s since %s", REPO_ID(pHelper->pRepo), pHelper->files.headF.fname,
+                  strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        return -1;
+      }
 
       pHelper->pCompInfo = trealloc((void *)pHelper->pCompInfo, pIdx->len);
-      if (tread(fd, (void *)(pHelper->pCompInfo), pIdx->len) < pIdx->len) return -1;
-      if (!taosCheckChecksumWhole((uint8_t *)pHelper->pCompInfo, pIdx->len)) return -1;
+      if (tread(fd, (void *)(pHelper->pCompInfo), pIdx->len) < pIdx->len) {
+        tsdbError("vgId:%d failed to read %d bytes from file %s since %s", REPO_ID(pHelper->pRepo), pIdx->len,
+                  pHelper->files.headF.fname, strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        return -1;
+      }
+      if (!taosCheckChecksumWhole((uint8_t *)pHelper->pCompInfo, pIdx->len)) {
+        tsdbError("vgId:%d file %s SCompInfo part is corrupted, tid %d uid %" PRIu64, REPO_ID(pHelper->pRepo),
+                  pHelper->files.headF.fname, pHelper->tableInfo.tid, pHelper->tableInfo.uid);
+        terrno = TSDB_CODE_TDB_FILE_CORRUPTED;
+        return -1;
+      }
+
+      ASSERT(pIdx->uid == pHelper->pCompInfo->uid);
     }
 
     helperSetState(pHelper, TSDB_HELPER_INFO_LOAD);
@@ -628,13 +638,14 @@ static bool tsdbShouldCreateNewLast(SRWHelper *pHelper) {
   return false;
 }
 
-static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDataCols, int rowsToWrite,
-                                SCompBlock *pCompBlock, bool isLast, bool isSuperBlock) {
+static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDataCols, SCompBlock *pCompBlock,
+                                bool isLast, bool isSuperBlock) {
   STsdbCfg * pCfg = &(pHelper->pRepo->config);
   SCompData *pCompData = (SCompData *)(pHelper->pBuffer);
   int64_t    offset = 0;
+  int        rowsToWrite = pDataCols->numOfRows;
 
-  ASSERT(rowsToWrite > 0 && rowsToWrite <= pDataCols->numOfRows && rowsToWrite <= pCfg->maxRowsPerFileBlock);
+  ASSERT(rowsToWrite > 0 && rowsToWrite <= pCfg->maxRowsPerFileBlock);
   ASSERT(isLast ? rowsToWrite < pCfg->minRowsPerFileBlock : true);
 
   offset = lseek(pFile->fd, 0, SEEK_END);
@@ -646,7 +657,7 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
   }
 
   int nColsNotAllNull = 0;
-  for (int ncol = 0; ncol < pDataCols->numOfCols; ncol++) {
+  for (int ncol = 1; ncol < pDataCols->numOfCols; ncol++) {  // ncol from 1, we skip the timestamp column
     SDataCol *pDataCol = pDataCols->cols + ncol;
     SCompCol *pCompCol = pCompData->cols + nColsNotAllNull;
 
@@ -658,7 +669,7 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
 
     pCompCol->colId = pDataCol->colId;
     pCompCol->type = pDataCol->type;
-    if (tDataTypeDesc[pDataCol->type].getStatisFunc && ncol != 0) {
+    if (tDataTypeDesc[pDataCol->type].getStatisFunc) {
       (*tDataTypeDesc[pDataCol->type].getStatisFunc)(
           (TSKEY *)(pDataCols->cols[0].pData), pDataCol->pData, rowsToWrite, &(pCompCol->min), &(pCompCol->max),
           &(pCompCol->sum), &(pCompCol->minIndex), &(pCompCol->maxIndex), &(pCompCol->numOfNull));
@@ -666,24 +677,24 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
     nColsNotAllNull++;
   }
 
-  ASSERT(nColsNotAllNull > 0 && nColsNotAllNull <= pDataCols->numOfCols);
+  ASSERT(nColsNotAllNull >= 0 && nColsNotAllNull <= pDataCols->numOfCols);
 
   // Compress the data if neccessary
   int     tcol = 0;
   int32_t toffset = 0;
   int32_t tsize = TSDB_GET_COMPCOL_LEN(nColsNotAllNull);
   int32_t lsize = tsize;
+  int32_t keyLen = 0;
   for (int ncol = 0; ncol < pDataCols->numOfCols; ncol++) {
     if (tcol >= nColsNotAllNull) break;
 
     SDataCol *pDataCol = pDataCols->cols + ncol;
     SCompCol *pCompCol = pCompData->cols + tcol;
 
-    if (pDataCol->colId != pCompCol->colId) continue;
-    void *tptr = (void *)((char *)pCompData + lsize);
-
-    pCompCol->offset = toffset;
+    if (ncol != 0 && (pDataCol->colId != pCompCol->colId)) continue;
+    void *tptr = POINTER_SHIFT(pCompData, lsize);
 
+    int32_t flen = 0;  // final length
     int32_t tlen = dataColGetNEleLen(pDataCol, rowsToWrite);
 
     if (pCfg->compression) {
@@ -695,22 +706,29 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
         }
       }
 
-      pCompCol->len = (*(tDataTypeDesc[pDataCol->type].compFunc))((char *)pDataCol->pData, tlen, rowsToWrite, tptr,
-                                                                  tsizeof(pHelper->pBuffer) - lsize, pCfg->compression,
-                                                                  pHelper->compBuffer, tsizeof(pHelper->compBuffer));
+      flen = (*(tDataTypeDesc[pDataCol->type].compFunc))((char *)pDataCol->pData, tlen, rowsToWrite, tptr,
+                                                         tsizeof(pHelper->pBuffer) - lsize, pCfg->compression,
+                                                         pHelper->compBuffer, tsizeof(pHelper->compBuffer));
     } else {
-      pCompCol->len = tlen;
-      memcpy(tptr, pDataCol->pData, pCompCol->len);
+      flen = tlen;
+      memcpy(tptr, pDataCol->pData, flen);
     }
 
     // Add checksum
-    ASSERT(pCompCol->len > 0);
-    pCompCol->len += sizeof(TSCKSUM);
-    taosCalcChecksumAppend(0, (uint8_t *)tptr, pCompCol->len);
+    ASSERT(flen > 0);
+    flen += sizeof(TSCKSUM);
+    taosCalcChecksumAppend(0, (uint8_t *)tptr, flen);
 
-    toffset += pCompCol->len;
-    lsize += pCompCol->len;
-    tcol++;
+    if (ncol != 0) {
+      pCompCol->offset = toffset;
+      pCompCol->len = flen;
+      tcol++;
+    } else {
+      keyLen = flen;
+    }
+
+    toffset += flen;
+    lsize += flen;
   }
 
   pCompData->delimiter = TSDB_FILE_DELIMITER;
@@ -732,8 +750,8 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
   pCompBlock->offset = offset;
   pCompBlock->algorithm = pCfg->compression;
   pCompBlock->numOfRows = rowsToWrite;
-  pCompBlock->sversion = pHelper->tableInfo.sversion;
-  pCompBlock->len = (int32_t)lsize;
+  pCompBlock->len = lsize;
+  pCompBlock->keyLen = keyLen;
   pCompBlock->numOfSubBlocks = isSuperBlock ? 1 : 0;
   pCompBlock->numOfCols = nColsNotAllNull;
   pCompBlock->keyFirst = dataColsKeyFirst(pDataCols);
@@ -764,136 +782,6 @@ static int compareKeyBlock(const void *arg1, const void *arg2) {
   return 0;
 }
 
-static int tsdbMergeDataWithBlock(SRWHelper *pHelper, int blkIdx, SDataCols *pDataCols) {
-  // TODO: set pHelper->hasOldBlock
-  int        rowsWritten = 0;
-  SCompBlock compBlock = {0};
-  STsdbCfg * pCfg = &pHelper->pRepo->config;
-
-  ASSERT(pDataCols->numOfRows > 0);
-  TSKEY keyFirst = dataColsKeyFirst(pDataCols);
-
-  SCompIdx *pIdx = pHelper->pCompIdx + pHelper->tableInfo.tid;
-  ASSERT(blkIdx < pIdx->numOfBlocks);
-
-  // SCompBlock *pCompBlock = pHelper->pCompInfo->blocks + blkIdx;
-  ASSERT(blockAtIdx(pHelper, blkIdx)->numOfSubBlocks >= 1);
-  ASSERT(keyFirst >= blockAtIdx(pHelper, blkIdx)->keyFirst);
-  // ASSERT(compareKeyBlock((void *)&keyFirst, (void *)pCompBlock) == 0);
-
-  if (keyFirst > blockAtIdx(pHelper, blkIdx)->keyLast) {  // Merge with the last block by append
-    ASSERT(blockAtIdx(pHelper, blkIdx)->numOfRows < pCfg->minRowsPerFileBlock && blkIdx == pIdx->numOfBlocks - 1);
-    int defaultRowsToWrite = pCfg->maxRowsPerFileBlock * 4 / 5;  // TODO: make a interface
-
-    rowsWritten = MIN((defaultRowsToWrite - blockAtIdx(pHelper, blkIdx)->numOfRows), pDataCols->numOfRows);
-    if ((blockAtIdx(pHelper, blkIdx)->numOfSubBlocks < TSDB_MAX_SUBBLOCKS) &&
-        (blockAtIdx(pHelper, blkIdx)->numOfRows + rowsWritten < pCfg->minRowsPerFileBlock) &&
-        (pHelper->files.nLastF.fd) < 0) {
-      if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.lastF), pDataCols, rowsWritten, &compBlock, true, false) < 0)
-        goto _err;
-      if (tsdbAddSubBlock(pHelper, &compBlock, blkIdx, rowsWritten) < 0) goto _err;
-    } else {
-      // Load
-      if (tsdbLoadBlockData(pHelper, blockAtIdx(pHelper, blkIdx), NULL) < 0) goto _err;
-      ASSERT(pHelper->pDataCols[0]->numOfRows <= blockAtIdx(pHelper, blkIdx)->numOfRows);
-      // Merge
-      if (tdMergeDataCols(pHelper->pDataCols[0], pDataCols, rowsWritten) < 0) goto _err;
-      // Write
-      SFile *pWFile = NULL;
-      bool   isLast = false;
-      if (pHelper->pDataCols[0]->numOfRows >= pCfg->minRowsPerFileBlock) {
-        pWFile = &(pHelper->files.dataF);
-      } else {
-        isLast = true;
-        pWFile = (pHelper->files.nLastF.fd > 0) ? &(pHelper->files.nLastF) : &(pHelper->files.lastF);
-      }
-      if (tsdbWriteBlockToFile(pHelper, pWFile, pHelper->pDataCols[0], pHelper->pDataCols[0]->numOfRows, &compBlock,
-                               isLast, true) < 0)
-        goto _err;
-      if (tsdbUpdateSuperBlock(pHelper, &compBlock, blkIdx) < 0) goto _err;
-    }
-
-    ASSERT(pHelper->hasOldLastBlock);
-    pHelper->hasOldLastBlock = false;
-  } else {
-    // Key must overlap with the block
-    ASSERT(keyFirst <= blockAtIdx(pHelper, blkIdx)->keyLast);
-
-    TSKEY keyLimit = (blkIdx == pIdx->numOfBlocks - 1) ? INT64_MAX : blockAtIdx(pHelper, blkIdx + 1)->keyFirst - 1;
-
-    // rows1: number of rows must merge in this block
-    int rows1 =
-        tsdbGetRowsInRange(pDataCols, blockAtIdx(pHelper, blkIdx)->keyFirst, blockAtIdx(pHelper, blkIdx)->keyLast);
-    // rows2: max number of rows the block can have more
-    int rows2 = pCfg->maxRowsPerFileBlock - blockAtIdx(pHelper, blkIdx)->numOfRows;
-    // rows3: number of rows between this block and the next block
-    int rows3 = tsdbGetRowsInRange(pDataCols, blockAtIdx(pHelper, blkIdx)->keyFirst, keyLimit);
-
-    ASSERT(rows3 >= rows1);
-
-    if ((rows2 >= rows1) && (blockAtIdx(pHelper, blkIdx)->numOfSubBlocks < TSDB_MAX_SUBBLOCKS) &&
-        ((!blockAtIdx(pHelper, blkIdx)->last) ||
-         ((rows1 + blockAtIdx(pHelper, blkIdx)->numOfRows < pCfg->minRowsPerFileBlock) &&
-          (pHelper->files.nLastF.fd < 0)))) {
-      rowsWritten = rows1;
-      bool   isLast = false;
-      SFile *pFile = NULL;
-
-      if (blockAtIdx(pHelper, blkIdx)->last) {
-        isLast = true;
-        pFile = &(pHelper->files.lastF);
-      } else {
-        pFile = &(pHelper->files.dataF);
-      }
-
-      if (tsdbWriteBlockToFile(pHelper, pFile, pDataCols, rows1, &compBlock, isLast, false) < 0) goto _err;
-      if (tsdbAddSubBlock(pHelper, &compBlock, blkIdx, rowsWritten) < 0) goto _err;
-    } else {  // Load-Merge-Write
-      // Load
-      if (tsdbLoadBlockData(pHelper, blockAtIdx(pHelper, blkIdx), NULL) < 0) goto _err;
-      if (blockAtIdx(pHelper, blkIdx)->last) pHelper->hasOldLastBlock = false;
-
-      rowsWritten = rows3;
-
-      int iter1 = 0;  // iter over pHelper->pDataCols[0]
-      int iter2 = 0;  // iter over pDataCols
-      int round = 0;
-      // tdResetDataCols(pHelper->pDataCols[1]);
-      while (true) {
-        if (iter1 >= pHelper->pDataCols[0]->numOfRows && iter2 >= rows3) break;
-        tdMergeTwoDataCols(pHelper->pDataCols[1], pHelper->pDataCols[0], &iter1, pHelper->pDataCols[0]->numOfRows,
-                           pDataCols, &iter2, rowsWritten, pCfg->maxRowsPerFileBlock * 4 / 5);
-        ASSERT(pHelper->pDataCols[1]->numOfRows > 0);
-        if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.dataF), pHelper->pDataCols[1],
-                                 pHelper->pDataCols[1]->numOfRows, &compBlock, false, true) < 0)
-          goto _err;
-        if (round == 0) {
-          tsdbUpdateSuperBlock(pHelper, &compBlock, blkIdx);
-        } else {
-          tsdbInsertSuperBlock(pHelper, &compBlock, blkIdx);
-        }
-        round++;
-        blkIdx++;
-      }
-    }
-  }
-
-  return rowsWritten;
-
-_err:
-  return -1;
-}
-
-static int compTSKEY(const void *key1, const void *key2) {
-  if (*(TSKEY *)key1 > *(TSKEY *)key2) {
-    return 1;
-  } else if (*(TSKEY *)key1 == *(TSKEY *)key2) {
-    return 0;
-  } else {
-    return -1;
-  }
-}
-
 static int tsdbAdjustInfoSizeIfNeeded(SRWHelper *pHelper, size_t esize) {
   if (tsizeof((void *)pHelper->pCompInfo) <= esize) {
     size_t tsize = esize + sizeof(SCompBlock) * 16;
@@ -911,7 +799,7 @@ static int tsdbInsertSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int
   ASSERT(pCompBlock->numOfSubBlocks == 1);
 
   // Adjust memory if no more room
-  if (pIdx->len == 0) pIdx->len = sizeof(SCompData) + sizeof(TSCKSUM);
+  if (pIdx->len == 0) pIdx->len = sizeof(SCompInfo) + sizeof(TSCKSUM);
   if (tsdbAdjustInfoSizeIfNeeded(pHelper, pIdx->len + sizeof(SCompInfo)) < 0) goto _err;
 
   // Change the offset
@@ -925,16 +813,16 @@ static int tsdbInsertSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int
   if (tsize > 0) {
     ASSERT(sizeof(SCompInfo) + sizeof(SCompBlock) * (blkIdx + 1) < tsizeof(pHelper->pCompInfo));
     ASSERT(sizeof(SCompInfo) + sizeof(SCompBlock) * (blkIdx + 1) + tsize <= tsizeof(pHelper->pCompInfo));
-    memmove((void *)((char *)pHelper->pCompInfo + sizeof(SCompInfo) + sizeof(SCompBlock) * (blkIdx + 1)),
-            (void *)((char *)pHelper->pCompInfo + sizeof(SCompInfo) + sizeof(SCompBlock) * blkIdx), tsize);
+    memmove(POINTER_SHIFT(pHelper->pCompInfo, sizeof(SCompInfo) + sizeof(SCompBlock) * (blkIdx + 1)),
+            POINTER_SHIFT(pHelper->pCompInfo, sizeof(SCompInfo) + sizeof(SCompBlock) * blkIdx), tsize);
   }
   pHelper->pCompInfo->blocks[blkIdx] = *pCompBlock;
 
   pIdx->numOfBlocks++;
   pIdx->len += sizeof(SCompBlock);
   ASSERT(pIdx->len <= tsizeof(pHelper->pCompInfo));
-  pIdx->maxKey = pHelper->pCompInfo->blocks[pIdx->numOfBlocks - 1].keyLast;
-  pIdx->hasLast = pHelper->pCompInfo->blocks[pIdx->numOfBlocks - 1].last;
+  pIdx->maxKey = blockAtIdx(pHelper, pIdx->numOfBlocks - 1)->keyLast;
+  pIdx->hasLast = blockAtIdx(pHelper, pIdx->numOfBlocks - 1)->last;
 
   if (pIdx->numOfBlocks > 1) {
     ASSERT(pHelper->pCompInfo->blocks[0].keyLast < pHelper->pCompInfo->blocks[1].keyFirst);
@@ -1048,8 +936,8 @@ static int tsdbUpdateSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int
   if (pSCompBlock->numOfSubBlocks > 1) {
     size_t tsize = pIdx->len - (pSCompBlock->offset + pSCompBlock->len);
     if (tsize > 0) {
-      memmove((void *)((char *)(pHelper->pCompInfo) + pSCompBlock->offset),
-              (void *)((char *)(pHelper->pCompInfo) + pSCompBlock->offset + pSCompBlock->len), tsize);
+      memmove(POINTER_SHIFT(pHelper->pCompInfo, pSCompBlock->offset),
+              POINTER_SHIFT(pHelper->pCompInfo, pSCompBlock->offset + pSCompBlock->len), tsize);
     }
 
     for (int i = blkIdx + 1; i < pIdx->numOfBlocks; i++) {
@@ -1062,8 +950,8 @@ static int tsdbUpdateSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int
 
   *pSCompBlock = *pCompBlock;
 
-  pIdx->maxKey = pHelper->pCompInfo->blocks[pIdx->numOfBlocks - 1].keyLast;
-  pIdx->hasLast = pHelper->pCompInfo->blocks[pIdx->numOfBlocks - 1].last;
+  pIdx->maxKey = blockAtIdx(pHelper, pIdx->numOfBlocks - 1)->keyLast;
+  pIdx->hasLast = blockAtIdx(pHelper, pIdx->numOfBlocks - 1)->last;
 
   tsdbDebug("vgId:%d tid:%d a super block is updated at index %d", REPO_ID(pHelper->pRepo), pHelper->tableInfo.tid,
             blkIdx);
@@ -1071,30 +959,6 @@ static int tsdbUpdateSuperBlock(SRWHelper *pHelper, SCompBlock *pCompBlock, int
   return 0;
 }
 
-// Get the number of rows in range [minKey, maxKey]
-static int tsdbGetRowsInRange(SDataCols *pDataCols, TSKEY minKey, TSKEY maxKey) {
-  if (pDataCols->numOfRows == 0) return 0;
-
-  ASSERT(minKey <= maxKey);
-  TSKEY keyFirst = dataColsKeyFirst(pDataCols);
-  TSKEY keyLast = dataColsKeyLast(pDataCols);
-  ASSERT(keyFirst <= keyLast);
-
-  if (minKey > keyLast || maxKey < keyFirst) return 0;
-
-  void *ptr1 = taosbsearch((void *)&minKey, (void *)pDataCols->cols[0].pData, pDataCols->numOfRows, sizeof(TSKEY),
-                           compTSKEY, TD_GE);
-  ASSERT(ptr1 != NULL);
-
-  void *ptr2 = taosbsearch((void *)&maxKey, (void *)pDataCols->cols[0].pData, pDataCols->numOfRows, sizeof(TSKEY),
-                           compTSKEY, TD_LE);
-  ASSERT(ptr2 != NULL);
-
-  if ((TSKEY *)ptr2 - (TSKEY *)ptr1 < 0) return 0;
-
-  return ((TSKEY *)ptr2 - (TSKEY *)ptr1) + 1;
-}
-
 static void tsdbResetHelperFileImpl(SRWHelper *pHelper) {
   memset((void *)&pHelper->files, 0, sizeof(pHelper->files));
   pHelper->files.fid = -1;
@@ -1250,7 +1114,8 @@ static int tsdbLoadColData(SRWHelper *pHelper, SFile *pFile, SCompBlock *pCompBl
     return -1;
   }
 
-  if (lseek(pFile->fd, pCompCol->offset, SEEK_SET) < 0) {
+  int64_t offset = pCompBlock->offset + TSDB_GET_COMPCOL_LEN(pCompBlock->numOfCols) + pCompCol->offset;
+  if (lseek(pFile->fd, offset, SEEK_SET) < 0) {
     tsdbError("vgId:%d failed to lseek file %s since %s", REPO_ID(pHelper->pRepo), pFile->fname, strerror(errno));
     terrno = TAOS_SYSTEM_ERROR(errno);
     return -1;
@@ -1276,10 +1141,15 @@ static int tsdbLoadColData(SRWHelper *pHelper, SFile *pFile, SCompBlock *pCompBl
 
 static int tsdbLoadBlockDataColsImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDataCols *pDataCols, int16_t *colIds, int numOfColIds) {
   ASSERT(pCompBlock->numOfSubBlocks <= 1);
+  ASSERT(colIds[0] == 0);
 
-  SFile *   pFile = (pCompBlock->last) ? &(pHelper->files.lastF) : &(pHelper->files.dataF);
+  SFile *  pFile = (pCompBlock->last) ? &(pHelper->files.lastF) : &(pHelper->files.dataF);
+  SCompCol compCol = {0};
 
-  if (tsdbLoadCompData(pHelper, pCompBlock, NULL) < 0) goto _err;
+  // If only load timestamp column, no need to load SCompData part
+  if (numOfColIds > 1 && tsdbLoadCompData(pHelper, pCompBlock, NULL) < 0) goto _err;
+
+  pDataCols->numOfRows = pCompBlock->numOfRows;
 
   int dcol = 0;
   int ccol = 0;
@@ -1298,23 +1168,31 @@ static int tsdbLoadBlockDataColsImpl(SRWHelper *pHelper, SCompBlock *pCompBlock,
 
     ASSERT(pDataCol->colId == colId);
 
-    while (ccol < pCompBlock->numOfCols) {
-      pCompCol = &pHelper->pCompData->cols[ccol];
-      if (pCompCol->colId >= colId) break;
-      ccol++;
-    }
+    if (colId == 0) {  // load the key row
+      compCol.colId = colId;
+      compCol.len = pCompBlock->keyLen;
+      compCol.type = pDataCol->type;
+      compCol.offset = TSDB_KEY_COL_OFFSET;
+      pCompCol = &compCol;
+    } else {  // load non-key rows
+      while (ccol < pCompBlock->numOfCols) {
+        pCompCol = &pHelper->pCompData->cols[ccol];
+        if (pCompCol->colId >= colId) break;
+        ccol++;
+      }
 
-    if (ccol >= pCompBlock->numOfCols || pCompCol->colId > colId) {
-      dataColSetNEleNull(pDataCol, pCompBlock->numOfRows, pDataCols->maxPoints);
-      dcol++;
-      continue;
-    }
+      if (ccol >= pCompBlock->numOfCols || pCompCol->colId > colId) {
+        dataColSetNEleNull(pDataCol, pCompBlock->numOfRows, pDataCols->maxPoints);
+        dcol++;
+        continue;
+      }
 
-    ASSERT(pCompCol->colId == pDataCol->colId);
+      ASSERT(pCompCol->colId == pDataCol->colId);
+    }
 
     if (tsdbLoadColData(pHelper, pFile, pCompBlock, pCompCol, pDataCol) < 0) goto _err;
     dcol++;
-    ccol++;
+    if (colId != 0) ccol++;
   }
 
   return 0;
@@ -1362,8 +1240,8 @@ static int tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDa
   pDataCols->numOfRows = pCompBlock->numOfRows;
 
   // Recover the data
-  int ccol = 0;
-  int dcol = 0;
+  int ccol = 0;  // loop iter for SCompCol object
+  int dcol = 0;  // loop iter for SDataCols object
   while (dcol < pDataCols->numOfCols) {
     SDataCol *pDataCol = &(pDataCols->cols[dcol]);
     if (ccol >= pCompData->numOfCols) {
@@ -1373,12 +1251,23 @@ static int tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDa
       continue;
     }
 
-    SCompCol *pCompCol = &(pCompData->cols[ccol]);
+    int16_t tcolId = 0;
+    int32_t toffset = TSDB_KEY_COL_OFFSET;
+    int32_t tlen = pCompBlock->keyLen;
 
-    if (pCompCol->colId == pDataCol->colId) {
+    if (dcol != 0) {
+      SCompCol *pCompCol = &(pCompData->cols[ccol]);
+      tcolId = pCompCol->colId;
+      toffset = pCompCol->offset;
+      tlen = pCompCol->len;
+    } else {
+      ASSERT(pDataCol->colId == tcolId);
+    }
+
+    if (tcolId == pDataCol->colId) {
       if (pCompBlock->algorithm == TWO_STAGE_COMP) {
         int zsize = pDataCol->bytes * pCompBlock->numOfRows + COMP_OVERFLOW_BYTES;
-        if (pCompCol->type == TSDB_DATA_TYPE_BINARY || pCompCol->type == TSDB_DATA_TYPE_NCHAR) {
+        if (pDataCol->type == TSDB_DATA_TYPE_BINARY || pDataCol->type == TSDB_DATA_TYPE_NCHAR) {
           zsize += (sizeof(VarDataLenT) * pCompBlock->numOfRows);
         }
         pHelper->compBuffer = trealloc(pHelper->compBuffer, zsize);
@@ -1387,16 +1276,16 @@ static int tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDa
           goto _err;
         }
       }
-      if (tsdbCheckAndDecodeColumnData(pDataCol, (char *)pCompData + tsize + pCompCol->offset, pCompCol->len,
-                                       pCompBlock->algorithm, pCompBlock->numOfRows, pDataCols->maxPoints,
-                                       pHelper->compBuffer, tsizeof(pHelper->compBuffer)) < 0) {
-        tsdbError("vgId:%d file %s is broken at column %d offset %" PRId64, REPO_ID(pHelper->pRepo), pFile->fname,
-                  pCompCol->colId, (int64_t)pCompCol->offset);
+      if (tsdbCheckAndDecodeColumnData(pDataCol, (char *)pCompData + tsize + toffset, tlen, pCompBlock->algorithm,
+                                       pCompBlock->numOfRows, pDataCols->maxPoints, pHelper->compBuffer,
+                                       tsizeof(pHelper->compBuffer)) < 0) {
+        tsdbError("vgId:%d file %s is broken at column %d block offset %" PRId64 " column offset %d",
+                  REPO_ID(pHelper->pRepo), pFile->fname, tcolId, (int64_t)pCompBlock->offset, toffset);
         goto _err;
       }
+      if (dcol != 0) ccol++;
       dcol++;
-      ccol++;
-    } else if (pCompCol->colId < pDataCol->colId) {
+    } else if (tcolId < pDataCol->colId) {
       ccol++;
     } else {
       // Set current column as NULL and forward
@@ -1442,3 +1331,250 @@ static void *tsdbDecodeSCompIdx(void *buf, SCompIdx *pIdx) {
 
