diff --git a/.gitignore b/.gitignore
index d0af51d31b..83df761654 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,5 +33,8 @@ Target/
 *.failed
 *.sql
 sim/
+psim/
+pysim/
+*.out
 *DS_Store
 
diff --git a/.travis.yml b/.travis.yml
index da0c47ea56..9bc576dcf9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,7 +50,7 @@ matrix:
           ./test-all.sh $TRAVIS_EVENT_TYPE || travis_terminate $?
 
           cd ${TRAVIS_BUILD_DIR}/tests/pytest
-          ./valgrind-test.sh -g 2>&1 > mem-error-out.txt
+          ./valgrind-test.sh 2>&1 > mem-error-out.txt
           sleep 1
 
           # Color setting
diff --git a/src/client/inc/tscUtil.h b/src/client/inc/tscUtil.h
index 1654f76f1c..dbbec01329 100644
--- a/src/client/inc/tscUtil.h
+++ b/src/client/inc/tscUtil.h
@@ -43,7 +43,7 @@ extern "C" {
 
 typedef struct SParsedColElem {
   int16_t colIndex;
-  int16_t offset;
+  uint16_t offset;
 } SParsedColElem;
 
 typedef struct SParsedDataColInfo {
diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index a7eec31388..e6a37a2745 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -49,7 +49,7 @@ typedef struct STableComInfo {
   uint8_t numOfTags;
   uint8_t precision;
   int16_t numOfColumns;
-  int16_t rowSize;
+  int32_t rowSize;
 } STableComInfo;
 
 typedef struct STableMeta {
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index bc717ed88c..110377d112 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -235,7 +235,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet) {
   SSqlRes *pRes = &pSql->res;
   SSqlCmd *pCmd = &pSql->cmd;
   STscObj *pObj = pSql->pTscObj;
-  tscTrace("%p msg:%p is received from server", pSql, rpcMsg->pCont);
+  tscTrace("%p msg:%s is received from server", pSql, taosMsg[rpcMsg->msgType]);
 
   if (pSql->freed || pObj->signature != pObj) {
     tscTrace("%p sql is already released or DB connection is closed, freed:%d pObj:%p signature:%p", pSql, pSql->freed,
diff --git a/src/dnode/inc/dnodeMain.h b/src/dnode/inc/dnodeMain.h
new file mode 100644
index 0000000000..df7698ffc3
--- /dev/null
+++ b/src/dnode/inc/dnodeMain.h
@@ -0,0 +1,30 @@
+/*
+ * 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 TDENGINE_DNODE_MAIN_H
+#define TDENGINE_DNODE_MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int32_t dnodeInitSystem();
+void dnodeCleanUpSystem();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 7949a62966..2f693c61fb 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -16,8 +16,6 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 #include "taos.h"
-#include "tglobal.h"
-#include "trpc.h"
 #include "tutil.h"
 #include "tconfig.h"
 #include "tglobal.h"
@@ -29,112 +27,14 @@
 #include "dnodeVRead.h"
 #include "dnodeShell.h"
 #include "dnodeVWrite.h"
-#include "tgrant.h"
 
-static int32_t dnodeInitSystem();
 static int32_t dnodeInitStorage();
-extern void grantParseParameter();
 static void dnodeCleanupStorage();
-static void dnodeCleanUpSystem();
 static void dnodeSetRunStatus(SDnodeRunStatus status);
-static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context);
 static void dnodeCheckDataDirOpenned(char *dir);
 static SDnodeRunStatus tsDnodeRunStatus = TSDB_DNODE_RUN_STATUS_STOPPED;
 
-int32_t main(int32_t argc, char *argv[]) {
-  // Set global configuration file
-  for (int32_t i = 1; i < argc; ++i) {
-    if (strcmp(argv[i], "-c") == 0) {
-      if (i < argc - 1) {
-        strcpy(configDir, argv[++i]);
-      } else {
-        printf("'-c' requires a parameter, default:%s\n", configDir);
-        exit(EXIT_FAILURE);
-      }
-    } else if (strcmp(argv[i], "-V") == 0) {
-#ifdef _SYNC      
-      char *versionStr = "enterprise";
-#else      
-      char *versionStr = "community";
-#endif      
-      printf("%s version: %s compatible_version: %s\n", versionStr, version, compatible_version);
-      printf("gitinfo: %s\n", gitinfo);
-      printf("gitinfoI: %s\n", gitinfoOfInternal);
-      printf("buildinfo: %s\n", buildinfo);
-      exit(EXIT_SUCCESS);
-    } else if (strcmp(argv[i], "-k") == 0) {
-      grantParseParameter();
-      exit(EXIT_SUCCESS);
-    }
-#ifdef TAOS_MEM_CHECK
-    else if (strcmp(argv[i], "--alloc-random-fail") == 0) {
-      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
-        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, argv[++i], true);
-      } else {
-        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, NULL, true);
-      }
-    } else if (strcmp(argv[i], "--detect-mem-leak") == 0) {
-      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
-        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, argv[++i], true);
-      } else {
-        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, NULL, true);
-      }
-    }
-#endif
-  }
-
-  /* Set termination handler. */
-  struct sigaction act = {{0}};
-  act.sa_flags = SA_SIGINFO;
-  act.sa_sigaction = signal_handler;
-  sigaction(SIGTERM, &act, NULL);
-  sigaction(SIGHUP, &act, NULL);
-  sigaction(SIGINT, &act, NULL);
-  sigaction(SIGUSR1, &act, NULL);
-  sigaction(SIGUSR2, &act, NULL);
-
-  // Open /var/log/syslog file to record information.
-  openlog("TDengine:", LOG_PID | LOG_CONS | LOG_NDELAY, LOG_LOCAL1);
-  syslog(LOG_INFO, "Starting TDengine service...");
-
-  // Initialize the system
-  if (dnodeInitSystem() < 0) {
-    syslog(LOG_ERR, "Error initialize TDengine system");
-    closelog();
-
-    dnodeCleanUpSystem();
-    exit(EXIT_FAILURE);
-  }
-
-  syslog(LOG_INFO, "Started TDengine service successfully.");
-
-  while (1) {
-    sleep(1000);
-  }
-}
-
-static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context) {
-  if (signum == SIGUSR1) {
-    taosCfgDynamicOptions("debugFlag 135");
-    return;
-  }
-  if (signum == SIGUSR2) {
-    taosCfgDynamicOptions("resetlog");
-    return;
-  }
-  syslog(LOG_INFO, "Shut down signal is %d", signum);
-  syslog(LOG_INFO, "Shutting down TDengine service...");
-  // clean the system.
-  dPrint("shut down signal is %d, sender PID:%d", signum, sigInfo->si_pid);
-  dnodeCleanUpSystem();
-  // close the syslog
-  syslog(LOG_INFO, "Shut down TDengine service successfully");
-  dPrint("TDengine is shut down!");
-  closelog();
-  exit(EXIT_SUCCESS);
-}
-
-static int32_t dnodeInitSystem() {
+int32_t dnodeInitSystem() {
   dnodeSetRunStatus(TSDB_DNODE_RUN_STATUS_INITIALIZE);
   tscEmbedded  = 1;
   taosResolveCRC();
@@ -180,7 +80,7 @@ static int32_t dnodeInitSystem() {
   return 0;
 }
 
-static void dnodeCleanUpSystem() {
+void dnodeCleanUpSystem() {
   if (dnodeGetRunStatus() != TSDB_DNODE_RUN_STATUS_STOPPED) {
     dnodeSetRunStatus(TSDB_DNODE_RUN_STATUS_STOPPED);
     dnodeCleanupShell();
diff --git a/src/dnode/src/dnodeSystem.c b/src/dnode/src/dnodeSystem.c
new file mode 100644
index 0000000000..683328db29
--- /dev/null
+++ b/src/dnode/src/dnodeSystem.c
@@ -0,0 +1,117 @@
+/*
+ * 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/>.
+ */
+
+#define _DEFAULT_SOURCE
+#include "os.h"
+#include "tgrant.h"
+#include "tutil.h"
+#include "tglobal.h"
+#include "dnodeInt.h"
+#include "dnodeMain.h"
+
+static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context);
+
+int32_t main(int32_t argc, char *argv[]) {
+  // Set global configuration file
+  for (int32_t i = 1; i < argc; ++i) {
+    if (strcmp(argv[i], "-c") == 0) {
+      if (i < argc - 1) {
+        strcpy(configDir, argv[++i]);
+      } else {
+        printf("'-c' requires a parameter, default:%s\n", configDir);
+        exit(EXIT_FAILURE);
+      }
+    } else if (strcmp(argv[i], "-V") == 0) {
+#ifdef _SYNC      
+      char *versionStr = "enterprise";
+#else      
+      char *versionStr = "community";
+#endif      
+      printf("%s version: %s compatible_version: %s\n", versionStr, version, compatible_version);
+      printf("gitinfo: %s\n", gitinfo);
+      printf("gitinfoI: %s\n", gitinfoOfInternal);
+      printf("buildinfo: %s\n", buildinfo);
+      exit(EXIT_SUCCESS);
+    } else if (strcmp(argv[i], "-k") == 0) {
+      grantParseParameter();
+      exit(EXIT_SUCCESS);
+    }
+#ifdef TAOS_MEM_CHECK
+    else if (strcmp(argv[i], "--alloc-random-fail") == 0) {
+      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
+        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, argv[++i], true);
+      } else {
+        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, NULL, true);
+      }
+    } else if (strcmp(argv[i], "--detect-mem-leak") == 0) {
+      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
+        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, argv[++i], true);
+      } else {
+        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, NULL, true);
+      }
+    }
+#endif
+  }
+
+  /* Set termination handler. */
+  struct sigaction act = {{0}};
+  act.sa_flags = SA_SIGINFO;
+  act.sa_sigaction = signal_handler;
+  sigaction(SIGTERM, &act, NULL);
+  sigaction(SIGHUP, &act, NULL);
+  sigaction(SIGINT, &act, NULL);
+  sigaction(SIGUSR1, &act, NULL);
+  sigaction(SIGUSR2, &act, NULL);
+
+  // Open /var/log/syslog file to record information.
+  openlog("TDengine:", LOG_PID | LOG_CONS | LOG_NDELAY, LOG_LOCAL1);
+  syslog(LOG_INFO, "Starting TDengine service...");
+
+  // Initialize the system
+  if (dnodeInitSystem() < 0) {
+    syslog(LOG_ERR, "Error initialize TDengine system");
+    closelog();
+
+    dnodeCleanUpSystem();
+    exit(EXIT_FAILURE);
+  }
+
+  syslog(LOG_INFO, "Started TDengine service successfully.");
+
+  while (1) {
+    sleep(1000);
+  }
+}
+
+static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context) {
+  if (signum == SIGUSR1) {
+    taosCfgDynamicOptions("debugFlag 135");
+    return;
+  }
+  if (signum == SIGUSR2) {
+    taosCfgDynamicOptions("resetlog");
+    return;
+  }
+  syslog(LOG_INFO, "Shut down signal is %d", signum);
+  syslog(LOG_INFO, "Shutting down TDengine service...");
+  // clean the system.
+  dPrint("shut down signal is %d, sender PID:%d", signum, sigInfo->si_pid);
+  dnodeCleanUpSystem();
+  // close the syslog
+  syslog(LOG_INFO, "Shut down TDengine service successfully");
+  dPrint("TDengine is shut down!");
+  closelog();
+  exit(EXIT_SUCCESS);
+}
diff --git a/src/dnode/src/dnodeVRead.c b/src/dnode/src/dnodeVRead.c
index aaf71838bf..aa8cd99785 100644
--- a/src/dnode/src/dnodeVRead.c
+++ b/src/dnode/src/dnodeVRead.c
@@ -92,8 +92,6 @@ void dnodeDispatchToVnodeReadQueue(SRpcMsg *pMsg) {
   char        *pCont       = (char *) pMsg->pCont;
   void        *pVnode;  
 
-  dTrace("dnode %s msg incoming, thandle:%p", taosMsg[pMsg->msgType], pMsg->handle);
-
   while (leftLen > 0) {
     SMsgHead *pHead = (SMsgHead *) pCont;
     pHead->vgId    = htonl(pHead->vgId);
@@ -214,6 +212,7 @@ static void *dnodeProcessReadQueue(void *param) {
       continue;
     }
 
+    dTrace("%p, msg:%s will be processed", pReadMsg->rpcMsg.ahandle, taosMsg[pReadMsg->rpcMsg.msgType]);
     int32_t code = vnodeProcessRead(pVnode, pReadMsg->rpcMsg.msgType, pReadMsg->pCont, pReadMsg->contLen, &pReadMsg->rspRet);
     dnodeSendRpcReadRsp(pVnode, pReadMsg, code);
     taosFreeQitem(pReadMsg);
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index 5de4c16c50..879082f223 100644
--- a/src/dnode/src/dnodeVWrite.c
+++ b/src/dnode/src/dnodeVWrite.c
@@ -200,6 +200,7 @@ static void *dnodeProcessWriteQueue(void *param) {
         pHead->msgType = pWrite->rpcMsg.msgType;
         pHead->version = 0;
         pHead->len = pWrite->contLen;
+        dTrace("%p, msg:%s will be processed", pWrite->rpcMsg.ahandle, taosMsg[pWrite->rpcMsg.msgType]);
       } else {
         pHead = (SWalHead *)item;
       }
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 5dad1bdb53..61e82720b1 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -193,20 +193,20 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_ACCT_LEN             TSDB_UNI_LEN
 #define TSDB_PASSWORD_LEN         TSDB_UNI_LEN
 