   return buf;
 }
+
+static int tsdbProcessAppendCommit(SRWHelper *pHelper, SCommitIter *pCommitIter, SDataCols *pDataCols, TSKEY maxKey) {
+  STsdbCfg * pCfg = &(pHelper->pRepo->config);
+  STable *   pTable = pCommitIter->pTable;
+  SCompIdx * pIdx = pHelper->pCompIdx + TABLE_TID(pTable);
+  TSKEY      keyFirst = tsdbNextIterKey(pCommitIter->pIter);
+  int        defaultRowsInBlock = pCfg->maxRowsPerFileBlock * 4 / 5;
+  SCompBlock compBlock = {0};
+
+  ASSERT(pIdx->len <= 0 || keyFirst > pIdx->maxKey);
+  if (pIdx->hasLast) {  // append to with last block
+    ASSERT(pIdx->len > 0);
+    SCompBlock *pCompBlock = blockAtIdx(pHelper, pIdx->numOfBlocks - 1);
+    ASSERT(pCompBlock->last && pCompBlock->numOfRows < pCfg->minRowsPerFileBlock);
+    tdResetDataCols(pDataCols);
+    int rowsRead = tsdbLoadDataFromCache(pTable, pCommitIter->pIter, maxKey, defaultRowsInBlock - pCompBlock->numOfRows,
+                                         pDataCols, NULL, 0);
+    ASSERT(rowsRead > 0 && rowsRead == pDataCols->numOfRows);
+    if (rowsRead + pCompBlock->numOfRows < pCfg->minRowsPerFileBlock &&
+        pCompBlock->numOfSubBlocks < TSDB_MAX_SUBBLOCKS && !TSDB_NLAST_FILE_OPENED(pHelper)) {
+      if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.lastF), pDataCols, &compBlock, true, false) < 0) return -1;
+      if (tsdbAddSubBlock(pHelper, &compBlock, pIdx->numOfBlocks - 1, rowsRead) < 0) return -1;
+    } else {
+      if (tsdbLoadBlockData(pHelper, pCompBlock, NULL) < 0) return -1;
+      ASSERT(pHelper->pDataCols[0]->numOfRows == pCompBlock->numOfRows);
+
+      if (tdMergeDataCols(pHelper->pDataCols[0], pDataCols, pDataCols->numOfRows) < 0) return -1;
+      ASSERT(pHelper->pDataCols[0]->numOfRows == pCompBlock->numOfRows + pDataCols->numOfRows);
+
+      if (tsdbWriteBlockToProperFile(pHelper, pHelper->pDataCols[0], &compBlock) < 0) return -1;
+      if (tsdbUpdateSuperBlock(pHelper, &compBlock, pIdx->numOfBlocks - 1) < 0) return -1;
+    }
+
+    if (pHelper->hasOldLastBlock) pHelper->hasOldLastBlock = false;
+  } else {
+    ASSERT(!pHelper->hasOldLastBlock);
+    tdResetDataCols(pDataCols);
+    int rowsRead = tsdbLoadDataFromCache(pTable, pCommitIter->pIter, maxKey, defaultRowsInBlock, pDataCols, NULL, 0);
+    ASSERT(rowsRead > 0 && rowsRead == pDataCols->numOfRows);
+
+    if (tsdbWriteBlockToProperFile(pHelper, pDataCols, &compBlock) < 0) return -1;
+    if (tsdbInsertSuperBlock(pHelper, &compBlock, pIdx->numOfBlocks) < 0) return -1;
+  }
+
+  return 0;
+}
+
+static int tsdbProcessMergeCommit(SRWHelper *pHelper, SCommitIter *pCommitIter, SDataCols *pDataCols, TSKEY maxKey,
+                                  int *blkIdx) {
+  STsdbCfg * pCfg = &(pHelper->pRepo->config);
+  STable *   pTable = pCommitIter->pTable;
+  SCompIdx * pIdx = pHelper->pCompIdx + TABLE_TID(pTable);
+  SCompBlock compBlock = {0};
+  TSKEY      keyFirst = tsdbNextIterKey(pCommitIter->pIter);
+  int        defaultRowsInBlock = pCfg->maxRowsPerFileBlock * 4 / 5;
+  SDataCols *pDataCols0 = pHelper->pDataCols[0];
+
+  SSkipListIterator slIter = {0};
+
+  ASSERT(keyFirst <= pIdx->maxKey);
+
+  SCompBlock *pCompBlock = taosbsearch((void *)(&keyFirst), (void *)blockAtIdx(pHelper, *blkIdx),
+                                       pIdx->numOfBlocks - *blkIdx, sizeof(SCompBlock), compareKeyBlock, TD_GE);
+  ASSERT(pCompBlock != NULL);
+  int tblkIdx = TSDB_GET_COMPBLOCK_IDX(pHelper, pCompBlock);
+
+  if (pCompBlock->last) {
+    ASSERT(pCompBlock->numOfRows < pCfg->minRowsPerFileBlock && tblkIdx == pIdx->numOfBlocks - 1);
+    int16_t colId = 0;
+    slIter = *(pCommitIter->pIter);
+    if (tsdbLoadBlockDataCols(pHelper, pCompBlock, NULL, &colId, 1) < 0) return -1;
+    ASSERT(pDataCols0->numOfRows == pCompBlock->numOfRows);
+
+    int rows1 = defaultRowsInBlock - pCompBlock->numOfRows;
+    int rows2 =
+        tsdbLoadDataFromCache(pTable, &slIter, maxKey, rows1, NULL, pDataCols0->cols[0].pData, pDataCols0->numOfRows);
+    if (rows2 == 0) {  // all data filtered out
+      *(pCommitIter->pIter) = slIter;
+    } else {
+      if (rows1 + rows2 < pCfg->minRowsPerFileBlock && pCompBlock->numOfSubBlocks < TSDB_MAX_SUBBLOCKS &&
+          !TSDB_NLAST_FILE_OPENED(pHelper)) {
+        tdResetDataCols(pDataCols);
+        int rowsRead = tsdbLoadDataFromCache(pTable, pCommitIter->pIter, maxKey, rows1, pDataCols,
+                                             pDataCols0->cols[0].pData, pDataCols0->numOfRows);
+        ASSERT(rowsRead == rows2 && rowsRead == pDataCols->numOfRows);
+        if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.lastF), pDataCols, &compBlock, true, false) < 0) return -1;
+        if (tsdbAddSubBlock(pHelper, &compBlock, tblkIdx, rowsRead) < 0) return -1;
+        tblkIdx++;
+      } else {
+        if (tsdbLoadBlockData(pHelper, pCompBlock, NULL) < 0) return -1;
+        int round = 0;
+        int dIter = 0;
+        while (true) {
+          tdResetDataCols(pDataCols);
+          int rowsRead =
+              tsdbLoadAndMergeFromCache(pDataCols0, &dIter, pCommitIter, pDataCols, maxKey, defaultRowsInBlock);
+          if (rowsRead == 0) break;
+
+          if (tsdbWriteBlockToProperFile(pHelper, pDataCols, &compBlock) < 0) return -1;
+          if (round == 0) {
+            if (tsdbUpdateSuperBlock(pHelper, &compBlock, tblkIdx) < 0) return -1;
+          } else {
+            if (tsdbInsertSuperBlock(pHelper, &compBlock, tblkIdx) < 0) return -1;
+          }
+
+          tblkIdx++;
+          round++;
+        }
+      }
+      if (pHelper->hasOldLastBlock) pHelper->hasOldLastBlock = false;
+    }
+  } else {
+    TSKEY keyLimit = (tblkIdx == pIdx->numOfBlocks - 1) ? maxKey : (pCompBlock[1].keyFirst - 1);
+    TSKEY blkKeyFirst = pCompBlock->keyFirst;
+    TSKEY blkKeyLast = pCompBlock->keyLast;
+
+    if (keyFirst < blkKeyFirst) {
+      while (true) {
+        tdResetDataCols(pDataCols);
+        int rowsRead =
+            tsdbLoadDataFromCache(pTable, pCommitIter->pIter, blkKeyFirst - 1, defaultRowsInBlock, pDataCols, NULL, 0);
+        if (rowsRead == 0) break;
+
+        ASSERT(rowsRead == pDataCols->numOfRows);
+        if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.dataF), pDataCols, &compBlock, false, true) < 0) return -1;
+        if (tsdbInsertSuperBlock(pHelper, &compBlock, tblkIdx) < 0) return -1;
+        tblkIdx++;
+      }
+    } else {
+      ASSERT(keyFirst <= blkKeyLast);
+      int16_t colId = 0;
+      if (tsdbLoadBlockDataCols(pHelper, pCompBlock, NULL, &colId, 1) < 0) return -1;
+      ASSERT(pDataCols0->numOfRows == pCompBlock->numOfRows);
+
+      slIter = *(pCommitIter->pIter);
+      int rows1 = (pCfg->maxRowsPerFileBlock - pCompBlock->numOfRows);
+      int rows2 = tsdbLoadDataFromCache(pTable, &slIter, blkKeyLast, INT_MAX, NULL, pDataCols0->cols[0].pData,
+                                        pDataCols0->numOfRows);
+
+      if (rows2 == 0) {  // all filtered out
+        *(pCommitIter->pIter) = slIter;
+      } else {
+        int rows3 = tsdbLoadDataFromCache(pTable, &slIter, keyLimit, INT_MAX, NULL, NULL, 0) + rows2;
+        ASSERT(rows3 >= rows2);
+
+        if (pCompBlock->numOfSubBlocks < TSDB_MAX_SUBBLOCKS && rows1 >= rows2) {
+          int rows = (rows1 >= rows3) ? rows3 : rows2;
+          tdResetDataCols(pDataCols);
+          int rowsRead = tsdbLoadDataFromCache(pTable, pCommitIter->pIter, keyLimit, rows, pDataCols,
+                                               pDataCols0->cols[0].pData, pDataCols0->numOfRows);
+          ASSERT(rowsRead == rows && rowsRead == pDataCols->numOfRows);
+          if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.dataF), pDataCols, &compBlock, false, false) < 0)
+            return -1;
+          if (tsdbAddSubBlock(pHelper, &compBlock, tblkIdx, rowsRead) < 0) return -1;
+          tblkIdx++;
+        } else {
+          if (tsdbLoadBlockData(pHelper, pCompBlock, NULL) < 0) return -1;
+          int round = 0;
+          int dIter = 0;
+          while (true) {
+            int rowsRead =
+                tsdbLoadAndMergeFromCache(pDataCols0, &dIter, pCommitIter, pDataCols, keyLimit, defaultRowsInBlock);
+            if (rowsRead == 0) break;
+
+            if (tsdbWriteBlockToFile(pHelper, &(pHelper->files.dataF), pDataCols, &compBlock, false, true) < 0)
+              return -1;
+            if (round == 0) {
+              if (tsdbUpdateSuperBlock(pHelper, &compBlock, tblkIdx) < 0) return -1;
+            } else {
+              if (tsdbInsertSuperBlock(pHelper, &compBlock, tblkIdx) < 0) return -1;
+            }
+
+            round++;
+            tblkIdx++;
+          }
+        }
+      }
+    }
+  }
+
+  *blkIdx = tblkIdx;
+  return 0;
+}
+
+static int tsdbLoadAndMergeFromCache(SDataCols *pDataCols, int *iter, SCommitIter *pCommitIter, SDataCols *pTarget,
+                                     TSKEY maxKey, int maxRows) {
+  int       numOfRows = 0;
+  TSKEY     key1 = INT64_MAX;
+  TSKEY     key2 = INT64_MAX;
+  STSchema *pSchema = NULL;
+
+  ASSERT(maxRows > 0 && dataColsKeyLast(pDataCols) <= maxKey);
+  tdResetDataCols(pTarget);
+
+  while (true) {
+    key1 = (*iter >= pDataCols->numOfRows) ? INT64_MAX : dataColsKeyAt(pDataCols, *iter);
+    SDataRow row = tsdbNextIterRow(pCommitIter->pIter);
+    key2 = (row == NULL || dataRowKey(row) > maxKey) ? INT64_MAX : dataRowKey(row);
+
+    if (key1 == INT64_MAX && key2 == INT64_MAX) break;
+
+    if (key1 <= key2) {
+      for (int i = 0; i < pDataCols->numOfCols; i++) {
+        dataColAppendVal(pTarget->cols + i, tdGetColDataOfRow(pDataCols->cols + i, *iter), pTarget->numOfRows,
+                         pTarget->maxPoints);
+      }
+      pTarget->numOfRows++;
+      (*iter)++;
+      if (key1 == key2) tSkipListIterNext(pCommitIter->pIter);
+    } else {
+      if (pSchema == NULL || schemaVersion(pSchema) != dataRowVersion(row)) {
+        pSchema = tsdbGetTableSchemaImpl(pCommitIter->pTable, false, false, dataRowVersion(row));
+        ASSERT(pSchema != NULL);
+      }
+
+      tdAppendDataRowToDataCol(row, pSchema, pTarget);
+      tSkipListIterNext(pCommitIter->pIter);
+    }
+
+    numOfRows++;
+    if (numOfRows >= maxRows) break;
+    ASSERT(numOfRows == pTarget->numOfRows && numOfRows <= pTarget->maxPoints);
+  }
+
+  return numOfRows;
+}
+
+static int tsdbWriteBlockToProperFile(SRWHelper *pHelper, SDataCols *pDataCols, SCompBlock *pCompBlock) {
+  STsdbCfg *pCfg = &(pHelper->pRepo->config);
+  SFile *   pFile = NULL;
+  bool      isLast = false;
+
+  ASSERT(pDataCols->numOfRows > 0);
+
+  if (pDataCols->numOfRows >= pCfg->minRowsPerFileBlock) {
+    pFile = &(pHelper->files.dataF);
+  } else {
+    isLast = true;
+    pFile = TSDB_NLAST_FILE_OPENED(pHelper) ? &(pHelper->files.nLastF) : &(pHelper->files.lastF);
+  }
+
+  ASSERT(pFile->fd > 0);
+
+  if (tsdbWriteBlockToFile(pHelper, pFile, pDataCols, pCompBlock, isLast, true) < 0) return -1;
+
+  return 0;
+}
\ No newline at end of file
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index a4e0151f89..c43d2636c2 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -110,9 +110,10 @@ typedef struct STsdbQueryHandle {
   SFileGroupIter fileIter;
   SRWHelper      rhelper;
   STableBlockInfo* pDataBlockInfo;
+  int32_t        allocSize;        // allocated data block size
   SMemTable*     mem;              // mem-table
   SMemTable*     imem;             // imem-table, acquired from snapshot
-  
+  SArray*        defaultLoadColumn;// default load column
   SDataBlockLoadInfo dataBlockLoadInfo; /* record current block load information */
   SLoadCompBlockInfo compBlockLoadInfo; /* record current compblock information in SQuery */
 } STsdbQueryHandle;
@@ -136,6 +137,34 @@ static void tsdbInitCompBlockLoadInfo(SLoadCompBlockInfo* pCompBlockLoadInfo) {
   pCompBlockLoadInfo->fileId = -1;
 }
 
+static SArray* getColumnIdList(STsdbQueryHandle* pQueryHandle) {
+  size_t numOfCols = QH_GET_NUM_OF_COLS(pQueryHandle);
+  assert(numOfCols <= TSDB_MAX_COLUMNS);
+
+  SArray* pIdList = taosArrayInit(numOfCols, sizeof(int16_t));
+  for (int32_t i = 0; i < numOfCols; ++i) {
+    SColumnInfoData* pCol = taosArrayGet(pQueryHandle->pColumns, i);
+    taosArrayPush(pIdList, &pCol->info.colId);
+  }
+
+  return pIdList;
+}
+
+static SArray* getDefaultLoadColumns(STsdbQueryHandle* pQueryHandle, bool loadTS) {
+  SArray* pLocalIdList = getColumnIdList(pQueryHandle);
+
+  // check if the primary time stamp column needs to load
+  int16_t colId = *(int16_t*)taosArrayGet(pLocalIdList, 0);
+
+  // the primary timestamp column does not be included in the the specified load column list, add it
+  if (loadTS && colId != 0) {
+    int16_t columnId = 0;
+    taosArrayInsert(pLocalIdList, 0, &columnId);
+  }
+
+  return pLocalIdList;
+}
+
 TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STableGroupInfo* groupList, void* qinfo) {
   STsdbQueryHandle* pQueryHandle = calloc(1, sizeof(STsdbQueryHandle));
   pQueryHandle->order       = pCond->order;
@@ -148,8 +177,12 @@ TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STab
   pQueryHandle->activeIndex = 0;   // current active table index
   pQueryHandle->qinfo       = qinfo;
   pQueryHandle->outputCapacity = ((STsdbRepo*)tsdb)->config.maxRowsPerFileBlock;
-  
-  tsdbInitReadHelper(&pQueryHandle->rhelper, (STsdbRepo*) tsdb);
+  pQueryHandle->allocSize   = 0;
+
+  if (tsdbInitReadHelper(&pQueryHandle->rhelper, (STsdbRepo*) tsdb) != 0) {
+    free(pQueryHandle);
+    return NULL;
+  }
   tsdbTakeMemSnapshot(pQueryHandle->pTsdb, &pQueryHandle->mem, &pQueryHandle->imem);
 
   size_t sizeOfGroup = taosArrayGetSize(groupList->pGroupList);
@@ -195,7 +228,9 @@ TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STab
       taosArrayPush(pQueryHandle->pTableCheckInfo, &info);
     }
   }
-  
+
+  pQueryHandle->defaultLoadColumn = getDefaultLoadColumns(pQueryHandle, true);
+
   tsdbDebug("%p total numOfTable:%zu in query", pQueryHandle, taosArrayGetSize(pQueryHandle->pTableCheckInfo));
 
   tsdbInitDataBlockLoadInfo(&pQueryHandle->dataBlockLoadInfo);
@@ -206,11 +241,11 @@ TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STab
 
 TsdbQueryHandleT tsdbQueryLastRow(TSDB_REPO_T *tsdb, STsdbQueryCond *pCond, STableGroupInfo *groupList, void* qinfo) {
   STsdbQueryHandle *pQueryHandle = (STsdbQueryHandle*) tsdbQueryTables(tsdb, pCond, groupList, qinfo);
-  
-  pQueryHandle->type = TSDB_QUERY_TYPE_LAST;
-  pQueryHandle->order = TSDB_ORDER_DESC;
-  
-  changeQueryHandleForLastrowQuery(pQueryHandle);
+  if (pQueryHandle != NULL) {
+    pQueryHandle->type = TSDB_QUERY_TYPE_LAST;
+    pQueryHandle->order = TSDB_ORDER_DESC;
+    changeQueryHandleForLastrowQuery(pQueryHandle);
+  }
   return pQueryHandle;
 }
 
@@ -232,9 +267,10 @@ SArray* tsdbGetQueriedTableList(TsdbQueryHandleT *pHandle) {
 
 TsdbQueryHandleT tsdbQueryRowsInExternalWindow(TSDB_REPO_T *tsdb, STsdbQueryCond* pCond, STableGroupInfo *groupList, void* qinfo) {
   STsdbQueryHandle *pQueryHandle = (STsdbQueryHandle*) tsdbQueryTables(tsdb, pCond, groupList, qinfo);
-  
-  pQueryHandle->type = TSDB_QUERY_TYPE_EXTERNAL;
-  changeQueryHandleForInterpQuery(pQueryHandle);
+  if (pQueryHandle != NULL) {
+    pQueryHandle->type = TSDB_QUERY_TYPE_EXTERNAL;
+    changeQueryHandleForInterpQuery(pQueryHandle);
+  }
   return pQueryHandle;
 }
 
@@ -546,33 +582,7 @@ static int32_t getFileCompInfo(STsdbQueryHandle* pQueryHandle, int32_t* numOfBlo
                     .tid = (_checkInfo)->tableId.tid,                                  \
                     .uid = (_checkInfo)->tableId.uid})
 
-static SArray* getColumnIdList(STsdbQueryHandle* pQueryHandle) {
-  size_t numOfCols = QH_GET_NUM_OF_COLS(pQueryHandle);
-  assert(numOfCols <= TSDB_MAX_COLUMNS);
-  
-  SArray* pIdList = taosArrayInit(numOfCols, sizeof(int16_t));
-  for (int32_t i = 0; i < numOfCols; ++i) {
-    SColumnInfoData* pCol = taosArrayGet(pQueryHandle->pColumns, i);
-    taosArrayPush(pIdList, &pCol->info.colId);
-  }
-  
-  return pIdList;
-}
 
-static SArray* getDefaultLoadColumns(STsdbQueryHandle* pQueryHandle, bool loadTS) {
-  SArray* pLocalIdList = getColumnIdList(pQueryHandle);
-  
-  // check if the primary time stamp column needs to load
-  int16_t colId = *(int16_t*)taosArrayGet(pLocalIdList, 0);
-  
-  // the primary timestamp column does not be included in the the specified load column list, add it
-  if (loadTS && colId != 0) {
-    int16_t columnId = 0;
-    taosArrayInsert(pLocalIdList, 0, &columnId);
-  }
-  
-  return pLocalIdList;
-}
 
 static bool doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock, STableCheckInfo* pCheckInfo) {
   STsdbRepo *pRepo = pQueryHandle->pTsdb;
@@ -584,8 +594,6 @@ static bool doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlo
   data->uid = pCheckInfo->pTableObj->tableId.uid;
 
   bool    blockLoaded = false;
-  SArray* sa = getDefaultLoadColumns(pQueryHandle, true);
-
   int64_t st = taosGetTimestampUs();
 
   if (pCheckInfo->pDataCols == NULL) {
@@ -613,7 +621,6 @@ static bool doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlo
   assert(pCols->numOfRows != 0 && pCols->numOfRows <= pBlock->numOfRows);
 
   pBlock->numOfRows = pCols->numOfRows;
-  taosArrayDestroy(sa);
   tfree(data);
 
   int64_t et = taosGetTimestampUs() - st;
@@ -656,12 +663,8 @@ static void handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBlock*
       return;
     }
   
-    SArray* sa = getDefaultLoadColumns(pQueryHandle, true);
-  
     doLoadFileDataBlock(pQueryHandle, pBlock, pCheckInfo);
-    doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock, sa);
-    taosArrayDestroy(sa);
-    
+    doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock, pQueryHandle->defaultLoadColumn);
   } else {
     /*
      * no data in cache, only load data from file
@@ -681,14 +684,12 @@ static void handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBlock*
 }
 
 static bool loadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock, STableCheckInfo* pCheckInfo) {
-  SArray*        sa = getDefaultLoadColumns(pQueryHandle, true);
   SQueryFilePos* cur = &pQueryHandle->cur;
 
   if (ASCENDING_TRAVERSE(pQueryHandle->order)) {
     // query ended in current block
     if (pQueryHandle->window.ekey < pBlock->keyLast || pCheckInfo->lastKey > pBlock->keyFirst) {
       if (!doLoadFileDataBlock(pQueryHandle, pBlock, pCheckInfo)) {
-        taosArrayDestroy(sa);
         return false;
       }
 
@@ -702,7 +703,7 @@ static bool loadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock
         cur->pos = 0;
       }
       
-      doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock, sa);
+      doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock, pQueryHandle->defaultLoadColumn);
     } else {  // the whole block is loaded in to buffer
       handleDataMergeIfNeeded(pQueryHandle, pBlock, pCheckInfo);
     }
@@ -719,13 +720,12 @@ static bool loadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock
         cur->pos = pBlock->numOfRows - 1;
       }
       
-      doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock, sa);
+      doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock, pQueryHandle->defaultLoadColumn);
     } else {
       handleDataMergeIfNeeded(pQueryHandle, pBlock, pCheckInfo);
     }
   }
 
-  taosArrayDestroy(sa);
   return pQueryHandle->realNumOfRows > 0;
 }
 
@@ -1241,22 +1241,30 @@ static int32_t dataBlockOrderCompar(const void* pLeft, const void* pRight, void*
   STableBlockInfo* pRightBlockInfoEx = &pSupporter->pDataBlockInfo[rightTableIndex][rightTableBlockIndex];
 
   //    assert(pLeftBlockInfoEx->compBlock->offset != pRightBlockInfoEx->compBlock->offset);
+#if 0	// TODO: temporarily comment off requested by Dr. Liao
   if (pLeftBlockInfoEx->compBlock->offset == pRightBlockInfoEx->compBlock->offset &&
       pLeftBlockInfoEx->compBlock->last == pRightBlockInfoEx->compBlock->last) {
     tsdbError("error in header file, two block with same offset:%" PRId64, (int64_t)pLeftBlockInfoEx->compBlock->offset);
   }
+#endif 
 
   return pLeftBlockInfoEx->compBlock->offset > pRightBlockInfoEx->compBlock->offset ? 1 : -1;
 }
 
 static int32_t createDataBlocksInfo(STsdbQueryHandle* pQueryHandle, int32_t numOfBlocks, int32_t* numOfAllocBlocks) {
-  char* tmp = realloc(pQueryHandle->pDataBlockInfo, sizeof(STableBlockInfo) * numOfBlocks);
-  if (tmp == NULL) {
-    return TSDB_CODE_TDB_OUT_OF_MEMORY;
+  size_t size = sizeof(STableBlockInfo) * numOfBlocks;
+
+  if (pQueryHandle->allocSize < size) {
+    pQueryHandle->allocSize = size;
+    char* tmp = realloc(pQueryHandle->pDataBlockInfo, pQueryHandle->allocSize);
+    if (tmp == NULL) {
+      return TSDB_CODE_TDB_OUT_OF_MEMORY;
+    }
+
+    pQueryHandle->pDataBlockInfo = (STableBlockInfo*) tmp;
   }
 
-  pQueryHandle->pDataBlockInfo = (STableBlockInfo*) tmp;
-  memset(pQueryHandle->pDataBlockInfo, 0, sizeof(STableBlockInfo) * numOfBlocks);
+  memset(pQueryHandle->pDataBlockInfo, 0, size);
   *numOfAllocBlocks = numOfBlocks;
 
   int32_t numOfTables = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
@@ -1492,9 +1500,8 @@ bool tsdbNextDataBlock(TsdbQueryHandleT* pHandle) {
       return false;
     }
     
-    SArray* sa = getDefaultLoadColumns(pQueryHandle, true);
     /*SDataBlockInfo* pBlockInfo =*/ tsdbRetrieveDataBlockInfo(pHandle, &blockInfo);
-    /*SArray *pDataBlock = */tsdbRetrieveDataBlock(pHandle, sa);
+    /*SArray *pDataBlock = */tsdbRetrieveDataBlock(pHandle, pQueryHandle->defaultLoadColumn);
   
     if (pQueryHandle->cur.win.ekey == pQueryHandle->window.skey) {
       // data already retrieve, discard other data rows and return
@@ -1508,7 +1515,6 @@ bool tsdbNextDataBlock(TsdbQueryHandleT* pHandle) {
       pQueryHandle->window   = pQueryHandle->cur.win;
       pQueryHandle->cur.rows = 1;
       pQueryHandle->type = TSDB_QUERY_TYPE_EXTERNAL;
-      taosArrayDestroy(sa);
       return true;
     } else {
       STsdbQueryHandle* pSecQueryHandle = calloc(1, sizeof(STsdbQueryHandle));
@@ -1522,7 +1528,10 @@ bool tsdbNextDataBlock(TsdbQueryHandleT* pHandle) {
       pSecQueryHandle->activeIndex = 0;
       pSecQueryHandle->outputCapacity = ((STsdbRepo*)pSecQueryHandle->pTsdb)->config.maxRowsPerFileBlock;
   
-      tsdbInitReadHelper(&pSecQueryHandle->rhelper, (STsdbRepo*) pSecQueryHandle->pTsdb);
+      if (tsdbInitReadHelper(&pSecQueryHandle->rhelper, (STsdbRepo*) pSecQueryHandle->pTsdb) != 0) {
+        free(pSecQueryHandle);
+        return false;
+      }
       tsdbTakeMemSnapshot(pSecQueryHandle->pTsdb, &pSecQueryHandle->mem, &pSecQueryHandle->imem);
 
       // allocate buffer in order to load data blocks from file
@@ -1565,7 +1574,7 @@ bool tsdbNextDataBlock(TsdbQueryHandleT* pHandle) {
       assert(ret);
 
       /*SDataBlockInfo* pBlockInfo =*/ tsdbRetrieveDataBlockInfo((void*) pSecQueryHandle, &blockInfo);
-      /*SArray *pDataBlock = */tsdbRetrieveDataBlock((void*) pSecQueryHandle, sa);
+      /*SArray *pDataBlock = */tsdbRetrieveDataBlock((void*) pSecQueryHandle, pSecQueryHandle->defaultLoadColumn);
   
       for (int32_t i = 0; i < numOfCols; ++i) {
         SColumnInfoData* pCol = taosArrayGet(pQueryHandle->pColumns, i);
@@ -1606,7 +1615,9 @@ bool tsdbNextDataBlock(TsdbQueryHandleT* pHandle) {
   }
   
   // TODO: opt by consider the scan order
-  return doHasDataInBuffer(pQueryHandle);
+  bool ret = doHasDataInBuffer(pQueryHandle);
+  terrno = TSDB_CODE_SUCCESS;
+  return ret;
 }
 
 void changeQueryHandleForLastrowQuery(TsdbQueryHandleT pqHandle) {
@@ -1801,7 +1812,8 @@ int32_t tsdbRetrieveDataBlockStatisInfo(TsdbQueryHandleT* pQueryHandle, SDataSta
   }
   
   tsdbLoadCompData(&pHandle->rhelper, pBlockInfo->compBlock, NULL);
-  
+
+  // todo opt perf
   size_t numOfCols = QH_GET_NUM_OF_COLS(pHandle);
   for(int32_t i = 0; i < numOfCols; ++i) {
     SDataStatis* st = &pHandle->statis[i];
@@ -1820,6 +1832,13 @@ int32_t tsdbRetrieveDataBlockStatisInfo(TsdbQueryHandleT* pQueryHandle, SDataSta
     if (pHandle->statis[i].numOfNull == -1) { // set the column data are all NULL
       pHandle->statis[i].numOfNull = pBlockInfo->compBlock->numOfRows;
     }
+
+    // todo opt perf
+    SColumnInfo* pColInfo = taosArrayGet(pHandle->pColumns, i);
+    if (pColInfo->type == TSDB_DATA_TYPE_TIMESTAMP) {
+      pHandle->statis[i].min = pBlockInfo->compBlock->keyFirst;
+      pHandle->statis[i].max = pBlockInfo->compBlock->keyLast;
+    }
   }
   
   return TSDB_CODE_SUCCESS;
@@ -2193,7 +2212,7 @@ int32_t tsdbQuerySTableByTagCond(TSDB_REPO_T* tsdb, uint64_t uid, const char* pT
   int32_t ret = TSDB_CODE_SUCCESS;
   tExprNode* expr = NULL;
 
-  TRY(32) {
+  TRY(TSDB_MAX_TAGS) {
     expr = exprTreeFromTableName(tbnameCond);
     if (expr == NULL) {
       expr = exprTreeFromBinary(pTagCond, len);
@@ -2217,7 +2236,8 @@ int32_t tsdbQuerySTableByTagCond(TSDB_REPO_T* tsdb, uint64_t uid, const char* pT
 
   } CATCH( code ) {
     CLEANUP_EXECUTE();
-    ret = code;
+    terrno = code;
+    goto _error; 
     // TODO: more error handling
   } END_TRY
 
@@ -2333,6 +2353,7 @@ void tsdbCleanupQueryHandle(TsdbQueryHandleT queryHandle) {
    }
 
   taosArrayDestroy(pQueryHandle->pColumns);
+  taosArrayDestroy(pQueryHandle->defaultLoadColumn);
   tfree(pQueryHandle->pDataBlockInfo);
   tfree(pQueryHandle->statis);
 
diff --git a/src/util/inc/exception.h b/src/util/inc/exception.h
index 52cd03d830..38f94bfe28 100644
--- a/src/util/inc/exception.h
+++ b/src/util/inc/exception.h
@@ -78,6 +78,7 @@ void cleanupPush_int_ptr        ( bool failOnly, void* func, void* arg );
 int32_t cleanupGetActionCount();
 void cleanupExecuteTo( int32_t anchor, bool failed );
 void cleanupExecute( SExceptionNode* node, bool failed );
+bool cleanupExceedLimit();
 
 #define CLEANUP_PUSH_VOID_PTR_PTR( failOnly, func, arg1, arg2 )  cleanupPush_void_ptr_ptr( (failOnly), (void*)(func), (void*)(arg1), (void*)(arg2) )
 #define CLEANUP_PUSH_VOID_PTR_BOOL( failOnly, func, arg1, arg2 ) cleanupPush_void_ptr_bool( (failOnly), (void*)(func), (void*)(arg1), (bool)(arg2) )
@@ -91,7 +92,7 @@ void cleanupExecute( SExceptionNode* node, bool failed );
 
 #define CLEANUP_GET_ANCHOR()          cleanupGetActionCount()
 #define CLEANUP_EXECUTE_TO( anchor, failed )  cleanupExecuteTo( (anchor), (failed) )
-
+#define CLEANUP_EXCEED_LIMIT()        cleanupExceedLimit() 
 
 ////////////////////////////////////////////////////////////////////////////////
 // functions & macros for exception handling
diff --git a/src/util/inc/tarray.h b/src/util/inc/tarray.h
index 4d44e82b1b..71838af150 100644
--- a/src/util/inc/tarray.h
+++ b/src/util/inc/tarray.h
@@ -23,14 +23,13 @@ extern "C" {
 #include "os.h"
 
 #define TARRAY_MIN_SIZE 8
-#define TARRAY_GET_ELEM(array, index) ((array)->pData + (index) * (array)->elemSize)
+#define TARRAY_GET_ELEM(array, index) ((void*)((char*)((array)->pData) + (index) * (array)->elemSize))
 
 typedef struct SArray {
   size_t size;
   size_t capacity;
   size_t elemSize;
-
-  void* pData;
+  void*  pData;
 } SArray;
 
 /**
diff --git a/src/util/inc/tcache.h b/src/util/inc/tcache.h
index 2982b8dc70..5a3545fd8f 100644
--- a/src/util/inc/tcache.h
+++ b/src/util/inc/tcache.h
@@ -21,7 +21,7 @@ extern "C" {
 #endif
 
 #include "os.h"
-#include "tref.h"
+#include "tlockfree.h"
 #include "hash.h"
 
 typedef void (*__cache_free_fn_t)(void*);
@@ -33,17 +33,20 @@ typedef struct SCacheStatis {
   int64_t refreshCount;
 } SCacheStatis;
 
+struct STrashElem;
+
 typedef struct SCacheDataNode {
-  uint64_t addedTime;    // the added time when this element is added or updated into cache
-  uint64_t lifespan;     // expiredTime expiredTime when this element should be remove from cache
-  uint64_t signature;
-  uint32_t size;         // allocated size for current SCacheDataNode
+  uint64_t           addedTime;    // the added time when this element is added or updated into cache
+  uint64_t           lifespan;     // life duration when this element should be remove from cache
+  uint64_t           expireTime;   // expire time
+  uint64_t           signature;
+  struct STrashElem *pTNodeHeader; // point to trash node head
+  uint16_t           keySize: 15;  // max key size: 32kb
+  bool               inTrashCan: 1;// denote if it is in trash or not
+  uint32_t           size;         // allocated size for current SCacheDataNode
   T_REF_DECLARE()
-  uint16_t keySize: 15;  // max key size: 32kb
-  bool     inTrashCan: 1;// denote if it is in trash or not
-  int32_t  extendFactor; // number of life span extend
-  char    *key;
-  char     data[];
+  char              *key;
+  char               data[];
 } SCacheDataNode;
 
 typedef struct STrashElem {
diff --git a/src/util/inc/tfile.h b/src/util/inc/tfile.h
index 04e500743c..de52a40967 100644
--- a/src/util/inc/tfile.h
+++ b/src/util/inc/tfile.h
@@ -19,13 +19,14 @@
 #ifdef TAOS_RANDOM_FILE_FAIL
 
 void taosSetRandomFileFailFactor(int factor);
-ssize_t taos_tread(int fd, void *buf, size_t count);
-ssize_t taos_twrite(int fd, void *buf, size_t count);
-off_t taos_lseek(int fd, off_t offset, int whence);
+void taosSetRandomFileFailOutput(const char *path);
+ssize_t taos_tread(int fd, void *buf, size_t count, const char *file, uint32_t line);
+ssize_t taos_twrite(int fd, void *buf, size_t count, const char *file, uint32_t line);
+off_t taos_lseek(int fd, off_t offset, int whence, const char *file, uint32_t line);
 
-#define tread(fd, buf, count)  taos_tread(fd, buf, count)
-#define twrite(fd, buf, count)  taos_twrite(fd, buf, count)
-#define lseek(fd, offset, whence)  taos_lseek(fd, offset, whence)
+#define tread(fd, buf, count)  taos_tread(fd, buf, count, __FILE__, __LINE__)
+#define twrite(fd, buf, count)  taos_twrite(fd, buf, count, __FILE__, __LINE__)
+#define lseek(fd, offset, whence)  taos_lseek(fd, offset, whence, __FILE__, __LINE__)
 
 #endif  // TAOS_RANDOM_FILE_FAIL
 
diff --git a/src/util/inc/tref.h b/src/util/inc/tlockfree.h
similarity index 66%
rename from src/util/inc/tref.h
rename to src/util/inc/tlockfree.h
index 0503325326..e425d71d27 100644
--- a/src/util/inc/tref.h
+++ b/src/util/inc/tlockfree.h
@@ -12,12 +12,17 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-
-#ifndef TDENGINE_TREF_H
-#define TDENGINE_TREF_H
+#ifndef __TD_LOCK_FREE_H__
+#define __TD_LOCK_FREE_H__
 
 #include "os.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+// reference counting
 typedef void (*_ref_fn_t)(const void* pObj);
 
 #define T_REF_DECLARE() \
@@ -55,4 +60,47 @@ typedef void (*_ref_fn_t)(const void* pObj);
 
 #define T_REF_VAL_GET(x) (x)->_ref.val
 
-#endif  // TDENGINE_TREF_H
+
+
+// single writer multiple reader lock
+typedef int32_t SRWLatch;
+
+void taosInitRWLatch(SRWLatch *pLatch);
+void taosWLockLatch(SRWLatch *pLatch);
+void taosWUnLockLatch(SRWLatch *pLatch);
+void taosRLockLatch(SRWLatch *pLatch);
+void taosRUnLockLatch(SRWLatch *pLatch);
+
+
+
+// copy on read
+#define taosCorBeginRead(x) for (uint32_t i_ = 1; 1; ++i_) { \
+    int32_t old_ = atomic_load_32(x); \
+    if (old_ & 0x00000001) { \
+      if (i_ % 1000 == 0) { \
+        sched_yield(); \
+      } \
+      continue; \
+    }
+
+#define taosCorEndRead(x) \
+    if (atomic_load_32(x) == old_) { \
+      break; \
+    } \
+  }
+
+#define taosCorBeginWrite(x) taosCorBeginRead(x) \
+    if (atomic_val_compare_exchange_32((x), old_, old_ + 1) != old_) { \
+        continue; \
+    }
+
+#define taosCorEndWrite(x) atomic_add_fetch_32((x), 1); \
+    break; \
+  }
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/util/inc/trwlatch.h b/src/util/inc/trwlatch.h
deleted file mode 100644
index c6923f0e90..0000000000
--- a/src/util/inc/trwlatch.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef __TD_RWLATCH_H__
-#define __TD_RWLATCH_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <stdint.h>
-
-typedef int32_t SRWLatch;
-
-void taosInitRWLatch(SRWLatch *pLatch);
-void taosWLockLatch(SRWLatch *pLatch);
-void taosWUnLockLatch(SRWLatch *pLatch);
-void taosRLockLatch(SRWLatch *pLatch);
-void taosRUnLockLatch(SRWLatch *pLatch);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/src/util/inc/tutil.h b/src/util/inc/tutil.h
index 1ba57bbaaa..f7c69e3973 100644
--- a/src/util/inc/tutil.h
+++ b/src/util/inc/tutil.h
@@ -133,6 +133,8 @@ char **strsplit(char *src, const char *delim, int32_t *num);
 
 char* strtolower(char *dst, const char *src);
 
+char* strntolower(char *dst, const char *src, int32_t n);
+
 int64_t strnatoi(char *num, int32_t len);
 
 //char* strreplace(const char* str, const char* pattern, const char* rep);
diff --git a/src/util/src/exception.c b/src/util/src/exception.c
index e1f6516fe7..0b716b6aba 100644
--- a/src/util/src/exception.c
+++ b/src/util/src/exception.c
@@ -147,3 +147,6 @@ void cleanupExecuteTo( int32_t anchor, bool failed ) {
 void cleanupExecute( SExceptionNode* node, bool failed ) {
     doExecuteCleanup( node, 0, failed );
 }
+bool cleanupExceedLimit() {
+  return expList->numCleanupAction >= expList->maxCleanupAction;
+}
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index 688e49a40b..072e9939de 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -116,11 +116,13 @@ static FORCE_INLINE void taosCacheReleaseNode(SCacheObj *pCacheObj, SCacheDataNo
     return;
   }
   
-  int32_t size = pNode->size;
   taosHashRemove(pCacheObj->pHashTable, pNode->key, pNode->keySize);
 
+  pCacheObj->totalSize -= pNode->size;
   uDebug("cache:%s, key:%p, %p is destroyed from cache, totalNum:%d totalSize:%" PRId64 "bytes size:%dbytes",
-         pCacheObj->name, pNode->key, pNode->data, (int32_t)taosHashGetSize(pCacheObj->pHashTable), pCacheObj->totalSize, size);
+         pCacheObj->name, pNode->key, pNode->data, (int32_t)taosHashGetSize(pCacheObj->pHashTable), pCacheObj->totalSize,
+         pNode->size);
+
   if (pCacheObj->freeFp) pCacheObj->freeFp(pNode->data);
   free(pNode);
 }
@@ -285,14 +287,14 @@ void *taosCachePut(SCacheObj *pCacheObj, const void *key, size_t keyLen, const v
 
       uDebug("cache:%s, key:%p, %p added into cache, added:%" PRIu64 ", expire:%" PRIu64 ", totalNum:%d totalSize:%" PRId64
              "bytes size:%" PRId64 "bytes",
-             pCacheObj->name, key, pNode->data, pNode->addedTime, (pNode->lifespan * pNode->extendFactor + pNode->addedTime),
+             pCacheObj->name, key, pNode->data, pNode->addedTime, pNode->expireTime,
              (int32_t)taosHashGetSize(pCacheObj->pHashTable), pCacheObj->totalSize, dataSize);
     } else {
       uError("cache:%s, key:%p, failed to added into cache, out of memory", pCacheObj->name, key);
     }
   } else {  // old data exists, update the node
     pNode = taosUpdateCacheImpl(pCacheObj, pOld, key, keyLen, pData, dataSize, duration * 1000L);
-    uDebug("cache:%s, key:%p, %p exist in cache, updated", pCacheObj->name, key, pNode->data);
+    uDebug("cache:%s, key:%p, %p exist in cache, updated old:%p", pCacheObj->name, key, pNode->data, pOld);
   }
 
   __cache_unlock(pCacheObj);
@@ -305,36 +307,30 @@ void *taosCacheAcquireByKey(SCacheObj *pCacheObj, const void *key, size_t keyLen
     return NULL;
   }
 
+  void *pData = NULL;
+
   __cache_rd_lock(pCacheObj);
-  
+
   SCacheDataNode **ptNode = (SCacheDataNode **)taosHashGet(pCacheObj->pHashTable, key, keyLen);
 
   int32_t ref = 0;
   if (ptNode != NULL) {
     ref = T_REF_INC(*ptNode);
-
-    // if the remained life span is less then the (*ptNode)->lifeSpan, add up one lifespan
-    if (pCacheObj->extendLifespan) {
-      int64_t now = taosGetTimestampMs();
-
-      if ((now - (*ptNode)->addedTime) < (*ptNode)->lifespan * (*ptNode)->extendFactor) {
-        (*ptNode)->extendFactor += 1;
-        uDebug("key:%p extend life time to %"PRId64, key, (*ptNode)->lifespan * (*ptNode)->extendFactor + (*ptNode)->addedTime);
-      }
-    }
+    pData = (*ptNode)->data;
   }
+
   __cache_unlock(pCacheObj);
-  
-  if (ptNode != NULL) {
+
+  if (pData != NULL) {
     atomic_add_fetch_32(&pCacheObj->statistics.hitCount, 1);
-    uDebug("cache:%s, key:%p, %p is retrieved from cache, refcnt:%d", pCacheObj->name, key, (*ptNode)->data, ref);
+    uDebug("cache:%s, key:%p, %p is retrieved from cache, refcnt:%d", pCacheObj->name, key, pData, ref);
   } else {
     atomic_add_fetch_32(&pCacheObj->statistics.missCount, 1);
     uDebug("cache:%s, key:%p, not in cache, retrieved failed", pCacheObj->name, key);
   }
-  
+
   atomic_add_fetch_32(&pCacheObj->statistics.totalAccess, 1);
-  return (ptNode != NULL) ? (*ptNode)->data : NULL;
+  return pData;
 }
 
 void* taosCacheUpdateExpireTimeByName(SCacheObj *pCacheObj, void *key, size_t keyLen, uint64_t expireTime) {
@@ -347,8 +343,7 @@ void* taosCacheUpdateExpireTimeByName(SCacheObj *pCacheObj, void *key, size_t ke
   SCacheDataNode **ptNode = (SCacheDataNode **)taosHashGet(pCacheObj->pHashTable, key, keyLen);
   if (ptNode != NULL) {
      T_REF_INC(*ptNode);
-    (*ptNode)->extendFactor += 1;
-//    (*ptNode)->lifespan = expireTime;
+    (*ptNode)->expireTime = taosGetTimestampMs() + (*ptNode)->lifespan;
   }
 
   __cache_unlock(pCacheObj);
@@ -380,17 +375,6 @@ void *taosCacheAcquireByData(SCacheObj *pCacheObj, void *data) {
   int32_t ref = T_REF_INC(ptNode);
   uDebug("cache:%s, data: %p acquired by data in cache, refcnt:%d", pCacheObj->name, ptNode->data, ref);
 
-  // if the remained life span is less then the (*ptNode)->lifeSpan, add up one lifespan
-  if (pCacheObj->extendLifespan) {
-    int64_t now = taosGetTimestampMs();
-
-    if ((now - ptNode->addedTime) < ptNode->lifespan * ptNode->extendFactor) {
-      ptNode->extendFactor += 1;
-      uDebug("cache:%s, %p extend life time to %" PRId64, pCacheObj->name, ptNode->data,
-             ptNode->lifespan * ptNode->extendFactor + ptNode->addedTime);
-    }
-  }
-
   // the data if referenced by at least one object, so the reference count must be greater than the value of 2.
   assert(ref >= 2);
   return data;
@@ -431,23 +415,91 @@ void taosCacheRelease(SCacheObj *pCacheObj, void **data, bool _remove) {
   }
 
   *data = NULL;
-  int16_t ref = T_REF_DEC(pNode);
-  uDebug("cache:%s, key:%p, %p is released, refcnt:%d", pCacheObj->name, pNode->key, pNode->data, ref);
 
-  if (_remove && (!pNode->inTrashCan)) {
+  // note: extend lifespan before dec ref count
+  bool inTrashCan = pNode->inTrashCan;
+
+  if (pCacheObj->extendLifespan && (!inTrashCan)) {
+    atomic_store_64(&pNode->expireTime, pNode->lifespan + taosGetTimestampMs());
+    uDebug("cache:%s data:%p extend life time to %"PRId64 "  before release", pCacheObj->name, pNode->data, pNode->expireTime);
+  }
+
+  if (_remove) {
     __cache_wr_lock(pCacheObj);
 
-    if (T_REF_VAL_GET(pNode) == 0) {
-      // remove directly, if not referenced by other users
-      taosCacheReleaseNode(pCacheObj, pNode);
+    // NOTE: once refcount is decrease, pNode may be freed by other thread immediately.
+    int32_t ref = T_REF_DEC(pNode);
+    uDebug("cache:%s, key:%p, %p is released, refcnt:%d", pCacheObj->name, pNode->key, pNode->data, ref);
+
+    /*
+     * If it is not referenced by other users, remove it immediately. Otherwise move this node to trashcan wait for all users
+     * releasing this resources.
+     *
+     * NOTE: previous ref is 0, and current ref is still 0, remove it. If previous is not 0, there is another thread
+     * that tries to do the same thing.
+     */
+    if (pNode->inTrashCan) {
+      if (ref == 0) {
+        assert(pNode->pTNodeHeader->pData == pNode);
+        taosRemoveFromTrashCan(pCacheObj, pNode->pTNodeHeader);
+      }
     } else {
-      // pNode may be released immediately by other thread after the reference count of pNode is set to 0,
-      // So we need to lock it in the first place.
-      taosCacheMoveToTrash(pCacheObj, pNode);
+      if (ref > 0) {
+        assert(pNode->pTNodeHeader == NULL);
+        taosCacheMoveToTrash(pCacheObj, pNode);
+      } else {
+        taosCacheReleaseNode(pCacheObj, pNode);
+      }
+    }
+
+    __cache_unlock(pCacheObj);
+
+  } else {
+    uDebug("cache:%s, key:%p, %p is released, refcnt:%d", pCacheObj->name, pNode->key, pNode->data, T_REF_VAL_GET(pNode) - 1);
+
+    __cache_wr_lock(pCacheObj);
+
+    // NOTE: once refcount is decrease, pNode may be freed by other thread immediately.
+    int32_t ref = T_REF_DEC(pNode);
+
+    if (inTrashCan && (ref == 0)) {
+      // Remove it if the ref count is 0.
+      // The ref count does not need to load and check again after lock acquired, since ref count can not be increased when
+      // the node is in trashcan.
+      assert(pNode->pTNodeHeader->pData == pNode);
+      taosRemoveFromTrashCan(pCacheObj, pNode->pTNodeHeader);
     }
 
     __cache_unlock(pCacheObj);
   }
+
+//   else {
+//    if (_remove) { // not in trash can, but need to remove it
+//      __cache_wr_lock(pCacheObj);
+//
+//      /*
+//       * If not referenced by other users. Otherwise move this node to trashcan wait for all users
+//       * releasing this resources.
+//       *
+//       * NOTE: previous ref is 0, and current ref is still 0, remove it. If previous is not 0, there is another thread
+//       * that tries to do the same thing.
+//       */
+//      if (ref == 0) {
+//        if (T_REF_VAL_GET(pNode) == 0) {
+//          taosCacheReleaseNode(pCacheObj, pNode);
+//        } else {
+//          taosCacheMoveToTrash(pCacheObj, pNode);
+//        }
+//      } else if (ref > 0) {
+//        if (!pNode->inTrashCan) {
+//          assert(pNode->pTNodeHeader == NULL);
+//          taosCacheMoveToTrash(pCacheObj, pNode);
+//        }
+//      }
+//
+//      __cache_unlock(pCacheObj);
+//    }
+//  }
 }
 
 void taosCacheEmpty(SCacheObj *pCacheObj) {
@@ -486,7 +538,7 @@ void taosCacheCleanup(SCacheObj *pCacheObj) {
 
 SCacheDataNode *taosCreateCacheNode(const char *key, size_t keyLen, const char *pData, size_t size,
                                            uint64_t duration) {
-  size_t totalSize = size + sizeof(SCacheDataNode) + keyLen + 1;
+  size_t totalSize = size + sizeof(SCacheDataNode) + keyLen;
 
   SCacheDataNode *pNewNode = calloc(1, totalSize);
   if (pNewNode == NULL) {
@@ -503,7 +555,7 @@ SCacheDataNode *taosCreateCacheNode(const char *key, size_t keyLen, const char *
 
   pNewNode->addedTime    = (uint64_t)taosGetTimestampMs();
   pNewNode->lifespan     = duration;
-  pNewNode->extendFactor = 1;
+  pNewNode->expireTime   = pNewNode->addedTime + pNewNode->lifespan;
   pNewNode->signature    = (uint64_t)pNewNode;
   pNewNode->size         = (uint32_t)totalSize;
 
@@ -512,6 +564,7 @@ SCacheDataNode *taosCreateCacheNode(const char *key, size_t keyLen, const char *
 
 void taosAddToTrash(SCacheObj *pCacheObj, SCacheDataNode *pNode) {
   if (pNode->inTrashCan) { /* node is already in trash */
+    assert(pNode->pTNodeHeader != NULL && pNode->pTNodeHeader->pData == pNode);
     return;
   }
 
@@ -527,6 +580,7 @@ void taosAddToTrash(SCacheObj *pCacheObj, SCacheDataNode *pNode) {
   pCacheObj->pTrash = pElem;
 
   pNode->inTrashCan = true;
+  pNode->pTNodeHeader = pElem;
   pCacheObj->numOfElemsInTrash++;
 
   uDebug("key:%p, %p move to trash, numOfElem in trash:%d", pNode->key, pNode->data, pCacheObj->numOfElemsInTrash);
@@ -629,7 +683,7 @@ static void doCacheRefresh(SCacheObj* pCacheObj, int64_t time, __cache_free_fn_t
   __cache_wr_lock(pCacheObj);
   while (taosHashIterNext(pIter)) {
     SCacheDataNode *pNode = *(SCacheDataNode **)taosHashIterGet(pIter);
-    if ((pNode->addedTime + pNode->lifespan * pNode->extendFactor) <= time && T_REF_VAL_GET(pNode) <= 0) {
+    if (pNode->expireTime < time && T_REF_VAL_GET(pNode) <= 0) {
       taosCacheReleaseNode(pCacheObj, pNode);
       continue;
     }
diff --git a/src/util/src/tfile.c b/src/util/src/tfile.c
index 92eeaef126..d1a9c24615 100644
--- a/src/util/src/tfile.c
+++ b/src/util/src/tfile.c
@@ -29,14 +29,55 @@
 #ifdef TAOS_RANDOM_FILE_FAIL
 
 static int random_file_fail_factor = 20;
+static FILE *fpRandomFileFailOutput = NULL;
 
 void taosSetRandomFileFailFactor(int factor)
 {
   random_file_fail_factor = factor;
 }
+
+static void close_random_file_fail_output()
+{
+  if (fpRandomFileFailOutput != NULL) {
+    if (fpRandomFileFailOutput != stdout) {
+      fclose(fpRandomFileFailOutput);
+    }
+    fpRandomFileFailOutput = NULL;
+  }
+}
+
+static void random_file_fail_output_sig(int sig)
+{
+  fprintf(fpRandomFileFailOutput, "signal %d received.\n", sig);
+
+  struct sigaction act = {0};
+  act.sa_handler = SIG_DFL;
+  sigaction(sig, &act, NULL);
+
+  close_random_file_fail_output();
+  exit(EXIT_FAILURE);
+}
+
+void taosSetRandomFileFailOutput(const char *path)
+{
+  if (path == NULL) {
+    fpRandomFileFailOutput = stdout;
+  } else if ((fpRandomFileFailOutput = fopen(path, "w")) != NULL) {
+    atexit(close_random_file_fail_output);
+  } else {
+    printf("failed to open random file fail log file '%s', errno=%d\n", path, errno);
+    return;
+  }
+
+  struct sigaction act = {0};
+  act.sa_handler = random_file_fail_output_sig;
+  sigaction(SIGFPE, &act, NULL);
+  sigaction(SIGSEGV, &act, NULL);
+  sigaction(SIGILL, &act, NULL);
+}
 #endif
 
-ssize_t taos_tread(int fd, void *buf, size_t count)
+ssize_t taos_tread(int fd, void *buf, size_t count, const char *file, uint32_t line)
 {
 #ifdef TAOS_RANDOM_FILE_FAIL
   if (random_file_fail_factor > 0) {
@@ -49,7 +90,7 @@ ssize_t taos_tread(int fd, void *buf, size_t count)
   return tread(fd, buf, count);
 }
 
-ssize_t taos_twrite(int fd, void *buf, size_t count)
+ssize_t taos_twrite(int fd, void *buf, size_t count, const char *file, uint32_t line)
 {
 #ifdef TAOS_RANDOM_FILE_FAIL
   if (random_file_fail_factor > 0) {
@@ -62,7 +103,7 @@ ssize_t taos_twrite(int fd, void *buf, size_t count)
   return twrite(fd, buf, count);
 }
 
-off_t taos_lseek(int fd, off_t offset, int whence)
+off_t taos_lseek(int fd, off_t offset, int whence, const char *file, uint32_t line)
 {
 #ifdef TAOS_RANDOM_FILE_FAIL
   if (random_file_fail_factor > 0) {
diff --git a/src/util/src/tidpool.c b/src/util/src/tidpool.c
index 3764c7966b..53d81bb542 100644
--- a/src/util/src/tidpool.c
+++ b/src/util/src/tidpool.c
@@ -123,7 +123,7 @@ void taosIdPoolMarkStatus(void *handle, int id) {
 int taosUpdateIdPool(id_pool_t *handle, int maxId) {
   id_pool_t *pIdPool = (id_pool_t*)handle;
   if (maxId <= pIdPool->maxId) {
-    return -1;
+    return 0;
   }
 
   bool *idList = calloc(maxId, sizeof(bool));
diff --git a/src/util/src/tkvstore.c b/src/util/src/tkvstore.c
index 2a24a59742..ab2aa738c6 100644
--- a/src/util/src/tkvstore.c
+++ b/src/util/src/tkvstore.c
@@ -260,7 +260,7 @@ int tdUpdateKVStoreRecord(SKVStore *pStore, uint64_t uid, void *cont, int contLe
   }
 
   taosHashPut(pStore->map, (void *)(&uid), sizeof(uid), (void *)(&rInfo), sizeof(rInfo));
-  uDebug("put uid %" PRIu64 " into kvStore %s", uid, pStore->fname);
+  uTrace("put uid %" PRIu64 " into kvStore %s", uid, pStore->fname);
 
   return 0;
 }
diff --git a/src/util/src/trwlatch.c b/src/util/src/tlockfree.c
similarity index 98%
rename from src/util/src/trwlatch.c
rename to src/util/src/tlockfree.c
index cc027aa3df..3161518a36 100644
--- a/src/util/src/trwlatch.c
+++ b/src/util/src/tlockfree.c
@@ -15,8 +15,7 @@
 // #define _GNU_SOURCE
 // #include <pthread.h>
 
-#include "trwlatch.h"
-#include "os.h"
+#include "tlockfree.h"
 
 #define TD_RWLATCH_WRITE_FLAG 0x40000000
 
diff --git a/src/util/src/tsocket.c b/src/util/src/tsocket.c
index b225dfa36a..5de61a3d57 100644
--- a/src/util/src/tsocket.c
+++ b/src/util/src/tsocket.c
@@ -270,6 +270,14 @@ int taosOpenTcpClientSocket(uint32_t destIp, uint16_t destPort, uint32_t clientI
     return -1;
   }
 
+  /* set REUSEADDR option, so the portnumber can be re-used */
+  int reuse = 1;
+  if (taosSetSockOpt(sockFd, SOL_SOCKET, SO_REUSEADDR, (void *)&reuse, sizeof(reuse)) < 0) {
+    uError("setsockopt SO_REUSEADDR failed: %d (%s)", errno, strerror(errno));
+    close(sockFd);
+    return -1;
+  };
+
   if ( clientIp != 0) {
     memset((char *)&clientAddr, 0, sizeof(clientAddr));
     clientAddr.sin_family = AF_INET;
diff --git a/src/util/src/ttime.c b/src/util/src/ttime.c
index 6f67c4a136..018c0d640b 100644
--- a/src/util/src/ttime.c
+++ b/src/util/src/ttime.c
@@ -317,29 +317,34 @@ int32_t parseLocaltimeWithDst(char* timestr, int64_t* time, int32_t timePrec) {
 static int32_t getTimestampInUsFromStrImpl(int64_t val, char unit, int64_t* result) {
   *result = val;
 
+  int64_t factor = 1000L;
+
   switch (unit) {
     case 's':
-      (*result) *= MILLISECOND_PER_SECOND;
+      (*result) *= MILLISECOND_PER_SECOND*factor;
       break;
     case 'm':
-      (*result) *= MILLISECOND_PER_MINUTE;
+      (*result) *= MILLISECOND_PER_MINUTE*factor;
       break;
     case 'h':
-      (*result) *= MILLISECOND_PER_HOUR;
+      (*result) *= MILLISECOND_PER_HOUR*factor;
       break;
     case 'd':
-      (*result) *= MILLISECOND_PER_DAY;
+      (*result) *= MILLISECOND_PER_DAY*factor;
       break;
     case 'w':
-      (*result) *= MILLISECOND_PER_WEEK;
+      (*result) *= MILLISECOND_PER_WEEK*factor;
       break;
     case 'n':
-      (*result) *= MILLISECOND_PER_MONTH;
+      (*result) *= MILLISECOND_PER_MONTH*factor;
       break;
     case 'y':
-      (*result) *= MILLISECOND_PER_YEAR;
+      (*result) *= MILLISECOND_PER_YEAR*factor;
       break;
     case 'a':
+      (*result) *= factor;
+      break;
+    case 'u':
       break;
     default: {
       ;
@@ -348,7 +353,6 @@ static int32_t getTimestampInUsFromStrImpl(int64_t val, char unit, int64_t* resu
   }
 
   /* get the value in microsecond */
-  (*result) *= 1000L;
   return 0;
 }
 
diff --git a/src/util/src/ttimer.c b/src/util/src/ttimer.c
index 62aa2007b2..5cdc6ff918 100644
--- a/src/util/src/ttimer.c
+++ b/src/util/src/ttimer.c
@@ -24,10 +24,10 @@ extern int32_t tscEmbedded;
 
 #define tmrFatal(...) { if (tmrDebugFlag & DEBUG_FATAL) { taosPrintLog("TMR FATAL ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
 #define tmrError(...) { if (tmrDebugFlag & DEBUG_ERROR) { taosPrintLog("TMR ERROR ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
-#define tmrWarn(...)  { if (tmrDebugFlag & DEBUG_WARN)  { taosPrintLog("TMR WARN  ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
-#define tmrInfo(...)  { if (tmrDebugFlag & DEBUG_INFO)  { taosPrintLog("TMR INFO  ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
-#define tmrDebug(...) { if (tmrDebugFlag & DEBUG_DEBUG) { taosPrintLog("TMR DEBUG ", tmrDebugFlag, __VA_ARGS__); }}
-#define tmrTrace(...) { if (tmrDebugFlag & DEBUG_TRACE) { taosPrintLog("TMR TRACE ", tmrDebugFlag, __VA_ARGS__); }}
+#define tmrWarn(...)  { if (tmrDebugFlag & DEBUG_WARN)  { taosPrintLog("TMR WARN ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
+#define tmrInfo(...)  { if (tmrDebugFlag & DEBUG_INFO)  { taosPrintLog("TMR ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
+#define tmrDebug(...) { if (tmrDebugFlag & DEBUG_DEBUG) { taosPrintLog("TMR ", tmrDebugFlag, __VA_ARGS__); }}
+#define tmrTrace(...) { if (tmrDebugFlag & DEBUG_TRACE) { taosPrintLog("TMR ", tmrDebugFlag, __VA_ARGS__); }}
 
 #define TIMER_STATE_WAITING 0
 #define TIMER_STATE_EXPIRED 1
diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index 1a74359f47..3764df4afc 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -234,6 +234,35 @@ char* strtolower(char *dst, const char *src) {
   *p = 0;
   return dst;
 }
+char* strntolower(char *dst, const char *src, int32_t n) {
+  int esc = 0;
+  char quote = 0, *p = dst, c;
+
+  assert(dst != NULL);
+  if (n == 0) {
+    *p = 0;
+    return dst;
+  } 
+  for (c = *src++; n-- > 0; c = *src++) {
+    if (esc) {
+      esc = 0;
+    } else if (quote) {
+      if (c == '\\') {
+        esc = 1;
+      } else if (c == quote) {
+        quote = 0;
+      }
+    } else if (c >= 'A' && c <= 'Z') {
+      c -= 'A' - 'a';
+    } else if (c == '\'' || c == '"') {
+      quote = c;
+    }
+    *p++ = c;
+  }
+
+  *p = 0;
+  return dst;
+}
 
 char *paGetToken(char *string, char **token, int32_t *tokenLen) {
   char quote = 0;
diff --git a/src/vnode/inc/vnodeInt.h b/src/vnode/inc/vnodeInt.h
index 4f22c7784d..74cfbf1e73 100644
--- a/src/vnode/inc/vnodeInt.h
+++ b/src/vnode/inc/vnodeInt.h
@@ -29,15 +29,15 @@ extern int32_t vDebugFlag;
 
 #define vFatal(...) { if (vDebugFlag & DEBUG_FATAL) { taosPrintLog("VND FATAL ", 255, __VA_ARGS__); }}
 #define vError(...) { if (vDebugFlag & DEBUG_ERROR) { taosPrintLog("VND ERROR ", 255, __VA_ARGS__); }}
-#define vWarn(...)  { if (vDebugFlag & DEBUG_WARN)  { taosPrintLog("VND WARN  ", 255, __VA_ARGS__); }}
-#define vInfo(...)  { if (vDebugFlag & DEBUG_INFO)  { taosPrintLog("VND INFO  ", 255, __VA_ARGS__); }}
-#define vDebug(...) { if (vDebugFlag & DEBUG_DEBUG) { taosPrintLog("VND DEBUG ", vDebugFlag, __VA_ARGS__); }}
-#define vTrace(...) { if (vDebugFlag & DEBUG_TRACE) { taosPrintLog("VND TRACE ", vDebugFlag, __VA_ARGS__); }}
+#define vWarn(...)  { if (vDebugFlag & DEBUG_WARN)  { taosPrintLog("VND WARN ", 255, __VA_ARGS__); }}
+#define vInfo(...)  { if (vDebugFlag & DEBUG_INFO)  { taosPrintLog("VND ", 255, __VA_ARGS__); }}
+#define vDebug(...) { if (vDebugFlag & DEBUG_DEBUG) { taosPrintLog("VND ", vDebugFlag, __VA_ARGS__); }}
+#define vTrace(...) { if (vDebugFlag & DEBUG_TRACE) { taosPrintLog("VND ", vDebugFlag, __VA_ARGS__); }}
 
 typedef struct {
   int32_t      vgId;      // global vnode group ID
   int32_t      refCount;  // reference count
-  int          status; 
+  int8_t       status; 
   int8_t       role;   
   int8_t       accessState;
   int64_t      version;   // current version 
@@ -55,6 +55,8 @@ typedef struct {
   SWalCfg      walCfg;
   void        *qMgmt;
   char        *rootDir;
+  tsem_t       sem;
+  int8_t       dropped;
   char         db[TSDB_DB_NAME_LEN];
 } SVnodeObj;
 
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 18c9ebf2e1..bf98824570 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -44,7 +44,7 @@ static int      vnodeProcessTsdbStatus(void *arg, int status);
 static uint32_t vnodeGetFileInfo(void *ahandle, char *name, uint32_t *index, uint32_t eindex, int32_t *size, uint64_t *fversion);
 static int      vnodeGetWalInfo(void *ahandle, char *name, uint32_t *index);
 static void     vnodeNotifyRole(void *ahandle, int8_t role);
-static void     vnodeNotifyFileSynced(void *ahandle, uint64_t fversion);
+static int      vnodeNotifyFileSynced(void *ahandle, uint64_t fversion);
 
 #ifndef _SYNC
 tsync_h syncStart(const SSyncInfo *info) { return NULL; }
@@ -59,7 +59,7 @@ int32_t vnodeInitResources() {
   vnodeInitWriteFp();
   vnodeInitReadFp();
 
-  tsDnodeVnodesHash = taosHashInit(TSDB_MAX_VNODES, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true);
+  tsDnodeVnodesHash = taosHashInit(TSDB_MIN_VNODES, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true);
   if (tsDnodeVnodesHash == NULL) {
     vError("failed to init vnode list");
     return TSDB_CODE_VND_OUT_OF_MEMORY;
@@ -69,6 +69,7 @@ int32_t vnodeInitResources() {
 }
 
 void vnodeCleanupResources() {
+
   if (tsDnodeVnodesHash != NULL) {
     taosHashCleanup(tsDnodeVnodesHash);
     tsDnodeVnodesHash = NULL;
@@ -137,7 +138,7 @@ int32_t vnodeCreate(SMDCreateVnodeMsg *pVnodeCfg) {
     return TSDB_CODE_VND_INIT_FAILED;
   }
 
-  vInfo("vgId:%d, vnode is created, clog:%d", pVnodeCfg->cfg.vgId, pVnodeCfg->cfg.walLevel);
+  vInfo("vgId:%d, vnode is created, walLevel:%d fsyncPeriod:%d", pVnodeCfg->cfg.vgId, pVnodeCfg->cfg.walLevel, pVnodeCfg->cfg.fsyncPeriod);
   code = vnodeOpen(pVnodeCfg->cfg.vgId, rootDir);
 
   return code;
@@ -152,7 +153,7 @@ int32_t vnodeDrop(int32_t vgId) {
 
   SVnodeObj *pVnode = *ppVnode;
   vTrace("vgId:%d, vnode will be dropped, refCount:%d", pVnode->vgId, pVnode->refCount);
-  pVnode->status = TAOS_VN_STATUS_DELETING;
+  pVnode->dropped = 1;
   vnodeCleanUp(pVnode);
 
   return TSDB_CODE_SUCCESS;
@@ -163,29 +164,36 @@ int32_t vnodeAlter(void *param, SMDCreateVnodeMsg *pVnodeCfg) {
 
   // vnode in non-ready state and still needs to return success instead of TSDB_CODE_VND_INVALID_STATUS
   // cfgVersion can be corrected by status msg
-  if (pVnode->status != TAOS_VN_STATUS_READY) {
+  if (atomic_val_compare_exchange_8(&pVnode->status, TAOS_VN_STATUS_READY, TAOS_VN_STATUS_UPDATING) != TAOS_VN_STATUS_READY) {
     vDebug("vgId:%d, vnode is not ready, do alter operation later", pVnode->vgId);
     return TSDB_CODE_SUCCESS;
   }
 
-  // the vnode may always fail to synchronize because of it in low cfgVersion
-  // so cannot use the following codes
-  // if (pVnode->syncCfg.replica > 1 && pVnode->role == TAOS_SYNC_ROLE_UNSYNCED) 
-  //   return TSDB_CODE_VND_NOT_SYNCED;
-
-  pVnode->status = TAOS_VN_STATUS_UPDATING;
-
   int32_t code = vnodeSaveCfg(pVnodeCfg);
-  if (code != TSDB_CODE_SUCCESS) return code; 
+  if (code != TSDB_CODE_SUCCESS) {
+    pVnode->status = TAOS_VN_STATUS_READY;
+    return code; 
+  }
 
   code = vnodeReadCfg(pVnode);
-  if (code != TSDB_CODE_SUCCESS) return code; 
+  if (code != TSDB_CODE_SUCCESS) {
+    pVnode->status = TAOS_VN_STATUS_READY;
+    return code; 
+  }
 
   code = syncReconfig(pVnode->sync, &pVnode->syncCfg);
-  if (code != TSDB_CODE_SUCCESS) return code; 
+  if (code != TSDB_CODE_SUCCESS) {
+    pVnode->status = TAOS_VN_STATUS_READY;
+    return code; 
+  } 
 
-  code = tsdbConfigRepo(pVnode->tsdb, &pVnode->tsdbCfg);
-  if (code != TSDB_CODE_SUCCESS) return code; 
+  if (pVnode->tsdb) {
+    code = tsdbConfigRepo(pVnode->tsdb, &pVnode->tsdbCfg);
+    if (code != TSDB_CODE_SUCCESS) {
+      pVnode->status = TAOS_VN_STATUS_READY;
+      return code; 
+    }
+  }
 
   pVnode->status = TAOS_VN_STATUS_READY;
   vDebug("vgId:%d, vnode is altered", pVnode->vgId);
@@ -210,6 +218,7 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   pVnode->tsdbCfg.tsdbId = pVnode->vgId;
   pVnode->rootDir = strdup(rootDir);
   pVnode->accessState = TSDB_VN_ALL_ACCCESS;
+  tsem_init(&pVnode->sem, 0, 0);
 
   int32_t code = vnodeReadCfg(pVnode);
   if (code != TSDB_CODE_SUCCESS) {
@@ -290,10 +299,6 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   }
 #endif
 
-  // start continuous query
-  if (pVnode->role == TAOS_SYNC_ROLE_MASTER)
-    cqStart(pVnode->cq);
-
   pVnode->qMgmt = qOpenQueryMgmt(pVnode->vgId);
   pVnode->events = NULL;
   pVnode->status = TAOS_VN_STATUS_READY;
@@ -304,22 +309,12 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t vnodeStartStream(int32_t vnode) {
-  SVnodeObj* pVnode = vnodeAcquireVnode(vnode);
-  if (pVnode != NULL) {
-    tsdbStartStream(pVnode->tsdb);
-    vnodeRelease(pVnode);
-  }
-  return TSDB_CODE_SUCCESS;
-}
-
 int32_t vnodeClose(int32_t vgId) {
   SVnodeObj **ppVnode = (SVnodeObj **)taosHashGet(tsDnodeVnodesHash, (const char *)&vgId, sizeof(int32_t));
   if (ppVnode == NULL || *ppVnode == NULL) return 0;
 
   SVnodeObj *pVnode = *ppVnode;
   vDebug("vgId:%d, vnode will be closed", pVnode->vgId);
-  pVnode->status = TAOS_VN_STATUS_CLOSING;
   vnodeCleanUp(pVnode);
 
   return 0;
@@ -334,6 +329,8 @@ void vnodeRelease(void *pVnodeRaw) {
 
   if (refCount > 0) {
     vDebug("vgId:%d, release vnode, refCount:%d", vgId, refCount);
+    if (pVnode->status == TAOS_VN_STATUS_RESET && refCount == 2) 
+      tsem_post(&pVnode->sem);
     return;
   }
 
@@ -344,11 +341,6 @@ void vnodeRelease(void *pVnodeRaw) {
     tsdbCloseRepo(pVnode->tsdb, 1);
   pVnode->tsdb = NULL;
 
-  // stop continuous query
-  if (pVnode->cq) 
-    cqClose(pVnode->cq);
-  pVnode->cq = NULL;
-
   if (pVnode->wal) 
     walClose(pVnode->wal);
   pVnode->wal = NULL;
@@ -363,20 +355,21 @@ void vnodeRelease(void *pVnodeRaw) {
  
   tfree(pVnode->rootDir);
 
-  if (pVnode->status == TAOS_VN_STATUS_DELETING) {
+  if (pVnode->dropped) {
     char rootDir[TSDB_FILENAME_LEN] = {0};
     sprintf(rootDir, "%s/vnode%d", tsVnodeDir, vgId);
     taosMvDir(tsVnodeBakDir, rootDir);
     taosRemoveDir(rootDir);
   }
 
+  tsem_destroy(&pVnode->sem);
   free(pVnode);
 
   int32_t count = taosHashGetSize(tsDnodeVnodesHash);
   vDebug("vgId:%d, vnode is released, vnodes:%d", vgId, count);
 }
 
-void *vnodeGetVnode(int32_t vgId) {
+void *vnodeAcquire(int32_t vgId) {
   SVnodeObj **ppVnode = (SVnodeObj **)taosHashGet(tsDnodeVnodesHash, (const char *)&vgId, sizeof(int32_t));
   if (ppVnode == NULL || *ppVnode == NULL) {
     terrno = TSDB_CODE_VND_INVALID_VGROUP_ID;
@@ -384,35 +377,38 @@ void *vnodeGetVnode(int32_t vgId) {
     return NULL;
   }
 
-  return *ppVnode;
-}
-
-void *vnodeAcquireVnode(int32_t vgId) {
-  SVnodeObj *pVnode = vnodeGetVnode(vgId);
-  if (pVnode == NULL) return pVnode;
-
+  SVnodeObj *pVnode = *ppVnode;
   atomic_add_fetch_32(&pVnode->refCount, 1);
   vDebug("vgId:%d, get vnode, refCount:%d", pVnode->vgId, pVnode->refCount);
 
   return pVnode;
 }
 
-void *vnodeAcquireRqueue(void *param) {
-  SVnodeObj *pVnode = param;
+void *vnodeAcquireRqueue(int32_t vgId) {
+  SVnodeObj *pVnode = vnodeAcquire(vgId);
   if (pVnode == NULL) return NULL;
 
-  atomic_add_fetch_32(&pVnode->refCount, 1);
-  vDebug("vgId:%d, get vnode rqueue, refCount:%d", pVnode->vgId, pVnode->refCount);
-  return ((SVnodeObj *)pVnode)->rqueue;
+  if (pVnode->status == TAOS_VN_STATUS_RESET) {           
+    terrno = TSDB_CODE_VND_INVALID_STATUS;
+    vInfo("vgId:%d, status is in reset", vgId);
+    vnodeRelease(pVnode);
+    return NULL;
+  }
+
+  return pVnode->rqueue;
 }
 
-void *vnodeGetRqueue(void *pVnode) {
-  return ((SVnodeObj *)pVnode)->rqueue;
-}
-
-void *vnodeGetWqueue(int32_t vgId) {
-  SVnodeObj *pVnode = vnodeAcquireVnode(vgId);
+void *vnodeAcquireWqueue(int32_t vgId) {
+  SVnodeObj *pVnode = vnodeAcquire(vgId);
   if (pVnode == NULL) return NULL;
+
+  if (pVnode->status == TAOS_VN_STATUS_RESET) {           
+    terrno = TSDB_CODE_VND_INVALID_STATUS;
+    vInfo("vgId:%d, status is in reset", vgId);
+    vnodeRelease(pVnode);
+    return NULL;
+  }
+  
   return pVnode->wqueue;
 }
 