-#define TSDB_MAX_COLUMNS          256
+#define TSDB_MAX_COLUMNS          1024
 #define TSDB_MIN_COLUMNS          2       //PRIMARY COLUMN(timestamp) + other columns
 
 #define TSDB_NODE_NAME_LEN        64
 #define TSDB_TABLE_NAME_LEN       192
 #define TSDB_DB_NAME_LEN          32
 #define TSDB_COL_NAME_LEN         64
-#define TSDB_MAX_SAVED_SQL_LEN    TSDB_MAX_COLUMNS * 16
+#define TSDB_MAX_SAVED_SQL_LEN    TSDB_MAX_COLUMNS * 64
 #define TSDB_MAX_SQL_LEN          TSDB_PAYLOAD_SIZE
 #define TSDB_MAX_ALLOWED_SQL_LEN  (8*1024*1024U)          // sql length should be less than 6mb
 
-#define TSDB_MAX_BYTES_PER_ROW    TSDB_MAX_COLUMNS * 16
-#define TSDB_MAX_TAGS_LEN         512
-#define TSDB_MAX_TAGS             32
+#define TSDB_MAX_BYTES_PER_ROW    TSDB_MAX_COLUMNS * 64
+#define TSDB_MAX_TAGS_LEN         65536
+#define TSDB_MAX_TAGS             128
 
 #define TSDB_AUTH_LEN             16
 #define TSDB_KEY_LEN              16
@@ -236,7 +236,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_PAYLOAD_SIZE         (TSDB_DEFAULT_PKT_SIZE - 100)
 #define TSDB_DEFAULT_PAYLOAD_SIZE 1024   // default payload size
 #define TSDB_EXTRA_PAYLOAD_SIZE   128    // extra bytes for auth
-#define TSDB_SQLCMD_SIZE          1024
+#define TSDB_CQ_SQL_SIZE          1024
 #define TSDB_MAX_VNODES           256
 #define TSDB_MIN_VNODES           50
 #define TSDB_INVALID_VNODE_NUM    0
diff --git a/src/inc/trpc.h b/src/inc/trpc.h
index eff210433f..16223b813a 100644
--- a/src/inc/trpc.h
+++ b/src/inc/trpc.h
@@ -48,6 +48,7 @@ typedef struct {
   int     contLen;
   int32_t code;
   void   *handle;
+  void   *ahandle;  //app handle set by client, for debug purpose
 } SRpcMsg;
 
 typedef struct {
diff --git a/src/mnode/inc/mgmtDef.h b/src/mnode/inc/mgmtDef.h
index f33531583a..7c1fd6c5ab 100644
--- a/src/mnode/inc/mgmtDef.h
+++ b/src/mnode/inc/mgmtDef.h
@@ -68,7 +68,7 @@ typedef struct SMnodeObj {
 
 // todo use dynamic length string
 typedef struct {
-  char   tableId[TSDB_TABLE_ID_LEN + 1];
+  char  *tableId;
   int8_t type;
 } STableObj;
 
@@ -77,6 +77,7 @@ typedef struct SSuperTableObj {
   uint64_t   uid;
   int64_t    createdTime;
   int32_t    sversion;
+  int32_t    tversion;
   int32_t    numOfColumns;
   int32_t    numOfTags;
   int8_t     reserved[15];
diff --git a/src/mnode/inc/mgmtSdb.h b/src/mnode/inc/mgmtSdb.h
index a97b1219a9..975206d52e 100644
--- a/src/mnode/inc/mgmtSdb.h
+++ b/src/mnode/inc/mgmtSdb.h
@@ -35,7 +35,8 @@ typedef enum {
 typedef enum {
   SDB_KEY_STRING, 
   SDB_KEY_INT,
-  SDB_KEY_AUTO
+  SDB_KEY_AUTO,
+  SDB_KEY_VAR_STRING,
 } ESdbKey;
 
 typedef enum {
diff --git a/src/mnode/src/mgmtSdb.c b/src/mnode/src/mgmtSdb.c
index c0d389f305..087c84effd 100644
--- a/src/mnode/src/mgmtSdb.c
+++ b/src/mnode/src/mgmtSdb.c
@@ -104,6 +104,14 @@ bool sdbIsServing() {
   return tsSdbObj.status == SDB_STATUS_SERVING; 
 }
 
+static void *sdbGetObjKey(SSdbTable *pTable, void *key) {
+  if (pTable->keyType == SDB_KEY_VAR_STRING) {
+    return *(char **)key;
+  }
+
+  return key;
+}
+
 static char *sdbGetActionStr(int32_t action) {
   switch (action) {
     case SDB_ACTION_INSERT:
@@ -116,20 +124,25 @@ static char *sdbGetActionStr(int32_t action) {
   return "invalid";
 }
 
-static char *sdbGetkeyStr(SSdbTable *pTable, void *row) {
+static char *sdbGetKeyStr(SSdbTable *pTable, void *key) {
   static char str[16];
   switch (pTable->keyType) {
     case SDB_KEY_STRING:
-      return (char *)row;
+    case SDB_KEY_VAR_STRING:
+      return (char *)key;
     case SDB_KEY_INT:
     case SDB_KEY_AUTO:
-      sprintf(str, "%d", *(int32_t *)row);
+      sprintf(str, "%d", *(int32_t *)key);
       return str;
     default:
       return "invalid";
   }
 }
 
+static char *sdbGetKeyStrFromObj(SSdbTable *pTable, void *key) {
+  return sdbGetKeyStr(pTable, sdbGetObjKey(pTable, key));
+}
+
 static void *sdbGetTableFromId(int32_t tableId) {
   return tsSdbObj.tableList[tableId];
 }
@@ -332,50 +345,48 @@ void sdbCleanUp() {
   pthread_mutex_destroy(&tsSdbObj.mutex);
 }
 
-void sdbIncRef(void *handle, void *pRow) {
-  if (pRow) {
-    SSdbTable *pTable = handle;
-    int32_t *  pRefCount = (int32_t *)(pRow + pTable->refCountPos);
-    atomic_add_fetch_32(pRefCount, 1);
-    if (0 && (pTable->tableId == SDB_TABLE_MNODE || pTable->tableId == SDB_TABLE_DNODE)) {
-      sdbTrace("table:%s, add ref to record:%s:%s:%d", pTable->tableName, pTable->tableName, sdbGetkeyStr(pTable, pRow),
-               *pRefCount);
-    }
+void sdbIncRef(void *handle, void *pObj) {
+  if (pObj == NULL) return;
+
+  SSdbTable *pTable = handle;
+  int32_t *  pRefCount = (int32_t *)(pObj + pTable->refCountPos);
+  atomic_add_fetch_32(pRefCount, 1);
+  if (0 && (pTable->tableId == SDB_TABLE_MNODE || pTable->tableId == SDB_TABLE_DNODE)) {
+    sdbTrace("table:%s, add ref to record:%s:%d", pTable->tableName, sdbGetKeyStrFromObj(pTable, pObj), *pRefCount);
   }
 }
 
-void sdbDecRef(void *handle, void *pRow) {
-  if (pRow) {
-    SSdbTable *pTable = handle;
-    int32_t *  pRefCount = (int32_t *)(pRow + pTable->refCountPos);
-    int32_t    refCount = atomic_sub_fetch_32(pRefCount, 1);
-    if (0 && (pTable->tableId == SDB_TABLE_MNODE || pTable->tableId == SDB_TABLE_DNODE)) {
-      sdbTrace("table:%s, def ref of record:%s:%s:%d", pTable->tableName, pTable->tableName, sdbGetkeyStr(pTable, pRow),
-               *pRefCount);
-    }
-    int8_t *updateEnd = pRow + pTable->refCountPos - 1;
-    if (refCount <= 0 && *updateEnd) {
-      sdbTrace("table:%s, record:%s:%s:%d is destroyed", pTable->tableName, pTable->tableName,
-               sdbGetkeyStr(pTable, pRow), *pRefCount);
-      SSdbOper oper = {.pObj = pRow};
-      (*pTable->destroyFp)(&oper);
-    }
+void sdbDecRef(void *handle, void *pObj) {
+  if (pObj == NULL) return;
+
+  SSdbTable *pTable = handle;
+  int32_t *  pRefCount = (int32_t *)(pObj + pTable->refCountPos);
+  int32_t    refCount = atomic_sub_fetch_32(pRefCount, 1);
+  if (0 && (pTable->tableId == SDB_TABLE_MNODE || pTable->tableId == SDB_TABLE_DNODE)) {
+    sdbTrace("table:%s, def ref of record:%s:%d", pTable->tableName, sdbGetKeyStrFromObj(pTable, pObj), *pRefCount);
+  }
+
+  int8_t *updateEnd = pObj + pTable->refCountPos - 1;
+  if (refCount <= 0 && *updateEnd) {
+    sdbTrace("table:%s, record:%s:%d is destroyed", pTable->tableName, sdbGetKeyStrFromObj(pTable, pObj), *pRefCount);
+    SSdbOper oper = {.pObj = pObj};
+    (*pTable->destroyFp)(&oper);
   }
 }
 
-static SSdbRow *sdbGetRowMeta(void *handle, void *key) {
-  SSdbTable *pTable = (SSdbTable *)handle;
-  SSdbRow * pMeta;
-
-  if (handle == NULL) return NULL;
+static SSdbRow *sdbGetRowMeta(SSdbTable *pTable, void *key) {
+  if (pTable == NULL) return NULL;
 
   int32_t keySize = sizeof(int32_t);
-  if (pTable->keyType == SDB_KEY_STRING) {
+  if (pTable->keyType == SDB_KEY_STRING || pTable->keyType == SDB_KEY_VAR_STRING) {
     keySize = strlen((char *)key);
   }
-  pMeta = taosHashGet(pTable->iHandle, key, keySize);
+  
+  return taosHashGet(pTable->iHandle, key, keySize);
+}
 
-  return pMeta;
+static SSdbRow *sdbGetRowMetaFromObj(SSdbTable *pTable, void *key) {
+  return sdbGetRowMeta(pTable, sdbGetObjKey(pTable, key));
 }
 
 void *sdbGetRow(void *handle, void *key) {
@@ -387,7 +398,7 @@ void *sdbGetRow(void *handle, void *key) {
   pthread_mutex_lock(&pTable->mutex);
 
   int32_t keySize = sizeof(int32_t);
-  if (pTable->keyType == SDB_KEY_STRING) {
+  if (pTable->keyType == SDB_KEY_STRING || pTable->keyType == SDB_KEY_VAR_STRING) {
     keySize = strlen((char *)key);
   }
   pMeta = taosHashGet(pTable->iHandle, key, keySize);
@@ -400,6 +411,10 @@ void *sdbGetRow(void *handle, void *key) {
   return pMeta->row;
 }
 
+static void *sdbGetRowFromObj(SSdbTable *pTable, void *key) {
+  return sdbGetRow(pTable, sdbGetObjKey(pTable, key));
+}
+
 static int32_t sdbInsertHash(SSdbTable *pTable, SSdbOper *pOper) {
   SSdbRow rowMeta;
   rowMeta.rowSize = pOper->rowSize;
@@ -407,11 +422,14 @@ static int32_t sdbInsertHash(SSdbTable *pTable, SSdbOper *pOper) {
 
   pthread_mutex_lock(&pTable->mutex);
 
+  void *  key = sdbGetObjKey(pTable, pOper->pObj);
   int32_t keySize = sizeof(int32_t);
-  if (pTable->keyType == SDB_KEY_STRING) {
-    keySize = strlen((char *)pOper->pObj);
+
+  if (pTable->keyType == SDB_KEY_STRING || pTable->keyType == SDB_KEY_VAR_STRING) {
+    keySize = strlen((char *)key);
   }
-  taosHashPut(pTable->iHandle, pOper->pObj, keySize, &rowMeta, sizeof(SSdbRow));
+
+  taosHashPut(pTable->iHandle, key, keySize, &rowMeta, sizeof(SSdbRow));
 
   sdbIncRef(pTable, pOper->pObj);
   pTable->numOfRows++;
@@ -425,7 +443,7 @@ static int32_t sdbInsertHash(SSdbTable *pTable, SSdbOper *pOper) {
   pthread_mutex_unlock(&pTable->mutex);
 
   sdbTrace("table:%s, insert record:%s to hash, numOfRows:%d version:%" PRIu64, pTable->tableName,
-           sdbGetkeyStr(pTable, pOper->pObj), pTable->numOfRows, sdbGetVersion());
+           sdbGetKeyStrFromObj(pTable, pOper->pObj), pTable->numOfRows, sdbGetVersion());
 
   (*pTable->insertFp)(pOper);
   return TSDB_CODE_SUCCESS;
@@ -436,17 +454,20 @@ static int32_t sdbDeleteHash(SSdbTable *pTable, SSdbOper *pOper) {
   
   pthread_mutex_lock(&pTable->mutex);
 
+  void *  key = sdbGetObjKey(pTable, pOper->pObj);
   int32_t keySize = sizeof(int32_t);
-  if (pTable->keyType == SDB_KEY_STRING) {
-    keySize = strlen((char *)pOper->pObj);
+
+  if (pTable->keyType == SDB_KEY_STRING || pTable->keyType == SDB_KEY_VAR_STRING) {
+    keySize = strlen((char *)key);
   }
-  taosHashRemove(pTable->iHandle, pOper->pObj, keySize);
+
+  taosHashRemove(pTable->iHandle, key, keySize);
 
   pTable->numOfRows--;
   pthread_mutex_unlock(&pTable->mutex);
 
   sdbTrace("table:%s, delete record:%s from hash, numOfRows:%d version:%" PRIu64, pTable->tableName,
-           sdbGetkeyStr(pTable, pOper->pObj), pTable->numOfRows, sdbGetVersion());
+           sdbGetKeyStrFromObj(pTable, pOper->pObj), pTable->numOfRows, sdbGetVersion());
 
   int8_t *updateEnd = pOper->pObj + pTable->refCountPos - 1;
   *updateEnd = 1;
@@ -457,7 +478,7 @@ static int32_t sdbDeleteHash(SSdbTable *pTable, SSdbOper *pOper) {
 
 static int32_t sdbUpdateHash(SSdbTable *pTable, SSdbOper *pOper) {
   sdbTrace("table:%s, update record:%s in hash, numOfRows:%d version:%" PRIu64, pTable->tableName,
-           sdbGetkeyStr(pTable, pOper->pObj), pTable->numOfRows, sdbGetVersion());
+           sdbGetKeyStrFromObj(pTable, pOper->pObj), pTable->numOfRows, sdbGetVersion());
 
   (*pTable->updateFp)(pOper);
   return TSDB_CODE_SUCCESS;
@@ -488,7 +509,7 @@ static int sdbWrite(void *param, void *data, int type) {
     } else if (pHead->version != tsSdbObj.version + 1) {
       pthread_mutex_unlock(&tsSdbObj.mutex);
       sdbError("table:%s, failed to restore %s record:%s from wal, version:%" PRId64 " too large, sdb version:%" PRId64,
-               pTable->tableName, sdbGetActionStr(action), sdbGetkeyStr(pTable, pHead->cont), pHead->version,
+               pTable->tableName, sdbGetActionStr(action), sdbGetKeyStr(pTable, pHead->cont), pHead->version,
                tsSdbObj.version);
       return TSDB_CODE_OTHERS;
     } else {
@@ -540,8 +561,8 @@ int32_t sdbInsertRow(SSdbOper *pOper) {
   SSdbTable *pTable = (SSdbTable *)pOper->table;
   if (pTable == NULL) return -1;
 
-  if (sdbGetRow(pTable, pOper->pObj)) {
-    sdbError("table:%s, failed to insert record:%s, already exist", pTable->tableName, sdbGetkeyStr(pTable, pOper->pObj));
+  if (sdbGetRowFromObj(pTable, pOper->pObj)) {
+    sdbError("table:%s, failed to insert record:%s, already exist", pTable->tableName, sdbGetKeyStrFromObj(pTable, pOper->pObj));
     sdbDecRef(pTable, pOper->pObj);
     return TSDB_CODE_ALREADY_THERE;
   }
@@ -580,7 +601,7 @@ int32_t sdbDeleteRow(SSdbOper *pOper) {
   SSdbTable *pTable = (SSdbTable *)pOper->table;
   if (pTable == NULL) return -1;
 
-  SSdbRow *pMeta = sdbGetRowMeta(pTable, pOper->pObj);
+  SSdbRow *pMeta = sdbGetRowMetaFromObj(pTable, pOper->pObj);
   if (pMeta == NULL) {
     sdbTrace("table:%s, record is not there, delete failed", pTable->tableName);
     return -1;
@@ -590,25 +611,27 @@ int32_t sdbDeleteRow(SSdbOper *pOper) {
   assert(pMetaRow != NULL);
 
   if (pOper->type == SDB_OPER_GLOBAL) {
-    int32_t rowSize = 0;
+    void *  key = sdbGetObjKey(pTable, pOper->pObj);
+    int32_t keySize = 0;
     switch (pTable->keyType) {
       case SDB_KEY_STRING:
-        rowSize = strlen((char *)pOper->pObj) + 1;
+      case SDB_KEY_VAR_STRING:
+        keySize = strlen((char *)key) + 1;
         break;
       case SDB_KEY_INT:
       case SDB_KEY_AUTO:
-        rowSize = sizeof(uint64_t);
+        keySize = sizeof(uint32_t);
         break;
       default:
         return -1;
     }
 
-    int32_t   size = sizeof(SWalHead) + rowSize;
+    int32_t   size = sizeof(SWalHead) + keySize;
     SWalHead *pHead = taosAllocateQitem(size);
     pHead->version = 0;
-    pHead->len = rowSize;
+    pHead->len = keySize;
     pHead->msgType = pTable->tableId * 10 + SDB_ACTION_DELETE;
-    memcpy(pHead->cont, pOper->pObj, rowSize);
+    memcpy(pHead->cont, key, keySize);
 
     int32_t code = sdbWrite(pOper, pHead, pHead->msgType);
     taosFreeQitem(pHead);
@@ -622,7 +645,7 @@ int32_t sdbUpdateRow(SSdbOper *pOper) {
   SSdbTable *pTable = (SSdbTable *)pOper->table;
   if (pTable == NULL) return -1;
 
-  SSdbRow *pMeta = sdbGetRowMeta(pTable, pOper->pObj);
+  SSdbRow *pMeta = sdbGetRowMetaFromObj(pTable, pOper->pObj);
   if (pMeta == NULL) {
     sdbTrace("table:%s, record is not there, delete failed", pTable->tableName);
     return -1;
diff --git a/src/mnode/src/mgmtShell.c b/src/mnode/src/mgmtShell.c
index 804572b9ff..d8bcf67242 100644
--- a/src/mnode/src/mgmtShell.c
+++ b/src/mnode/src/mgmtShell.c
@@ -124,6 +124,8 @@ void mgmtDealyedAddToShellQueue(SQueuedMsg *queuedMsg) {
 
 void mgmtProcessMsgFromShell(SRpcMsg *rpcMsg) {
 
+  mTrace("%p, msg:%s will be processed", rpcMsg->ahandle, taosMsg[rpcMsg->msgType]);
+
   if (rpcMsg->pCont == NULL) {
     mgmtSendSimpleResp(rpcMsg->handle, TSDB_CODE_INVALID_MSG_LEN);
     return;
diff --git a/src/mnode/src/mgmtTable.c b/src/mnode/src/mgmtTable.c
index 3e3b16fa9d..637201fdfb 100644
--- a/src/mnode/src/mgmtTable.c
+++ b/src/mnode/src/mgmtTable.c
@@ -84,6 +84,7 @@ static void mgmtProcessAlterTableRsp(SRpcMsg *rpcMsg);
 static int32_t mgmtFindSuperTableColumnIndex(SSuperTableObj *pStable, char *colName);
 
 static void mgmtDestroyChildTable(SChildTableObj *pTable) {
+  tfree(pTable->info.tableId);
   tfree(pTable->schema);
   tfree(pTable->sql);
   tfree(pTable);
@@ -180,6 +181,7 @@ static int32_t mgmtChildTableActionUpdate(SSdbOper *pOper) {
   SChildTableObj *pNew = pOper->pObj;
   SChildTableObj *pTable = mgmtGetChildTable(pNew->info.tableId);
   if (pTable != pNew) {
+    void *oldTableId = pTable->info.tableId;
     void *oldSql = pTable->sql;
     void *oldSchema = pTable->schema;
     memcpy(pTable, pNew, pOper->rowSize);
@@ -188,6 +190,7 @@ static int32_t mgmtChildTableActionUpdate(SSdbOper *pOper) {
     free(pNew);
     free(oldSql);
     free(oldSchema);
+    free(oldTableId);
   }
   mgmtDecTableRef(pTable);
 
@@ -195,51 +198,66 @@ static int32_t mgmtChildTableActionUpdate(SSdbOper *pOper) {
 }
 
 static int32_t mgmtChildTableActionEncode(SSdbOper *pOper) {
-  const int32_t maxRowSize = sizeof(SChildTableObj) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16);
   SChildTableObj *pTable = pOper->pObj;
   assert(pTable != NULL && pOper->rowData != NULL);
 
-  if (pTable->info.type == TSDB_CHILD_TABLE) {
-    memcpy(pOper->rowData, pTable, tsChildTableUpdateSize);
-    pOper->rowSize = tsChildTableUpdateSize;
-  } else {
+  int32_t len = strlen(pTable->info.tableId);
+  if (len > TSDB_TABLE_ID_LEN) return TSDB_CODE_INVALID_TABLE_ID;
+
+  memcpy(pOper->rowData, pTable->info.tableId, len);
+  memset(pOper->rowData + len, 0, 1);
+  len++;
+
+  memcpy(pOper->rowData + len, (char*)pTable + sizeof(char *), tsChildTableUpdateSize);
+  len += tsChildTableUpdateSize;
+
+  if (pTable->info.type != TSDB_CHILD_TABLE) {
     int32_t schemaSize = pTable->numOfColumns * sizeof(SSchema);
-    if (maxRowSize < tsChildTableUpdateSize + schemaSize) {
-      return TSDB_CODE_INVALID_MSG_LEN;
+    memcpy(pOper->rowData + len, pTable->schema, schemaSize);
+    len += schemaSize;
+
+    if (pTable->sqlLen != 0) {
+      memcpy(pOper->rowData + len, pTable->sql, pTable->sqlLen);
+      len += pTable->sqlLen;
     }
-    memcpy(pOper->rowData, pTable, tsChildTableUpdateSize);
-    memcpy(pOper->rowData + tsChildTableUpdateSize, pTable->schema, schemaSize);
-    memcpy(pOper->rowData + tsChildTableUpdateSize + schemaSize, pTable->sql, pTable->sqlLen);
-    pOper->rowSize = tsChildTableUpdateSize + schemaSize + pTable->sqlLen;
   }
 
+  pOper->rowSize = len;
+
   return TSDB_CODE_SUCCESS;
 }
 
 static int32_t mgmtChildTableActionDecode(SSdbOper *pOper) {
   assert(pOper->rowData != NULL);
   SChildTableObj *pTable = calloc(1, sizeof(SChildTableObj));
-  if (pTable == NULL) {
-    return TSDB_CODE_SERV_OUT_OF_MEMORY;
-  }
+  if (pTable == NULL) return TSDB_CODE_SERV_OUT_OF_MEMORY;
 
-  memcpy(pTable, pOper->rowData, tsChildTableUpdateSize);
+  int32_t len = strlen(pOper->rowData);
+  if (len > TSDB_TABLE_ID_LEN) return TSDB_CODE_INVALID_TABLE_ID;
+  pTable->info.tableId = strdup(pOper->rowData);
+  len++;
+
+  memcpy((char*)pTable + sizeof(char *), pOper->rowData + len, tsChildTableUpdateSize);
+  len += tsChildTableUpdateSize;
 
   if (pTable->info.type != TSDB_CHILD_TABLE) {
     int32_t schemaSize = pTable->numOfColumns * sizeof(SSchema);
     pTable->schema = (SSchema *)malloc(schemaSize);
     if (pTable->schema == NULL) {
       mgmtDestroyChildTable(pTable);
-      return TSDB_CODE_SERV_OUT_OF_MEMORY;
+      return TSDB_CODE_INVALID_TABLE_TYPE;
     }
-    memcpy(pTable->schema, pOper->rowData + tsChildTableUpdateSize, schemaSize);
+    memcpy(pTable->schema, pOper->rowData + len, schemaSize);
+    len += schemaSize;
 
-    pTable->sql = (char *)malloc(pTable->sqlLen);
-    if (pTable->sql == NULL) {
-      mgmtDestroyChildTable(pTable);
-      return TSDB_CODE_SERV_OUT_OF_MEMORY;
+    if (pTable->sqlLen != 0) {
+      pTable->sql = malloc(pTable->sqlLen);
+      if (pTable->sql == NULL) {
+        mgmtDestroyChildTable(pTable);
+        return TSDB_CODE_SERV_OUT_OF_MEMORY;
+      }
+      memcpy(pTable->sql, pOper->rowData + len, pTable->sqlLen);
     }
-    memcpy(pTable->sql, pOper->rowData + tsChildTableUpdateSize + schemaSize, pTable->sqlLen);
   }
 
   pOper->pObj = pTable;
@@ -311,15 +329,15 @@ static int32_t mgmtChildTableActionRestored() {
 
 static int32_t mgmtInitChildTables() {
   SChildTableObj tObj;
-  tsChildTableUpdateSize = (int8_t *)tObj.updateEnd - (int8_t *)&tObj;
+  tsChildTableUpdateSize = (int8_t *)tObj.updateEnd - (int8_t *)&tObj.info.type;
 