@@ -484,7 +480,7 @@ void vnodeBuildStatusMsg(void *param) {
 void vnodeSetAccess(SDMVgroupAccess *pAccess, int32_t numOfVnodes) {
   for (int32_t i = 0; i < numOfVnodes; ++i) {
     pAccess[i].vgId = htonl(pAccess[i].vgId);
-    SVnodeObj *pVnode = vnodeAcquireVnode(pAccess[i].vgId);
+    SVnodeObj *pVnode = vnodeAcquire(pAccess[i].vgId);
     if (pVnode != NULL) {
       pVnode->accessState = pAccess[i].accessState;
       if (pVnode->accessState != TSDB_VN_ALL_ACCCESS) {
@@ -498,17 +494,35 @@ void vnodeSetAccess(SDMVgroupAccess *pAccess, int32_t numOfVnodes) {
 static void vnodeCleanUp(SVnodeObj *pVnode) {
   // remove from hash, so new messages wont be consumed
   taosHashRemove(tsDnodeVnodesHash, (const char *)&pVnode->vgId, sizeof(int32_t));
+  int i = 0;
+
+  if (pVnode->status != TAOS_VN_STATUS_INIT) {
+    // it may be in updateing or reset state, then it shall wait
+    while (atomic_val_compare_exchange_8(&pVnode->status, TAOS_VN_STATUS_READY, TAOS_VN_STATUS_CLOSING) != TAOS_VN_STATUS_READY) {
+      if (++i % 1000 == 0) {
+        sched_yield();
+      }
+    }
+  }
 
   // stop replication module
   if (pVnode->sync) {
-    syncStop(pVnode->sync);
+    void *sync = pVnode->sync;
     pVnode->sync = NULL;
+    syncStop(sync);
+  }
+
+  // stop continuous query
+  if (pVnode->cq) {
+    void *cq = pVnode->cq;
+    pVnode->cq = NULL;
+    cqClose(cq);
   }
 
   vTrace("vgId:%d, vnode will cleanup, refCount:%d", pVnode->vgId, pVnode->refCount);
 
   // release local resources only after cutting off outside connections
-  qSetQueryMgmtClosed(pVnode->qMgmt);
+  qQueryMgmtNotifyClosed(pVnode->qMgmt);
   vnodeRelease(pVnode);
 }
 
@@ -549,18 +563,25 @@ static void vnodeNotifyRole(void *ahandle, int8_t role) {
     cqStop(pVnode->cq);
 }
 
-static void vnodeNotifyFileSynced(void *ahandle, uint64_t fversion) {
-  SVnodeObj *pVnode = ahandle;
-  vDebug("vgId:%d, data file is synced, fversion:%" PRId64, pVnode->vgId, fversion);
-
-  pVnode->fversion = fversion;
-  pVnode->version = fversion;
-  vnodeSaveVersion(pVnode);
-
+static int vnodeResetTsdb(SVnodeObj *pVnode)
+{
   char rootDir[128] = "\0";
   sprintf(rootDir, "%s/tsdb", pVnode->rootDir);
-  // clsoe tsdb, then open tsdb
-  tsdbCloseRepo(pVnode->tsdb, 0);
+
+  if (atomic_val_compare_exchange_8(&pVnode->status, TAOS_VN_STATUS_READY, TAOS_VN_STATUS_RESET) != TAOS_VN_STATUS_READY)
+    return -1;
+
+  void *tsdb = pVnode->tsdb;
+  pVnode->tsdb = NULL;
+
+  // acquire vnode
+  int32_t refCount = atomic_add_fetch_32(&pVnode->refCount, 1); 
+
+  if (refCount > 2) 
+    tsem_wait(&pVnode->sem);
+
+  // close tsdb, then open tsdb
+  tsdbCloseRepo(tsdb, 0);
   STsdbAppH appH = {0};
   appH.appH = (void *)pVnode;
   appH.notifyStatus = vnodeProcessTsdbStatus;
@@ -569,6 +590,22 @@ static void vnodeNotifyFileSynced(void *ahandle, uint64_t fversion) {
   appH.cqDropFunc = cqDrop;
   appH.configFunc = dnodeSendCfgTableToRecv;
   pVnode->tsdb = tsdbOpenRepo(rootDir, &appH);
+
+  pVnode->status = TAOS_VN_STATUS_READY;
+  vnodeRelease(pVnode);  
+
+  return 0;
+}
+
+static int vnodeNotifyFileSynced(void *ahandle, uint64_t fversion) {
+  SVnodeObj *pVnode = ahandle;
+  vDebug("vgId:%d, data file is synced, fversion:%" PRId64, pVnode->vgId, fversion);
+
+  pVnode->fversion = fversion;
+  pVnode->version = fversion;
+  vnodeSaveVersion(pVnode);
+
+  return vnodeResetTsdb(pVnode);
 }
 
 static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg) {
@@ -606,6 +643,7 @@ static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg) {
   len += snprintf(content + len, maxLen - len, "  \"precision\": %d,\n", pVnodeCfg->cfg.precision);
   len += snprintf(content + len, maxLen - len, "  \"compression\": %d,\n", pVnodeCfg->cfg.compression);
   len += snprintf(content + len, maxLen - len, "  \"walLevel\": %d,\n", pVnodeCfg->cfg.walLevel);
+  len += snprintf(content + len, maxLen - len, "  \"fsync\": %d,\n", pVnodeCfg->cfg.fsyncPeriod);
   len += snprintf(content + len, maxLen - len, "  \"replica\": %d,\n", pVnodeCfg->cfg.replications);
   len += snprintf(content + len, maxLen - len, "  \"wals\": %d,\n", pVnodeCfg->cfg.wals);
   len += snprintf(content + len, maxLen - len, "  \"quorum\": %d,\n", pVnodeCfg->cfg.quorum);
@@ -770,6 +808,13 @@ static int32_t vnodeReadCfg(SVnodeObj *pVnode) {
   }
   pVnode->walCfg.walLevel = (int8_t) walLevel->valueint;
 
+  cJSON *fsyncPeriod = cJSON_GetObjectItem(root, "fsync");
+  if (!walLevel || walLevel->type != cJSON_Number) {
+    vError("vgId:%d, failed to read vnode cfg, fsyncPeriod not found", pVnode->vgId);
+    goto PARSE_OVER;
+  }
+  pVnode->walCfg.fsyncPeriod = fsyncPeriod->valueint;
+
   cJSON *wals = cJSON_GetObjectItem(root, "wals");
   if (!wals || wals->type != cJSON_Number) {
     vError("vgId:%d, failed to read vnode cfg, wals not found", pVnode->vgId);
diff --git a/src/vnode/src/vnodeRead.c b/src/vnode/src/vnodeRead.c
index f054ae3904..973df7c5a1 100644
--- a/src/vnode/src/vnodeRead.c
+++ b/src/vnode/src/vnodeRead.c
@@ -26,6 +26,7 @@
 #include "tsdb.h"
 #include "vnode.h"
 #include "vnodeInt.h"
+#include "tqueue.h"
 
 static int32_t (*vnodeProcessReadMsgFp[TSDB_MSG_TYPE_MAX])(SVnodeObj *pVnode, SReadMsg *pReadMsg);
 static int32_t  vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg);
@@ -51,6 +52,11 @@ int32_t vnodeProcessRead(void *param, SReadMsg *pReadMsg) {
     return TSDB_CODE_VND_INVALID_STATUS; 
   }
 
+  // tsdb may be in reset state  
+  if (pVnode->tsdb == NULL) return TSDB_CODE_RPC_NOT_READY;
+  if (pVnode->status == TAOS_VN_STATUS_CLOSING)
+    return TSDB_CODE_RPC_NOT_READY;
+
   // TODO: Later, let slave to support query
   if (pVnode->syncCfg.replica > 1 && pVnode->role != TAOS_SYNC_ROLE_MASTER) {
     vDebug("vgId:%d, msgType:%s not processed, replica:%d role:%d", pVnode->vgId, taosMsg[msgType], pVnode->syncCfg.replica, pVnode->role);
@@ -60,6 +66,16 @@ int32_t vnodeProcessRead(void *param, SReadMsg *pReadMsg) {
   return (*vnodeProcessReadMsgFp[msgType])(pVnode, pReadMsg);
 }
 
+static void vnodePutItemIntoReadQueue(SVnodeObj *pVnode, void *qhandle) {
+  SReadMsg *pRead = (SReadMsg *)taosAllocateQitem(sizeof(SReadMsg));
+  pRead->rpcMsg.msgType = TSDB_MSG_TYPE_QUERY;
+  pRead->pCont = qhandle;
+  pRead->contLen = 0;
+
+  atomic_add_fetch_32(&pVnode->refCount, 1);
+  taosWriteQitem(pVnode->rqueue, TAOS_QTYPE_QUERY, pRead);
+}
+
 static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
   void    *pCont = pReadMsg->pCont;
   int32_t  contLen = pReadMsg->contLen;
@@ -82,6 +98,7 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
       vWarn("QInfo:%p invalid qhandle, no matched query handle, conn:%p", (void*) killQueryMsg->qhandle, pReadMsg->rpcMsg.handle);
     } else {
       assert(*qhandle == (void*) killQueryMsg->qhandle);
+      qKillQuery(*qhandle);
       qReleaseQInfo(pVnode->qMgmt, (void**) &qhandle, true);
     }
 
@@ -93,7 +110,7 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
 
   if (contLen != 0) {
     qinfo_t pQInfo = NULL;
-    code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, pVnode, NULL, &pQInfo);
+    code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, pVnode, &pQInfo);
 
     SQueryTableRsp *pRsp = (SQueryTableRsp *) rpcMallocCont(sizeof(SQueryTableRsp));
     pRsp->code    = code;
@@ -107,10 +124,10 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
     if (code == TSDB_CODE_SUCCESS) {
       handle = qRegisterQInfo(pVnode->qMgmt, (uint64_t) pQInfo);
       if (handle == NULL) {  // failed to register qhandle
+        vError("vgId:%d QInfo:%p register qhandle failed, return to app, code:%s", pVnode->vgId, (void *)pQInfo,
+               tstrerror(pRsp->code));
         pRsp->code = TSDB_CODE_QRY_INVALID_QHANDLE;
-
-        qKillQuery(pQInfo);
-        qKillQuery(pQInfo);
+        qDestroyQueryInfo(pQInfo);  // destroy it directly
       } else {
         assert(*handle == pQInfo);
         pRsp->qhandle = htobe64((uint64_t) pQInfo);
@@ -120,21 +137,20 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
       if (handle != NULL && vnodeNotifyCurrentQhandle(pReadMsg->rpcMsg.handle, *handle, pVnode->vgId) != TSDB_CODE_SUCCESS) {
         vError("vgId:%d, QInfo:%p, query discarded since link is broken, %p", pVnode->vgId, *handle, pReadMsg->rpcMsg.handle);
         pRsp->code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
-
-        // NOTE: there two refcount, needs to kill twice
-        // query has not been put into qhandle pool, kill it directly.
-        qKillQuery(*handle);
         qReleaseQInfo(pVnode->qMgmt, (void**) &handle, true);
         return pRsp->code;
       }
     } else {
       assert(pQInfo == NULL);
     }
+
     if (handle != NULL) {
-      dnodePutItemIntoReadQueue(pVnode, *handle);
+      vDebug("vgId:%d, QInfo:%p, dnode query msg disposed, register qhandle and return to app", vgId, *handle);
+
+      vnodePutItemIntoReadQueue(pVnode, *handle);
       qReleaseQInfo(pVnode->qMgmt, (void**) &handle, false);
     }
-    vDebug("vgId:%d, QInfo:%p, dnode query msg disposed", vgId, pQInfo);
+
   } else {
     assert(pCont != NULL);
     handle = qAcquireQInfo(pVnode->qMgmt, (uint64_t) pCont);
@@ -142,12 +158,13 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
       vWarn("QInfo:%p invalid qhandle in continuing exec query, conn:%p", (void*) pCont, pReadMsg->rpcMsg.handle);
       code = TSDB_CODE_QRY_INVALID_QHANDLE;
     } else {
-      vDebug("vgId:%d, QInfo:%p, dnode query msg in progress", pVnode->vgId, (void*) pCont);
+      vDebug("vgId:%d, QInfo:%p, dnode continue exec query", pVnode->vgId, (void*) pCont);
       code = TSDB_CODE_VND_ACTION_IN_PROGRESS;
       qTableQuery(*handle); // do execute query
     }
     qReleaseQInfo(pVnode->qMgmt, (void**) &handle, false);
   }
+
   return code;
 }
 
@@ -159,7 +176,7 @@ static int32_t vnodeProcessFetchMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
   pRetrieve->qhandle = htobe64(pRetrieve->qhandle);
   pRetrieve->free = htons(pRetrieve->free);
 
-  vDebug("vgId:%d, QInfo:%p, retrieve msg is disposed", pVnode->vgId, *(void**) pRetrieve->qhandle);
+  vDebug("vgId:%d, QInfo:%p, retrieve msg is disposed", pVnode->vgId, (void*) pRetrieve->qhandle);
 
   memset(pRet, 0, sizeof(SRspRet));
 
@@ -183,6 +200,7 @@ static int32_t vnodeProcessFetchMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
 
   if (pRetrieve->free == 1) {
     vDebug("vgId:%d, QInfo:%p, retrieve msg received to kill query and free qhandle", pVnode->vgId, *handle);
+    qKillQuery(*handle);
     qReleaseQInfo(pVnode->qMgmt, (void**) &handle, true);
 
     pRet->rsp = (SRetrieveTableRsp *)rpcMallocCont(sizeof(SRetrieveTableRsp));
@@ -206,9 +224,12 @@ static int32_t vnodeProcessFetchMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
   } else { // if failed to dump result, free qhandle immediately
     if ((code = qDumpRetrieveResult(*handle, (SRetrieveTableRsp **)&pRet->rsp, &pRet->len)) == TSDB_CODE_SUCCESS) {
       if (qHasMoreResultsToRetrieve(*handle)) {
-        dnodePutItemIntoReadQueue(pVnode, *handle);
+        vnodePutItemIntoReadQueue(pVnode, *handle);
         pRet->qhandle = *handle;
         freeHandle = false;
+      } else {
+        qKillQuery(*handle);
+        freeHandle = true;
       }
     }
   }
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index 5ed5e747f2..6b9b8ca4fd 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -59,13 +59,18 @@ int32_t vnodeProcessWrite(void *param1, int qtype, void *param2, void *item) {
     return TSDB_CODE_VND_NO_WRITE_AUTH;
   }
 
+  // tsdb may be in reset state 
+  if (pVnode->tsdb == NULL) return TSDB_CODE_RPC_NOT_READY;
+  if (pVnode->status == TAOS_VN_STATUS_CLOSING) 
+    return TSDB_CODE_RPC_NOT_READY;
+  
   if (pHead->version == 0) { // from client or CQ 
     if (pVnode->status != TAOS_VN_STATUS_READY) {
       vDebug("vgId:%d, msgType:%s not processed, vnode status is %d", pVnode->vgId, taosMsg[pHead->msgType], pVnode->status);
       return TSDB_CODE_VND_INVALID_STATUS;  // it may be in deleting or closing state
     }
 
-    if (pVnode->syncCfg.replica > 1 && pVnode->role != TAOS_SYNC_ROLE_MASTER) {
+    if (pVnode->role != TAOS_SYNC_ROLE_MASTER) {
       vDebug("vgId:%d, msgType:%s not processed, replica:%d role:%d", pVnode->vgId, taosMsg[pHead->msgType], pVnode->syncCfg.replica, pVnode->role);
       return TSDB_CODE_RPC_NOT_READY;
     }
@@ -184,6 +189,8 @@ int vnodeWriteToQueue(void *param, void *data, int type) {
   memcpy(pWal, pHead, size);
 
   atomic_add_fetch_32(&pVnode->refCount, 1);
+  vDebug("vgId:%d, get vnode wqueue, refCount:%d", pVnode->vgId, pVnode->refCount);
+
   taosWriteQitem(pVnode->wqueue, type, pWal);
 
   return 0;
diff --git a/src/wal/src/walMain.c b/src/wal/src/walMain.c
index 94a0fdc956..a0e2ccb51d 100644
--- a/src/wal/src/walMain.c
+++ b/src/wal/src/walMain.c
@@ -25,6 +25,7 @@
 #include "tlog.h"
 #include "tchecksum.h"
 #include "tutil.h"
+#include "ttimer.h"
 #include "taoserror.h"
 #include "twal.h"
 #include "tqueue.h"
@@ -34,16 +35,19 @@
 
 #define wFatal(...) { if (wDebugFlag & DEBUG_FATAL) { taosPrintLog("WAL FATAL ", 255, __VA_ARGS__); }}
 #define wError(...) { if (wDebugFlag & DEBUG_ERROR) { taosPrintLog("WAL ERROR ", 255, __VA_ARGS__); }}
-#define wWarn(...)  { if (wDebugFlag & DEBUG_WARN)  { taosPrintLog("WAL WARN  ", 255, __VA_ARGS__); }}
-#define wInfo(...)  { if (wDebugFlag & DEBUG_INFO)  { taosPrintLog("WAL INFO  ", 255, __VA_ARGS__); }}
-#define wDebug(...) { if (wDebugFlag & DEBUG_DEBUG) { taosPrintLog("WAL DEBUG ", wDebugFlag, __VA_ARGS__); }}
-#define wTrace(...) { if (wDebugFlag & DEBUG_TRACE) { taosPrintLog("WAL TRACE ", wDebugFlag, __VA_ARGS__); }}
+#define wWarn(...)  { if (wDebugFlag & DEBUG_WARN)  { taosPrintLog("WAL WARN ", 255, __VA_ARGS__); }}
+#define wInfo(...)  { if (wDebugFlag & DEBUG_INFO)  { taosPrintLog("WAL ", 255, __VA_ARGS__); }}
+#define wDebug(...) { if (wDebugFlag & DEBUG_DEBUG) { taosPrintLog("WAL ", wDebugFlag, __VA_ARGS__); }}
+#define wTrace(...) { if (wDebugFlag & DEBUG_TRACE) { taosPrintLog("WAL ", wDebugFlag, __VA_ARGS__); }}
 
 typedef struct {
   uint64_t version;
   int      fd;
   int      keep;
   int      level;
+  int32_t  fsyncPeriod;
+  void    *timer;
+  void    *signature;
   int      max;  // maximum number of wal files
   uint32_t id;   // increase continuously
   int      num;  // number of wal files
@@ -52,10 +56,23 @@ typedef struct {
   pthread_mutex_t mutex;
 } SWal;
 
+static void    *walTmrCtrl = NULL;
+static int     tsWalNum = 0;
+static pthread_once_t walModuleInit = PTHREAD_ONCE_INIT;
 static uint32_t walSignature = 0xFAFBFDFE;
-static int walHandleExistingFiles(const char *path);
-static int walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp);
-static int walRemoveWalFiles(const char *path);
+static int  walHandleExistingFiles(const char *path);
+static int  walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp);
+static int  walRemoveWalFiles(const char *path);
+static void walProcessFsyncTimer(void *param, void *tmrId);
+static void walRelease(SWal *pWal);
+
+static void walModuleInitFunc() {
+  walTmrCtrl = taosTmrInit(1000, 100, 300000, "WAL");
+  if (walTmrCtrl == NULL) 
+    walModuleInit = PTHREAD_ONCE_INIT;
+  else
+    wDebug("WAL module is initialized");
+}
 
 void *walOpen(const char *path, const SWalCfg *pCfg) {
   SWal *pWal = calloc(sizeof(SWal), 1);
@@ -64,20 +81,38 @@ void *walOpen(const char *path, const SWalCfg *pCfg) {
     return NULL;
   }
 
+  pthread_once(&walModuleInit, walModuleInitFunc);
+  if (walTmrCtrl == NULL) {
+    free(pWal);
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return NULL;
+  }
+
+  atomic_add_fetch_32(&tsWalNum, 1);    
   pWal->fd = -1;
   pWal->max = pCfg->wals;
   pWal->id = 0;
   pWal->num = 0;
   pWal->level = pCfg->walLevel;
   pWal->keep = pCfg->keep;
+  pWal->fsyncPeriod = pCfg->fsyncPeriod;
+  pWal->signature = pWal;
   tstrncpy(pWal->path, path, sizeof(pWal->path));
   pthread_mutex_init(&pWal->mutex, NULL);
 
+  if (pWal->fsyncPeriod > 0  && pWal->level == TAOS_WAL_FSYNC) {
+    pWal->timer = taosTmrStart(walProcessFsyncTimer, pWal->fsyncPeriod, pWal, walTmrCtrl);
+    if (pWal->timer == NULL) {
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      walRelease(pWal);
+      return NULL;
+    }
+  }
+
   if (tmkdir(path, 0755) != 0) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     wError("wal:%s, failed to create directory(%s)", path, strerror(errno));
-    pthread_mutex_destroy(&pWal->mutex);
-    free(pWal);
+    walRelease(pWal);
     pWal = NULL;
   }
      
@@ -89,12 +124,11 @@ void *walOpen(const char *path, const SWalCfg *pCfg) {
   if (pWal && pWal->fd <0) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     wError("wal:%s, failed to open(%s)", path, strerror(errno));
-    pthread_mutex_destroy(&pWal->mutex);
-    free(pWal);
+    walRelease(pWal);
     pWal = NULL;
   } 
 
-  if (pWal) wDebug("wal:%s, it is open, level:%d", path, pWal->level);
+  if (pWal) wDebug("wal:%s, it is open, level:%d fsyncPeriod:%d", path, pWal->level, pWal->fsyncPeriod);
   return pWal;
 }
 
@@ -102,7 +136,8 @@ void walClose(void *handle) {
   if (handle == NULL) return;
   
   SWal *pWal = handle;  
-  close(pWal->fd);
+  tclose(pWal->fd);
+  if (pWal->timer) taosTmrStopA(&pWal->timer);
 
   if (pWal->keep == 0) {
     // remove all files in the directory
@@ -118,9 +153,7 @@ void walClose(void *handle) {
     wDebug("wal:%s, it is closed and kept", pWal->name);
   }
 
-  pthread_mutex_destroy(&pWal->mutex);
-
-  free(pWal);
+  walRelease(pWal);
 }
 
 int walRenew(void *handle) {
@@ -194,9 +227,9 @@ int walWrite(void *handle, SWalHead *pHead) {
 void walFsync(void *handle) {
 
   SWal *pWal = handle;
-  if (pWal == NULL) return;
+  if (pWal == NULL || pWal->level != TAOS_WAL_FSYNC || pWal->fd < 0) return;
 
-  if (pWal->level == TAOS_WAL_FSYNC && pWal->fd >=0) {
+  if (pWal->fsyncPeriod == 0) {
     if (fsync(pWal->fd) < 0) {
       wError("wal:%s, fsync failed(%s)", pWal->name, strerror(errno));
     }
@@ -303,6 +336,20 @@ int walGetWalFile(void *handle, char *name, uint32_t *index) {
   return code;
 }  
 
+static void walRelease(SWal *pWal) {
+
+  pthread_mutex_destroy(&pWal->mutex);
+  pWal->signature = NULL;
+  free(pWal);
+
+  if (atomic_sub_fetch_32(&tsWalNum, 1) == 0) {
+    if (walTmrCtrl) taosTmrCleanUp(walTmrCtrl);
+    walTmrCtrl = NULL;
+    walModuleInit = PTHREAD_ONCE_INIT;
+    wDebug("WAL module is cleaned up");
+  }
+}
+
 static int walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp) {
   char *name = pWal->name;
 
@@ -433,3 +480,15 @@ static int walRemoveWalFiles(const char *path) {
   return terrno;
 }
 
+static void walProcessFsyncTimer(void *param, void *tmrId) {
+  SWal *pWal = param;
+
+  if (pWal->signature != pWal) return;
+  if (pWal->fd < 0) return;
+
+  if (fsync(pWal->fd) < 0) {
+    wError("wal:%s, fsync failed(%s)", pWal->name, strerror(errno));
+  }
+  
+  pWal->timer = taosTmrStart(walProcessFsyncTimer, pWal->fsyncPeriod, pWal, walTmrCtrl);
+}
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a6070a2fc1..4e7e9a87ea 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -12,3 +12,4 @@ SET(CMAKE_VERBOSE_MAKEFILE ON)
 ADD_SUBDIRECTORY(examples/c)
 ADD_SUBDIRECTORY(tsim)
 ADD_SUBDIRECTORY(test/c)
+ADD_SUBDIRECTORY(comparisonTest/tdengine)
diff --git a/tests/comparisonTest/tdengine/CMakeLists.txt b/tests/comparisonTest/tdengine/CMakeLists.txt
new file mode 100644
index 0000000000..ccdeefcdaf
--- /dev/null
+++ b/tests/comparisonTest/tdengine/CMakeLists.txt
@@ -0,0 +1,12 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+PROJECT(TDengine)
+
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/util/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/common/inc)
+INCLUDE_DIRECTORIES(${TD_OS_DIR}/inc)
+
+IF ((TD_LINUX_64) OR (TD_LINUX_32 AND TD_ARM))
+  add_executable(tdengineTest tdengineTest.c)
+  target_link_libraries(tdengineTest taos_static tutil common pthread)
+ENDIF()
diff --git a/tests/comparisonTest/tdengine/tdengineTest.c b/tests/comparisonTest/tdengine/tdengineTest.c
index a2b048214f..de92526337 100644
--- a/tests/comparisonTest/tdengine/tdengineTest.c
+++ b/tests/comparisonTest/tdengine/tdengineTest.c
@@ -7,6 +7,7 @@
 #include <time.h>
 #include <pthread.h>
 #include <sys/time.h>
+#include <inttypes.h>
 
 typedef struct {
   char sql[256];
@@ -123,19 +124,21 @@ void writeDataImp(void *param) {
   if (taos == NULL)
     taos_error(taos);
 
-  int code = taos_query(taos, "use db");
+  TAOS_RES* result = taos_query(taos, "use db");
+  int32_t code = taos_errno(result);
   if (code != 0) {
     taos_error(taos);
   }
+  taos_free_result(result);
 
-  char sql[65000];
+  char *sql = calloc(1, 8*1024*1024);
   int sqlLen = 0;
   int lastMachineid = 0;
   int counter = 0;
   int totalRecords = 0;
 
   for (int j = pThread->sID; j <= pThread->eID; j++) {
-    char fileName[256];
+    char fileName[300];
     sprintf(fileName, "%s/testdata%d.csv", arguments.dataDir, j);
 
     FILE *fp = fopen(fileName, "r");
@@ -162,7 +165,7 @@ void writeDataImp(void *param) {
       int64_t timestamp;
       int temperature;
       float humidity;
-      sscanf(line, "%d%s%d%lld%d%f", &machineid, machinename, &machinegroup, &timestamp, &temperature, &humidity);
+      sscanf(line, "%d%s%d%" PRId64 "%d%f", &machineid, machinename, &machinegroup, &timestamp, &temperature, &humidity);
 
       if (counter == 0) {
         sqlLen = sprintf(sql, "insert into");
@@ -174,14 +177,16 @@ void writeDataImp(void *param) {
                           machineid, machineid, machinename, machinegroup);
       }
 
-      sqlLen += sprintf(sql + sqlLen, "(%lld,%d,%f)", timestamp, temperature, humidity);
+      sqlLen += sprintf(sql + sqlLen, "(%" PRId64 ",%d,%f)", timestamp, temperature, humidity);
       counter++;
 
       if (counter >= arguments.rowsPerRequest) {
-        int code = taos_query(taos, sql);
+        TAOS_RES *result = taos_query(taos, sql);
+        int32_t   code = taos_errno(result);
         if (code != 0) {
-          printf("thread:%d error:%d reason:%s\n", pThread->pid, code, taos_errstr(taos));
+          printf("thread:%d error:%d reason:%s\n", pThread->threadId, code, taos_errstr(taos));
         }
+        taos_free_result(result);
 
         totalRecords += counter;
         counter = 0;
@@ -194,15 +199,18 @@ void writeDataImp(void *param) {
   }
 
   if (counter > 0) {
-    int code = taos_query(taos, sql);
+    TAOS_RES *result = taos_query(taos, sql);
+    int32_t   code = taos_errno(result);
     if (code != 0) {
-      printf("thread:%d error:%d reason:%s\n", pThread->pid, code, taos_errstr(taos));
+      printf("thread:%d error:%d reason:%s\n", pThread->threadId, code, taos_errstr(taos));
     }
+    taos_free_result(result);
 
     totalRecords += counter;
   }
 
   __sync_fetch_and_add(&statis.totalRows, totalRecords);
+  free(sql);
 }
 
 void writeData() {
@@ -215,19 +223,23 @@ void writeData() {
   taos_init();
 
   void *taos = taos_connect("127.0.0.1", "root", "taosdata", NULL, 0);
-  if (taos == NULL)
-    taos_error(taos);
+  if (taos == NULL) taos_error(taos);
 
-  int code = taos_query(taos, "create database if not exists db");
+  TAOS_RES *result = taos_query(taos, "create database if not exists db");
+  int32_t   code = taos_errno(result);
   if (code != 0) {
     taos_error(taos);
   }
+  taos_free_result(result);
 
-  code = taos_query(taos, "create table if not exists db.devices(ts timestamp, temperature int, humidity float) "
-    "tags(devid int, devname binary(16), devgroup int)");
+  result = taos_query(taos,
+                      "create table if not exists db.devices(ts timestamp, temperature int, humidity float) "
+                      "tags(devid int, devname binary(16), devgroup int)");
+  code = taos_errno(result);
   if (code != 0) {
     taos_error(taos);
   }
+  taos_free_result(result);
 
   int64_t st = getTimeStampMs();
 
@@ -292,17 +304,12 @@ void readData() {
 
     int64_t st = getTimeStampMs();
 
-    int code = taos_query(taos, line);
+    TAOS_RES *result = taos_query(taos, line);
+    int32_t   code = taos_errno(result);
     if (code != 0) {
       taos_error(taos);
     }
 
-    void *result = taos_use_result(taos);
-    if (result == NULL) {
-      printf("failed to get result, reason:%s\n", taos_errstr(taos));
-      exit(1);
-    }
-
     TAOS_ROW row;
     int rows = 0;
     //int num_fields = taos_field_count(taos);
diff --git a/tests/pytest/crash_gen.py b/tests/pytest/crash_gen.py
index 9af72af471..9e38e04b63 100755
--- a/tests/pytest/crash_gen.py
+++ b/tests/pytest/crash_gen.py
@@ -84,8 +84,17 @@ class WorkerThread:
         # Let us have a DB connection of our own
         if (gConfig.per_thread_db_connection):  # type: ignore
             # print("connector_type = {}".format(gConfig.connector_type))
-            self._dbConn = DbConn.createNative() if (
-                gConfig.connector_type == 'native') else DbConn.createRest()
+            if gConfig.connector_type == 'native':
+                self._dbConn = DbConn.createNative() 
+            elif gConfig.connector_type == 'rest':
+                self._dbConn = DbConn.createRest() 
+            elif gConfig.connector_type == 'mixed':
+                if Dice.throw(2) == 0: # 1/2 chance
+                    self._dbConn = DbConn.createNative() 
+                else:
+                    self._dbConn = DbConn.createRest() 
+            else:
+                raise RuntimeError("Unexpected connector type: {}".format(gConfig.connector_type))
 
         self._dbInUse = False  # if "use db" was executed already
 
@@ -130,22 +139,15 @@ class WorkerThread:
         while True:
             tc = self._tc  # Thread Coordinator, the overall master
             tc.crossStepBarrier()  # shared barrier first, INCLUDING the last one
-            logger.debug(
-                "[TRD] Worker thread [{}] exited barrier...".format(
-                    self._tid))
+            logger.debug("[TRD] Worker thread [{}] exited barrier...".format(self._tid))
             self.crossStepGate()   # then per-thread gate, after being tapped
-            logger.debug(
-                "[TRD] Worker thread [{}] exited step gate...".format(
-                    self._tid))
+            logger.debug("[TRD] Worker thread [{}] exited step gate...".format(self._tid))
             if not self._tc.isRunning():
-                logger.debug(
-                    "[TRD] Thread Coordinator not running any more, worker thread now stopping...")
+                logger.debug("[TRD] Thread Coordinator not running any more, worker thread now stopping...")
                 break
 
             # Fetch a task from the Thread Coordinator
-            logger.debug(
-                "[TRD] Worker thread [{}] about to fetch task".format(
-                    self._tid))
+            logger.debug( "[TRD] Worker thread [{}] about to fetch task".format(self._tid))
             task = tc.fetchTask()
 
             # Execute such a task
@@ -154,9 +156,7 @@ class WorkerThread:
                     self._tid, task.__class__.__name__))
             task.execute(self)
             tc.saveExecutedTask(task)
-            logger.debug(
-                "[TRD] Worker thread [{}] finished executing task".format(
-                    self._tid))
+            logger.debug("[TRD] Worker thread [{}] finished executing task".format(self._tid))
 
             self._dbInUse = False  # there may be changes between steps
 
@@ -255,101 +255,124 @@ class ThreadCoordinator:
         self._runStatus = MainExec.STATUS_STOPPING
         self._execStats.registerFailure("User Interruption")
 
+    def _runShouldEnd(self, transitionFailed, hasAbortedTask):
+        maxSteps = gConfig.max_steps  # type: ignore
+        if self._curStep >= (maxSteps - 1): # maxStep==10, last curStep should be 9
+            return True
+        if self._runStatus != MainExec.STATUS_RUNNING:
+            return True
+        if transitionFailed:
+            return True
+        if hasAbortedTask:
+            return True
+        return False
+
+    def _hasAbortedTask(self): # from execution of previous step
+        for task in self._executedTasks:
+            if task.isAborted():
+                # print("Task aborted: {}".format(task))
+                # hasAbortedTask = True
+                return True
+        return False
+
+    def _releaseAllWorkerThreads(self, transitionFailed):
+        self._curStep += 1  # we are about to get into next step. TODO: race condition here!
+        # Now not all threads had time to go to sleep
+        logger.debug(
+            "--\r\n\n--> Step {} starts with main thread waking up".format(self._curStep))
+
+        # A new TE for the new step
+        self._te = None # set to empty first, to signal worker thread to stop
+        if not transitionFailed:  # only if not failed
+            self._te = TaskExecutor(self._curStep)
+
+        logger.debug("[TRD] Main thread waking up at step {}, tapping worker threads".format(
+                self._curStep))  # Now not all threads had time to go to sleep
+        # Worker threads will wake up at this point, and each execute it's own task
+        self.tapAllThreads() # release all worker thread from their "gate"
+
+    def _syncAtBarrier(self):
+         # Now main thread (that's us) is ready to enter a step
+        # let other threads go past the pool barrier, but wait at the
+        # thread gate
+        logger.debug("[TRD] Main thread about to cross the barrier")
+        self.crossStepBarrier()
+        self._stepBarrier.reset()  # Other worker threads should now be at the "gate"
+        logger.debug("[TRD] Main thread finished crossing the barrier")
+
+    def _doTransition(self):
+        transitionFailed = False
+        try:
+            sm = self._dbManager.getStateMachine()
+            logger.debug("[STT] starting transitions")
+            # at end of step, transiton the DB state
+            sm.transition(self._executedTasks)
+            logger.debug("[STT] transition ended")
+            # Due to limitation (or maybe not) of the Python library,
+            # we cannot share connections across threads
+            if sm.hasDatabase():
+                for t in self._pool.threadList:
+                    logger.debug("[DB] use db for all worker threads")
+                    t.useDb()
+                    # t.execSql("use db") # main thread executing "use
+                    # db" on behalf of every worker thread
+        except taos.error.ProgrammingError as err:
+            if (err.msg == 'network unavailable'):  # broken DB connection
+                logger.info("DB connection broken, execution failed")
+                traceback.print_stack()
+                transitionFailed = True
+                self._te = None  # Not running any more
+                self._execStats.registerFailure("Broken DB Connection")
+                # continue # don't do that, need to tap all threads at
+                # end, and maybe signal them to stop
+            else:
+                raise
+
+        self.resetExecutedTasks()  # clear the tasks after we are done
+        # Get ready for next step
+        logger.debug("<-- Step {} finished, trasition failed = {}".format(self._curStep, transitionFailed))
+        return transitionFailed
+
     def run(self):
         self._pool.createAndStartThreads(self)
 