   SSdbTableDesc tableDesc = {
     .tableId      = SDB_TABLE_CTABLE,
     .tableName    = "ctables",
     .hashSessions = tsMaxTables,
-    .maxRowSize   = sizeof(SChildTableObj) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16),
+    .maxRowSize   = sizeof(SChildTableObj) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16) + TSDB_TABLE_ID_LEN + TSDB_CQ_SQL_SIZE,
     .refCountPos  = (int8_t *)(&tObj.refCount) - (int8_t *)&tObj,
-    .keyType      = SDB_KEY_STRING,
+    .keyType      = SDB_KEY_VAR_STRING,
     .insertFp     = mgmtChildTableActionInsert,
     .deleteFp     = mgmtChildTableActionDelete,
     .updateFp     = mgmtChildTableActionUpdate,
@@ -372,6 +390,7 @@ static void mgmtDestroySuperTable(SSuperTableObj *pStable) {
     taosHashCleanup(pStable->vgHash);
     pStable->vgHash = NULL;
   }
+  tfree(pStable->info.tableId);
   tfree(pStable->schema);
   tfree(pStable);
 }
@@ -408,11 +427,13 @@ static int32_t mgmtSuperTableActionUpdate(SSdbOper *pOper) {
   SSuperTableObj *pNew = pOper->pObj;
   SSuperTableObj *pTable = mgmtGetSuperTable(pNew->info.tableId);
   if (pTable != pNew) {
+    void *oldTableId = pTable->info.tableId;
     void *oldSchema = pTable->schema;
     memcpy(pTable, pNew, pOper->rowSize);
     pTable->schema = pNew->schema;
     free(pNew->vgHash);
     free(pNew);
+    free(oldTableId);
     free(oldSchema);
   }
   mgmtDecTableRef(pTable);
@@ -420,40 +441,50 @@ static int32_t mgmtSuperTableActionUpdate(SSdbOper *pOper) {
 }
 
 static int32_t mgmtSuperTableActionEncode(SSdbOper *pOper) {
-  const int32_t maxRowSize = sizeof(SChildTableObj) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16);
-
   SSuperTableObj *pStable = pOper->pObj;
   assert(pOper->pObj != NULL && pOper->rowData != NULL);
 
+  int32_t len = strlen(pStable->info.tableId);
+  if (len > TSDB_TABLE_ID_LEN) len = TSDB_CODE_INVALID_TABLE_ID;
+
+  memcpy(pOper->rowData, pStable->info.tableId, len);
+  memset(pOper->rowData + len, 0, 1);
+  len++;
+
+  memcpy(pOper->rowData + len, (char*)pStable + sizeof(char *), tsSuperTableUpdateSize);
+  len += tsSuperTableUpdateSize;
+
   int32_t schemaSize = sizeof(SSchema) * (pStable->numOfColumns + pStable->numOfTags);
+  memcpy(pOper->rowData + len, pStable->schema, schemaSize);
+  len += schemaSize;
 
-  if (maxRowSize < tsSuperTableUpdateSize + schemaSize) {
-    return TSDB_CODE_INVALID_MSG_LEN;
-  }
-
-  memcpy(pOper->rowData, pStable, tsSuperTableUpdateSize);
-  memcpy(pOper->rowData + tsSuperTableUpdateSize, pStable->schema, schemaSize);
-  pOper->rowSize = tsSuperTableUpdateSize + schemaSize;
+  pOper->rowSize = len;
 
   return TSDB_CODE_SUCCESS;
 }
 
 static int32_t mgmtSuperTableActionDecode(SSdbOper *pOper) {
   assert(pOper->rowData != NULL);
-
   SSuperTableObj *pStable = (SSuperTableObj *) calloc(1, sizeof(SSuperTableObj));
   if (pStable == NULL) return TSDB_CODE_SERV_OUT_OF_MEMORY;
 
-  memcpy(pStable, pOper->rowData, tsSuperTableUpdateSize);
+  int32_t len = strlen(pOper->rowData);
+  if (len > TSDB_TABLE_ID_LEN) return TSDB_CODE_INVALID_TABLE_ID;
+  pStable->info.tableId = strdup(pOper->rowData);
+  len++;
+
+  memcpy((char*)pStable + sizeof(char *), pOper->rowData + len, tsSuperTableUpdateSize);
+  len += tsSuperTableUpdateSize;
 
   int32_t schemaSize = sizeof(SSchema) * (pStable->numOfColumns + pStable->numOfTags);
   pStable->schema = malloc(schemaSize);
   if (pStable->schema == NULL) {
     mgmtDestroySuperTable(pStable);
-    return -1;
+    return TSDB_CODE_NOT_SUPER_TABLE;
   }
 
-  memcpy(pStable->schema, pOper->rowData + tsSuperTableUpdateSize, schemaSize);
+  memcpy(pStable->schema, pOper->rowData + len, schemaSize);
+  
   pOper->pObj = pStable;
 
   return TSDB_CODE_SUCCESS;
@@ -465,15 +496,15 @@ static int32_t mgmtSuperTableActionRestored() {
 
 static int32_t mgmtInitSuperTables() {
   SSuperTableObj tObj;
-  tsSuperTableUpdateSize = (int8_t *)tObj.updateEnd - (int8_t *)&tObj;
+  tsSuperTableUpdateSize = (int8_t *)tObj.updateEnd - (int8_t *)&tObj.info.type;
 
   SSdbTableDesc tableDesc = {
     .tableId      = SDB_TABLE_STABLE,
     .tableName    = "stables",
     .hashSessions = TSDB_MAX_SUPER_TABLES,
-    .maxRowSize   = tsSuperTableUpdateSize + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16),
+    .maxRowSize   = sizeof(SSuperTableObj) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16) + TSDB_TABLE_ID_LEN,
     .refCountPos  = (int8_t *)(&tObj.refCount) - (int8_t *)&tObj,
-    .keyType      = SDB_KEY_STRING,
+    .keyType      = SDB_KEY_VAR_STRING,
     .insertFp     = mgmtSuperTableActionInsert,
     .deleteFp     = mgmtSuperTableActionDelete,
     .updateFp     = mgmtSuperTableActionUpdate,
@@ -720,18 +751,19 @@ static void mgmtProcessTableMetaMsg(SQueuedMsg *pMsg) {
 
 static void mgmtProcessCreateSuperTableMsg(SQueuedMsg *pMsg) {
   SCMCreateTableMsg *pCreate = pMsg->pCont;
-  SSuperTableObj *pStable = (SSuperTableObj *)calloc(1, sizeof(SSuperTableObj));
+  SSuperTableObj *pStable = calloc(1, sizeof(SSuperTableObj));
   if (pStable == NULL) {
     mError("table:%s, failed to create, no enough memory", pCreate->tableId);
     mgmtSendSimpleResp(pMsg->thandle, TSDB_CODE_SERV_OUT_OF_MEMORY);
     return;
   }
 
-  strcpy(pStable->info.tableId, pCreate->tableId);
+  pStable->info.tableId = strdup(pCreate->tableId);
   pStable->info.type    = TSDB_SUPER_TABLE;
   pStable->createdTime  = taosGetTimestampMs();
   pStable->uid          = (((uint64_t) pStable->createdTime) << 16) + (sdbGetVersion() & ((1ul << 16) - 1ul));
   pStable->sversion     = 0;
+  pStable->tversion     = 0;
   pStable->numOfColumns = htons(pCreate->numOfColumns);
   pStable->numOfTags    = htons(pCreate->numOfTags);
 
@@ -851,7 +883,7 @@ static int32_t mgmtAddSuperTableTag(SSuperTableObj *pStable, SSchema schema[], i
   }
 
   pStable->numOfTags += ntags;
-  pStable->sversion++;
+  pStable->tversion++;
 
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
@@ -878,7 +910,7 @@ static int32_t mgmtDropSuperTableTag(SSuperTableObj *pStable, char *tagName) {
   memmove(pStable->schema + pStable->numOfColumns + col, pStable->schema + pStable->numOfColumns + col + 1,
           sizeof(SSchema) * (pStable->numOfTags - col - 1));
   pStable->numOfTags--;
-  pStable->sversion++;
+  pStable->tversion++;
 
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
@@ -1358,7 +1390,7 @@ static void *mgmtBuildCreateChildTableMsg(SCMCreateTableMsg *pMsg, SChildTableOb
 }
 
 static SChildTableObj* mgmtDoCreateChildTable(SCMCreateTableMsg *pCreate, SVgObj *pVgroup, int32_t tid) {
-  SChildTableObj *pTable = (SChildTableObj *) calloc(1, sizeof(SChildTableObj));
+  SChildTableObj *pTable = calloc(1, sizeof(SChildTableObj));
   if (pTable == NULL) {
     mError("table:%s, failed to alloc memory", pCreate->tableId);
     terrno = TSDB_CODE_SERV_OUT_OF_MEMORY;
@@ -1371,10 +1403,10 @@ static SChildTableObj* mgmtDoCreateChildTable(SCMCreateTableMsg *pCreate, SVgObj
     pTable->info.type = TSDB_NORMAL_TABLE;
   }
 
-  strcpy(pTable->info.tableId, pCreate->tableId);  
-  pTable->createdTime = taosGetTimestampMs();
-  pTable->sid         = tid;
-  pTable->vgId        = pVgroup->vgId;
+  pTable->info.tableId = strdup(pCreate->tableId);  
+  pTable->createdTime  = taosGetTimestampMs();
+  pTable->sid          = tid;
+  pTable->vgId         = pVgroup->vgId;
     
   if (pTable->info.type == TSDB_CHILD_TABLE) {
     char *pTagData = (char *) pCreate->schema;  // it is a tag key
@@ -1655,7 +1687,7 @@ static int32_t mgmtDoGetChildTableMeta(SQueuedMsg *pMsg, STableMetaMsg *pMeta) {
   pMeta->sid       = htonl(pTable->sid);
   pMeta->precision = pDb->cfg.precision;
   pMeta->tableType = pTable->info.type;
-  strncpy(pMeta->tableId, pTable->info.tableId, tListLen(pTable->info.tableId));
+  strncpy(pMeta->tableId, pTable->info.tableId, strlen(pTable->info.tableId));
 
   if (pTable->info.type == TSDB_CHILD_TABLE) {
     pMeta->sversion     = htons(pTable->superTable->sversion);
diff --git a/src/rpc/inc/rpcHead.h b/src/rpc/inc/rpcHead.h
index 8b5410a596..520edadc7d 100644
--- a/src/rpc/inc/rpcHead.h
+++ b/src/rpc/inc/rpcHead.h
@@ -49,6 +49,7 @@ typedef struct {
   char     encrypt:3; // encrypt algorithm, 0: no encryption
   uint16_t tranId;    // transcation ID
   uint32_t linkUid;   // for unique connection ID assigned by client
+  uint64_t ahandle;   // ahandle assigned by client 
   uint32_t sourceId;  // source ID, an index for connection list  
   uint32_t destId;    // destination ID, an index for connection list
   uint32_t destIp;    // destination IP address, for NAT scenario
diff --git a/src/rpc/src/rpcCache.c b/src/rpc/src/rpcCache.c
index edbb9b3e12..7a96571ab9 100644
--- a/src/rpc/src/rpcCache.c
+++ b/src/rpc/src/rpcCache.c
@@ -146,7 +146,7 @@ void rpcAddConnIntoCache(void *handle, void *data, char *fqdn, uint16_t port, in
   rpcUnlockCache(pCache->lockedBy+hash);
 
   pCache->total++;
-  tTrace("%p %s:%hu:%d:%d:%p added into cache, connections:%d", data, fqdn, port, connType, hash, pNode, pCache->count[hash]);
+  // tTrace("%p %s:%hu:%d:%d:%p added into cache, connections:%d", data, fqdn, port, connType, hash, pNode, pCache->count[hash]);
 
   return;
 }
@@ -200,9 +200,9 @@ void *rpcGetConnFromCache(void *handle, char *fqdn, uint16_t port, int8_t connTy
   rpcUnlockCache(pCache->lockedBy+hash);
 
   if (pData) {
-    tTrace("%p %s:%hu:%d:%d:%p retrieved from cache, connections:%d", pData, fqdn, port, connType, hash, pNode, pCache->count[hash]);
+    //tTrace("%p %s:%hu:%d:%d:%p retrieved from cache, connections:%d", pData, fqdn, port, connType, hash, pNode, pCache->count[hash]);
   } else {
-    tTrace("%s:%hu:%d:%d failed to retrieve conn from cache, connections:%d", fqdn, port, connType, hash, pCache->count[hash]);
+    //tTrace("%s:%hu:%d:%d failed to retrieve conn from cache, connections:%d", fqdn, port, connType, hash, pCache->count[hash]);
   }
 
   return pData;
@@ -240,8 +240,8 @@ static void rpcRemoveExpiredNodes(SConnCache *pCache, SConnHash *pNode, int hash
     pNext = pNode->next;
     pCache->total--;
     pCache->count[hash]--;
-    tTrace("%p %s:%hu:%d:%d:%p removed from cache, connections:%d", pNode->data, pNode->fqdn, pNode->port, pNode->connType, hash, pNode,
-             pCache->count[hash]);
+    //tTrace("%p %s:%hu:%d:%d:%p removed from cache, connections:%d", pNode->data, pNode->fqdn, pNode->port, pNode->connType, hash, pNode,
+    //         pCache->count[hash]);
     taosMemPoolFree(pCache->connHashMemPool, (char *)pNode);
     pNode = pNext;
   }
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 7e80f0d282..118f57d89c 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -87,6 +87,7 @@ typedef struct {
 } SRpcReqContext;
 
 typedef struct SRpcConn {
+  char      info[50];// debug info: label + pConn + ahandle
   int       sid;     // session ID
   uint32_t  ownId;   // own link ID
   uint32_t  peerId;  // peer link ID
@@ -275,7 +276,7 @@ void *rpcOpen(const SRpcInit *pInit) {
     return NULL;
   }
 