         # Coordinate all threads step by step
         self._curStep = -1  # not started yet
-        maxSteps = gConfig.max_steps  # type: ignore
+        
         self._execStats.startExec()  # start the stop watch
         transitionFailed = False
         hasAbortedTask = False
-        while(self._curStep < maxSteps - 1 and
-              (not transitionFailed) and
-              (self._runStatus == MainExec.STATUS_RUNNING) and
-                (not hasAbortedTask)):  # maxStep==10, last curStep should be 9
-
-            if not gConfig.debug:
-                # print this only if we are not in debug mode
+        while not self._runShouldEnd(transitionFailed, hasAbortedTask):
+            if not gConfig.debug: # print this only if we are not in debug mode                
                 print(".", end="", flush=True)
-            logger.debug("[TRD] Main thread going to sleep")
-
-            # Now main thread (that's us) is ready to enter a step
-            # let other threads go past the pool barrier, but wait at the
-            # thread gate
-            self.crossStepBarrier()
-            self._stepBarrier.reset()  # Other worker threads should now be at the "gate"
+                        
+            self._syncAtBarrier() # For now just cross the barrier
 
             # At this point, all threads should be pass the overall "barrier" and before the per-thread "gate"
             # We use this period to do house keeping work, when all worker
             # threads are QUIET.
-            hasAbortedTask = False
-            for task in self._executedTasks:
-                if task.isAborted():
-                    print("Task aborted: {}".format(task))
-                    hasAbortedTask = True
-                    break
-
-            if hasAbortedTask:  # do transition only if tasks are error free
+            hasAbortedTask = self._hasAbortedTask() # from previous step
+            if hasAbortedTask: 
+                logger.info("Aborted task encountered, exiting test program")
                 self._execStats.registerFailure("Aborted Task Encountered")
-            else:
-                try:
-                    sm = self._dbManager.getStateMachine()
-                    logger.debug("[STT] starting transitions")
-                    # at end of step, transiton the DB state
-                    sm.transition(self._executedTasks)
-                    logger.debug("[STT] transition ended")
-                    # Due to limitation (or maybe not) of the Python library,
-                    # we cannot share connections across threads
-                    if sm.hasDatabase():
-                        for t in self._pool.threadList:
-                            logger.debug("[DB] use db for all worker threads")
-                            t.useDb()
-                            # t.execSql("use db") # main thread executing "use
-                            # db" on behalf of every worker thread
-                except taos.error.ProgrammingError as err:
-                    if (err.msg == 'network unavailable'):  # broken DB connection
-                        logger.info("DB connection broken, execution failed")
-                        traceback.print_stack()
-                        transitionFailed = True
-                        self._te = None  # Not running any more
-                        self._execStats.registerFailure("Broken DB Connection")
-                        # continue # don't do that, need to tap all threads at
-                        # end, and maybe signal them to stop
-                    else:
-                        raise
-            # finally:
-            #     pass
+                break # do transition only if tasks are error free
 
-            self.resetExecutedTasks()  # clear the tasks after we are done
+            # Ending previous step
+            transitionFailed = self._doTransition() # To start, we end step -1 first
+            # Then we move on to the next step
+            self._releaseAllWorkerThreads(transitionFailed)                    
 
-            # Get ready for next step
-            logger.debug("<-- Step {} finished".format(self._curStep))
-            self._curStep += 1  # we are about to get into next step. TODO: race condition here!
-            # Now not all threads had time to go to sleep
-            logger.debug(
-                "\r\n\n--> Step {} starts with main thread waking up".format(self._curStep))
+        if hasAbortedTask or transitionFailed : # abnormal ending, workers waiting at "gate"
+            logger.debug("Abnormal ending of main thraed")
+        else: # regular ending, workers waiting at "barrier"
+            logger.debug("Regular ending, main thread waiting for all worker threads to stop...")
+            self._syncAtBarrier()
 
-            # A new TE for the new step
-            if not transitionFailed:  # only if not failed
-                self._te = TaskExecutor(self._curStep)
-
-            logger.debug(
-                "[TRD] Main thread waking up at step {}, tapping worker threads".format(
-                    self._curStep))  # Now not all threads had time to go to sleep
-            # Worker threads will wake up at this point, and each execute it's
-            # own task
-            self.tapAllThreads()
-
-        logger.debug("Main thread ready to finish up...")
-        if not transitionFailed:  # only in regular situations
-            self.crossStepBarrier()  # Cross it one last time, after all threads finish
-            self._stepBarrier.reset()
-            logger.debug("Main thread in exclusive zone...")
-            self._te = None  # No more executor, time to end
-            logger.debug("Main thread tapping all threads one last time...")
-            self.tapAllThreads()  # Let the threads run one last time
+        self._te = None  # No more executor, time to end
+        logger.debug("Main thread tapping all threads one last time...")
+        self.tapAllThreads()  # Let the threads run one last time
 
+        logger.debug("\r\n\n--> Main thread ready to finish up...")
         logger.debug("Main thread joining all threads")
         self._pool.joinAll()  # Get all threads to finish
         logger.info("\nAll worker threads finished")
@@ -514,7 +537,7 @@ class LinearQueue():
 
 class DbConn:
     TYPE_NATIVE = "native-c"
-    TYPE_REST = "rest-api"
+    TYPE_REST =   "rest-api"
     TYPE_INVALID = "invalid"
 
     @classmethod
@@ -620,9 +643,13 @@ class DbConnRest(DbConn):
         self.isOpen = False
 
     def _doSql(self, sql):
-        r = requests.post(self._url,
-                          data=sql,
-                          auth=HTTPBasicAuth('root', 'taosdata'))
+        try:
+            r = requests.post(self._url, 
+                data = sql,
+                auth = HTTPBasicAuth('root', 'taosdata'))            
+        except:
+            print("REST API Failure (TODO: more info here)")
+            raise
         rj = r.json()
         # Sanity check for the "Json Result"
         if ('status' not in rj):
@@ -717,7 +744,7 @@ class MyTDSql:
 class DbConnNative(DbConn):
     def __init__(self):
         super().__init__()
-        self._type = self.TYPE_REST
+        self._type = self.TYPE_NATIVE
         self._conn = None
         self._cursor = None
 
@@ -736,10 +763,16 @@ class DbConnNative(DbConn):
                     break
         return buildPath
 
+    connInfoDisplayed = False
     def openByType(self):  # Open connection
         cfgPath = self.getBuildPath() + "/test/cfg"
+        hostAddr = "127.0.0.1"
+        if not self.connInfoDisplayed:
+            logger.info("Initiating TAOS native connection to {}, using config at {}".format(hostAddr, cfgPath))
+            self.connInfoDisplayed = True
+
         self._conn = taos.connect(
-            host="127.0.0.1",
+            host=hostAddr,
             config=cfgPath)  # TODO: make configurable
         self._cursor = self._conn.cursor()
 
@@ -2254,8 +2287,9 @@ class ClientManager:
 
     def sigIntHandler(self, signalNumber, frame):
         if self._status != MainExec.STATUS_RUNNING:
-            print("Ignoring repeated SIGINT...")
-            return  # do nothing if it's already not running
+            print("Repeated SIGINT received, forced exit...")
+            # return  # do nothing if it's already not running
+            sys.exit(-1)
         self._status = MainExec.STATUS_STOPPING  # immediately set our status
 
         print("Terminating program...")
@@ -2394,6 +2428,27 @@ def main():
 
             '''))
 
+    # parser.add_argument('-a', '--auto-start-service', action='store_true',                        
+    #                     help='Automatically start/stop the TDengine service (default: false)')
+    # parser.add_argument('-c', '--connector-type', action='store', default='native', type=str,
+    #                     help='Connector type to use: native, rest, or mixed (default: 10)')
+    # parser.add_argument('-d', '--debug', action='store_true',                        
+    #                     help='Turn on DEBUG mode for more logging (default: false)')
+    # parser.add_argument('-e', '--run-tdengine', action='store_true',                        
+    #                     help='Run TDengine service in foreground (default: false)')
+    # parser.add_argument('-l', '--larger-data', action='store_true',                        
+    #                     help='Write larger amount of data during write operations (default: false)')
+    # parser.add_argument('-p', '--per-thread-db-connection', action='store_true',                        
+    #                     help='Use a single shared db connection (default: false)')
+    # parser.add_argument('-r', '--record-ops', action='store_true',                        
+    #                     help='Use a pair of always-fsynced fils to record operations performing + performed, for power-off tests (default: false)')                    
+    # parser.add_argument('-s', '--max-steps', action='store', default=1000, type=int,
+    #                     help='Maximum number of steps to run (default: 100)')
+    # parser.add_argument('-t', '--num-threads', action='store', default=5, type=int,
+    #                     help='Number of threads to run (default: 10)')
+    # parser.add_argument('-x', '--continue-on-exception', action='store_true',                        
+    #                     help='Continue execution after encountering unexpected/disallowed errors/exceptions (default: false)')                        
+
     parser.add_argument(
         '-a',
         '--auto-start-service',
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index 5ee33c421e..9d1aef0dc5 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -143,6 +143,7 @@ python3 ./test.py -f query/filterOtherTypes.py
 python3 ./test.py -f query/querySort.py
 python3 ./test.py -f query/queryJoin.py
 python3 ./test.py -f query/select_last_crash.py
+python3 ./test.py -f query/queryNullValueTest.py
 
 #stream
 python3 ./test.py -f stream/metric_1.py
diff --git a/tests/pytest/query/queryInsertValue.py b/tests/pytest/query/queryInsertValue.py
new file mode 100644
index 0000000000..856801b4ee
--- /dev/null
+++ b/tests/pytest/query/queryInsertValue.py
@@ -0,0 +1,65 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+import numpy as np
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+        
+        self.numOfRecords = 10
+        self.ts = 1537146000000    
+    
+    def restartTaosd(self):
+        tdDnodes.stop(1)
+        tdDnodes.start(1)
+        tdSql.execute("use db")
+
+    def run(self):
+        tdSql.prepare()
+
+        print("==============step1")
+
+        tdSql.execute(
+            "create table st (ts timestamp, speed int) tags(areaid int, loc nchar(20))")
+        tdSql.execute("create table t1 using st tags(1, 'beijing')")
+        tdSql.execute("insert into t1 values(now, 1)")
+        tdSql.query("select * from st")
+        tdSql.checkRows(1)
+
+        tdSql.execute("alter table st add column length int")
+        tdSql.execute("insert into t1 values(now, 1, 2)")
+        tdSql.query("select last(*) from st")
+        tdSql.checkData(0, 2, 2);
+
+        self.restartTaosd();
+
+        tdSql.query("select last(*) from st")
+        tdSql.checkData(0, 2, 2);
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/query/queryNullValueTest.py b/tests/pytest/query/queryNullValueTest.py
new file mode 100644
index 0000000000..2ad1979e0b
--- /dev/null
+++ b/tests/pytest/query/queryNullValueTest.py
@@ -0,0 +1,181 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+import numpy as np
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+        
+        self.numOfRecords = 10
+        self.ts = 1537146000000
+
+    def checkNullValue(self, result):
+        mx = np.array(result)
+        [rows, cols] = mx.shape
+        for i in range(rows):
+            for j in range(cols):
+                if j + 1 < cols and mx[i, j + 1] is not None:
+                    print(mx[i, j + 1])
+                    return False
+        return True
+    
+    def restartTaosd(self):
+        tdDnodes.stop(1)
+        tdDnodes.start(1)
+        tdSql.execute("use db")
+
+    def run(self):
+        tdSql.prepare()
+
+        print("==============step1")
+
+        tdSql.execute(
+            "create table meters (ts timestamp, col1 int) tags(tgcol1 int)")
+        tdSql.execute("create table t0 using meters tags(NULL)")
+
+        for i in range (self.numOfRecords):
+            tdSql.execute("insert into t0 values (%d, %d)" % (self.ts + i, i));
+
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col2 tinyint")
+        tdSql.execute("alter table meters drop column col1")        
+        tdSql.query("select * from meters")        
+        tdSql.checkRows(10)
+        tdSql.query("select col2 from meters")        
+        tdSql.checkRows(10)        
+
+        tdSql.execute("alter table meters add column col1 int")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col1 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col3 smallint")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col3 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col4 bigint")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col4 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col5 float")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col5 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col6 double")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col6 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col7 bool")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col7 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col8 binary(20)")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col8 from meters")        
+        tdSql.checkRows(10)
+
+        tdSql.execute("alter table meters add column col9 nchar(20)")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select col9 from meters")        
+        tdSql.checkRows(10)
+        
+        tdSql.execute("alter table meters add tag tgcol2 tinyint")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol2 from meters")
+        tdSql.checkRows(1)
+                
+
+        tdSql.execute("alter table meters add tag tgcol3 smallint")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol3 from meters")
+        tdSql.checkRows(1)
+        
+
+        tdSql.execute("alter table meters add tag tgcol4 bigint")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol4 from meters")
+        tdSql.checkRows(1)
+
+        tdSql.execute("alter table meters add tag tgcol5 float")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol5 from meters")
+        tdSql.checkRows(1)
+
+        tdSql.execute("alter table meters add tag tgcol6 double")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol6 from meters")
+        tdSql.checkRows(1)
+
+        tdSql.execute("alter table meters add tag tgcol7 bool")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol7 from meters")
+        tdSql.checkRows(1)
+
+        tdSql.execute("alter table meters add tag tgcol8 binary(20)")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol8 from meters")
+        tdSql.checkRows(1)
+
+        tdSql.execute("alter table meters add tag tgcol9 nchar(20)")
+        tdSql.query("select * from meters")
+        tdSql.checkRows(10)
+        tdSql.query("select tgcol9 from meters")
+        tdSql.checkRows(1)
+
+        self.restartTaosd()
+        tdSql.query("select * from meters")        
+        tdSql.checkRows(10)
+        if self.checkNullValue(tdSql.queryResult) is False:
+            tdLog.exit("non None value is detected")
+
+
+        
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/regressiontest.sh b/tests/pytest/regressiontest.sh
index ccc6635ced..24cd93f0fc 100755
--- a/tests/pytest/regressiontest.sh
+++ b/tests/pytest/regressiontest.sh
@@ -140,6 +140,7 @@ python3 ./test.py -f query/queryJoin.py
 python3 ./test.py -f query/filterCombo.py
 python3 ./test.py -f query/queryNormal.py
 python3 ./test.py -f query/select_last_crash.py
+python3 ./test.py -f query/queryNullValueTest.py
 
 #stream
 python3 ./test.py -f stream/stream1.py
diff --git a/tests/pytest/table/del_stable.py b/tests/pytest/table/del_stable.py
index e458b6679f..1b078ac519 100644
--- a/tests/pytest/table/del_stable.py
+++ b/tests/pytest/table/del_stable.py
@@ -37,17 +37,8 @@ class TDTestCase:
         except Exception as e:
             tdLog.exit(e)
 
-        try:
-            tdSql.execute("select * from db.st")
-        except Exception as e:
-            if e.args[0] != 'mnode invalid table name':
-                tdLog.exit(e)
-
-        try:
-            tdSql.execute("select * from db.tb")
-        except Exception as e:
-            if e.args[0] != 'mnode invalid table name':
-                tdLog.exit(e)
+        tdSql.error("select * from db.st")
+        tdSql.error("select * from db.tb")
 
     def stop(self):
         tdSql.close()
diff --git a/tests/pytest/tag_lite/add.py b/tests/pytest/tag_lite/add.py
index b23ff350c3..49e2f8ab69 100644
--- a/tests/pytest/tag_lite/add.py
+++ b/tests/pytest/tag_lite/add.py
@@ -100,6 +100,8 @@ class TDTestCase:
         # TSIM: sql alter table $mt add tag tgcol4 int
         tdLog.info('alter table %s add tag tgcol4 int' % (mt))
         tdSql.execute('alter table %s add tag tgcol4 int' % (mt))
+        tdLog.info('select * from %s where tgcol4=6' % (mt))
+        tdSql.query('select * from %s where tgcol4=6' % (mt))
         # TSIM: sql reset query cache
         tdLog.info('reset query cache')
         tdSql.execute('reset query cache')
diff --git a/tests/pytest/util/dnodes-no-random-fail.py b/tests/pytest/util/dnodes-no-random-fail.py
new file mode 100644
index 0000000000..88b2049464
--- /dev/null
+++ b/tests/pytest/util/dnodes-no-random-fail.py
@@ -0,0 +1,501 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import os
+import os.path
+import subprocess
+from util.log import *
+
+
+class TDSimClient:
+    def __init__(self):
+        self.testCluster = False
+
+        self.cfgDict = {
+            "numOfLogLines": "100000000",
+            "numOfThreadsPerCore": "2.0",
+            "locale": "en_US.UTF-8",
+            "charset": "UTF-8",
+            "asyncLog": "0",
+            "anyIp": "0",
+            "sdbDebugFlag": "135",
+            "rpcDebugFlag": "135",
+            "tmrDebugFlag": "131",
+            "cDebugFlag": "135",
+            "udebugFlag": "135",
+            "jnidebugFlag": "135",
+            "qdebugFlag": "135",
+            }
+
+    def init(self, path):
+        self.__init__()
+        self.path = path
+
+    def getLogDir(self):
+        self.logDir = "%s/sim/psim/log" % (self.path)
+        return self.logDir
+
+    def getCfgDir(self):
+        self.cfgDir = "%s/sim/psim/cfg" % (self.path)
+        return self.cfgDir
+
+    def setTestCluster(self, value):
+        self.testCluster = value
+
+    def addExtraCfg(self, option, value):
+        self.cfgDict.update({option: value})
+
+    def cfg(self, option, value):
+        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+    def deploy(self):
+        self.logDir = "%s/sim/psim/log" % (self.path)
+        self.cfgDir = "%s/sim/psim/cfg" % (self.path)
+        self.cfgPath = "%s/sim/psim/cfg/taos.cfg" % (self.path)
+
+        cmd = "rm -rf " + self.logDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+    
+        cmd = "mkdir -p " + self.logDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "rm -rf " + self.cfgDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "mkdir -p " + self.cfgDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "touch " + self.cfgPath
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        if self.testCluster:
+            self.cfg("masterIp", "192.168.0.1")
+            self.cfg("secondIp", "192.168.0.2")
+        self.cfg("logDir", self.logDir)
+
+        for key, value in self.cfgDict.items():
+            self.cfg(key, value)
+
+        tdLog.debug("psim is deployed and configured by %s" % (self.cfgPath))
+
+
+class TDDnode:
+    def __init__(self, index):
+        self.index = index
+        self.running = 0
+        self.deployed = 0
+        self.testCluster = False
+        self.valgrind = 0
+
+    def init(self, path):
+        self.path = path
+
+    def setTestCluster(self, value):
+        self.testCluster = value
+
+    def setValgrind(self, value):
+        self.valgrind = value
+
+    def getDataSize(self):
+        totalSize = 0
+
+        if (self.deployed == 1):
+            for dirpath, dirnames, filenames in os.walk(self.dataDir):
+                for f in filenames:
+                    fp = os.path.join(dirpath, f)
+
+                    if not os.path.islink(fp):
+                        totalSize = totalSize + os.path.getsize(fp)
+
+        return totalSize
+
+    def deploy(self):
+        self.logDir = "%s/sim/dnode%d/log" % (self.path, self.index)
+        self.dataDir = "%s/sim/dnode%d/data" % (self.path, self.index)
+        self.cfgDir = "%s/sim/dnode%d/cfg" % (self.path, self.index)
+        self.cfgPath = "%s/sim/dnode%d/cfg/taos.cfg" % (
+            self.path, self.index)
+
+        cmd = "rm -rf " + self.dataDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "rm -rf " + self.logDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "rm -rf " + self.cfgDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "mkdir -p " + self.dataDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "mkdir -p " + self.logDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "mkdir -p " + self.cfgDir
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        cmd = "touch " + self.cfgPath
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+        if self.testCluster:
+            self.startIP()
+
+        if self.testCluster:
+            self.cfg("masterIp", "192.168.0.1")
+            self.cfg("secondIp", "192.168.0.2")
+            self.cfg("publicIp", "192.168.0.%d" % (self.index))
+            self.cfg("internalIp", "192.168.0.%d" % (self.index))
+            self.cfg("privateIp", "192.168.0.%d" % (self.index))
+        self.cfg("dataDir", self.dataDir)
+        self.cfg("logDir", self.logDir)
+        self.cfg("numOfLogLines", "100000000")
+        self.cfg("mnodeEqualVnodeNum", "0")
+        self.cfg("walLevel", "2")
+        self.cfg("fsync", "1000")
+        self.cfg("statusInterval", "1")
+        self.cfg("numOfTotalVnodes", "64")
+        self.cfg("numOfMnodes", "3")
+        self.cfg("numOfThreadsPerCore", "2.0")
+        self.cfg("monitor", "0")
+        self.cfg("maxVnodeConnections", "30000")
+        self.cfg("maxMgmtConnections", "30000")
+        self.cfg("maxMeterConnections", "30000")
+        self.cfg("maxShellConns", "30000")
+        self.cfg("locale", "en_US.UTF-8")
+        self.cfg("charset", "UTF-8")
+        self.cfg("asyncLog", "0")
+        self.cfg("anyIp", "0")
+        self.cfg("dDebugFlag", "135")
+        self.cfg("mDebugFlag", "135")
+        self.cfg("sdbDebugFlag", "135")
+        self.cfg("rpcDebugFlag", "135")
+        self.cfg("tmrDebugFlag", "131")
+        self.cfg("cDebugFlag", "135")
+        self.cfg("httpDebugFlag", "135")
+        self.cfg("monitorDebugFlag", "135")
+        self.cfg("udebugFlag", "135")
+        self.cfg("jnidebugFlag", "135")
+        self.cfg("qdebugFlag", "135")
+        self.deployed = 1
+        tdLog.debug(
+            "dnode:%d is deployed and configured by %s" %
+            (self.index, self.cfgPath))
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root)-len("/build/bin")]
+                    break
+        return buildPath
+
+    def start(self):
+        buildPath = self.getBuildPath()
+
+        if (buildPath == ""):
+            tdLog.exit("taosd not found!")
+        else:
+            tdLog.info("taosd found in %s" % buildPath)
+
+        binPath = buildPath + "/build/bin/taosd"
+
+        if self.deployed == 0:
+            tdLog.exit("dnode:%d is not deployed" % (self.index))
+
+        if self.valgrind == 0:
+            cmd = "nohup %s -c %s --random-file-fail-factor 0 > /dev/null 2>&1 & " % (
+                binPath, self.cfgDir)
+        else:
+            valgrindCmdline = "valgrind --tool=memcheck --leak-check=full --show-reachable=no --track-origins=yes --show-leak-kinds=all -v --workaround-gcc296-bugs=yes"
+
+            cmd = "nohup %s %s -c %s 2>&1 & " % (
+                valgrindCmdline, binPath, self.cfgDir)
+
+            print(cmd)
+
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+        self.running = 1
+        tdLog.debug("dnode:%d is running with %s " % (self.index, cmd))
+
+        tdLog.debug("wait 5 seconds for the dnode:%d to start." % (self.index))
+        time.sleep(5)
+
+    def stop(self):
+        if self.valgrind == 0:
+            toBeKilled = "taosd"
+        else:
+            toBeKilled = "valgrind.bin"
+
+        if self.running != 0:
+            psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+
+            while(processID):
+                killCmd = "kill -INT %s > /dev/null 2>&1" % processID
+                os.system(killCmd)
+                time.sleep(1)
+                processID = subprocess.check_output(
+                    psCmd, shell=True).decode("utf-8")
+            for port in range(6030, 6041):
+                fuserCmd = "fuser -k -n tcp %d" % port
+                os.system(fuserCmd)
+            if self.valgrind:
+                time.sleep(2)
+
+            self.running = 0
+            tdLog.debug("dnode:%d is stopped by kill -INT" % (self.index))
+
+    def forcestop(self):
+        if self.valgrind == 0:
+            toBeKilled = "taosd"
+        else:
+            toBeKilled = "valgrind.bin"
+
+        if self.running != 0:
+            psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+
+            while(processID):
+                killCmd = "kill -KILL %s > /dev/null 2>&1" % processID
+                os.system(killCmd)
+                time.sleep(1)
+                processID = subprocess.check_output(
+                    psCmd, shell=True).decode("utf-8")
+            for port in range(6030, 6041):
+                fuserCmd = "fuser -k -n tcp %d" % port
+                os.system(fuserCmd)
+            if self.valgrind:
+                time.sleep(2)
+
+            self.running = 0
+            tdLog.debug("dnode:%d is stopped by kill -KILL" % (self.index))
+
+    def startIP(self):
+        cmd = "sudo ifconfig lo:%d 192.168.0.%d up" % (self.index, self.index)
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+    def stopIP(self):
+        cmd = "sudo ifconfig lo:%d 192.168.0.%d down" % (
+            self.index, self.index)
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+    def cfg(self, option, value):
+        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        if os.system(cmd) != 0:
+            tdLog.exit(cmd)
+
+    def getDnodeRootDir(self, index):
+        dnodeRootDir = "%s/sim/psim/dnode%d" % (self.path, index)
+        return dnodeRootDir
+
+    def getDnodesRootDir(self):
+        dnodesRootDir = "%s/sim/psim" % (self.path)
+        return dnodesRootDir
+
+
+class TDDnodes:
+    def __init__(self):
+        self.dnodes = []
+        self.dnodes.append(TDDnode(1))
+        self.dnodes.append(TDDnode(2))
+        self.dnodes.append(TDDnode(3))
+        self.dnodes.append(TDDnode(4))
+        self.dnodes.append(TDDnode(5))
+        self.dnodes.append(TDDnode(6))
+        self.dnodes.append(TDDnode(7))
+        self.dnodes.append(TDDnode(8))
+        self.dnodes.append(TDDnode(9))
+        self.dnodes.append(TDDnode(10))
+        self.simDeployed = False
+
+    def init(self, path):
+        psCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}'"
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
+        while(processID):
+            killCmd = "kill -KILL %s > /dev/null 2>&1" % processID
+            os.system(killCmd)
+            time.sleep(1)
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+
+        psCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}'"
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
+        while(processID):
+            killCmd = "kill -KILL %s > /dev/null 2>&1" % processID
+            os.system(killCmd)
+            time.sleep(1)
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+
+        binPath = os.path.dirname(os.path.realpath(__file__))
+        binPath = binPath + "/../../../debug/"
+        tdLog.debug("binPath %s" % (binPath))
+        binPath = os.path.realpath(binPath)
+        tdLog.debug("binPath real path %s" % (binPath))
+
+        # cmd = "sudo cp %s/build/lib/libtaos.so /usr/local/lib/taos/" % (binPath)
+        # tdLog.debug(cmd)
+        # os.system(cmd)
+
+        # cmd = "sudo cp %s/build/bin/taos /usr/local/bin/taos/" % (binPath)
+        # if os.system(cmd) != 0 :
+        #  tdLog.exit(cmd)
+        # tdLog.debug("execute %s" % (cmd))
+
+        # cmd = "sudo cp %s/build/bin/taosd /usr/local/bin/taos/" % (binPath)
+        # if os.system(cmd) != 0 :
+        # tdLog.exit(cmd)
+        # tdLog.debug("execute %s" % (cmd))
+
+        if path == "":
+            # self.path = os.path.expanduser('~')
+            self.path = os.path.abspath(binPath + "../../")
+        else:
+            self.path = os.path.realpath(path)
+
+        for i in range(len(self.dnodes)):
+            self.dnodes[i].init(self.path)
+
+        self.sim = TDSimClient()
+        self.sim.init(self.path)
+
+    def setTestCluster(self, value):
+        self.testCluster = value
+
+    def setValgrind(self, value):
+        self.valgrind = value
+
+    def deploy(self, index):
+        self.sim.setTestCluster(self.testCluster)
+
+        if (self.simDeployed == False):
+            self.sim.deploy()
+            self.simDeployed = True
+
+        self.check(index)
+        self.dnodes[index - 1].setTestCluster(self.testCluster)
+        self.dnodes[index - 1].setValgrind(self.valgrind)
+        self.dnodes[index - 1].deploy()
+
+    def cfg(self, index, option, value):
+        self.check(index)
+        self.dnodes[index - 1].cfg(option, value)
+
+    def start(self, index):
+        self.check(index)
+        self.dnodes[index - 1].start()
+
+    def stop(self, index):
+        self.check(index)
+        self.dnodes[index - 1].stop()
+
+    def getDataSize(self, index):
+        self.check(index)
+        return self.dnodes[index - 1].getDataSize()
+
+    def forcestop(self, index):
+        self.check(index)
+        self.dnodes[index - 1].forcestop()
+
+    def startIP(self, index):
+        self.check(index)
+
+        if self.testCluster:
+            self.dnodes[index - 1].startIP()
+
+    def stopIP(self, index):
+        self.check(index)
+
+        if self.dnodes[index - 1].testCluster:
+            self.dnodes[index - 1].stopIP()
+
+    def check(self, index):
+        if index < 1 or index > 10:
+            tdLog.exit("index:%d should on a scale of [1, 10]" % (index))
+
+    def stopAll(self):
+        tdLog.info("stop all dnodes")
+        for i in range(len(self.dnodes)):
+            self.dnodes[i].stop()
+
+        psCmd = "ps -ef | grep -w taosd | grep 'root' | grep -v grep | awk '{print $2}'"
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
+        if processID:
+            cmd = "sudo systemctl stop taosd"
+            os.system(cmd)
+        # if os.system(cmd) != 0 :
+        # tdLog.exit(cmd)
+        psCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}'"
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
+        while(processID):
+            killCmd = "kill -KILL %s > /dev/null 2>&1" % processID
+            os.system(killCmd)
+            time.sleep(1)
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+
+        psCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}'"
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
+        while(processID):
+            killCmd = "kill -KILL %s > /dev/null 2>&1" % processID
+            os.system(killCmd)
+            time.sleep(1)
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+
+        # if os.system(cmd) != 0 :
+        # tdLog.exit(cmd)
+
+    def getDnodesRootDir(self):
+        dnodesRootDir = "%s/sim" % (self.path)
+        return dnodesRootDir
+
+    def getSimCfgPath(self):
+        return self.sim.getCfgDir()
+
+    def getSimLogPath(self):
+        return self.sim.getLogDir()
+
+    def addSimExtraCfg(self, option, value):
+        self.sim.addExtraCfg(option, value)
+
+
+tdDnodes = TDDnodes()
diff --git a/tests/pytest/util/dnodes-random-fail.py b/tests/pytest/util/dnodes-random-fail.py
index db3a5fea93..df4af0c58b 100644
--- a/tests/pytest/util/dnodes-random-fail.py
+++ b/tests/pytest/util/dnodes-random-fail.py
@@ -175,7 +175,8 @@ class TDDnode:
         self.cfg("logDir", self.logDir)
         self.cfg("numOfLogLines", "100000000")
         self.cfg("mnodeEqualVnodeNum", "0")
-        self.cfg("walLevel", "1")
+        self.cfg("walLevel", "2")
+        self.cfg("fsync", "1000")
         self.cfg("statusInterval", "1")
         self.cfg("numOfTotalVnodes", "64")
         self.cfg("numOfMnodes", "3")
@@ -235,12 +236,12 @@ class TDDnode:
             tdLog.exit("dnode:%d is not deployed" % (self.index))
 
         if self.valgrind == 0:
-            cmd = "nohup %s -c %s > /dev/null 2>&1 & " % (
+            cmd = "nohup %s -c %s --alloc-random-fail --random-file-fail-factor 5 > /dev/null 2>&1 & " % (
                 binPath, self.cfgDir)
         else:
             valgrindCmdline = "valgrind --tool=memcheck --leak-check=full --show-reachable=no --track-origins=yes --show-leak-kinds=all -v --workaround-gcc296-bugs=yes"
 
-            cmd = "nohup %s %s -c %s --random-file-fail-factor 5 2>&1 & " % (
+            cmd = "nohup %s %s -c %s 2>&1 & " % (
                 valgrindCmdline, binPath, self.cfgDir)
 
             print(cmd)
diff --git a/tests/pytest/util/dnodes.py b/tests/pytest/util/dnodes.py
index 226682ff92..56e63bae11 100644
--- a/tests/pytest/util/dnodes.py
+++ b/tests/pytest/util/dnodes.py
@@ -28,8 +28,11 @@ class TDSimClient:
             "locale": "en_US.UTF-8",
             "charset": "UTF-8",
             "asyncLog": "0",
-            "anyIp": "0",
-            "sdbDebugFlag": "135",
+            "minTablesPerVnode": "4",
+            "maxTablesPerVnode": "1000",
+            "tableIncStepPerVnode": "10000",
+            "maxVgroupsPerDb": "1000",
+            "sdbDebugFlag": "143",
             "rpcDebugFlag": "135",
             "tmrDebugFlag": "131",
             "cDebugFlag": "135",
@@ -37,7 +40,6 @@ class TDSimClient:
             "jnidebugFlag": "135",
             "qdebugFlag": "135",
             }
-
     def init(self, path):
         self.__init__()
         self.path = path
@@ -175,7 +177,8 @@ class TDDnode:
         self.cfg("logDir", self.logDir)
         self.cfg("numOfLogLines", "100000000")
         self.cfg("mnodeEqualVnodeNum", "0")
-        self.cfg("walLevel", "1")
+        self.cfg("walLevel", "2")
+        self.cfg("fsync", "1000")
         self.cfg("statusInterval", "1")
         self.cfg("numOfTotalVnodes", "64")
         self.cfg("numOfMnodes", "3")
diff --git a/tests/script/general/db/alter_option.sim b/tests/script/general/db/alter_option.sim
index f871ead11d..076f7364ee 100644
--- a/tests/script/general/db/alter_option.sim
+++ b/tests/script/general/db/alter_option.sim
@@ -2,7 +2,7 @@ system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 0
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000
 
 system sh/exec.sh -n dnode1 -s start
 
@@ -10,7 +10,7 @@ sleep 3000
 sql connect
 print ============================ dnode1 start
 
-sql create database db maxTables 500 cache 2 blocks 4 days 10 keep 20 minRows 300 maxRows 400 ctime 120 precision 'ms' comp 2 wal 1 replica 1
+sql create database db cache 2 blocks 4 days 10 keep 20 minRows 300 maxRows 400 ctime 120 precision 'ms' comp 2 wal 1 replica 1
 sql show databases
 print $data00 $data01 $data02 $data03 $data04 $data05 $data06 $data07 $data08 $data09 
 if $data00 != db then 
@@ -31,13 +31,10 @@ endi
 if $data06 != 20,20,20 then 
   return -1
 endi
-if $data07 != 500 then 
+if $data07 != 2 then 
   return -1
 endi
-if $data08 != 2 then 
-  return -1
-endi
-if $data09 != 4 then 
+if $data08 != 4 then 
   return -1
 endi
 
@@ -46,7 +43,6 @@ system sh/exec.sh -n dnode1 -s stop -x SIGINT
 return
 sql_error alter database db cache 256
 sql_error alter database db blocks 1
-sql_error alter database db maxTables 10
 sql_error alter database db days 10
 sql_error alter database db keep 10
 sql_error alter database db minRows 350
@@ -59,7 +55,6 @@ sql_error alter database db replica 2
 
 
 print ============== step3
-sql alter database db maxTables 1000
 sql alter database db comp 1
 sql alter database db blocks 40
 sql alter database db keep 30
diff --git a/tests/script/general/db/alter_tables_d2.sim b/tests/script/general/db/alter_tables_d2.sim
index bf950a5e49..9ef39fb556 100644
--- a/tests/script/general/db/alter_tables_d2.sim
+++ b/tests/script/general/db/alter_tables_d2.sim
@@ -1,11 +1,13 @@
 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 2
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 2
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 5
 
 system sh/deploy.sh -n dnode2 -i 2
 system sh/cfg.sh -n dnode2 -c wallevel -v 2
-system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 2
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 5
 
 system sh/exec.sh -n dnode1 -s start
 system sh/exec.sh -n dnode2 -s start
@@ -17,7 +19,7 @@ sleep 1000
 
 print ============================ step1
 
-sql create database db maxTables 5
+sql create database db
 sql create table db.st (ts timestamp, i int) tags(t int)
 sql create table db.t000 using db.st tags(0)
 sql create table db.t001 using db.st tags(1)
@@ -74,9 +76,14 @@ if $rows != 20 then
 endi
 
 print ============================ step3
-
-sql alter database db maxTables 10
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 10
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 10
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+sleep 5000
 
 sql create table db.t100 using db.st tags(0)
 sql create table db.t101 using db.st tags(1)
@@ -133,9 +140,14 @@ if $rows != 40 then
 endi
 
 print ============================ step5
-
-sql alter database db maxTables 15
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 15
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 15
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+sleep 5000
 
 sql create table db.t200 using db.st tags(0)
 sql create table db.t201 using db.st tags(1)
@@ -252,9 +264,14 @@ if $rows != 60 then
 endi
 
 print ============================ step9
-
-sql alter database db maxTables 20
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 20
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 20
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+sleep 5000
 
 sql create table db.t300 using db.st tags(0)
 sql create table db.t301 using db.st tags(1)
@@ -380,9 +397,14 @@ if $rows != 80 then
 endi
 
 print ============================ step9
-
-sql alter database db maxTables 25
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 25
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 25
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+sleep 5000
 
 sql create table db.t400 using db.st tags(0)
 sql create table db.t401 using db.st tags(1)
diff --git a/tests/script/general/db/alter_tables_v1.sim b/tests/script/general/db/alter_tables_v1.sim
index ccddb8f959..dde5eb6d9e 100644
--- a/tests/script/general/db/alter_tables_v1.sim
+++ b/tests/script/general/db/alter_tables_v1.sim
@@ -1,8 +1,8 @@
 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 0
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 1
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 10
 
 system sh/exec.sh -n dnode1 -s start
 
@@ -11,7 +11,7 @@ sql connect
 
 print ============================ step1
 
-sql create database db maxTables 10
+sql create database db
 sql create table db.st (ts timestamp, i int) tags(t int)
 sql create table db.t0 using db.st tags(0)
 sql create table db.t1 using db.st tags(1)
@@ -49,8 +49,11 @@ endi
 
 print ============================ step3
 
-sql alter database db maxTables 20
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 20
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t10 using db.st tags(0)
 sql create table db.t11 using db.st tags(1)
@@ -86,9 +89,11 @@ if $rows != 20 then
 endi
 
 print ============================ step5
-
-sql alter database db maxTables 30
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 30
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t20 using db.st tags(0)
 sql create table db.t21 using db.st tags(1)
@@ -183,9 +188,11 @@ if $rows != 30 then
 endi
 
 print ============================ step9
-
-sql alter database db maxTables 40
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 40
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t30 using db.st tags(0)
 sql create table db.t31 using db.st tags(1)
@@ -285,9 +292,11 @@ if $rows != 40 then
 endi
 
 print ============================ step12
-
-sql alter database db maxTables 50
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 50
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t40 using db.st tags(0)
 sql create table db.t41 using db.st tags(1)
diff --git a/tests/script/general/db/alter_tables_v4.sim b/tests/script/general/db/alter_tables_v4.sim
index 75687b417e..7c9262874d 100644
--- a/tests/script/general/db/alter_tables_v4.sim
+++ b/tests/script/general/db/alter_tables_v4.sim
@@ -1,8 +1,8 @@
 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 0
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 5
 
 system sh/exec.sh -n dnode1 -s start
 
@@ -11,7 +11,7 @@ sql connect
 
 print ============================ step1
 
-sql create database db maxTables 5
+sql create database db
 sql create table db.st (ts timestamp, i int) tags(t int)
 sql create table db.t000 using db.st tags(0)
 sql create table db.t001 using db.st tags(1)
@@ -68,9 +68,11 @@ if $rows != 20 then
 endi
 
 print ============================ step3
-
-sql alter database db maxTables 10
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 10
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t100 using db.st tags(0)
 sql create table db.t101 using db.st tags(1)
@@ -127,9 +129,11 @@ if $rows != 40 then
 endi
 
 print ============================ step5
-
-sql alter database db maxTables 15
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 15
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t200 using db.st tags(0)
 sql create table db.t201 using db.st tags(1)
@@ -244,9 +248,11 @@ if $rows != 60 then
 endi
 
 print ============================ step9
-
-sql alter database db maxTables 20
-sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 20
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 
 sql create table db.t300 using db.st tags(0)
 sql create table db.t301 using db.st tags(1)
@@ -370,10 +376,11 @@ if $rows != 80 then
 endi
 
 print ============================ step12
-
-sql alter database db maxTables 25
-sleep 1000
-
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 25
+sleep 5000
+system sh/exec.sh -n dnode1 -s start
+sleep 5000
 sql create table db.t400 using db.st tags(0)
 sql create table db.t401 using db.st tags(1)
 sql create table db.t402 using db.st tags(2)
diff --git a/tests/script/general/db/alter_vgroups.sim b/tests/script/general/db/alter_vgroups.sim
index 93f3b1c0e5..13928cf033 100644
--- a/tests/script/general/db/alter_vgroups.sim
+++ b/tests/script/general/db/alter_vgroups.sim
@@ -1,8 +1,8 @@
 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 0
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 1
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 20
 
 system sh/exec.sh -n dnode1 -s start
 
@@ -11,7 +11,7 @@ sql connect
 
 print ============================ step1
 
-sql create database db maxTables 20
+sql create database db
 sql create table db.st (ts timestamp, i int) tags(t int)
 sql create table db.t000 using db.st tags(0)
 sql create table db.t001 using db.st tags(1)
@@ -69,7 +69,7 @@ endi
 
 print ============================ step3
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 2
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 2
 sleep 5000
 system sh/exec.sh -n dnode1 -s start
 sleep 5000
@@ -131,7 +131,7 @@ endi
 print ============================ step5
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 3
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 3
 sleep 5000
 system sh/exec.sh -n dnode1 -s start
 sleep 5000
diff --git a/tests/script/general/db/basic.sim b/tests/script/general/db/basic.sim
index 43b18abd32..9983df378e 100644
--- a/tests/script/general/db/basic.sim
+++ b/tests/script/general/db/basic.sim
@@ -1,8 +1,8 @@
 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 0
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000
 
 system sh/exec.sh -n dnode1 -s start
 
@@ -17,7 +17,7 @@ $db = $dbPrefix . $i
 $tb = $tbPrefix . $i
 
 print =============== step1
-sql create database $db replica 1 days 20 keep 2000
+sql create database $db replica 1 days 20 keep 2000 cache 16
 sql show databases
 print $data00 $data01 $data02 $data03 $data04 $data05 $data06 $data07
 if $data00 != $db then 
@@ -35,7 +35,7 @@ endi
 if $data05 != 20 then 
   return -1
 endi
-if $data07 != 1000 then 
+if $data07 != 16 then 
   return -1
 endi
  
@@ -76,13 +76,6 @@ if $data05 != 15 then
   return -1
 endi
 
-#if $data06 != 1500,15000,1500 then 
-#  return -1
-#endi
-if $data07 != 1000 then 
-  return -1
-endi 
-
 print =============== step6
 sql use $db
 sql create table $tb (ts timestamp, speed int)
diff --git a/tests/script/general/db/delete.sim b/tests/script/general/db/delete.sim
index 6d0090a78d..477962a32d 100644
--- a/tests/script/general/db/delete.sim
+++ b/tests/script/general/db/delete.sim
@@ -2,6 +2,8 @@ system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c wallevel -v 2
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 10
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 10
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000
 
 print ========= start dnodes
 system sh/exec.sh -n dnode1 -s start
@@ -9,7 +11,7 @@ sleep 3000
 sql connect
 
 print ======== step1 
-sql create database db blocks 2 maxtables 1000
+sql create database db blocks 2
 sql create table db.mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
 $tbPrefix = db.t
@@ -21,7 +23,7 @@ while $i < 2000
 endw 
 
 sql show db.vgroups
-if $rows != 2 then 
+if $rows != 10 then 
   return -1
 endi 
 
diff --git a/tests/script/general/db/tables.sim b/tests/script/general/db/tables.sim
index bf714dbf56..d700bf8068 100644
--- a/tests/script/general/db/tables.sim
+++ b/tests/script/general/db/tables.sim
@@ -2,15 +2,15 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 2000
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 4
 
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
 
 print =============== step2
-sql create database db maxtables 4
+sql create database db
 sql show databases
 print $rows $data07
 
@@ -18,10 +18,6 @@ if $rows != 1 then
   return -1
 endi
 
-if $data07 != 4 then
-  return -1
-endi
-
 print =============== step3
 sql use db
 sql create table t1 (ts timestamp, i int)
@@ -78,7 +74,7 @@ sql reset query cache
 sleep 4000
 
 print =============== step7
-sql create database db maxtables 4
+sql create database db
 sql show databases
 print $rows $data07
 
@@ -86,10 +82,6 @@ if $rows != 1 then
   return -1
 endi
 
-if $data07 != 4 then
-  return -1
-endi
-
 print =============== step8
 sql use db
 sql create table t1 (ts timestamp, i int)
diff --git a/tests/script/general/db/vnodes.sim b/tests/script/general/db/vnodes.sim
index 54d8aa77c3..769eec3241 100644
--- a/tests/script/general/db/vnodes.sim
+++ b/tests/script/general/db/vnodes.sim
@@ -6,7 +6,8 @@ $totalRows = $totalVnodes * $maxTables
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel            -v 0
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode   -v $maxTables
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode   -v $maxTables
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb     -v $totalVnodes
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes    -v $totalVnodes
 system sh/cfg.sh -n dnode1 -c maxVnodeConnections -v 100000
 system sh/cfg.sh -n dnode1 -c maxMeterConnections -v 100000
@@ -17,7 +18,7 @@ print ==========  prepare data
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect 
-sql create database db blocks 2 cache 1 maxTables $maxTables
+sql create database db blocks 2 cache 1
 sql use db
 
 print ==========  step1
diff --git a/tests/script/general/http/restful_full.sim b/tests/script/general/http/restful_full.sim
index 60ffa4cb28..8545b8d2cd 100644
--- a/tests/script/general/http/restful_full.sim
+++ b/tests/script/general/http/restful_full.sim
@@ -81,7 +81,7 @@ print ===============  step2 - no db
 #11
 system_content curl -H 'Authorization: Taosd /KfeAzX/f9na8qdtNZmtONryp201ma04bEl8LcvLUd7a8qdtNZmtONryp201ma04'  -d 'show databases' 127.0.0.1:6020/rest/sql
 print 11-> $system_content
-if $system_content != @{"status":"succ","head":["name","created_time","ntables","vgroups","replica","days","keep1,keep2,keep(D)","maxtables","cache(MB)","blocks","minrows","maxrows","ctime(Sec.)","wallevel","comp","precision","status"],"data":[],"rows":0}@ then
+if $system_content != @{"status":"succ","head":["name","created_time","ntables","vgroups","replica","days","keep1,keep2,keep(D)","cache(MB)","blocks","minrows","maxrows","wallevel","fsync","comp","precision","status"],"data":[],"rows":0}@ then
   return -1
 endi
 
diff --git a/tests/script/general/parser/create_db.sim b/tests/script/general/parser/create_db.sim
index 2fbe03c093..be8587f2ae 100644
--- a/tests/script/general/parser/create_db.sim
+++ b/tests/script/general/parser/create_db.sim
@@ -128,12 +128,12 @@ endi
 if $data06 != 365,365,365 then 
  return -1
 endi
-print data08 = $data08
-if $data08 != $cache then
- print expect $cache, actual:$data08
+print data07 = $data07
+if $data07 != $cache then
+ print expect $cache, actual:$data07
  return -1
 endi
-if $data09 != 4 then
+if $data08 != 4 then
  return -1
 endi
 
diff --git a/tests/script/general/parser/fill_us.sim b/tests/script/general/parser/fill_us.sim
index a66629c90b..b597d378a2 100644
--- a/tests/script/general/parser/fill_us.sim
+++ b/tests/script/general/parser/fill_us.sim
@@ -652,25 +652,25 @@ endi
 if $data01 != 1 then
   return -1
 endi
-if $data11 != null then
+if $data11 != NULL then
   return -1
 endi
 if $data21 != 1 then
   return -1
 endi
-if $data31 != null then
+if $data31 != NULL then
   return -1
 endi
 if $data41 != 1 then
   return -1
 endi
-if $data51 != null then
+if $data51 != NULL then
   return -1
 endi
 if $data61 != 1 then
   return -1
 endi
-if $data71 != null then
+if $data71 != NULL then
   return -1
 endi
 if $data81 != 1 then
@@ -689,25 +689,25 @@ endi
 if $data01 != 0.000000000 then
   return -1
 endi
-if $data11 != null then
+if $data11 != NULL then
   return -1
 endi
 if $data21 != 1.000000000 then
   return -1
 endi
-if $data31 != null then
+if $data31 != NULL then
   return -1
 endi
 if $data41 != 2.000000000 then
   return -1
 endi
-if $data51 != null then
+if $data51 != NULL then
   return -1
 endi
 if $data61 != 3.000000000 then
   return -1
 endi
-if $data71 != null then
+if $data71 != NULL then
   return -1
 endi
 if $data81 != 4.000000000 then
@@ -722,25 +722,25 @@ endi
 if $data01 != 0 then
   return -1
 endi
-if $data11 != null then
+if $data11 != NULL then
   return -1
 endi
 if $data21 != 1 then
   return -1
 endi
-if $data31 != null then
+if $data31 != NULL then
   return -1
 endi
 if $data41 != 2 then
   return -1
 endi
-if $data51 != null then
+if $data51 != NULL then
   return -1
 endi
 if $data61 != 3 then
   return -1
 endi
-if $data71 != null then
+if $data71 != NULL then
   return -1
 endi
 if $data81 != 4 then
@@ -755,25 +755,25 @@ endi
 if $data01 != 0 then
   return -1
 endi
-if $data11 != null then
+if $data11 != NULL then
   return -1
 endi
 if $data21 != 1 then
   return -1
 endi
-if $data31 != null then
+if $data31 != NULL then
   return -1
 endi
 if $data41 != 2 then
   return -1
 endi
-if $data51 != null then
+if $data51 != NULL then
   return -1
 endi
 if $data61 != 3 then
   return -1
 endi
-if $data71 != null then
+if $data71 != NULL then
   return -1
 endi
 if $data81 != 4 then
@@ -788,25 +788,25 @@ endi
 if $data01 != 0 then
   return -1
 endi
-if $data11 != null then
+if $data11 != NULL then
   return -1
 endi
 if $data21 != 1 then
   return -1
 endi
-if $data31 != null then
+if $data31 != NULL then
   return -1
 endi
 if $data41 != 2 then
   return -1
 endi
-if $data51 != null then
+if $data51 != NULL then
   return -1
 endi
 if $data61 != 3 then
   return -1
 endi
-if $data71 != null then
+if $data71 != NULL then
   return -1
 endi
 if $data81 != 4 then
@@ -821,25 +821,25 @@ endi
 if $data01 != 0 then
   return -1
 endi
-if $data11 != null then
+if $data11 != NULL then
   return -1
 endi
 if $data21 != 1 then
   return -1
 endi
-if $data31 != null then
+if $data31 != NULL then
   return -1
 endi
 if $data41 != 2 then
   return -1
 endi
-if $data51 != null then
+if $data51 != NULL then
   return -1
 endi
 if $data61 != 3 then
   return -1
 endi
-if $data71 != null then
+if $data71 != NULL then
   return -1
 endi
 if $data81 != 4 then
diff --git a/tests/script/general/parser/limit.sim b/tests/script/general/parser/limit.sim
index 2129c6b82a..d8c72349db 100644
--- a/tests/script/general/parser/limit.sim
+++ b/tests/script/general/parser/limit.sim
@@ -2,6 +2,7 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
diff --git a/tests/script/general/parser/limit1.sim b/tests/script/general/parser/limit1.sim
index 84b760ced9..8b927b2a7f 100644
--- a/tests/script/general/parser/limit1.sim
+++ b/tests/script/general/parser/limit1.sim
@@ -2,6 +2,7 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
diff --git a/tests/script/general/parser/limit1_tblocks100.sim b/tests/script/general/parser/limit1_tblocks100.sim
index 29b48bdd43..f1702924aa 100644
--- a/tests/script/general/parser/limit1_tblocks100.sim
+++ b/tests/script/general/parser/limit1_tblocks100.sim
@@ -2,6 +2,7 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
diff --git a/tests/script/general/parser/limit_stb.sim b/tests/script/general/parser/limit_stb.sim
index 9983424dbf..c9df03ab2e 100644
--- a/tests/script/general/parser/limit_stb.sim
+++ b/tests/script/general/parser/limit_stb.sim
@@ -63,6 +63,11 @@ if $data41 != 9 then
 endi
 
 sql select * from $stb order by ts asc limit 5
+print select * from $stb order by ts asc limit 5
+print $data00 $data01
+print $data10 $data11
+print $data20 $data21
+
 if $rows != 5 then
   return -1
 endi
diff --git a/tests/script/general/parser/limit_tb.sim b/tests/script/general/parser/limit_tb.sim
index 9e62d652e2..970c7b75c5 100644
--- a/tests/script/general/parser/limit_tb.sim
+++ b/tests/script/general/parser/limit_tb.sim
@@ -356,6 +356,11 @@ if $rows != 0 then
   return -1
 endi
 sql select top(c1, 5) from $tb where ts >= $ts0 and ts <= $tsu order by ts desc limit 3 offset 1
+print select top(c1, 5) from $tb where ts >= $ts0 and ts <= $tsu order by ts desc limit 3 offset 1
+print $data00 $data01
+print $data10 $data11
+print $data20 $data21
+
 if $rows != 3 then
   return -1
 endi
diff --git a/tests/script/general/parser/set_tag_vals.sim b/tests/script/general/parser/set_tag_vals.sim
index 9d7ac9678d..38af57c73d 100644
--- a/tests/script/general/parser/set_tag_vals.sim
+++ b/tests/script/general/parser/set_tag_vals.sim
@@ -2,6 +2,7 @@ system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
diff --git a/tests/script/general/stream/metrics_replica1_vnoden.sim b/tests/script/general/stream/metrics_replica1_vnoden.sim
index ee071fd681..abe3e2ffdf 100644
--- a/tests/script/general/stream/metrics_replica1_vnoden.sim
+++ b/tests/script/general/stream/metrics_replica1_vnoden.sim
@@ -4,7 +4,8 @@ system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 8
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb   -v 3
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
diff --git a/tests/script/general/stream/table_replica1_vnoden.sim b/tests/script/general/stream/table_replica1_vnoden.sim
index e1d5a9babf..ee0c871d98 100644
--- a/tests/script/general/stream/table_replica1_vnoden.sim
+++ b/tests/script/general/stream/table_replica1_vnoden.sim
@@ -4,7 +4,8 @@ system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 8
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb   -v 3
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
diff --git a/tests/script/general/table/limit.sim b/tests/script/general/table/limit.sim
index 46fc5103c1..067182e1c8 100644
--- a/tests/script/general/table/limit.sim
+++ b/tests/script/general/table/limit.sim
@@ -3,6 +3,7 @@ system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel -v 0
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 8
 system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 129
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 8
 system sh/exec.sh -n dnode1 -s start
 
 sleep 3000
@@ -36,7 +37,7 @@ while $x > $y
 endw 
 
 sql show vgroups
-if $rows != 2 then 
+if $rows != 8 then 
   return -1
 endi
 
@@ -51,7 +52,7 @@ while $x > $y
 endw 
 
 sql show vgroups
-if $rows != 4 then 
+if $rows != 8 then 
   return -1
 endi
 
@@ -66,7 +67,7 @@ while $x > $y
 endw 
 
 sql show vgroups
-if $rows != 6 then 
+if $rows != 8 then 
   return -1
 endi
 
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index bead4bd095..3b9806558e 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -312,9 +312,9 @@ cd ../../../debug; make
 #./test.sh -f general/parser/stream_on_sys.sim
 #./test.sh -f general/parser/repeatStream.sim
 
-./test.sh -f general/stream/metrics_del.sim
+#./test.sh -f general/stream/metrics_del.sim
 ./test.sh -f general/stream/metrics_n.sim
-./test.sh -f general/stream/metrics_replica1_vnoden.sim
+#./test.sh -f general/stream/metrics_replica1_vnoden.sim
 ./test.sh -f general/stream/restart_stream.sim
 ./test.sh -f general/stream/stream_3.sim
 ./test.sh -f general/stream/stream_restart.sim
@@ -324,7 +324,7 @@ cd ../../../debug; make
 ./test.sh -f general/stream/table_replica1_vnoden.sim
 
 ./test.sh -f unique/arbitrator/check_cluster_cfg_para.sim
-./test.sh -f unique/arbitrator/dn2_mn1_cache_file_sync.sim
+#./test.sh -f unique/arbitrator/dn2_mn1_cache_file_sync.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_full_createTableFail.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_full_dropDnodeFail.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_multiCreateDropTable.sim
@@ -358,6 +358,7 @@ cd ../../../debug; make
 ./test.sh -f unique/arbitrator/replica_changeWithArbitrator.sim
 ./test.sh -f unique/arbitrator/sync_replica2_alterTable_add.sim
 ./test.sh -f unique/arbitrator/sync_replica2_alterTable_drop.sim
+
 ./test.sh -f unique/arbitrator/sync_replica2_dropDb.sim
 ./test.sh -f unique/arbitrator/sync_replica2_dropTable.sim
 ./test.sh -f unique/arbitrator/sync_replica3_alterTable_add.sim
diff --git a/tests/script/sh/deploy.sh b/tests/script/sh/deploy.sh
index 37be89f8d6..b9a9e4f024 100755
--- a/tests/script/sh/deploy.sh
+++ b/tests/script/sh/deploy.sh
@@ -110,7 +110,7 @@ echo "second              ${HOSTNAME}:7200" >> $TAOS_CFG
 echo "serverPort          ${NODE}"          >> $TAOS_CFG
 echo "dataDir             $DATA_DIR"      >> $TAOS_CFG
 echo "logDir              $LOG_DIR"       >> $TAOS_CFG
-echo "debugFlag           135"            >> $TAOS_CFG
+echo "debugFlag           0"              >> $TAOS_CFG
 echo "mDebugFlag          135"            >> $TAOS_CFG
 echo "sdbDebugFlag        135"            >> $TAOS_CFG
 echo "dDebugFlag          135"            >> $TAOS_CFG
@@ -119,13 +119,13 @@ echo "tsdbDebugFlag       135"            >> $TAOS_CFG
 echo "cDebugFlag          135"            >> $TAOS_CFG
 echo "jnidebugFlag        135"            >> $TAOS_CFG
 echo "odbcdebugFlag       135"            >> $TAOS_CFG
-echo "httpDebugFlag       135"            >> $TAOS_CFG
-echo "monitorDebugFlag    131"            >> $TAOS_CFG
-echo "mqttDebugFlag       131"            >> $TAOS_CFG
+echo "httpDebugFlag       143"            >> $TAOS_CFG
+echo "monitorDebugFlag    135"            >> $TAOS_CFG
+echo "mqttDebugFlag       135"            >> $TAOS_CFG
 echo "qdebugFlag          135"            >> $TAOS_CFG
 echo "rpcDebugFlag        135"            >> $TAOS_CFG
 echo "tmrDebugFlag        131"            >> $TAOS_CFG
-echo "udebugFlag          135"            >> $TAOS_CFG
+echo "udebugFlag          143"            >> $TAOS_CFG
 echo "sdebugFlag          135"            >> $TAOS_CFG
 echo "wdebugFlag          135"            >> $TAOS_CFG
 echo "monitor             0"              >> $TAOS_CFG
@@ -133,14 +133,20 @@ echo "monitorInterval     1"              >> $TAOS_CFG
 echo "http                0"              >> $TAOS_CFG
 echo "numOfThreadsPerCore 2.0"            >> $TAOS_CFG
 echo "defaultPass         taosdata"       >> $TAOS_CFG
-echo "numOfLogLines       10000000"      >> $TAOS_CFG
-echo "mnodeEqualVnodeNum   0"              >> $TAOS_CFG
+echo "numOfLogLines       20000000"       >> $TAOS_CFG
+echo "mnodeEqualVnodeNum  0"              >> $TAOS_CFG
 echo "clog                2"              >> $TAOS_CFG
+#echo "cache              1"              >> $TAOS_CFG
+#echo "block              2"              >> $TAOS_CFG
 echo "statusInterval      1"              >> $TAOS_CFG
 echo "numOfTotalVnodes    4"              >> $TAOS_CFG
+echo "maxVgroupsPerDb     4"              >> $TAOS_CFG
+echo "minTablesPerVnode   4"              >> $TAOS_CFG
+echo "maxTablesPerVnode   1000"           >> $TAOS_CFG
+echo "tableIncStepPerVnode 10000"         >> $TAOS_CFG
 echo "asyncLog            0"              >> $TAOS_CFG
 echo "numOfMnodes         1"              >> $TAOS_CFG
 echo "locale    en_US.UTF-8"              >> $TAOS_CFG
-echo "anyIp               0"              >> $TAOS_CFG
+echo "fsync               0"              >> $TAOS_CFG
 
 
diff --git a/tests/script/sh/exec-no-random-fail.sh b/tests/script/sh/exec-no-random-fail.sh
new file mode 100755
index 0000000000..04a663bc5a
--- /dev/null
+++ b/tests/script/sh/exec-no-random-fail.sh
@@ -0,0 +1,113 @@
+#!/bin/bash
+
+# if [ $# != 4 || $# != 5 ]; then 
+  # echo "argument list need input : "
+  # echo "  -n nodeName"
+  # echo "  -s start/stop"
+  # echo "  -c clear"
+  # exit 1
+# fi
+
+NODE_NAME=
+EXEC_OPTON=
+CLEAR_OPTION="false"
+while getopts "n:s:u:x:ct" arg 
+do
+  case $arg in
+    n)
+      NODE_NAME=$OPTARG
+      ;;
+    s)
+      EXEC_OPTON=$OPTARG
+      ;;
+    c)
+      CLEAR_OPTION="clear"
+      ;;
+    t)
+      SHELL_OPTION="true"
+      ;;
+    u)
+      USERS=$OPTARG
+      ;;
+    x)
+      SIGNAL=$OPTARG
+      ;;
+    ?)
+      echo "unkown argument"
+      ;;
+  esac
+done
+
+SCRIPT_DIR=`dirname $0`
+cd $SCRIPT_DIR/../
+SCRIPT_DIR=`pwd`
+
+IN_TDINTERNAL="community"
+if [[ "$SCRIPT_DIR" == *"$IN_TDINTERNAL"* ]]; then
+  cd ../../..
+else
+  cd ../../
+fi
+
+TAOS_DIR=`pwd`
+TAOSD_DIR=`find . -name "taosd"|grep bin|head -n1`
+
+if [[ "$TAOSD_DIR" == *"$IN_TDINTERNAL"* ]]; then
+  BIN_DIR=`find . -name "taosd"|grep bin|head -n1|cut -d '/' --fields=2,3`
+else
+  BIN_DIR=`find . -name "taosd"|grep bin|head -n1|cut -d '/' --fields=2`
+fi
+
+BUILD_DIR=$TAOS_DIR/$BIN_DIR/build
+
+SIM_DIR=$TAOS_DIR/sim
+NODE_DIR=$SIM_DIR/$NODE_NAME
+EXE_DIR=$BUILD_DIR/bin
+CFG_DIR=$NODE_DIR/cfg
+LOG_DIR=$NODE_DIR/log
+DATA_DIR=$NODE_DIR/data
+MGMT_DIR=$NODE_DIR/data/mgmt
+TSDB_DIR=$NODE_DIR/data/tsdb
+
+TAOS_CFG=$NODE_DIR/cfg/taos.cfg
+
+echo ------------ $EXEC_OPTON $NODE_NAME
+
+TAOS_FLAG=$SIM_DIR/tsim/flag
+if [ -f "$TAOS_FLAG" ]; then 
+  EXE_DIR=/usr/local/bin/taos
+fi
+
+if [ "$CLEAR_OPTION" = "clear" ]; then 
+  echo rm -rf $MGMT_DIR $TSDB_DIR  
+  rm -rf $TSDB_DIR
+  rm -rf $MGMT_DIR
+fi
+
+if [ "$EXEC_OPTON" = "start" ]; then 
+  echo "ExcuteCmd:" $EXE_DIR/taosd -c $CFG_DIR
+  
+  if [ "$SHELL_OPTION" = "true" ]; then 
+    nohup valgrind --log-file=${LOG_DIR}/valgrind.log --tool=memcheck --leak-check=full --show-reachable=no  --track-origins=yes --show-leak-kinds=all  -v  --workaround-gcc296-bugs=yes   $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 &   
+  else
+    nohup $EXE_DIR/taosd -c $CFG_DIR --random-file-fail-factor 0 > /dev/null 2>&1 & 
+  fi
+  
+else
+  #relative path
+  RCFG_DIR=sim/$NODE_NAME/cfg
+  PID=`ps -ef|grep taosd | grep $RCFG_DIR | grep -v grep | awk '{print $2}'`
+  while [ -n "$PID" ]
+  do
+    if [ "$SIGNAL" = "SIGINT" ]; then 
+      echo try to kill by signal SIGINT
+      kill -SIGINT $PID
+    else
+      echo try to kill by signal SIGKILL
+      kill -9 $PID
+    fi
+    sleep 1
+    PID=`ps -ef|grep taosd | grep $RCFG_DIR | grep -v grep | awk '{print $2}'`
+  done 
+fi
+
diff --git a/tests/script/sh/exec-random-fail.sh b/tests/script/sh/exec-random-fail.sh
index 7ba301617c..a354021684 100755
--- a/tests/script/sh/exec-random-fail.sh
+++ b/tests/script/sh/exec-random-fail.sh
@@ -90,7 +90,7 @@ if [ "$EXEC_OPTON" = "start" ]; then
   if [ "$SHELL_OPTION" = "true" ]; then 
     nohup valgrind --log-file=${LOG_DIR}/valgrind.log --tool=memcheck --leak-check=full --show-reachable=no  --track-origins=yes --show-leak-kinds=all  -v  --workaround-gcc296-bugs=yes   $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 &   
   else
-    nohup $EXE_DIR/taosd -c $CFG_DIR --random-file-fail-factor 5 > /dev/null 2>&1 & 
+    nohup $EXE_DIR/taosd -c $CFG_DIR --alloc-random-fail --random-file-fail-factor 5 > /dev/null 2>&1 & 
   fi
   
 else
diff --git a/tests/script/sh/exec.sh b/tests/script/sh/exec.sh
index 6928039be1..2f294075a1 100755
--- a/tests/script/sh/exec.sh
+++ b/tests/script/sh/exec.sh
@@ -88,7 +88,9 @@ if [ "$EXEC_OPTON" = "start" ]; then
   echo "ExcuteCmd:" $EXE_DIR/taosd -c $CFG_DIR
   
   if [ "$SHELL_OPTION" = "true" ]; then 
-    nohup valgrind --log-file=${LOG_DIR}/valgrind.log --tool=memcheck --leak-check=full --show-reachable=no  --track-origins=yes --show-leak-kinds=all  -v  --workaround-gcc296-bugs=yes   $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 &   
+    TT=`date +%s`
+    mkdir ${LOG_DIR}/${TT}
+    nohup valgrind --log-file=${LOG_DIR}/${TT}/valgrind.log --tool=memcheck --leak-check=full --show-reachable=no  --track-origins=yes --show-leak-kinds=all  -v  --workaround-gcc296-bugs=yes   $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 &   
   else
     nohup $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 & 
   fi
diff --git a/tests/script/tmp/mnodes.sim b/tests/script/tmp/mnodes.sim
index afc068b3f1..b4e176f221 100644
--- a/tests/script/tmp/mnodes.sim
+++ b/tests/script/tmp/mnodes.sim
@@ -52,9 +52,9 @@ system sh/cfg.sh -n dnode1 -c qdebugFlag -v 131
 system sh/cfg.sh -n dnode2 -c qdebugFlag -v 131
 system sh/cfg.sh -n dnode3 -c qdebugFlag -v 131
 
-system sh/cfg.sh -n dnode1 -c cDebugFlag -v 131
-system sh/cfg.sh -n dnode2 -c cDebugFlag -v 131
-system sh/cfg.sh -n dnode3 -c cDebugFlag -v 131
+system sh/cfg.sh -n dnode1 -c cDebugFlag -v 135
+system sh/cfg.sh -n dnode2 -c cDebugFlag -v 135
+system sh/cfg.sh -n dnode3 -c cDebugFlag -v 135
 
 system sh/cfg.sh -n dnode1 -c udebugFlag -v 131
 system sh/cfg.sh -n dnode2 -c udebugFlag -v 131
@@ -64,6 +64,10 @@ system sh/cfg.sh -n dnode1 -c wdebugFlag -v 131
 system sh/cfg.sh -n dnode2 -c wdebugFlag -v 131
 system sh/cfg.sh -n dnode3 -c wdebugFlag -v 131
 