-  tTrace("%s RPC is openned, numOfThreads:%d", pRpc->label, pRpc->numOfThreads);
+  tTrace("%s rpc is openned, threads:%d sessions:%d", pRpc->label, pRpc->numOfThreads, pInit->sessions);
 
   return pRpc;
 }
@@ -299,7 +300,7 @@ void rpcClose(void *param) {
 
   tfree(pRpc->connList);
   pthread_mutex_destroy(&pRpc->mutex);
-  tTrace("%s RPC is closed", pRpc->label);
+  tTrace("%s rpc is closed", pRpc->label);
   tfree(pRpc);
 }
 
@@ -361,9 +362,10 @@ void rpcSendRequest(void *shandle, const SRpcIpSet *pIpSet, const SRpcMsg *pMsg)
   // connection type is application specific. 
   // for TDengine, all the query, show commands shall have TCP connection
   char type = pMsg->msgType;
-  if (type == TSDB_MSG_TYPE_QUERY || type == TSDB_MSG_TYPE_CM_RETRIEVE || type == TSDB_MSG_TYPE_FETCH ||
-      type == TSDB_MSG_TYPE_CM_STABLE_VGROUP || type == TSDB_MSG_TYPE_CM_TABLES_META ||
-      type == TSDB_MSG_TYPE_CM_SHOW )
+  if (type == TSDB_MSG_TYPE_QUERY || type == TSDB_MSG_TYPE_CM_RETRIEVE
+    || type == TSDB_MSG_TYPE_FETCH || type == TSDB_MSG_TYPE_CM_STABLE_VGROUP
+    || type == TSDB_MSG_TYPE_CM_TABLES_META || type == TSDB_MSG_TYPE_CM_TABLE_META
+    || type == TSDB_MSG_TYPE_CM_SHOW )
     pContext->connType = RPC_CONN_TCPC;
   
   rpcSendReqToServer(pRpc, pContext);
@@ -374,8 +376,6 @@ void rpcSendRequest(void *shandle, const SRpcIpSet *pIpSet, const SRpcMsg *pMsg)
 void rpcSendResponse(const SRpcMsg *pRsp) {
   int        msgLen = 0;
   SRpcConn  *pConn = (SRpcConn *)pRsp->handle;
-  SRpcInfo  *pRpc = pConn->pRpc;
-
   SRpcMsg    rpcMsg = *pRsp;
   SRpcMsg   *pMsg = &rpcMsg;
 
@@ -393,7 +393,7 @@ void rpcSendResponse(const SRpcMsg *pRsp) {
   rpcLockConn(pConn);
 
   if ( pConn->inType == 0 || pConn->user[0] == 0 ) {
-    tTrace("%s %p, connection is already released, rsp wont be sent", pRpc->label, pConn);
+    tTrace("%s, connection is already released, rsp wont be sent", pConn->info);
     rpcUnlockConn(pConn);
     return;
   }
@@ -409,7 +409,8 @@ void rpcSendResponse(const SRpcMsg *pRsp) {
   pHead->linkUid = pConn->linkUid;
   pHead->port = htons(pConn->localPort);
   pHead->code = htonl(pMsg->code);
-
+  pHead->ahandle = (uint64_t) pConn->ahandle;
+ 
   // set pConn parameters
   pConn->inType = 0;
 
@@ -491,6 +492,7 @@ static SRpcConn *rpcOpenConn(SRpcInfo *pRpc, char *peerFqdn, uint16_t peerPort,
   uint32_t peerIp = taosGetIpFromFqdn(peerFqdn);
   if (peerIp == -1) {
     tError("%s, failed to resolve FQDN:%s", pRpc->label, peerFqdn); 
+    terrno = TSDB_CODE_APP_ERROR; 
     return NULL;
   }
 
@@ -506,11 +508,7 @@ static SRpcConn *rpcOpenConn(SRpcInfo *pRpc, char *peerFqdn, uint16_t peerPort,
     if (taosOpenConn[connType]) {
       void *shandle = (connType & RPC_CONN_TCP)? pRpc->tcphandle:pRpc->udphandle;
       pConn->chandle = (*taosOpenConn[connType])(shandle, pConn, pConn->peerIp, pConn->peerPort);
-      if (pConn->chandle) {
-        tTrace("%s %p, rpc connection is set up, sid:%d id:%s %s:%hu connType:%d", pRpc->label, 
-                pConn, pConn->sid, pRpc->user, peerFqdn, pConn->peerPort, pConn->connType);
-      } else {
-        tError("%s %p, failed to set up connection to %s:%hu", pRpc->label, pConn, peerFqdn, pConn->peerPort);
+      if (pConn->chandle == NULL) {
         terrno = TSDB_CODE_NETWORK_UNAVAIL;
         rpcCloseConn(pConn);
         pConn = NULL;
@@ -557,7 +555,7 @@ static void rpcCloseConn(void *thandle) {
   taosFreeId(pRpc->idPool, pConn->sid);
   pConn->pContext = NULL;
 
-  tTrace("%s %p, rpc connection is closed", pRpc->label, pConn);
+  tTrace("%s, rpc connection is closed", pConn->info);
 
   rpcUnlockConn(pConn);
 }
@@ -619,7 +617,6 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
       }
 
       if (terrno != 0) {
-        tWarn("%s %p, user not there or server not ready", pRpc->label, pConn);
         taosFreeId(pRpc->idPool, sid);   // sid shall be released
         pConn = NULL;
       }
@@ -634,8 +631,6 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
     }
   
     taosHashPut(pRpc->hash, hashstr, size, (char *)&pConn, POINTER_BYTES);
-    tTrace("%s %p, rpc connection is allocated, sid:%d id:%s port:%u", 
-           pRpc->label, pConn, sid, pConn->user, pConn->localPort);
   }
 
   return pConn;
@@ -660,7 +655,6 @@ static SRpcConn *rpcGetConnObj(SRpcInfo *pRpc, int sid, SRecvInfo *pRecv) {
 
   if (pConn) {
     if (pConn->linkUid != pHead->linkUid) {
-      tTrace("%s %p, linkUid:0x%x not matched, received:0x%x", pRpc->label, pConn, pConn->linkUid, pHead->linkUid);
       terrno = TSDB_CODE_MISMATCHED_METER_ID;
       pConn = NULL;
     }
@@ -677,21 +671,25 @@ static SRpcConn *rpcSetupConnToServer(SRpcReqContext *pContext) {
   pConn = rpcGetConnFromCache(pRpc->pCache, pIpSet->fqdn[pIpSet->inUse], pIpSet->port[pIpSet->inUse], pContext->connType);
   if ( pConn == NULL || pConn->user[0] == 0) {
     pConn = rpcOpenConn(pRpc, pIpSet->fqdn[pIpSet->inUse], pIpSet->port[pIpSet->inUse], pContext->connType);
+  } 
+
+  if (pConn) {
+    pConn->ahandle = pContext->ahandle;
+    sprintf(pConn->info, "%s %p %p", pRpc->label, pConn, pConn->ahandle);
   } else {
-    tTrace("%s %p, connection is retrieved from cache", pRpc->label, pConn);
+    tError("%s %p, failed to set up connection(%s)", pRpc->label, pContext->ahandle, tstrerror(terrno));
   }
 
   return pConn;
 }
 
 static int rpcProcessReqHead(SRpcConn *pConn, SRpcHead *pHead) {
-    SRpcInfo *pRpc= pConn->pRpc;
 
     if (pConn->peerId == 0) {
       pConn->peerId = pHead->sourceId;
     } else {
       if (pConn->peerId != pHead->sourceId) {
-        tTrace("%s %p, source Id is changed, old:0x%08x new:0x%08x", pRpc->label, pConn, 
+        tTrace("%s, source Id is changed, old:0x%08x new:0x%08x", pConn->info, 
                pConn->peerId, pHead->sourceId);
         return TSDB_CODE_INVALID_VALUE;
       }
@@ -700,17 +698,16 @@ static int rpcProcessReqHead(SRpcConn *pConn, SRpcHead *pHead) {
     if (pConn->inTranId == pHead->tranId) {
       if (pConn->inType == pHead->msgType) {
         if (pHead->code == 0) {
-          tTrace("%s %p, %s is retransmitted", pRpc->label, pConn, taosMsg[pHead->msgType]);
+          tTrace("%s, %s is retransmitted", pConn->info, taosMsg[pHead->msgType]);
           rpcSendQuickRsp(pConn, TSDB_CODE_ACTION_IN_PROGRESS);
         } else {
           // do nothing, it is heart beat from client
         }
       } else if (pConn->inType == 0) {
-        tTrace("%s %p, %s is already processed, tranId:%d", pRpc->label, pConn, 
-                taosMsg[pHead->msgType], pConn->inTranId);
+        tTrace("%s, %s is already processed, tranId:%d", pConn->info, taosMsg[pHead->msgType], pConn->inTranId);
         rpcSendMsgToPeer(pConn, pConn->pRspMsg, pConn->rspMsgLen); // resend the response
       } else {
-        tTrace("%s %p, mismatched message %s and tranId", pRpc->label, pConn, taosMsg[pHead->msgType]);
+        tTrace("%s, mismatched message %s and tranId", pConn->info, taosMsg[pHead->msgType]);
       }
 
       // do not reply any message
@@ -718,7 +715,7 @@ static int rpcProcessReqHead(SRpcConn *pConn, SRpcHead *pHead) {
     }
 
     if (pConn->inType != 0) {
-      tTrace("%s %p, last session is not finished, inTranId:%d tranId:%d", pRpc->label, pConn, 
+      tTrace("%s, last session is not finished, inTranId:%d tranId:%d", pConn->info, 
               pConn->inTranId, pHead->tranId);
       return TSDB_CODE_LAST_SESSION_NOT_FINISHED;
     }
@@ -750,7 +747,7 @@ static int rpcProcessRspHead(SRpcConn *pConn, SRpcHead *pHead) {
 
   if (pHead->code == TSDB_CODE_ACTION_IN_PROGRESS) {
     if (pConn->tretry <= tsRpcMaxRetry) {
-      tTrace("%s %p, peer is still processing the transaction", pRpc->label, pConn);
+      tTrace("%s, peer is still processing the transaction", pConn->info);
       pConn->tretry++;
       rpcSendReqHead(pConn);
       taosTmrReset(rpcProcessRetryTimer, tsRpcTimer, pConn, pRpc->tmrCtrl, &pConn->pTimer);
@@ -789,7 +786,15 @@ static SRpcConn *rpcProcessMsgHead(SRpcInfo *pRpc, SRecvInfo *pRecv) {
   }
 
   pConn = rpcGetConnObj(pRpc, sid, pRecv);
-  if (pConn == NULL) return NULL;
+  if (pConn == NULL) {
+    tError("%s %p, failed to get connection obj(%s)", pRpc->label, pHead->ahandle, tstrerror(terrno)); 
+    return NULL;
+  } else {
+    if (rpcIsReq(pHead->msgType)) {
+      pConn->ahandle = (void *)pHead->ahandle;
+      sprintf(pConn->info, "%s %p %p", pRpc->label, pConn, pConn->ahandle);
+    }
+  }
 
   rpcLockConn(pConn);
   sid = pConn->sid;
@@ -826,7 +831,7 @@ static SRpcConn *rpcProcessMsgHead(SRpcInfo *pRpc, SRecvInfo *pRecv) {
 static void rpcProcessBrokenLink(SRpcConn *pConn) {
   SRpcInfo *pRpc = pConn->pRpc;
   
-  tTrace("%s %p, link is broken", pRpc->label, pConn);
+  tTrace("%s, link is broken", pConn->info);
   // pConn->chandle = NULL;
 
   if (pConn->outType) {
@@ -837,7 +842,7 @@ static void rpcProcessBrokenLink(SRpcConn *pConn) {
 
   if (pConn->inType) {
     // if there are pending request, notify the app
-    tTrace("%s %p, connection is gone, notify the app", pRpc->label, pConn);
+    tTrace("%s, connection is gone, notify the app", pConn->info);
 /*
     SRpcMsg rpcMsg;
     rpcMsg.pCont = NULL;
@@ -872,17 +877,17 @@ static void *rpcProcessMsgFromPeer(SRecvInfo *pRecv) {
   pConn = rpcProcessMsgHead(pRpc, pRecv);
 
   if (pHead->msgType < TSDB_MSG_TYPE_CM_HEARTBEAT || (rpcDebugFlag & 16)) {
-    tTrace("%s %p, %s received from 0x%x:%hu, parse code:0x%x len:%d sig:0x%08x:0x%08x:%d code:0x%x",
-        pRpc->label, pConn, taosMsg[pHead->msgType], pRecv->ip, pRecv->port, terrno, 
+    tTrace("%s %p %p, %s received from 0x%x:%hu, parse code:0x%x len:%d sig:0x%08x:0x%08x:%d code:0x%x",
+        pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType], pRecv->ip, pRecv->port, terrno, 
         pRecv->msgLen, pHead->sourceId, pHead->destId, pHead->tranId, pHead->code);
   }
 
   int32_t code = terrno;
   if (code != TSDB_CODE_ALREADY_PROCESSED) {
     if (code != 0) { // parsing error
-      if ( rpcIsReq(pHead->msgType) ) {
+      if (rpcIsReq(pHead->msgType)) {
         rpcSendErrorMsgToPeer(pRecv, code);
-        tTrace("%s %p, %s is sent with error code:%x", pRpc->label, pConn, taosMsg[pHead->msgType+1], code);
+        tTrace("%s %p %p, %s is sent with error code:%x", pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType+1], code);
       } 
     } else { // parsing OK
       rpcProcessIncomingMsg(pConn, pHead);
@@ -924,6 +929,7 @@ static void rpcProcessIncomingMsg(SRpcConn *pConn, SRpcHead *pHead) {
   rpcMsg.pCont = pHead->content;
   rpcMsg.msgType = pHead->msgType;
   rpcMsg.code = pHead->code; 
+  rpcMsg.ahandle = pConn->ahandle;
    
   if ( rpcIsReq(pHead->msgType) ) {
     rpcMsg.handle = pConn;
@@ -948,14 +954,14 @@ static void rpcProcessIncomingMsg(SRpcConn *pConn, SRpcHead *pHead) {
       pContext->redirect++;
       if (pContext->redirect > TSDB_MAX_REPLICA) {
         pHead->code = TSDB_CODE_NETWORK_UNAVAIL; 
-        tWarn("%s %p, too many redirects, quit", pRpc->label, pConn);
+        tWarn("%s, too many redirects, quit", pConn->info);
       }
     }
 
     if (pHead->code == TSDB_CODE_REDIRECT) {
       pContext->numOfTry = 0;
       memcpy(&pContext->ipSet, pHead->content, sizeof(pContext->ipSet));
-      tTrace("%s %p, redirect is received, numOfIps:%d", pRpc->label, pConn, pContext->ipSet.numOfIps);
+      tTrace("%s, redirect is received, numOfIps:%d", pConn->info, pContext->ipSet.numOfIps);
       for (int i=0; i<pContext->ipSet.numOfIps; ++i) 
         pContext->ipSet.port[i] = htons(pContext->ipSet.port[i]);
       rpcSendReqToServer(pRpc, pContext);
@@ -1061,6 +1067,7 @@ static void rpcSendReqToServer(SRpcInfo *pRpc, SRpcReqContext *pContext) {
     return;
   }
 
+  pConn->ahandle = pContext->ahandle;
   rpcLockConn(pConn);
 
   // set the message header  
@@ -1074,6 +1081,7 @@ static void rpcSendReqToServer(SRpcInfo *pRpc, SRpcReqContext *pContext) {
   pHead->destId = pConn->peerId;
   pHead->port = 0;
   pHead->linkUid = pConn->linkUid;
+  pHead->ahandle = (uint64_t)pConn->ahandle;
   if (!pConn->secured) memcpy(pHead->user, pConn->user, tListLen(pHead->user));
 
   // set the connection parameters
@@ -1091,29 +1099,28 @@ static void rpcSendReqToServer(SRpcInfo *pRpc, SRpcReqContext *pContext) {
 
 static void rpcSendMsgToPeer(SRpcConn *pConn, void *msg, int msgLen) {
   int        writtenLen = 0;
-  SRpcInfo  *pRpc = pConn->pRpc;
   SRpcHead  *pHead = (SRpcHead *)msg;
 
   msgLen = rpcAddAuthPart(pConn, msg, msgLen);
 
   if ( rpcIsReq(pHead->msgType)) {
     if (pHead->msgType < TSDB_MSG_TYPE_CM_HEARTBEAT || (rpcDebugFlag & 16))
-      tTrace("%s %p, %s is sent to %s:%hu, len:%d sig:0x%08x:0x%08x:%d",
-             pRpc->label, pConn, taosMsg[pHead->msgType], pConn->peerFqdn,
-             pConn->peerPort, msgLen, pHead->sourceId, pHead->destId, pHead->tranId);
+      tTrace("%s, %s is sent to %s:%hu, len:%d sig:0x%08x:0x%08x:%d",
+             pConn->info, taosMsg[pHead->msgType], pConn->peerFqdn, pConn->peerPort, 
+             msgLen, pHead->sourceId, pHead->destId, pHead->tranId);
   } else {
     if (pHead->code == 0) pConn->secured = 1; // for success response, set link as secured
     if (pHead->msgType < TSDB_MSG_TYPE_CM_HEARTBEAT || (rpcDebugFlag & 16))
-      tTrace( "%s %p, %s is sent to 0x%x:%hu, code:0x%x len:%d sig:0x%08x:0x%08x:%d",
-          pRpc->label, pConn, taosMsg[pHead->msgType], pConn->peerIp, pConn->peerPort, 
+      tTrace("%s, %s is sent to 0x%x:%hu, code:0x%x len:%d sig:0x%08x:0x%08x:%d",
+          pConn->info, taosMsg[pHead->msgType], pConn->peerIp, pConn->peerPort, 
           htonl(pHead->code), msgLen, pHead->sourceId, pHead->destId, pHead->tranId);
   }
 
+  tTrace("connection type is: %d", pConn->connType);
   writtenLen = (*taosSendData[pConn->connType])(pConn->peerIp, pConn->peerPort, pHead, msgLen, pConn->chandle);
 
   if (writtenLen != msgLen) {
-    tError("%s %p, failed to send, dataLen:%d writtenLen:%d, reason:%s", pRpc->label, pConn, 
-           msgLen, writtenLen, strerror(errno));
+    tError("%s, failed to send, msgLen:%d written:%d, reason:%s", pConn->info, msgLen, writtenLen, strerror(errno));
   }
  
   tDump(msg, msgLen);
@@ -1128,7 +1135,7 @@ static void rpcProcessConnError(void *param, void *id) {
     return;
   }
   
-  tTrace("%s connection error happens", pRpc->label);
+  tTrace("%s %p, connection error happens", pRpc->label, pContext->ahandle);
 
   if (pContext->numOfTry >= pContext->ipSet.numOfIps) {
     rpcMsg.msgType = pContext->msgType+1;
@@ -1154,23 +1161,21 @@ static void rpcProcessRetryTimer(void *param, void *tmrId) {
   rpcLockConn(pConn);
 
   if (pConn->outType && pConn->user[0]) {
-    tTrace("%s %p, expected %s is not received", pRpc->label, pConn, taosMsg[(int)pConn->outType + 1]);
+    tTrace("%s, expected %s is not received", pConn->info, taosMsg[(int)pConn->outType + 1]);
     pConn->pTimer = NULL;
     pConn->retry++;
 
     if (pConn->retry < 4) {
-      tTrace("%s %p, re-send msg:%s to %s:%hu", pRpc->label, pConn, 
-             taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
+      tTrace("%s, re-send msg:%s to %s:%hu", pConn->info, taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
       rpcSendMsgToPeer(pConn, pConn->pReqMsg, pConn->reqMsgLen);      
       taosTmrReset(rpcProcessRetryTimer, tsRpcTimer, pConn, pRpc->tmrCtrl, &pConn->pTimer);
     } else {
       // close the connection
-      tTrace("%s %p, failed to send msg:%s to %s:%hu", pRpc->label, pConn,
-              taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
+      tTrace("%s, failed to send msg:%s to %s:%hu", pConn->info, taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
       reportDisc = 1;
     }
   } else {
-    tTrace("%s %p, retry timer not processed", pRpc->label, pConn);
+    tTrace("%s, retry timer not processed", pConn->info);
   }
 
   rpcUnlockConn(pConn);
@@ -1187,10 +1192,10 @@ static void rpcProcessIdleTimer(void *param, void *tmrId) {
   SRpcInfo *pRpc = pConn->pRpc;
 
   if (pConn->user[0]) {
-    tTrace("%s %p, close the connection since no activity", pRpc->label, pConn);
+    tTrace("%s, close the connection since no activity", pConn->info);
     if (pConn->inType && pRpc->cfp) {
       // if there are pending request, notify the app
-      tTrace("%s %p, notify the app, connection is gone", pRpc->label, pConn);
+      tTrace("%s, notify the app, connection is gone", pConn->info);
 /*
       SRpcMsg rpcMsg;
       rpcMsg.pCont = NULL;
@@ -1203,7 +1208,7 @@ static void rpcProcessIdleTimer(void *param, void *tmrId) {
     }
     rpcCloseConn(pConn);
   } else {
-    tTrace("%s %p, idle timer:%p not processed", pRpc->label, pConn, tmrId);
+    tTrace("%s, idle timer:%p not processed", pConn->info, tmrId);
   }
 }
 
@@ -1214,11 +1219,11 @@ static void rpcProcessProgressTimer(void *param, void *tmrId) {
   rpcLockConn(pConn);
 
   if (pConn->inType && pConn->user[0]) {
-    tTrace("%s %p, progress timer expired, send progress", pRpc->label, pConn);
+    tTrace("%s, progress timer expired, send progress", pConn->info);
     rpcSendQuickRsp(pConn, TSDB_CODE_ACTION_IN_PROGRESS);
     taosTmrReset(rpcProcessProgressTimer, tsRpcTimer/2, pConn, pRpc->tmrCtrl, &pConn->pTimer);
   } else {
-    tTrace("%s %p, progress timer:%p not processed", pRpc->label, pConn, tmrId);
+    tTrace("%s, progress timer:%p not processed", pConn->info, tmrId);
   }
 
   rpcUnlockConn(pConn);
@@ -1252,7 +1257,7 @@ static int32_t rpcCompressRpcMsg(char* pCont, int32_t contLen) {
     memcpy(pCont + overhead, buf, compLen);
     
     pHead->comp = 1;
-    tTrace("compress rpc msg, before:%d, after:%d", contLen, compLen);
+    //tTrace("compress rpc msg, before:%d, after:%d", contLen, compLen);
     finalLen = compLen + overhead;
   } else {
     finalLen = contLen;
@@ -1286,7 +1291,7 @@ static SRpcHead *rpcDecompressRpcMsg(SRpcHead *pHead) {
       pNewHead->msgLen = rpcMsgLenFromCont(origLen);
       rpcFreeMsg(pHead); // free the compressed message buffer
       pHead = pNewHead; 
-      tTrace("decompress rpc msg, compLen:%d, after:%d", compLen, contLen);
+      //tTrace("decompress rpc msg, compLen:%d, after:%d", compLen, contLen);
     } else {
       tError("failed to allocate memory to decompress msg, contLen:%d", contLen);
     }
@@ -1343,7 +1348,6 @@ static int rpcAddAuthPart(SRpcConn *pConn, char *msg, int msgLen) {
 
 static int rpcCheckAuthentication(SRpcConn *pConn, char *msg, int msgLen) {
   SRpcHead *pHead = (SRpcHead *)msg;
-  SRpcInfo *pRpc = pConn->pRpc;
   int       code = 0;
 
   if ((pConn->secured && pHead->spi == 0) || (pHead->spi == 0 && pConn->spi == 0)){
@@ -1371,20 +1375,20 @@ static int rpcCheckAuthentication(SRpcConn *pConn, char *msg, int msgLen) {
     delta = (int32_t)htonl(pDigest->timeStamp);
     delta -= (int32_t)taosGetTimestampSec();
     if (abs(delta) > 900) {
-      tWarn("%s %p, time diff:%d is too big, msg discarded", pRpc->label, pConn, delta);
+      tWarn("%s, time diff:%d is too big, msg discarded", pConn->info, delta);
       code = TSDB_CODE_INVALID_TIME_STAMP;
     } else {
       if (rpcAuthenticateMsg(pHead, msgLen-TSDB_AUTH_LEN, pDigest->auth, pConn->secret) < 0) {
-        tError("%s %p, authentication failed, msg discarded", pRpc->label, pConn);
+        tError("%s, authentication failed, msg discarded", pConn->info);
         code = TSDB_CODE_AUTH_FAILURE;
       } else {
         pHead->msgLen = (int32_t)htonl((uint32_t)pHead->msgLen) - sizeof(SRpcDigest);
         if ( !rpcIsReq(pHead->msgType) ) pConn->secured = 1;  // link is secured for client
-        tTrace("%s %p, message is authenticated", pRpc->label, pConn);
+        //tTrace("%s, message is authenticated", pConn->info);
       }
     }
   } else {
-    tTrace("%s %p, auth spi:%d not matched with received:%d", pRpc->label, pConn, pConn->spi, pHead->spi);
+    tError("%s, auth spi:%d not matched with received:%d", pConn->info, pConn->spi, pHead->spi);
     code = TSDB_CODE_AUTH_FAILURE;
   }
 