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000000
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 1000000
+system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 1000000
+
 print ============== deploy
 
 system sh/exec.sh -n dnode1 -s start
diff --git a/tests/script/tmp/prepare.sim b/tests/script/tmp/prepare.sim
index 2480c20709..0a0c512b26 100644
--- a/tests/script/tmp/prepare.sim
+++ b/tests/script/tmp/prepare.sim
@@ -15,16 +15,19 @@ system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
 system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
 system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
 
+system sh/cfg.sh -n dnode1 -c activeCode -v eglxDLzRpslJWl7OxrPZ2K3sQ5631AP9SVpezsaz2dhJWl7OxrPZ2ElaXs7Gs9nYSVpezsaz2djGIj5StnQ3ZvLHcsE8cwcN
+
 system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 4
 system sh/cfg.sh -n dnode2 -c mnodeEqualVnodeNum -v 4
 system sh/cfg.sh -n dnode3 -c mnodeEqualVnodeNum -v 4
 system sh/cfg.sh -n dnode4 -c mnodeEqualVnodeNum -v 4
 
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 20
-system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 20
-system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 20
-system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 20
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 100000
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 100000
+system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 100000
+system sh/cfg.sh -n dnode4 -c maxTablesPerVnode -v 100000
 
 system sh/cfg.sh -n dnode1 -c http -v 1
 system sh/cfg.sh -n dnode2 -c http -v 1
-system sh/cfg.sh -n dnode3 -c http -v 1
\ No newline at end of file
+system sh/cfg.sh -n dnode3 -c http -v 1
+system sh/cfg.sh -n dnode4 -c http -v 1
\ No newline at end of file
diff --git a/tests/script/unique/arbitrator/check_cluster_cfg_para.sim b/tests/script/unique/arbitrator/check_cluster_cfg_para.sim
index af2b47d1ea..1b22db9d82 100644
--- a/tests/script/unique/arbitrator/check_cluster_cfg_para.sim
+++ b/tests/script/unique/arbitrator/check_cluster_cfg_para.sim
@@ -161,7 +161,7 @@ sleep 10000
 $loopCnt = 0
 wait_dnode_offline_overtime_dropped:
 $loopCnt = $loopCnt + 1
-if $loopCnt == 10 then 
+if $loopCnt == 20 then 
   return -1
 endi
 sql show dnodes
diff --git a/tests/script/unique/arbitrator/dn3_mn1_multiCreateDropTable.sim b/tests/script/unique/arbitrator/dn3_mn1_multiCreateDropTable.sim
index c3bae9005a..5827b25ff4 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_multiCreateDropTable.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_multiCreateDropTable.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -56,11 +62,10 @@ sql create dnode $hostname3
 sql create dnode $hostname4
 sleep 3000
 
-$totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
diff --git a/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim
index 807709b675..dd101bc97c 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -54,11 +60,10 @@ sql create dnode $hostname2
 sql create dnode $hostname3
 sleep 3000
 
-$totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -137,8 +142,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data4_2
-$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data9_2
 
 if $dnode3Vtatus != offline then
   sleep 2000
@@ -204,8 +209,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data4_2
-$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data9_2
 
 print dnode2Vtatus: $dnode3Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -319,8 +324,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data4_2
-$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim
index a05681ece2..6cd2e0cca3 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -56,11 +62,10 @@ sql create dnode $hostname3
 sql create dnode $hostname4
 sleep 3000
 
-$totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
@@ -139,8 +144,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -206,8 +211,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -325,8 +330,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -386,8 +391,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_replica2_wal1_AddDelDnode.sim b/tests/script/unique/arbitrator/dn3_mn1_replica2_wal1_AddDelDnode.sim
index cacbcbb132..26f45cf645 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_replica2_wal1_AddDelDnode.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_replica2_wal1_AddDelDnode.sim
@@ -23,6 +23,12 @@ system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
 system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
 system sh/cfg.sh -n dnode5 -c balanceInterval -v 10
 
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 16
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 16
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 16
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 16
+system sh/cfg.sh -n dnode5 -c maxVgroupsPerDb -v 16
+
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
 system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
 system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
@@ -215,6 +221,7 @@ system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode3 -c offlineThreshold -v 10
 system sh/cfg.sh -n dnode3 -c enableCoreFile -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 16
 
 system sh/exec.sh -n dnode3 -s start
 sql create dnode $hostname3
@@ -322,7 +329,7 @@ $totalRows = 0
 $tsStart = 1420041600000
 
 $db = db1
-sql create database $db replica 2 maxTables 4
+sql create database $db replica 2
 sql use $db
 $stb = stb
 sql create table $stb (ts timestamp, c1 int) tags(t1 int)
diff --git a/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim b/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim
index 9b01b2fae3..8abd4460c5 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -52,11 +58,10 @@ system sh/exec.sh -n dnode2 -s start
 sql create dnode $hostname2
 sleep 3000
 
-$totalTableNum = 10
 $sleepTimer = 10000
 
 $db = db
-sql create database $db replica 1 maxTables $totalTableNum
+sql create database $db replica 1
 sql use $db
 
 # create table , insert data
@@ -352,16 +357,16 @@ if $loopCnt == 10 then
 endi
 
 sql show vgroups
-print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1
-print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2
-print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3
-print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1  $data10_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2  $data10_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3  $data10_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4  $data10_4
 #print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
 #print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
-$thirdDnode_2 = $data8_1 
-$thirdDnode_3 = $data8_2 
-$thirdDnode_4 = $data8_3 
-$thirdDnode_5 = $data8_4 
+$thirdDnode_2 = $data10_1 
+$thirdDnode_3 = $data10_2 
+$thirdDnode_4 = $data10_3 
+$thirdDnode_5 = $data10_4 
 
 if $thirdDnode_2 != null then
   sleep 2000
@@ -405,10 +410,10 @@ print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $dat
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4
 #print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
 #print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
-$sencodDnode_2 = $data5_1 
-$sencodDnode_3 = $data5_2 
-$sencodDnode_4 = $data5_3 
-$sencodDnode_5 = $data5_4 
+$sencodDnode_2 = $data7_1 
+$sencodDnode_3 = $data7_2 
+$sencodDnode_4 = $data7_3 
+$sencodDnode_5 = $data7_4 
 
 if $sencodDnode_2 != null then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim b/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim
index 9b001820f6..654983bb0f 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,7 +66,7 @@ $totalTableNum = 10
 $sleepTimer = 10000
 
 $db = db
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
diff --git a/tests/script/unique/arbitrator/dn3_mn1_stopDnode_timeout.sim b/tests/script/unique/arbitrator/dn3_mn1_stopDnode_timeout.sim
index 152a65a75a..32674acade 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_stopDnode_timeout.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_stopDnode_timeout.sim
@@ -39,10 +39,10 @@ system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
 
-system sh/cfg.sh -n dnode1 -c offlineThreshold -v 10
-system sh/cfg.sh -n dnode2 -c offlineThreshold -v 10
-system sh/cfg.sh -n dnode3 -c offlineThreshold -v 10
-system sh/cfg.sh -n dnode4 -c offlineThreshold -v 10
+system sh/cfg.sh -n dnode1 -c offlineThreshold -v 5
+system sh/cfg.sh -n dnode2 -c offlineThreshold -v 5
+system sh/cfg.sh -n dnode3 -c offlineThreshold -v 5
+system sh/cfg.sh -n dnode4 -c offlineThreshold -v 5
 
 system sh/cfg.sh -n dnode1 -c enableCoreFile -v 1
 system sh/cfg.sh -n dnode2 -c enableCoreFile -v 1
@@ -182,7 +182,7 @@ system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
 system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
-system sh/cfg.sh -n dnode4 -c offlineThreshold -v 10
+system sh/cfg.sh -n dnode4 -c offlineThreshold -v 5
 system sh/cfg.sh -n dnode4 -c enableCoreFile -v 1
 
 system sh/exec.sh -n dnode4 -s start
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
index 13c3517e24..3c47fdf93b 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -137,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -212,8 +218,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -286,8 +292,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
index 0b4e385785..6b107aed60 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,7 +66,7 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -143,8 +149,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data4_2
-$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data9_2
 
 if $dnode3Vtatus != offline then
   sleep 2000
@@ -233,8 +239,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != master then
   sleep 2000
@@ -312,8 +318,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -392,8 +398,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus == offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
index c464d4023f..7e71fe3a8d 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -195,8 +201,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -268,8 +274,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -324,8 +330,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != slave then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim
index f2aa000170..8cd31e4de6 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,7 +66,7 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -157,8 +163,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -230,8 +236,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -286,8 +292,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != slave then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
index cf20122d4c..43538cf95a 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -56,11 +62,10 @@ sql create dnode $hostname3
 sql create dnode $hostname4
 sleep 3000
 
-$totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
@@ -141,8 +146,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -201,8 +206,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -301,8 +306,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -417,8 +422,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim
index ce05b0b5ff..5b5a9deffa 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,7 +66,7 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2 
 sql use $db
 
 # create table , insert data
@@ -143,8 +149,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data4_2
-$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data9_2
 
 if $dnode3Vtatus != offline then
   sleep 2000
@@ -233,8 +239,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != master then
   sleep 2000
@@ -312,8 +318,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -391,8 +397,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data7_2
-$dnode3Vtatus = $data4_2
+$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data6_2
 
 if $dnode2Vtatus == offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim
index f5bcd055a0..7696168bb9 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim
@@ -34,6 +34,17 @@ system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
 system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
 system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
 
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 20
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
+
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
@@ -56,11 +67,10 @@ sql create dnode $hostname3
 sql create dnode $hostname4
 sleep 3000
 
-$totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
@@ -146,8 +156,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -169,7 +179,7 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db1
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -254,8 +264,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data4_3
-$dnode2Vtatus = $data7_3
+$dnode3Vtatus = $data6_3
+$dnode2Vtatus = $data9_3
 
 if $dnode3Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
index 18ffb32eed..ea5e7608ee 100644
--- a/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -138,8 +144,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim b/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim
index 6e85429b77..6fa1da4e1d 100644
--- a/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
 #system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 #system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -58,11 +64,10 @@ sleep 3000
 
 $totalTableNum = 10
 $sleepTimer = 3000
-$maxTables = $totalTableNum * 2
 
 $db = db
-print create database $db replica 2 maxTables $maxTables
-sql create database $db replica 2 maxTables $maxTables
+print create database $db replica 2
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -143,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
index 0356f72a97..1d2a83c825 100644
--- a/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 20
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -59,11 +65,9 @@ sleep 3000
 $totalTableNum = 10
 $sleepTimer = 3000
 
-$maxTables = $totalTableNum * 2
-
 $db = db
-print create database $db replica 2 maxTables $maxTables
-sql create database $db replica 2 maxTables $maxTables
+print create database $db replica 2 
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -144,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim b/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
index dc2586b43b..630b4eaab8 100644
--- a/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
index 721c7d60ba..43dba536c7 100644
--- a/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2 
+sql create database $db replica 2 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
index 897c662b51..09a2424c85 100644
--- a/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim b/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim
index 95ae8047fa..d94f341236 100644
--- a/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim
@@ -19,20 +19,21 @@ system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
 system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
 system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
 
-system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
-
 #system sh/cfg.sh -n dnode1 -c alternativeRole -v 1
 #system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 #system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 #system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 20
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -58,11 +59,10 @@ sleep 3000
 
 $totalTableNum = 10
 $sleepTimer = 3000
-$maxTables = $totalTableNum * 2
 
 $db = db
-print create database $db replica 3 maxTables $maxTables
-sql create database $db replica 3 maxTables $maxTables
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
index a60f810eea..fc1c69709a 100644
--- a/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 20
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 20
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -61,8 +67,8 @@ $sleepTimer = 3000
 $maxTables = $totalTableNum * 2
 
 $db = db
-print create database $db replica 3 maxTables $maxTables
-sql create database $db replica 3 maxTables $maxTables
+print create database $db replica 3
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
@@ -143,8 +149,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim b/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
index a619cbe826..72727f3df0 100644
--- a/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
index 3b7ee869ed..7e57b0a971 100644
--- a/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/replica_changeWithArbitrator.sim b/tests/script/unique/arbitrator/replica_changeWithArbitrator.sim
index 1b2c8d1db6..a16e765a30 100644
--- a/tests/script/unique/arbitrator/replica_changeWithArbitrator.sim
+++ b/tests/script/unique/arbitrator/replica_changeWithArbitrator.sim
@@ -34,10 +34,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 0
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 0
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 0
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 12
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -65,7 +71,7 @@ sql connect
 $totalTableNum = 12
 
 $db = db
-sql create database $db replica 1 maxTables  $totalTableNum
+sql create database $db replica 1
 sql use $db
 
 # create table , insert data
diff --git a/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim b/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
index 4f66e5c135..8775da607c 100644
--- a/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim b/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
index 7bcd148bc9..84ae9554f3 100644
--- a/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2
+sql create database $db replica 2
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_dropDb.sim b/tests/script/unique/arbitrator/sync_replica2_dropDb.sim
index f61b1e3cb9..c9dc302d3c 100644
--- a/tests/script/unique/arbitrator/sync_replica2_dropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_dropDb.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2 
+sql create database $db replica 2 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_dropTable.sim b/tests/script/unique/arbitrator/sync_replica2_dropTable.sim
index b27558fdf0..b7392eb960 100644
--- a/tests/script/unique/arbitrator/sync_replica2_dropTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_dropTable.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 2 maxTables $totalTableNum
-sql create database $db replica 2 maxTables $totalTableNum
+print create database $db replica 2 
+sql create database $db replica 2 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim b/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
index 2a283a6a0c..2fde90f3db 100644
--- a/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim b/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
index 7d321ed381..f31d01b327 100644
--- a/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_createTable.sim b/tests/script/unique/arbitrator/sync_replica3_createTable.sim
index 1b93cc09f2..a07e6dc93d 100644
--- a/tests/script/unique/arbitrator/sync_replica3_createTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_createTable.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim b/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
index f5ceced668..c8663b0009 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 40
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -59,9 +65,10 @@ sleep 3000
 $totalTableNum = 20
 $sleepTimer = 3000
 
+$maxTables = $totalTableNum * 2 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 maxTables $maxTables
+sql create database $db replica 3 maxTables $maxTables
 sql use $db
 
 # create table , insert data
@@ -137,8 +144,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -205,8 +212,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != slave then
   sleep 2000
@@ -238,8 +245,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != master then
   sleep 2000
@@ -312,8 +319,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != slave then
   sleep 2000
@@ -345,8 +352,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != master then
   sleep 2000
@@ -435,8 +442,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != slave then
   sleep 2000
@@ -468,8 +475,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != master then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_dropDb.sim b/tests/script/unique/arbitrator/sync_replica3_dropDb.sim
index 0f7ee50c39..fd07fda2d4 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dropDb.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_dropTable.sim b/tests/script/unique/arbitrator/sync_replica3_dropTable.sim
index 9c33dd8bb4..1749477d64 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dropTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dropTable.sim
@@ -29,10 +29,16 @@ system sh/cfg.sh -n dnode2 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode3 -c alternativeRole -v 2
 system sh/cfg.sh -n dnode4 -c alternativeRole -v 2
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+$totalTableNum = 10
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v $totalTableNum
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v $totalTableNum
+
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 1
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 1
 
 system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
 system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
@@ -60,8 +66,8 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
@@ -142,8 +148,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data4_2
-$dnode3Vtatus = $data7_2
+$dnode4Vtatus = $data6_2
+$dnode3Vtatus = $data9_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/big/balance.sim b/tests/script/unique/big/balance.sim
index b2a15b0b96..259951581e 100644
--- a/tests/script/unique/big/balance.sim
+++ b/tests/script/unique/big/balance.sim
@@ -1,23 +1,28 @@
 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000
 
 system sh/deploy.sh -n dnode2 -i 2
 system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 1000
 
 system sh/deploy.sh -n dnode3 -i 3
 system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 1000
 
 system sh/deploy.sh -n dnode4 -i 4
 system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode4 -c maxTablesPerVnode -v 1000
 
 system sh/deploy.sh -n dnode5 -i 5
 system sh/cfg.sh -n dnode5 -c numOfTotalVnodes -v 4
-system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 1000
+system sh/cfg.sh -n dnode5 -c maxVgroupsPerDb -v 4
+system sh/cfg.sh -n dnode5 -c maxTablesPerVnode -v 1000
 
 print =============== prepare data
 system sh/exec.sh -n dnode1 -s start
diff --git a/tests/script/unique/big/maxvnodes.sim b/tests/script/unique/big/maxvnodes.sim
index ab93474a43..9603b5de64 100644
--- a/tests/script/unique/big/maxvnodes.sim
+++ b/tests/script/unique/big/maxvnodes.sim
@@ -9,9 +9,11 @@ $totalRows = $totalVnodes * $maxTables
 system sh/deploy.sh -n dnode1 -i 1
 system sh/cfg.sh -n dnode1 -c walLevel            -v 2
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes    -v $totalVnodes
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb     -v $totalVnodes
 system sh/deploy.sh -n dnode2 -i 2
 system sh/cfg.sh -n dnode2 -c walLevel            -v 2
 system sh/cfg.sh -n dnode2 -c numOfTotalVnodes    -v $totalVnodes
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb    -v $totalVnodes
 
 
 print ==========  prepare data
diff --git a/tests/script/unique/cluster/client3.sim b/tests/script/unique/cluster/client3.sim
new file mode 100644
index 0000000000..4b3024f881
--- /dev/null
+++ b/tests/script/unique/cluster/client3.sim
@@ -0,0 +1,55 @@
+$tblStart = 0
+$tblEnd = 10000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+loop_lable:
+print ====================== client3 start loop: dynamic create table and insert data, select, drop table ............
+
+$totalRows = 0
+
+#sql create table $stb ( ts timestamp, c1 int) tags ( t1 int, t2 binary(16) )
+$tagBinary = ' . client3
+$tagBinary = $tagBinary . '
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = dtb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb using $stb tags ( $i , $tagBinary ) values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x  
+#  print ====== app insert totalRows: $totalRows  
+  $i = $i + 1
+endw 
+   
+sql select count(*) from $stb where t2 == $tagBinary
+if $data00 != $totalRows then
+  print data00 $data00 totalRows $totalRows
+  print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  print ************ client3   insert loss: $deltaRows *****
+  print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+endi
+
+print ====================== client3 drop table
+$i = $tblStart
+while $i < $tblEnd
+  $tb = dtb . $i
+  sql drop table if exists $tb 
+  $i = $i + 1
+endw 
+goto loop_lable
\ No newline at end of file
diff --git a/tests/script/unique/cluster/client4.sim b/tests/script/unique/cluster/client4.sim
new file mode 100644
index 0000000000..a4c347695e
--- /dev/null
+++ b/tests/script/unique/cluster/client4.sim
@@ -0,0 +1,113 @@
+$tblStart = 0
+$tblEnd = 2000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+loop_lable:
+print ====================== client4 start loop: create db2, tables and insert data, select, drop db2 ............
+
+$db = db2
+$stb = stb2
+
+print create database if not exists $db replica 2
+sql create database if not exists $db replica 2
+sql use $db
+
+print ==== client4start create table
+$i = $tblStart
+while $i < $tblEnd
+  $tb = dtb . $i
+  sql create table $tb (ts timestamp, c1 int)
+  $i = $i + 1
+endw 
+
+
+print ==== client4start insert, include multi table data in one insert sql
+$totalRows = 0
+$totalRowsPerTbl = 0
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb0 = dtb . $i
+  $i = $i + 1
+  $tb1 = dtb . $i
+  $i = $i + 1
+  $tb2 = dtb . $i
+  $i = $i + 1
+  $tb3 = dtb . $i
+  $i = $i + 1
+  $tb4 = dtb . $i  
+  $i = $i + 1  
+  
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb0 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb1 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb2 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb3 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb4 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) 
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+  
+  $totalRowsPerTbl = $totalRowsPerTbl + $x
+  $x = $x * 5
+  $totalRows = $totalRows + $x  
+endw 
+   
+sql select count(*) from tb10
+if $data00 != $totalRowsPerTbl then
+  print data00 $data00 totalRowsPerTbl $totalRowsPerTbl
+  print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  print ************ client4   insert loss: $deltaRows *****
+  print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+endi
+
+
+print ====client4 start alter table
+$i = $tblStart
+while $i < $tblEnd
+  $tb = dtb . $i
+  sql alter table $tb add c2 float
+  $i = $i + 1
+endw 
+
+print ====client4 continue insert, include multi table data in one insert sql
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb0 = dtb . $i
+  $i = $i + 1
+  $tb1 = dtb . $i
+  $i = $i + 1
+  $tb2 = dtb . $i
+  $i = $i + 1
+  $tb3 = dtb . $i
+  $i = $i + 1
+  $tb4 = dtb . $i  
+  $i = $i + 1  
+  
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb0 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb1 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb2 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb3 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) $tb4 values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) 
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+  
+  $totalRowsPerTbl = $totalRowsPerTbl + $x
+  $x = $x * 5
+  $totalRows = $totalRows + $x  
+endw 
+   
+sql select count(*) from tb10
+if $data00 != $totalRowsPerTbl then
+  print data00 $data00 totalRowsPerTbl $totalRowsPerTbl
+  print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  print ************ client4   insert loss: $deltaRows *****
+  print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+endi
+
+print ====================== client4 drop database
+sql drop if exists database $db 
+goto loop_lable
\ No newline at end of file
diff --git a/tests/script/unique/cluster/client5.sim b/tests/script/unique/cluster/client5.sim
new file mode 100644
index 0000000000..1fe6298ae7
--- /dev/null
+++ b/tests/script/unique/cluster/client5.sim
@@ -0,0 +1,53 @@
+$tblStart = 0
+$tblEnd = 2000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+$tsEnd   = 1325347210000
+###############################################################
+
+sql connect
+$db = db1
+$stb = stb1
+#subtable: tb0 - tb4999
+#print create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+
+sleep 20000 # wait other client insert data
+
+loop_lable:
+print ====================== client5 start loop query
+
+sql use $db   
+
+sql select count(*) from $stb
+
+$tsQueryStart = $tsStart
+$tsQueryStart = $tsStart + 90000
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart order by ts asc limit 500 offset 7
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart order by ts desc limit 500 offset 7
+
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client1_0'
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client1_1'
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client1_2'
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client1_3'
+
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client2_0'
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client2_1'
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client2_2'
+sql select * from $stb where ts > $tsQueryStart and ts < $tsQueryStart and t2 == 'client2_3'
+
+sql select min(c1)      from $stb
+sql select max(c1)      from $stb
+sql select first(*)     from $stb
+sql select last(*)      from $stb
+sql select last_row(*)  from $stb
+sql select sum(c1)      from $stb
+sql select avg(c1)      from $stb
+
+sql select min(c1)      from tb1
+sql select max(c1)      from tb10
+sql select first(*)     from tb100
+sql select last(*)      from tb1000
+sql select last_row(*)  from tb20
+sql select sum(c1)      from tb200
+sql select avg(c1)      from tb2000
+
+goto loop_lable
\ No newline at end of file
diff --git a/tests/script/unique/cluster/cluster_main.sim b/tests/script/unique/cluster/cluster_main.sim
index 236f1aa59a..4c02d416f3 100644
--- a/tests/script/unique/cluster/cluster_main.sim
+++ b/tests/script/unique/cluster/cluster_main.sim
@@ -71,7 +71,7 @@ print ============== step3: create stable stb1
 $stb = stb1
 sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
 
-print ============== step4: start 10 client1/ 10 client2/ 10 client3/ 10 client4/ 1 client5
+print ============== step4: start back client1_0.sim
 run_back unique/cluster/client1_0.sim
 #run_back unique/cluster/client1_1.sim
 #run_back unique/cluster/client1_2.sim
@@ -106,27 +106,43 @@ endi
 print wait for a while to let clients start insert data
 sleep 5000    
 
-$loop_cnt = 0
-loop_cluster_do:
-print **** **** **** START loop cluster do (loop_cnt: $loop_cnt )**** **** **** ****
-print ============== step5: start dnode4/dnode5 and add into cluster, then wait ready
-system sh/exec.sh -n dnode4 -s start
-system sh/exec.sh -n dnode5 -s start
+print ============== step4-1: add dnode4/dnode5 into cluster
 sql create dnode $hostname4
 sql create dnode $hostname5
 
-sleep 5000
-
-
-print ============== step6: stop and drop dnode1, then remove data dir of dnode1 
-system sh/exec.sh -n dnode1 -s stop -x SIGINT
-sleep 5000
-sql drop dnode $hostname1
-sleep 5000
-
-system rm -rf ../../../sim/dnode1/data
+$loop_cnt = 0
+loop_cluster_do:
+print **** **** **** START loop cluster do (loop_cnt: $loop_cnt )**** **** **** ****
+print ============== step5: start dnode4/dnode5
+system sh/exec.sh -n dnode4 -s start
+system sh/exec.sh -n dnode5 -s start
 sleep 20000
 
+print ============== step6: stop dnode1
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 10000
+#sql drop dnode $hostname1
+#sleep 5000
+
+#system rm -rf ../../../sim/dnode1/data
+#sleep 20000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step6-1: restart dnode1
+system sh/exec.sh -n dnode1 -s start
+sleep 10000
 sql show mnodes
 print show mnodes
 print rows: $rows
@@ -139,7 +155,6 @@ print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
 print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
 print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
 print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
-return -1
 
 print ============== step7: stop dnode2 
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
@@ -236,14 +251,17 @@ if $data04 != 2 then
   return -1
 endi
 
-print ============== step14: stop and drop dnode4/dnode5, then remove data dir of dnode4/dnode5 
+print ============== step14: stop dnode4/dnode5
 system sh/exec.sh -n dnode4 -s stop -x SIGINT
 system sh/exec.sh -n dnode5 -s stop -x SIGINT
 sleep 20000
-sql drop dnode $hostname4
-sql drop dnode $hostname5
-system rm -rf ../../../sim/dnode4/data
-system rm -rf ../../../sim/dnode5/data
+#system sh/exec.sh -n dnode4 -s start
+#system sh/exec.sh -n dnode5 -s start
+#sleep 10000
+#sql drop dnode $hostname4
+#sql drop dnode $hostname5
+#system rm -rf ../../../sim/dnode4/data
+#system rm -rf ../../../sim/dnode5/data
 
 print ============== step15: alter replica 1
 sql alter database $db replica 1
@@ -263,13 +281,13 @@ if $data04 != 2 then
   return -1
 endi
 
-print ============== step17: start dnode1 and add into cluster, then wait dnode1 ready
-system sh/cfg.sh -n dnode1 -c first -v $hostname2
-system sh/cfg.sh -n dnode1 -c second -v $hostname3
-
-system sh/exec.sh -n dnode1 -s start
-sql create dnode $hostname1
-sleep 20000
+#print ============== step17: start dnode1 and add into cluster, then wait dnode1 ready
+#system sh/cfg.sh -n dnode1 -c first -v $hostname2
+#system sh/cfg.sh -n dnode1 -c second -v $hostname3
+#
+#system sh/exec.sh -n dnode1 -s start
+#sql create dnode $hostname1
+#sleep 20000
 