diff --git a/src/rpc/src/rpcUdp.c b/src/rpc/src/rpcUdp.c
index c551f6b1db..677187e3b9 100644
--- a/src/rpc/src/rpcUdp.c
+++ b/src/rpc/src/rpcUdp.c
@@ -218,7 +218,7 @@ static void *taosRecvUdpData(void *param) {
   while (1) {
     dataLen = recvfrom(pConn->fd, pConn->buffer, RPC_MAX_UDP_SIZE, 0, (struct sockaddr *)&sourceAdd, &addLen);
     port = ntohs(sourceAdd.sin_port);
-    tTrace("%s msg is recv from 0x%x:%hu len:%d", pConn->label, sourceAdd.sin_addr.s_addr, port, dataLen);
+    //tTrace("%s msg is recv from 0x%x:%hu len:%d", pConn->label, sourceAdd.sin_addr.s_addr, port, dataLen);
 
     if (dataLen < sizeof(SRpcHead)) {
       tError("%s recvfrom failed, reason:%s\n", pConn->label, strerror(errno));
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index 1b161a4ad7..f502c1babd 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -80,7 +80,7 @@ STable *tsdbDecodeTable(void *cont, int contLen) {
   T_READ_MEMBER(ptr, int8_t, pTable->type);
   int len = *(int *)ptr;
   ptr = (char *)ptr + sizeof(int);
-  pTable->name = calloc(1, len + VARSTR_HEADER_SIZE);
+  pTable->name = calloc(1, len + VARSTR_HEADER_SIZE + 1);
   if (pTable->name == NULL) return NULL;
   
   varDataSetLen(pTable->name, len);
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 0f92be0967..6dabc98ae8 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -429,7 +429,7 @@ static void vnodeNotifyRole(void *ahandle, int8_t role) {
 
 static void vnodeNotifyFileSynced(void *ahandle, uint64_t fversion) {
   SVnodeObj *pVnode = ahandle;
-  vTrace("vgId:%d, data file is synced", pVnode->vgId);
+  vTrace("vgId:%d, data file is synced, fversion:%" PRId64 "", pVnode->vgId, fversion);
 
   pVnode->fversion = fversion;
   pVnode->version = fversion;
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index ec772fd4d1..8634a523f3 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -12,6 +12,7 @@ python3 ./test.py $1 -f insert/binary.py
 python3 ./test.py $1 -f insert/nchar.py
 python3 ./test.py $1 -f insert/nchar-boundary.py
 python3 ./test.py $1 -f insert/nchar-unicode.py
+python3 ./test.py $1 -f insert/multi.py
 
 python3 ./test.py $1 -f table/column_name.py
 python3 ./test.py $1 -f table/column_num.py
diff --git a/tests/pytest/insert/bool.py b/tests/pytest/insert/bool.py
index 062563f4ab..c175afd8b5 100644
--- a/tests/pytest/insert/bool.py
+++ b/tests/pytest/insert/bool.py
@@ -58,6 +58,14 @@ class TDTestCase:
         tdSql.query('select * from tb order by ts desc')
         tdLog.info('tdSql.checkRow(6)')
         tdSql.checkRows(6)
+        tdLog.info('=============== step7')
+        tdLog.info("insert into tb values (now+6m, true)")
+        tdSql.execute("insert into tb values (now+5m, true)")
+        tdLog.info('select * from tb order by ts desc')
+        tdSql.query('select * from tb order by ts desc')
+        tdLog.info('tdSql.checkRow(7)')
+        tdSql.checkRows(7)
+# convert end
 # convert end
 
     def stop(self):
diff --git a/tests/pytest/smoketest.sh b/tests/pytest/smoketest.sh
index c0878354e0..6314b3f83b 100755
--- a/tests/pytest/smoketest.sh
+++ b/tests/pytest/smoketest.sh
@@ -21,6 +21,8 @@ python3 ./test.py $1 -f insert/date.py
 python3 ./test.py $1 -s && sleep 1
 python3 ./test.py $1 -f insert/nchar.py
 python3 ./test.py $1 -s && sleep 1
+python3 ./test.py $1 -f insert/multi.py
+python3 ./test.py $1 -s && sleep 1
 
 python3 ./test.py $1 -f table/column_name.py
 python3 ./test.py $1 -s && sleep 1
diff --git a/tests/pytest/table/boundary.py b/tests/pytest/table/boundary.py
new file mode 100644
index 0000000000..faa222231b
--- /dev/null
+++ b/tests/pytest/table/boundary.py
@@ -0,0 +1,161 @@
+# -*- coding: utf-8 -*-
+
+import random
+import string
+import subprocess
+import sys
+from util.log import *
+from util.cases import *
+from util.sql import *
+
+
+class TDTestCase:
+    def init( self, conn ):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+
+    def getLimitFromSourceCode( self, name ):
+        cmd = "grep -w '#define %s' ../../src/inc/taosdef.h|awk '{print $3}'" % name
+        return int(subprocess.check_output(cmd, shell=True))
+
+
+    def generateString( self, length ):
+        chars = string.ascii_uppercase + string.ascii_lowercase
+        v = ""
+        for i in range( length ):
+            v += random.choice( chars )
+        return v
+
+
+    def checkTagBoundaries( self ):
+        tdLog.debug( "checking tag boundaries" )
+        tdSql.prepare()
+
+        maxTags = self.getLimitFromSourceCode( 'TSDB_MAX_TAGS' )
+        totalTagsLen = self.getLimitFromSourceCode( 'TSDB_MAX_TAGS_LEN' )
+        tdLog.notice( "max tags is %d" % maxTags )
+        tdLog.notice( "max total tag length is %d" % totalTagsLen )
+
+        # for binary tags, 2 bytes are used for length
+        tagLen = (totalTagsLen - maxTags * 2) // maxTags
+        firstTagLen = totalTagsLen - 2 * maxTags - tagLen * (maxTags - 1)
+
+        sql = "create table cars(ts timestamp, f int) tags(t0 binary(%d)" % firstTagLen
+        for i in range( 1, maxTags ):
+            sql += ", t%d binary(%d)" % (i, tagLen)
+        sql += ");"
+
+        tdLog.debug( "creating super table: " + sql )
+        tdSql.execute( sql )
+        tdSql.query( 'show stables' )
+        tdSql.checkRows( 1 )
+
+        for i in range( 10 ):
+            sql = "create table car%d using cars tags('%d'" % (i, i)
+            sql += ", '0'" * (maxTags - 1) + ");"
+            tdLog.debug( "creating table: " + sql )
+            tdSql.execute( sql )
+
+            sql = "insert into car%d values(now, 0);" % i
+            tdLog.debug( "inserting data: " + sql )
+            tdSql.execute( sql )
+
+        tdSql.query( 'show tables' )
+        tdLog.info( 'tdSql.checkRow(10)' )
+        tdSql.checkRows( 10 )
+
+        tdSql.query( 'select * from cars;' )
+        tdSql.checkRows( 10 )
+
+
+    def checkColumnBoundaries( self ):
+        tdLog.debug( "checking column boundaries" )
+        tdSql.prepare()
+
+        # one column is for timestamp
+        maxCols = self.getLimitFromSourceCode( 'TSDB_MAX_COLUMNS' ) - 1
+
+        sql = "create table cars (ts timestamp"
+        for i in range( maxCols ):
+            sql += ", c%d int" % i
+        sql += ");"
+        tdSql.execute( sql )
+        tdSql.query( 'show tables' )
+        tdSql.checkRows( 1 )
+
+        sql = "insert into cars values (now"
+        for i in range( maxCols ):
+            sql += ", %d" % i
+        sql += ");"
+        tdSql.execute( sql )
+        tdSql.query( 'select * from cars' )
+        tdSql.checkRows( 1 )
+
+
+    def checkTableNameBoundaries( self ):
+        tdLog.debug( "checking table name boundaries" )
+        tdSql.prepare()
+
+        maxTableNameLen = self.getLimitFromSourceCode( 'TSDB_TABLE_NAME_LEN' )
+        tdLog.notice( "table name max length is %d" % maxTableNameLen )
+
+        name = self.generateString( maxTableNameLen - 1)
+        tdLog.info( "table name is '%s'" % name )
+
+        tdSql.execute( "create table %s (ts timestamp, value int)" % name )
+        tdSql.execute( "insert into %s values(now, 0)" % name )
+
+        tdSql.query( 'show tables' )
+        tdSql.checkRows( 1 )
+
+        tdSql.query( 'select * from %s' % name )
+        tdSql.checkRows( 1 )
+
+
+    def checkRowBoundaries( self ):
+        tdLog.debug( "checking row boundaries" )
+        tdSql.prepare()
+
+        # 8 bytes for timestamp
+        maxRowSize = 65536 - 8
+        maxCols = self.getLimitFromSourceCode( 'TSDB_MAX_COLUMNS' ) - 1
+
+        # for binary cols, 2 bytes are used for length
+        colLen = (maxRowSize - maxCols * 2) // maxCols
+        firstColLen = maxRowSize - 2 * maxCols - colLen * (maxCols - 1)
+
+        sql = "create table cars (ts timestamp, c0 binary(%d)" % firstColLen
+        for i in range( 1, maxCols ):
+            sql += ", c%d binary(%d)" % (i, colLen)
+        sql += ");"
+        tdSql.execute( sql )
+        tdSql.query( 'show tables' )
+        tdSql.checkRows( 1 )
+
+        col = self.generateString( firstColLen )
+        sql = "insert into cars values (now, '%s'" % col
+        col = self.generateString( colLen )
+        for i in range( 1, maxCols ):
+            sql += ", '%s'" % col 
+        sql += ");"
+        tdLog.info( sql );
+        tdSql.execute( sql )
+        tdSql.query( "select * from cars" )
+        tdSql.checkRows( 1 )
+
+
+    def run(self):
+        self.checkTagBoundaries()
+        self.checkColumnBoundaries()
+        self.checkTableNameBoundaries()
+        self.checkRowBoundaries()
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/table/column_name.py b/tests/pytest/table/column_name.py
index bb1f587a65..aa958fd60c 100644
--- a/tests/pytest/table/column_name.py
+++ b/tests/pytest/table/column_name.py
@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import sys
+import string
+import random
+import subprocess
 from util.log import *
 from util.cases import *
 from util.sql import *
@@ -14,34 +17,9 @@ class TDTestCase:
     def run(self):
         tdSql.prepare()
 
-        # TSIM: system sh/stop_dnodes.sh
-        # TSIM:
-        # TSIM: system sh/ip.sh -i 1 -s up
-        # TSIM: system sh/deploy.sh -n dnode1 -m 192.168.0.1 -i 192.168.0.1
-        # TSIM: system sh/cfg.sh -n dnode1 -c walLevel -v 0
-        # TSIM: system sh/exec.sh -n dnode1 -s start
-        # TSIM:
-        # TSIM: sleep 3000
-        # TSIM: sql connect
-        # TSIM:
-        # TSIM: $i = 0
-        # TSIM: $dbPrefix = lm_cm_db
-        # TSIM: $tbPrefix = lm_cm_tb
-        # TSIM: $db = $dbPrefix . $i
-        # TSIM: $tb = $tbPrefix . $i
-        # TSIM:
-        # TSIM: print =============== step1
         tdLog.info('=============== step1')
-        # TSIM: sql create database $db
-        # TSIM: sql use $db
-        # TSIM:
-        # TSIM: sql drop table dd -x step0
         tdLog.info('drop table dd -x step0')
         tdSql.error('drop table dd')
-        # TSIM: return -1
-        # TSIM: step0:
-        # TSIM:
-        # TSIM: sql create table $tb(ts timestamp, int) -x step1
         tdLog.info('create table tb(ts timestamp, int) -x step1')
         tdSql.error('create table tb(ts timestamp, int)')
         # TSIM: return -1
@@ -112,37 +90,24 @@ class TDTestCase:
         tdLog.info('=============== step4')
         # TSIM: sql create table $tb (ts timestamp,
         # a0123456789012345678901234567890123456789 int)
+        getMaxColNum = "grep -w '#define TSDB_COL_NAME_LEN' ../../src/inc/taosdef.h|awk '{print $3}'"
+        boundary = int(subprocess.check_output(getMaxColNum, shell=True))
+        tdLog.info("get max column name length is %d" % boundary)
+        chars = string.ascii_uppercase + string.ascii_lowercase
+
+#        col_name = ''.join(random.choices(chars, k=boundary+1))
+#        tdLog.info(
+#            'create table tb (ts timestamp, %s int), col_name length is %d' % (col_name, len(col_name)))
+#        tdSql.error(
+#            'create table tb (ts timestamp, %s int)' % col_name)
+
+        col_name = ''.join(random.choices(chars, k=boundary))
         tdLog.info(
-            'create table tb (ts timestamp, a0123456789012345678901234567890123456789 int)')
+            'create table tb (ts timestamp, %s int), col_name length is %d' %
+            (col_name, len(col_name)))
         tdSql.execute(
-            'create table tb (ts timestamp, a0123456789012345678901234567890123456789 int)')
-        # TSIM: sql drop table $tb
-        tdLog.info('drop table tb')
-        tdSql.execute('drop table tb')
-        # TSIM:
-        # TSIM: sql show tables
-        tdLog.info('show tables')
-        tdSql.query('show tables')
-        # TSIM: if $rows != 0 then
-        tdLog.info('tdSql.checkRow(0)')
-        tdSql.checkRows(0)
-        # TSIM: return -1
-        # TSIM: endi
-        # TSIM:
-        # TSIM: print =============== step5
-        tdLog.info('=============== step5')
-        # TSIM: sql create table $tb (ts timestamp, a0123456789 int)
-        tdLog.info('create table tb (ts timestamp, a0123456789 int)')
-        tdSql.execute('create table tb (ts timestamp, a0123456789 int)')
-        # TSIM: sql show tables
-        tdLog.info('show tables')
-        tdSql.query('show tables')
-        # TSIM: if $rows != 1 then
-        tdLog.info('tdSql.checkRow(1)')
-        tdSql.checkRows(1)
-        # TSIM: return -1
-        # TSIM: endi
-        # TSIM:
+            'create table tb (ts timestamp, %s int)' % col_name)
+
         # TSIM: sql insert into $tb values (now , 1)
         tdLog.info("insert into tb values (now , 1)")
         tdSql.execute("insert into tb values (now , 1)")
@@ -152,24 +117,6 @@ class TDTestCase:
         # TSIM: if $rows != 1 then
         tdLog.info('tdSql.checkRow(1)')
         tdSql.checkRows(1)
-        # TSIM: return -1
-        # TSIM: endi
-        # TSIM:
-        # TSIM: sql drop database $db
-        tdLog.info('drop database db')
-        tdSql.execute('drop database db')
-        # TSIM: sql show databases
-        tdLog.info('show databases')
-        tdSql.query('show databases')
-        # TSIM: if $rows != 0 then
-        tdLog.info('tdSql.checkRow(0)')
-        tdSql.checkRows(0)
-        # TSIM: return -1
-        # TSIM: endi
-        # TSIM:
-        # TSIM:
-        # TSIM:
-        # TSIM:
 # convert end
 