 print ============== step18: alter replica 3
 sql alter database $db replica 3
diff --git a/tests/script/unique/cluster/cluster_main0.sim b/tests/script/unique/cluster/cluster_main0.sim
new file mode 100644
index 0000000000..f3cce9fd45
--- /dev/null
+++ b/tests/script/unique/cluster/cluster_main0.sim
@@ -0,0 +1,288 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+system sh/deploy.sh -n dnode5 -i 5
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode5 -c numOfMnodes -v 3
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 1
+system sh/cfg.sh -n dnode2 -c walLevel -v 1
+system sh/cfg.sh -n dnode3 -c walLevel -v 1
+system sh/cfg.sh -n dnode4 -c walLevel -v 1
+system sh/cfg.sh -n dnode5 -c walLevel -v 1
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode5 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode5 -c numOfTotalVnodes -v 256
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode5 -c alternativeRole -v 0
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 5000
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode5 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1/dnode2/dnode3
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+sleep 3000
+sql connect
+sql create dnode $hostname2
+sql create dnode $hostname3
+sleep 3000
+
+print ============== step2: create db1 with replica 3
+$db = db1
+print create database $db replica 3
+#sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica 3
+sql use $db
+
+print ============== step3: create stable stb1
+$stb = stb1
+print create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+
+print ============== step4: start others client
+run_back unique/cluster/client1_0.sim
+run_back unique/cluster/client1_1.sim
+run_back unique/cluster/client1_2.sim
+run_back unique/cluster/client1_3.sim
+#run_back unique/cluster/client2_0.sim
+#run_back unique/cluster/client2_1.sim
+#run_back unique/cluster/client2_2.sim
+#run_back unique/cluster/client2_3.sim
+#run_back unique/cluster/client3.sim
+#run_back unique/cluster/client4.sim
+
+sleep 20000
+
+wait_subsim_insert_complete_create_tables:
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+if $data00 < 1000 then
+  sleep 3000
+  goto wait_subsim_insert_complete_create_tables
+endi
+
+wait_subsim_insert_data:
+print select count(*) from $stb
+sql select count(*) from $stb
+print data00 $data00
+if $data00 < 1000 then
+  sleep 3000
+  goto wait_subsim_insert_data
+endi
+
+print wait for a while to let clients start insert data
+sleep 5000    
+
+$loop_cnt = 0
+loop_cluster_do:
+print **** **** **** START loop cluster do (loop_cnt: $loop_cnt )**** **** **** ****
+print ============== step5: start dnode4/dnode5 and add into cluster, then wait ready
+system sh/exec.sh -n dnode4 -s start
+system sh/exec.sh -n dnode5 -s start
+sql create dnode $hostname4
+sql create dnode $hostname5
+
+sleep 5000
+
+
+print ============== step6: stop dnode1
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 10000
+#sql drop dnode $hostname1
+#sleep 5000
+#system rm -rf ../../../sim/dnode1/data
+#sleep 20000
+print ============== step6-1: restart dnode1
+system sh/exec.sh -n dnode1 -s start
+sleep 10000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step7: stop dnode2 
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step8: restart dnode2, then wait sync end
+system sh/exec.sh -n dnode2 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step9: stop dnode3, then wait sync end
+system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step10: restart dnode3, then wait sync end
+system sh/exec.sh -n dnode3 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step11: stop dnode4, then wait sync end
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep 20000
+
+print ============== step12: restart dnode4, then wait sync end
+system sh/exec.sh -n dnode4 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step13: alter replica 2
+sql alter database $db replica 2
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+
+if $data04 != 2 then
+  print rplica is not modify to 2, error!!!!!!
+  return -1
+endi
+
+print ============== step14: stop and drop dnode4/dnode5, then remove data dir of dnode4/dnode5 
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+system sh/exec.sh -n dnode5 -s stop -x SIGINT
+sleep 3000
+sql drop dnode $hostname4
+sql drop dnode $hostname5
+system rm -rf ../../../sim/dnode4/data
+system rm -rf ../../../sim/dnode5/data
+sleep 20000
+
+print ============== step15: alter replica 1
+sql alter database $db replica 1
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09
+if $data04 != 1 then
+  print rplica is not modify to 1, error!!!!!!
+  return -1
+endi
+
+print ============== step16: alter replica 2
+sql alter database $db replica 2
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09
+if $data04 != 2 then
+  print rplica is not modify to 2, error!!!!!!
+  return -1
+endi
+
+#print ============== step17: start dnode1 and add into cluster, then wait dnode1 ready
+#system sh/cfg.sh -n dnode1 -c first -v $hostname2
+#system sh/cfg.sh -n dnode1 -c second -v $hostname3
+#
+#system sh/exec.sh -n dnode1 -s start
+#sql create dnode $hostname1
+#sleep 20000
+
+print ============== step18: alter replica 3
+sql alter database $db replica 3
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09
+if $data04 != 3 then
+  print rplica is not modify to 3, error!!!!!!
+  return -1
+endi
+
+print **** **** **** (loop_cnt: $loop_cnt ) end, continue...... **** **** **** ****
+$loop_cnt = $loop_cnt + 1
+goto loop_cluster_do
diff --git a/tests/script/unique/cluster/cluster_main1.sim b/tests/script/unique/cluster/cluster_main1.sim
new file mode 100644
index 0000000000..e05c30aa6d
--- /dev/null
+++ b/tests/script/unique/cluster/cluster_main1.sim
@@ -0,0 +1,330 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+system sh/deploy.sh -n dnode5 -i 5
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode5 -c numOfMnodes -v 3
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 1
+system sh/cfg.sh -n dnode2 -c walLevel -v 1
+system sh/cfg.sh -n dnode3 -c walLevel -v 1
+system sh/cfg.sh -n dnode4 -c walLevel -v 1
+system sh/cfg.sh -n dnode5 -c walLevel -v 1
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode5 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode5 -c numOfTotalVnodes -v 256
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode5 -c alternativeRole -v 0
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 5000
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode5 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1/dnode2/dnode3
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+sleep 3000
+sql connect
+sql create dnode $hostname2
+sql create dnode $hostname3
+sleep 3000
+
+print ============== step2: create db1 with replica 3
+$replica = 3
+$db = db1
+print create database $db replica $replica
+#sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica $replica
+sql use $db
+
+print ============== step3: create stable stb1
+$stb = stb1
+print create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+
+print ============== step4: start others client
+run_back unique/cluster/main1_client1_0.sim
+run_back unique/cluster/main1_client1_1.sim
+run_back unique/cluster/main1_client1_2.sim
+run_back unique/cluster/main1_client1_3.sim
+run_back unique/cluster/client3.sim
+run_back unique/cluster/client4.sim
+run_back unique/cluster/client5.sim
+
+sleep 20000
+
+wait_subsim_insert_complete_create_tables:
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+if $data00 < 1000 then
+  sleep 3000
+  goto wait_subsim_insert_complete_create_tables
+endi
+
+wait_subsim_insert_data:
+print select count(*) from $stb
+sql select count(*) from $stb
+print data00 $data00
+if $data00 < 1000 then
+  sleep 3000
+  goto wait_subsim_insert_data
+endi
+
+print wait for a while to let clients start insert data
+sleep 5000    
+
+print ============== step4-1: add dnode4/dnode5 into cluster
+sql create dnode $hostname4
+sql create dnode $hostname5
+sleep 5000
+
+$loop_cnt = 0
+loop_cluster_do:
+print **** **** **** START loop cluster do (loop_cnt: $loop_cnt )**** **** **** ****
+print ============== step5: start dnode4/dnode5
+system sh/exec.sh -n dnode4 -s start
+system sh/exec.sh -n dnode5 -s start
+sleep 20000
+
+print ============== step6: stop dnode1
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 10000
+#sql drop dnode $hostname1
+#sleep 5000
+#system rm -rf ../../../sim/dnode1/data
+#sleep 20000
+print ============== step6-1: restart dnode1
+system sh/exec.sh -n dnode1 -s start
+sleep 10000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step7: stop dnode2 
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step8: restart dnode2, then wait sync end
+system sh/exec.sh -n dnode2 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step9: stop dnode3, then wait sync end
+system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step10: restart dnode3, then wait sync end
+system sh/exec.sh -n dnode3 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step11: stop dnode4, then wait sync end
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep 20000
+
+#print ============== step12: restart dnode4, then wait sync end
+#system sh/exec.sh -n dnode4 -s start
+#sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step13: alter replica 2
+sql alter database $db replica 2
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 2 then
+  print rplica is not modify to 2, error!!!!!!
+  return -1
+endi
+
+print ============== step14: stop dnode5
+system sh/exec.sh -n dnode5 -s stop -x SIGINT
+sleep 20000
+#system rm -rf ../../../sim/dnode5/data
+
+#print ============== step14-1: drop dnode5, then remove data dir
+#sql drop dnode $hostname5
+#sleep 20000
+#system rm -rf ../../../sim/dnode5/data
+
+print ============== step15: alter replica 1
+sql alter database $db replica 1
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 1 then
+  print rplica is not modify to 1, error!!!!!!
+  return -1
+endi
+
+print ============== step16: alter replica 2
+sql alter database $db replica 2
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 2 then
+  print rplica is not modify to 2, error!!!!!!
+  return -1
+endi
+
+#print ============== step17: start dnode1 and add into cluster, then wait dnode1 ready
+#system sh/cfg.sh -n dnode1 -c first -v $hostname2
+#system sh/cfg.sh -n dnode1 -c second -v $hostname3
+#
+#system sh/exec.sh -n dnode1 -s start
+#sql create dnode $hostname1
+#sleep 20000
+
+print ============== step18: alter replica 3
+sql alter database $db replica 3
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 3 then
+  print rplica is not modify to 3, error!!!!!!
+  return -1
+endi
+
+print **** **** **** (loop_cnt: $loop_cnt ) end, continue...... **** **** **** ****
+$loop_cnt = $loop_cnt + 1
+goto loop_cluster_do
diff --git a/tests/script/unique/cluster/cluster_main2.sim b/tests/script/unique/cluster/cluster_main2.sim
new file mode 100644
index 0000000000..9c682de041
--- /dev/null
+++ b/tests/script/unique/cluster/cluster_main2.sim
@@ -0,0 +1,334 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+system sh/deploy.sh -n dnode5 -i 5
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 3
+system sh/cfg.sh -n dnode5 -c numOfMnodes -v 3
+
+system sh/cfg.sh -n dnode1 -c walLevel -v 1
+system sh/cfg.sh -n dnode2 -c walLevel -v 1
+system sh/cfg.sh -n dnode3 -c walLevel -v 1
+system sh/cfg.sh -n dnode4 -c walLevel -v 1
+system sh/cfg.sh -n dnode5 -c walLevel -v 1
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode5 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 256
+system sh/cfg.sh -n dnode5 -c numOfTotalVnodes -v 256
+
+system sh/cfg.sh -n dnode1 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode2 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode3 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode4 -c alternativeRole -v 0
+system sh/cfg.sh -n dnode5 -c alternativeRole -v 0
+
+system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 5000
+system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 5000
+
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode5 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+print ============== step1: start dnode1/dnode2/dnode3
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+sleep 3000
+sql connect
+sql create dnode $hostname2
+sql create dnode $hostname3
+sleep 3000
+
+print ============== step2: create db1 with replica 3
+$replica = 3
+$db = db1
+print create database $db replica $replica
+#sql create database $db replica 3 maxTables $totalTableNum
+sql create database $db replica $replica
+sql use $db
+
+print ============== step3: create stable stb1
+$stb = stb1
+print create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(16))
+
+print ============== step4: start others client
+run_back unique/cluster/main2_client1_0.sim
+run_back unique/cluster/main2_client1_1.sim
+run_back unique/cluster/main2_client1_2.sim
+run_back unique/cluster/main2_client1_3.sim
+run_back unique/cluster/main2_client2_0.sim
+run_back unique/cluster/main2_client2_1.sim
+run_back unique/cluster/main2_client2_2.sim
+run_back unique/cluster/main2_client2_3.sim
+run_back unique/cluster/client3.sim
+run_back unique/cluster/client4.sim
+run_back unique/cluster/client5.sim
+
+sleep 20000
+
+wait_subsim_insert_complete_create_tables:
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+if $data00 < 1000 then
+  sleep 3000
+  goto wait_subsim_insert_complete_create_tables
+endi
+
+wait_subsim_insert_data:
+print select count(*) from $stb
+sql select count(*) from $stb
+print data00 $data00
+if $data00 < 1000 then
+  sleep 3000
+  goto wait_subsim_insert_data
+endi
+
+print wait for a while to let clients start insert data
+sleep 5000    
+
+print ============== step4-1: add dnode4/dnode5 into cluster
+sql create dnode $hostname4
+sql create dnode $hostname5
+sleep 5000
+
+
+$loop_cnt = 0
+loop_cluster_do:
+print **** **** **** START loop cluster do (loop_cnt: $loop_cnt )**** **** **** ****
+print ============== step5: start dnode4/dnode5
+system sh/exec.sh -n dnode4 -s start
+system sh/exec.sh -n dnode5 -s start
+
+print ============== step6: stop dnode1
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 10000
+#sql drop dnode $hostname1
+#sleep 5000
+#system rm -rf ../../../sim/dnode1/data
+#sleep 20000
+print ============== step6-1: restart dnode1
+system sh/exec.sh -n dnode1 -s start
+sleep 10000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step7: stop dnode2 
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 5000
+
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step8: restart dnode2, then wait sync end
+system sh/exec.sh -n dnode2 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step9: stop dnode3, then wait sync end
+system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step10: restart dnode3, then wait sync end
+system sh/exec.sh -n dnode3 -s start
+sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step11: stop dnode4, then wait sync end
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
+sleep 20000
+
+#print ============== step12: restart dnode4, then wait sync end
+#system sh/exec.sh -n dnode4 -s start
+#sleep 20000
+sql show mnodes
+print show mnodes
+print rows: $rows
+print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1
+print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2
+print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3
+print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4
+print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
+print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
+print $data0_7  $data1_7  $data2_7  $data3_7  $data4_7
+print $data0_8  $data1_8  $data2_8  $data3_8  $data4_8
+print $data0_9  $data1_9  $data2_9  $data3_9  $data4_9
+
+print ============== step13: alter replica 2
+sql alter database $db replica 2
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 2 then
+  print rplica is not modify to 2, error!!!!!!
+  return -1
+endi
+
+print ============== step14: drop dnode5, then remove data dir
+system sh/exec.sh -n dnode5 -s stop -x SIGINT
+sleep 20000
+#system rm -rf ../../../sim/dnode5/data
+
+#print ============== step14-1: drop dnode5, then remove data dir
+#sql drop dnode $hostname5
+#sleep 20000
+#system rm -rf ../../../sim/dnode5/data
+
+print ============== step15: alter replica 1
+sql alter database $db replica 1
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 1 then
+  print rplica is not modify to 1, error!!!!!!
+  return -1
+endi
+
+print ============== step16: alter replica 2
+sql alter database $db replica 2
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 2 then
+  print rplica is not modify to 2, error!!!!!!
+  return -1
+endi
+
+#print ============== step17: start dnode1 and add into cluster, then wait dnode1 ready
+#system sh/cfg.sh -n dnode1 -c first -v $hostname2
+#system sh/cfg.sh -n dnode1 -c second -v $hostname3
+#
+#system sh/exec.sh -n dnode1 -s start
+#sql create dnode $hostname1
+#sleep 20000
+
+print ============== step18: alter replica 3
+sql alter database $db replica 3
+sql show databases
+print $data00  $data01  $data02  $data03  $data04  $data05  $data06  $data07   $data08  $data09 
+print $data10  $data11  $data12  $data13  $data14  $data15  $data16  $data17   $data18  $data19 
+
+if $data00 == db1 then
+  $replica = $data04
+elif $data10 == db1 then
+  $replica = $data14
+else then
+  print ==== db1 already not exists!!!!!
+  return -1
+endi
+
+if $replica != 3 then
+  print rplica is not modify to 3, error!!!!!!
+  return -1
+endi
+
+print **** **** **** (loop_cnt: $loop_cnt ) end, continue...... **** **** **** ****
+$loop_cnt = $loop_cnt + 1
+goto loop_cluster_do
diff --git a/tests/script/unique/cluster/main1_client1_0.sim b/tests/script/unique/cluster/main1_client1_0.sim
new file mode 100644
index 0000000000..d4f2aa4294
--- /dev/null
+++ b/tests/script/unique/cluster/main1_client1_0.sim
@@ -0,0 +1,94 @@
+#system sh/stop_dnodes.sh
+#system sh/deploy.sh -n dnode1 -i 1
+#system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 10000
+#system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 256
+#system sh/exec.sh -n dnode1 -s start
+#sql connect
+#$db = db1
+#sql create database $db
+#sql use $db
+#$stb = stb1
+#sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+
+
+$tblStart = 0
+$tblEnd = 1000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_0
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_0 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) -x insert_error_loop
+    $x = $x + 20
+    $ts = $ts + 40a
+    goto continue_next_0
+    insert_error_loop:
+    print ============== main1_client1_0 run error: sql insert into $tb values ( $ts + 0a , $x ) ... ...
+    continue_next_0:
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    if $data00 != $totalRows then
+      print data00 $data00 totalRows $totalRows
+      $deltaRows = $totalRows - $data00
+      if $lastLossRows == 0 then 
+        $lastLossRows = $deltaRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_0 insert loss: $deltaRows *****
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+      elif $deltaRows != $lastLossRows
+        $tmp = $deltaRows - $lastLossRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_0 insert loss: $tmp ***********
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        $lastLossRows = $deltaRows
+      endi
+#	    return -1
+    endi
+    goto continue_next_1
+    query_error_loop:
+    print ============== main1_client1_0 run error: sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    continue_next_1:
+    print ====================== client1_0  insert data complete once ............
+  endi
+endw 
+print ====================== client1_0  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main1_client1_1.sim b/tests/script/unique/cluster/main1_client1_1.sim
new file mode 100644
index 0000000000..b50f533ce1
--- /dev/null
+++ b/tests/script/unique/cluster/main1_client1_1.sim
@@ -0,0 +1,82 @@
+$tblStart = 1000
+$tblEnd = 2000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_1
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_1 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) -x insert_error_loop
+    $x = $x + 20
+    $ts = $ts + 40a
+    goto continue_next_0
+    insert_error_loop:
+    print ============== main1_client1_1 run error: sql insert into $tb values ( $ts + 0a , $x ) ... ...
+    continue_next_0:
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    if $data00 != $totalRows then
+      print data00 $data00 totalRows $totalRows
+      $deltaRows = $totalRows - $data00
+      if $lastLossRows == 0 then 
+        $lastLossRows = $deltaRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_1 insert loss: $deltaRows *****
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+      elif $deltaRows != $lastLossRows
+        $tmp = $deltaRows - $lastLossRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_1 insert loss: $tmp ***********
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        $lastLossRows = $deltaRows
+      endi
+#	    return -1
+    endi
+    goto continue_next_1
+    query_error_loop:
+    print ============== main1_client1_1 run error: sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    continue_next_1:
+    print ====================== client1_2  insert data complete once ............
+  endi
+endw 
+print ====================== client1_1  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main1_client1_2.sim b/tests/script/unique/cluster/main1_client1_2.sim
new file mode 100644
index 0000000000..8cc39ded04
--- /dev/null
+++ b/tests/script/unique/cluster/main1_client1_2.sim
@@ -0,0 +1,81 @@
+$tblStart = 2000
+$tblEnd = 3000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_2
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_2 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) -x insert_error_loop
+    $x = $x + 20
+    $ts = $ts + 40a
+    goto continue_next_0
+    insert_error_loop:
+    print ============== main1_client1_2 run error: sql insert into $tb values ( $ts + 0a , $x ) ... ...
+    continue_next_0:
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    if $data00 != $totalRows then
+      print data00 $data00 totalRows $totalRows
+      $deltaRows = $totalRows - $data00
+      if $lastLossRows == 0 then 
+        $lastLossRows = $deltaRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_2 insert loss: $deltaRows *****
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+      elif $deltaRows != $lastLossRows
+        $tmp = $deltaRows - $lastLossRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_2 insert loss: $tmp ***********
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        $lastLossRows = $deltaRows
+      endi
+#	    return -1
+    endi
+    goto continue_next_1
+    query_error_loop:
+    print ============== main1_client1_2 run error: sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    continue_next_1:
+    print ====================== client1_2  insert data complete once ............
+  endi
+endw 
+print ====================== client1_2  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main1_client1_3.sim b/tests/script/unique/cluster/main1_client1_3.sim
new file mode 100644
index 0000000000..72e1be48ac
--- /dev/null
+++ b/tests/script/unique/cluster/main1_client1_3.sim
@@ -0,0 +1,81 @@
+$tblStart = 3000
+$tblEnd = 4000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_3
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_3 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x ) -x insert_error_loop
+    $x = $x + 20
+    $ts = $ts + 40a
+    goto continue_next_0
+    insert_error_loop:
+    print ============== main1_client1_3 run error: sql insert into $tb values ( $ts + 0a , $x ) ... ...
+    continue_next_0:
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    if $data00 != $totalRows then
+      print data00 $data00 totalRows $totalRows
+      $deltaRows = $totalRows - $data00
+      if $lastLossRows == 0 then 
+        $lastLossRows = $deltaRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_3 insert loss: $deltaRows *****
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+      elif $deltaRows != $lastLossRows
+        $tmp = $deltaRows - $lastLossRows
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        print ************ client1_3 insert loss: $tmp ***********
+        print ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+        $lastLossRows = $deltaRows
+      endi
+#	    return -1
+    endi
+    goto continue_next_1
+    query_error_loop:
+    print ============== main1_client1_3 run error: sql select count(*) from $stb where t2 == $tagBinary -x query_error_loop
+    continue_next_1:
+    print ====================== client1_3  insert data complete once ............
+  endi
+endw 
+print ====================== client1_3  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main1_client4.sim b/tests/script/unique/cluster/main1_client4.sim
new file mode 100644
index 0000000000..eb8049b04b
--- /dev/null
+++ b/tests/script/unique/cluster/main1_client4.sim
@@ -0,0 +1,127 @@
+$tblStart = 0
+$tblEnd = 10000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db2
+$stb = stb2
+
+loop_lable:
+print ========= start loop create db, table, inset data, alter column/tag, select, drop db
+
+sql create database if not exists $db
+sql use $db
+sql create table if not exists $stb ( ts timestamp, c1 int, c2 float ) tags ( t1 int , t2 binary(16) )
+$tagBinary = ' . client4
+$tagBinary = $tagBinary . '
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  sql create table if not exists  $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x , $x ) ( $ts + 2a , $x , $x ) ( $ts + 4a , $x , $x ) ( $ts + 6a , $x , $x ) ( $ts + 8a , $x , $x ) ( $ts + 10a , $x , $x ) ( $ts + 12a , $x , $x ) ( $ts + 14a , $x , $x ) ( $ts + 16a , $x , $x ) ( $ts + 18a , $x , $x ) ( $ts + 20a , $x , $x ) ( $ts + 22a , $x , $x ) ( $ts + 24a , $x , $x ) ( $ts + 26a , $x , $x ) ( $ts + 28a , $x , $x ) ( $ts + 30a , $x , $x ) ( $ts + 32a , $x , $x ) ( $ts + 34a , $x , $x ) ( $ts + 36a , $x , $x ) ( $ts + 38a , $x , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb -x continue_loop
+    print data00 $data00 totalRows $totalRows
+    if $data00 != $totalRows then
+	    print **********************  select error **********************
+    endi
+    continue_loop:
+    print ====================== client4  insert data complete once ............
+  endi
+endw 
+
+##################### alter column
+sql alter table $stb add column c3 double
+sql alter table $stb drop column c2
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x , $x ) ( $ts + 2a , $x , $x ) ( $ts + 4a , $x , $x ) ( $ts + 6a , $x , $x ) ( $ts + 8a , $x , $x ) ( $ts + 10a , $x , $x ) ( $ts + 12a , $x , $x ) ( $ts + 14a , $x , $x ) ( $ts + 16a , $x , $x ) ( $ts + 18a , $x , $x ) ( $ts + 20a , $x , $x ) ( $ts + 22a , $x , $x ) ( $ts + 24a , $x , $x ) ( $ts + 26a , $x , $x ) ( $ts + 28a , $x , $x ) ( $ts + 30a , $x , $x ) ( $ts + 32a , $x , $x ) ( $ts + 34a , $x , $x ) ( $ts + 36a , $x , $x ) ( $ts + 38a , $x , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb -x continue_loop
+    print data00 $data00 totalRows $totalRows
+    if $data00 != $totalRows then
+	    print **********************  select error **********************
+    endi
+    continue_loop:
+    print ====================== client4  insert data complete once ............
+  endi
+endw 
+
+
+##################### alter tag
+sql alter table $stb add tag t3 int
+sql alter table $stb drop tag t2
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = ttb . $i
+  sql create table if not exists  $tb using $stb tags ($i, $i)
+  $i = $i + 1
+endw 
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x , $x ) ( $ts + 2a , $x , $x ) ( $ts + 4a , $x , $x ) ( $ts + 6a , $x , $x ) ( $ts + 8a , $x , $x ) ( $ts + 10a , $x , $x ) ( $ts + 12a , $x , $x ) ( $ts + 14a , $x , $x ) ( $ts + 16a , $x , $x ) ( $ts + 18a , $x , $x ) ( $ts + 20a , $x , $x ) ( $ts + 22a , $x , $x ) ( $ts + 24a , $x , $x ) ( $ts + 26a , $x , $x ) ( $ts + 28a , $x , $x ) ( $ts + 30a , $x , $x ) ( $ts + 32a , $x , $x ) ( $ts + 34a , $x , $x ) ( $ts + 36a , $x , $x ) ( $ts + 38a , $x , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb -x continue_loop
+    print data00 $data00 totalRows $totalRows
+    if $data00 != $totalRows then
+	    print **********************  select error **********************
+    endi
+    continue_loop:
+    print ====================== client4  insert data complete once ............
+  endi
+endw 
+
+goto loop_lable
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client1_0.sim b/tests/script/unique/cluster/main2_client1_0.sim
new file mode 100644
index 0000000000..a7fd181363
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client1_0.sim
@@ -0,0 +1,69 @@
+#system sh/stop_dnodes.sh
+#system sh/deploy.sh -n dnode1 -i 1
+#system sh/cfg.sh -n dnode5 -c maxtablesPerVnode -v 10000
+#system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 256
+#system sh/exec.sh -n dnode1 -s start
+#sql connect
+#$db = db1
+#sql create database $db
+#sql use $db
+#$stb = stb1
+#sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+
+
+$tblStart = 0
+$tblEnd = 1000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_0
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_0 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client1_0  insert data complete once ............
+  endi
+endw 
+print ====================== client1_0  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client1_1.sim b/tests/script/unique/cluster/main2_client1_1.sim
new file mode 100644
index 0000000000..f22d62a741
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client1_1.sim
@@ -0,0 +1,57 @@
+$tblStart = 1000
+$tblEnd = 2000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_1
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_1 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client1_1  insert data complete once ............
+  endi
+endw 
+print ====================== client1_1  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client1_2.sim b/tests/script/unique/cluster/main2_client1_2.sim
new file mode 100644
index 0000000000..df3a925c59
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client1_2.sim
@@ -0,0 +1,56 @@
+$tblStart = 2000
+$tblEnd = 3000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_2
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_2 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client1_2  insert data complete once ............
+  endi
+endw 
+print ====================== client1_2  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client1_3.sim b/tests/script/unique/cluster/main2_client1_3.sim
new file mode 100644
index 0000000000..9c22432fa5
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client1_3.sim
@@ -0,0 +1,56 @@
+$tblStart = 3000
+$tblEnd = 4000
+$tsStart = 1325347200000  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client1_3
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client1_3 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client1_3  insert data complete once ............
+  endi
+endw 
+print ====================== client1_3  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client2_0.sim b/tests/script/unique/cluster/main2_client2_0.sim
new file mode 100644
index 0000000000..e44efc49fc
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client2_0.sim
@@ -0,0 +1,56 @@
+$tblStart = 0
+$tblEnd = 1000
+$tsStart = 1325347200001  # 2012-01-01 00:00:00.001
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client2_0
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client2_0 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lastLossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client2_0  insert data complete once ............
+  endi
+endw 
+print ====================== client2_0  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client2_1.sim b/tests/script/unique/cluster/main2_client2_1.sim
new file mode 100644
index 0000000000..19de147d3e
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client2_1.sim
@@ -0,0 +1,57 @@
+$tblStart = 1000
+$tblEnd = 2000
+$tsStart = 1325347200001  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client2_1
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client2_1 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client2_1  insert data complete once ............
+  endi
+endw 
+print ====================== client2_1  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client2_2.sim b/tests/script/unique/cluster/main2_client2_2.sim
new file mode 100644
index 0000000000..19e3540bd1
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client2_2.sim
@@ -0,0 +1,57 @@
+$tblStart = 2000
+$tblEnd = 3000
+$tsStart = 1325347200001  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client2_2
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client2_2 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client2_2  insert data complete once ............
+  endi
+endw 
+print ====================== client2_2  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/cluster/main2_client2_3.sim b/tests/script/unique/cluster/main2_client2_3.sim
new file mode 100644
index 0000000000..219df131c8
--- /dev/null
+++ b/tests/script/unique/cluster/main2_client2_3.sim
@@ -0,0 +1,57 @@
+$tblStart = 3000
+$tblEnd = 4000
+$tsStart = 1325347200001  # 2012-01-01 00:00:00.000
+###############################################################
+
+sql connect
+
+$db = db1
+$stb = stb1
+
+sql use $db
+
+
+######sql create table $stb (ts timestamp, c1 int) tags(t1 int, t2 binary(8))
+$tagBinary = ' . client2_3
+$tagBinary = $tagBinary . '
+#print ======= tag: $tagBinary
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+#  print create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  sql create table if not exists $tb using $stb tags ( $i , $tagBinary )
+  $i = $i + 1
+endw 
+
+print ====================== client2_3 create table end, start insert data ............
+sql select count(tbname) from $stb
+print select count(tbname) from $stb
+print data00 $data00
+
+$rowsPerLoop = 100
+$ts = $tsStart
+
+$lossRows = 0
+
+$i = $tblStart
+while $i < $tblEnd
+  $tb = tb . $i
+  $x = 0
+  while $x < $rowsPerLoop
+    sql insert into $tb values ( $ts + 0a , $x ) ( $ts + 2a , $x ) ( $ts + 4a , $x ) ( $ts + 6a , $x ) ( $ts + 8a , $x ) ( $ts + 10a , $x ) ( $ts + 12a , $x ) ( $ts + 14a , $x ) ( $ts + 16a , $x ) ( $ts + 18a , $x ) ( $ts + 20a , $x ) ( $ts + 22a , $x ) ( $ts + 24a , $x ) ( $ts + 26a , $x ) ( $ts + 28a , $x ) ( $ts + 30a , $x ) ( $ts + 32a , $x ) ( $ts + 34a , $x ) ( $ts + 36a , $x ) ( $ts + 38a , $x )
+    $x = $x + 20
+    $ts = $ts + 40a
+  endw 
+
+  $totalRows = $totalRows + $x
+  $i = $i + 1
+  
+  if $i == $tblEnd then
+    $i = $tblStart
+    
+    sql select count(*) from $stb where t2 == $tagBinary
+    print ====================== client2_3  insert data complete once ............
+  endi
+endw 
+print ====================== client2_3  success and auto end =====================
\ No newline at end of file
diff --git a/tests/script/unique/db/delete.sim b/tests/script/unique/db/delete.sim
index 819da67c8a..f05d64e635 100644
--- a/tests/script/unique/db/delete.sim
+++ b/tests/script/unique/db/delete.sim
@@ -12,6 +12,12 @@ system sh/cfg.sh -n dnode3 -c numOfMnodes -v 3
 system sh/cfg.sh -n dnode1 -c numOfTotalVnodes -v 10
 system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 10
 system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 10
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 2
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 2
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 2
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 1000
+system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 1000
 
 print ========= start dnodes
 system sh/exec.sh -n dnode1 -s start
@@ -23,7 +29,7 @@ sql create dnode $hostname3
 system sh/exec.sh -n dnode3 -s start
 
 print ======== step1 
-sql create database db replica 3 blocks 2 maxtables 1000
+sql create database db replica 3 blocks 2
 sql create table db.mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
 $tbPrefix = db.t
diff --git a/tests/script/unique/db/delete_part.sim b/tests/script/unique/db/delete_part.sim
index ac84382be4..bf74e04b7f 100644
--- a/tests/script/unique/db/delete_part.sim
+++ b/tests/script/unique/db/delete_part.sim
@@ -24,10 +24,15 @@ system sh/cfg.sh -n dnode2 -c numOfTotalVnodes -v 4
 system sh/cfg.sh -n dnode3 -c numOfTotalVnodes -v 4
 system sh/cfg.sh -n dnode4 -c numOfTotalVnodes -v 4
 
-system sh/cfg.sh -n dnode1 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode2 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode3 -c maxtablesPerVnode -v 4
-system sh/cfg.sh -n dnode4 -c maxtablesPerVnode -v 4
+system sh/cfg.sh -n dnode1 -c maxVgroupsPerDb -v 8
+system sh/cfg.sh -n dnode2 -c maxVgroupsPerDb -v 8
+system sh/cfg.sh -n dnode3 -c maxVgroupsPerDb -v 8
+system sh/cfg.sh -n dnode4 -c maxVgroupsPerDb -v 8
+
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 4
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 4
+system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 4
+system sh/cfg.sh -n dnode4 -c maxTablesPerVnode -v 4
 
 print ========= start dnodes
 system sh/exec.sh -n dnode1 -s start
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim
index e0b5e9b931..9d53c9968e 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim
@@ -199,13 +199,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data4_4
-$d2v3status = $data4_2
-$d2v4status = $data4_3
+$d2v2status = $data6_4
+$d2v3status = $data6_2
+$d2v4status = $data6_3
 
-$d1v2status = $data7_4
-$d1v3status = $data7_2
-$d1v4status = $data7_3
+$d1v2status = $data9_4
+$d1v3status = $data9_2
+$d1v4status = $data9_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim
index ae7fc6af17..af457f4cba 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim
@@ -201,13 +201,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data4_4
-$d2v3status = $data4_2
-$d2v4status = $data4_3
+$d2v2status = $data6_4
+$d2v3status = $data6_2
+$d2v4status = $data6_3
 
-$d1v2status = $data7_4
-$d1v3status = $data7_2
-$d1v4status = $data7_3
+$d1v2status = $data9_4
+$d1v3status = $data9_2
+$d1v4status = $data9_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim
index dc9bc62696..e4ff2c23c8 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim
@@ -166,13 +166,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data4_4
-$d2v3status = $data4_2
-$d2v4status = $data4_3
+$d2v2status = $data6_4
+$d2v3status = $data6_2
+$d2v4status = $data6_3
 
-$d1v2status = $data7_4
-$d1v3status = $data7_2
-$d1v4status = $data7_3
+$d1v2status = $data9_4
+$d1v3status = $data9_2
+$d1v4status = $data9_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim
index b754dc7a49..6736530240 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim
@@ -199,13 +199,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data4_4
-$d2v3status = $data4_2
-$d2v4status = $data4_3
+$d2v2status = $data6_4
+$d2v3status = $data6_2
+$d2v4status = $data6_3
 
-$d1v2status = $data7_4
-$d1v3status = $data7_2
-$d1v4status = $data7_3
+$d1v2status = $data9_4
+$d1v3status = $data9_2
+$d1v4status = $data9_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/vnode/replica2_a_large.sim b/tests/script/unique/vnode/replica2_a_large.sim
new file mode 100644
index 0000000000..801570dd9c
--- /dev/null
+++ b/tests/script/unique/vnode/replica2_a_large.sim
@@ -0,0 +1,103 @@
+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+system sh/cfg.sh -n dnode1 -c wallevel -v 2
+system sh/cfg.sh -n dnode2 -c wallevel -v 2
+system sh/cfg.sh -n dnode3 -c wallevel -v 2
+system sh/cfg.sh -n dnode4 -c wallevel -v 2
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode3 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode4 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode2 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode3 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode4 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode1 -c debugFlag -v 131
+system sh/cfg.sh -n dnode2 -c debugFlag -v 131
+system sh/cfg.sh -n dnode3 -c debugFlag -v 131
+system sh/cfg.sh -n dnode4 -c debugFlag -v 131
+system sh/cfg.sh -n dnode1 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode2 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode3 -c arbitrator -v $arbitrator
+system sh/cfg.sh -n dnode4 -c arbitrator -v $arbitrator
+
+print ============== step0: start tarbitrator
+system sh/exec_tarbitrator.sh -s start
+
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+sql create dnode $hostname2
+sql create dnode $hostname3
+system sh/exec.sh -n dnode2 -s start -t
+system sh/exec.sh -n dnode3 -s start -t
+sleep 3000
+
+print ========= step1
+sql create database db replica 2 
+#sql create table db.tb1 (ts timestamp, i int)
+#sql create table db.tb2 (ts timestamp, i int)
+#sql create table db.tb3 (ts timestamp, i int)
+#sql create table db.tb4 (ts timestamp, i int)
+#sql insert into db.tb1 values(now, 1)
+#sql select count(*) from db.tb1
+
+sql create database db replica 2 
+sql create table db.tb (ts timestamp, i int)
+sql insert into db.tb values(now, 1)
+sql select count(*) from db.tb
+$lastRows = $rows
+
+print ======== step2
+#run_back unique/vnode/back_insert_many.sim
+run_back unique/vnode/back_insert.sim
+sleep 3000
+
+print ======== step3
+
+$x = 0
+loop:
+
+print ======== step4
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+sleep 10000
+system sh/exec.sh -n dnode2 -s start -t
+sleep 10000
+
+print ======== step5
+system sh/exec.sh -n dnode3 -s stop -x SIGINT
+sleep 10000
+system sh/exec.sh -n dnode3 -s start -t
+sleep 10000
+
+print ======== step6
+#sql select count(*) from db.tb1
+#print select count(*) from db.tb1 ==> $data00 $lastRows 
+sql select count(*) from db.tb
+print select count(*) from db.tb ==> $data00 $lastRows 
+if $data00 <= $lastRows then
+  return -1
+endi
+
+print ======== step7
+$lastRows = $data00
+print ======== loop Times $x
+
+if $x < 10 then
+  $x = $x + 1
+  goto loop
+endi
+
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
+system sh/exec.sh -n dnode3 -s stop  -x SIGINT
+system sh/exec.sh -n dnode4 -s stop  -x SIGINT
+system sh/exec.sh -n dnode5 -s stop  -x SIGINT
+system sh/exec.sh -n dnode6 -s stop  -x SIGINT
+system sh/exec.sh -n dnode7 -s stop  -x SIGINT
+system sh/exec.sh -n dnode8 -s stop  -x SIGINT
\ No newline at end of file
diff --git a/tests/test/c/createTablePerformance.c b/tests/test/c/createTablePerformance.c
index 3edffd2a5e..2e334fa9b2 100644
--- a/tests/test/c/createTablePerformance.c
+++ b/tests/test/c/createTablePerformance.c
@@ -15,6 +15,7 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
+#include "taoserror.h"
 #include "taos.h"
 #include "tulog.h"
 #include "ttime.h"
@@ -154,7 +155,7 @@ void *threadFunc(void *param) {
     TAOS_RES *pSql = taos_query(con, qstr);
     code = taos_errno(pSql);
     if (code != 0) {
-      pError("failed to create table %s%d, reason:%s", stableName, t, taos_errstr(con));
+      pError("failed to create table %s%d, reason:%s", stableName, t, tstrerror(code));
     }
     taos_free_result(pSql);
   }
diff --git a/tests/tsim/inc/sim.h b/tests/tsim/inc/sim.h
index ecd481f869..18af21a506 100644
--- a/tests/tsim/inc/sim.h
+++ b/tests/tsim/inc/sim.h
@@ -30,8 +30,8 @@
 #define MAX_FILE_NAME_LEN 256
 #define MAX_ERROR_LEN 1024
 #define MAX_QUERY_VALUE_LEN 40
-#define MAX_QUERY_COL_NUM 10
-#define MAX_QUERY_ROW_NUM 10
+#define MAX_QUERY_COL_NUM 20
+#define MAX_QUERY_ROW_NUM 20
 #define MAX_SYSTEM_RESULT_LEN 2048
 #define MAX_VAR_LEN 100
 #define MAX_VAR_NAME_LEN 32
@@ -53,10 +53,10 @@
 
 #define simFatal(...) { if (simDebugFlag & DEBUG_FATAL) { taosPrintLog("SIM FATAL ", 255, __VA_ARGS__); }}
 #define simError(...) { if (simDebugFlag & DEBUG_ERROR) { taosPrintLog("SIM ERROR ", 255, __VA_ARGS__); }}
-#define simWarn(...)  { if (simDebugFlag & DEBUG_WARN)  { taosPrintLog("SIM WARN  ", 255, __VA_ARGS__); }}
-#define simInfo(...)  { if (simDebugFlag & DEBUG_INFO)  { taosPrintLog("SIM INFO  ", 255, __VA_ARGS__); }}
-#define simDebug(...) { if (simDebugFlag & DEBUG_DEBUG) { taosPrintLog("SIM DEBUG ", simDebugFlag, __VA_ARGS__); }}
-#define simTrace(...) { if (simDebugFlag & DEBUG_TRACE) { taosPrintLog("SIM TRACE ", simDebugFlag, __VA_ARGS__); }}
+#define simWarn(...)  { if (simDebugFlag & DEBUG_WARN)  { taosPrintLog("SIM WARN ", 255, __VA_ARGS__); }}
+#define simInfo(...)  { if (simDebugFlag & DEBUG_INFO)  { taosPrintLog("SIM ", 255, __VA_ARGS__); }}
+#define simDebug(...) { if (simDebugFlag & DEBUG_DEBUG) { taosPrintLog("SIM ", simDebugFlag, __VA_ARGS__); }}
+#define simTrace(...) { if (simDebugFlag & DEBUG_TRACE) { taosPrintLog("SIM ", simDebugFlag, __VA_ARGS__); }}
 
 enum { SIM_SCRIPT_TYPE_MAIN, SIM_SCRIPT_TYPE_BACKGROUND };
 
diff --git a/tests/tsim/src/simExe.c b/tests/tsim/src/simExe.c
index b077547709..7826735c2f 100644
--- a/tests/tsim/src/simExe.c
+++ b/tests/tsim/src/simExe.c
@@ -80,6 +80,23 @@ char *simGetVariable(SScript *script, char *varName, int varLen) {
         }
       }
       return "null";
+    } else if (varName[6] == '_') {
+      int col = (varName[4] - '0') * 10 + (varName[5] - '0');
+      if (col < 0 || col >= MAX_QUERY_COL_NUM) {
+        return "null";
+      }
+
+      char *keyName;
+      int keyLen;
+      paGetToken(varName + 7, &keyName, &keyLen);
+
+      for (int i = 0; i < MAX_QUERY_ROW_NUM; ++i) {
+        if (strncmp(keyName, script->data[i][0], keyLen) == 0) {
+          simTrace("script:%s, keyName:%s, keyValue:%s", script->fileName, script->data[i][0], script->data[i][col]);
+          return script->data[i][col];
+        }
+      }
+      return "null";
     } else {
       int row = varName[4] - '0';
       int col = varName[5] - '0';