     def stop(self):
diff --git a/tests/pytest/table/column_num.py b/tests/pytest/table/column_num.py
index 486541bab7..877f0409dc 100644
--- a/tests/pytest/table/column_num.py
+++ b/tests/pytest/table/column_num.py
@@ -76,7 +76,7 @@ class TDTestCase:
         tdSql.checkRows(2)
 
         data = "now"
-        for x in range(0, boundary-1):
+        for x in range(0, boundary - 1):
             data = data + ", %d" % x
         tdLog.info("insert into tb1 values (%s)" % data)
         tdSql.execute("insert into tb1 values (%s)" % data)
diff --git a/tests/pytest/table/tablename-boundary.py b/tests/pytest/table/tablename-boundary.py
index fba1b2cf3c..335073065c 100644
--- a/tests/pytest/table/tablename-boundary.py
+++ b/tests/pytest/table/tablename-boundary.py
@@ -21,7 +21,7 @@ class TDTestCase:
         tableNameMaxLen = int(
             subprocess.check_output(
                 getTableNameLen, shell=True))
-        tdLog.notice("table name max length is %d" % tableNameMaxLen)
+        tdLog.info("table name max length is %d" % tableNameMaxLen)
         chars = string.ascii_uppercase + string.ascii_lowercase
         tb_name = ''.join(random.choices(chars, k=tableNameMaxLen))
         tdLog.info('tb_name length %d' % len(tb_name))
diff --git a/tests/pytest/util/cases.py b/tests/pytest/util/cases.py
index 9026cd0f2f..f65b0dfde3 100644
--- a/tests/pytest/util/cases.py
+++ b/tests/pytest/util/cases.py
@@ -71,7 +71,7 @@ class TDCases:
                     case.run()
                 except Exception as e:
                     tdLog.notice(repr(e))
-                    tdLog.exit("%s failed: %s" % (__file__, fileName))
+                    tdLog.exit("%s failed" % (fileName))
                 case.stop()
                 runNum += 1
                 continue
diff --git a/tests/pytest/util/dnodes.py b/tests/pytest/util/dnodes.py
index 9f7466a7e7..727016adb3 100644
--- a/tests/pytest/util/dnodes.py
+++ b/tests/pytest/util/dnodes.py
@@ -223,8 +223,8 @@ class TDDnode:
         self.running = 1
         tdLog.debug("dnode:%d is running with %s " % (self.index, cmd))
 
-        tdLog.debug("wait 4 seconds for the dnode:%d to start." % (self.index))
-        time.sleep(4)
+        tdLog.debug("wait 5 seconds for the dnode:%d to start." % (self.index))
+        time.sleep(5)
 
     def stop(self):
         if self.valgrind == 0:
@@ -233,16 +233,14 @@ class TDDnode:
             toBeKilled = "valgrind.bin"
 
         if self.running != 0:
-            killCmd = "ps -ef|grep -w %s| grep '%s' | grep -v grep | awk '{print $2}' | xargs kill -INT" % (
-                toBeKilled, self.cfgDir)
-
             psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             while(processID):
+                killCmd = "kill -INT %s" % processID
                 os.system(killCmd)
                 time.sleep(1)
-                processID = subprocess.check_output(psCmd, shell=True)
+                processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             self.running = 0
             tdLog.debug("dnode:%d is stopped by kill -INT" % (self.index))
@@ -254,15 +252,14 @@ class TDDnode:
             toBeKilled = "valgrind.bin"
 
         if self.running != 0:
-            killCmd = "ps -ef|grep -w %s| grep '%s' | grep -v grep | awk '{print $2}' | xargs kill -KILL" % (
-                toBeKilled, self.cfgDir)
             psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             while(processID):
+                killCmd = "kill -KILL %s" % processID
                 os.system(killCmd)
                 time.sleep(1)
-                processID = subprocess.check_output(psCmd, shell=True)
+                processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             self.running = 0
             tdLog.debug("dnode:%d is stopped by kill -KILL" % (self.index))
@@ -307,21 +304,21 @@ class TDDnodes:
         self.dnodes.append(TDDnode(10))
 
     def init(self, path):
-        killCmd = "ps -ef|grep -w taosd | grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
-        killCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
         binPath = os.path.dirname(os.path.realpath(__file__))
         binPath = binPath + "/../../../debug/"
@@ -407,27 +404,27 @@ class TDDnodes:
             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)
+        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)
-        killCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
-        killCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
         # if os.system(cmd) != 0 :
         # tdLog.exit(cmd)
diff --git a/tests/pytest/util/sql.py b/tests/pytest/util/sql.py
index 0e7e186206..75f3bd9044 100644
--- a/tests/pytest/util/sql.py
+++ b/tests/pytest/util/sql.py
@@ -15,6 +15,7 @@ import sys
 import os
 import time
 import datetime
+import inspect
 from util.log import *
 
 
@@ -44,7 +45,12 @@ class TDSql:
         except BaseException:
             expectErrNotOccured = False
         if expectErrNotOccured:
-            tdLog.exit("failed: sql:%.40s, expect error not occured" % (sql))
+            frame = inspect.stack()[1]
+            callerModule = inspect.getmodule(frame[0])
+            callerFilename = callerModule.__file__
+            tdLog.exit(
+                "%s failed: sql:%.40s, expect error not occured" %
+                (callerFilename, sql))
         else:
             tdLog.info("sql:%.40s, expect error occured" % (sql))
 
@@ -62,33 +68,39 @@ class TDSql:
 
     def checkRows(self, expectRows):
         if self.queryRows != expectRows:
+            frame = inspect.stack()[1]
+            callerModule = inspect.getmodule(frame[0])
+            callerFilename = callerModule.__file__
             tdLog.exit(
-                "failed: sql:%.40s, queryRows:%d != expect:%d" %
-                (self.sql, self.queryRows, expectRows))
+                "%s failed: sql:%.40s, queryRows:%d != expect:%d" %
+                (callerFilename, self.sql, self.queryRows, expectRows))
         tdLog.info("sql:%.40s, queryRows:%d == expect:%d" %
                    (self.sql, self.queryRows, expectRows))
 
     def checkData(self, row, col, data):
+        frame = inspect.stack()[1]
+        callerModule = inspect.getmodule(frame[0])
+        callerFilename = callerModule.__file__
+
         if row < 0:
             tdLog.exit(
-                "failed: sql:%.40s, row:%d is smaller than zero" %
-                (self.sql, row))
+                "%s failed: sql:%.40s, row:%d is smaller than zero" %
+                (callerFilename, self.sql, row))
         if col < 0:
             tdLog.exit(
-                "failed: sql:%.40s, col:%d is smaller than zero" %
-                (self.sql, col))
+                "%s failed: sql:%.40s, col:%d is smaller than zero" %
+                (callerFilename, self.sql, col))
         if row >= self.queryRows:
             tdLog.exit(
-                "failed: sql:%.40s, row:%d is larger than queryRows:%d" %
-                (self.sql, row, self.queryRows))
+                "%s failed: sql:%.40s, row:%d is larger than queryRows:%d" %
+                (callerFilename, self.sql, row, self.queryRows))
         if col >= self.queryCols:
             tdLog.exit(
-                "failed: sql:%.40s, col:%d is larger than queryRows:%d" %
-                (self.sql, col, self.queryCols))
+                "%s failed: sql:%.40s, col:%d is larger than queryRows:%d" %
+                (callerFilename, self.sql, col, self.queryCols))
         if self.queryResult[row][col] != data:
-            tdLog.exit(
-                "failed: sql:%.40s row:%d col:%d data:%s != expect:%s" %
-                (self.sql, row, col, self.queryResult[row][col], data))
+            tdLog.exit("%s failed: sql:%.40s row:%d col:%d data:%s != expect:%s" % (
+                callerFilename, self.sql, row, col, self.queryResult[row][col], data))
 
         if data is None:
             tdLog.info("sql:%.40s, row:%d col:%d data:%s == expect:%s" %
@@ -104,22 +116,26 @@ class TDSql:
                        (self.sql, row, col, self.queryResult[row][col], data))
 
     def getData(self, row, col):
+        frame = inspect.stack()[1]
+        callerModule = inspect.getmodule(frame[0])
+        callerFilename = callerModule.__file__
+
         if row < 0:
             tdLog.exit(
-                "failed: sql:%.40s, row:%d is smaller than zero" %
-                (self.sql, row))
+                "%s failed: sql:%.40s, row:%d is smaller than zero" %
+                (callerFilename, self.sql, row))
         if col < 0:
             tdLog.exit(
-                "failed: sql:%.40s, col:%d is smaller than zero" %
-                (self.sql, col))
+                "%s failed: sql:%.40s, col:%d is smaller than zero" %
+                (callerFilename, self.sql, col))
         if row >= self.queryRows:
             tdLog.exit(
-                "failed: sql:%.40s, row:%d is larger than queryRows:%d" %
-                (self.sql, row, self.queryRows))
+                "%s failed: sql:%.40s, row:%d is larger than queryRows:%d" %
+                (callerFilename, self.sql, row, self.queryRows))
         if col >= self.queryCols:
             tdLog.exit(
-                "failed: sql:%.40s, col:%d is larger than queryRows:%d" %
-                (self.sql, col, self.queryCols))
+                "%s failed: sql:%.40s, col:%d is larger than queryRows:%d" %
+                (callerFilename, self.sql, col, self.queryCols))
         return self.queryResult[row][col]
 
     def executeTimes(self, sql, times):
@@ -137,8 +153,12 @@ class TDSql:
 
     def checkAffectedRows(self, expectAffectedRows):
         if self.affectedRows != expectAffectedRows:
-            tdLog.exit("failed: sql:%.40s, affectedRows:%d != expect:%d" %
-                       (self.sql, self.affectedRows, expectAffectedRows))
+            frame = inspect.stack()[1]
+            callerModule = inspect.getmodule(frame[0])
+            callerFilename = callerModule.__file__
+
+            tdLog.exit("%s failed: sql:%.40s, affectedRows:%d != expect:%d" % (
+                callerFilename, self.sql, self.affectedRows, expectAffectedRows))
         tdLog.info("sql:%.40s, affectedRows:%d == expect:%d" %
                    (self.sql, self.affectedRows, expectAffectedRows))
 
diff --git a/tests/pytest/valgrind-test.sh b/tests/pytest/valgrind-test.sh
index 77c2b321df..0b5dfc0fa3 100755
--- a/tests/pytest/valgrind-test.sh
+++ b/tests/pytest/valgrind-test.sh
@@ -1,33 +1,35 @@
 #!/bin/bash
-python3 ./test.py $1 -f insert/basic.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/int.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/float.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/bigint.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/bool.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/double.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/smallint.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/tinyint.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/binary.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/date.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/nchar.py
-python3 ./test.py $1 -s && sleep 1
+python3 ./test.py -g -f insert/basic.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/int.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/float.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/bigint.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/bool.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/double.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/smallint.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/tinyint.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/binary.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/date.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/nchar.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/multi.py
+python3 ./test.py -g -s && sleep 1
 
-python3 ./test.py $1 -f table/column_name.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f table/column_num.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f table/db_table.py
-python3 ./test.py $1 -s && sleep 1
+python3 ./test.py -g -f table/column_name.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f table/column_num.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f table/db_table.py
+python3 ./test.py -g -s && sleep 1
 
-python3 ./test.py $1 -f import_merge/importDataLastSub.py
-python3 ./test.py $1 -s && sleep 1
+python3 ./test.py -g -f import_merge/importDataLastSub.py
+python3 ./test.py -g -s && sleep 1