diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 32d44dfb81..f58431849c 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -358,7 +358,7 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     }
 
     case TSDB_SQL_CFG_DNODE: {
-      const char* msg2 = "invalid configure options or values, such as resetlog / debugFlag 135 / balance 'vnode:1-dnode:2' / monitor 1 ";
+      const char* msg2 = "invalid configure options or values, such as resetlog / debugFlag 135 / balance 'vnode:2-dnode:2' / monitor 1 ";
       const char* msg3 = "invalid dnode ep";
 
       /* validate the ip address */
@@ -4700,10 +4700,10 @@ int32_t validateDNodeConfig(tDCLSQL* pOptions) {
   } else if ((strncasecmp(cfgOptions[tokenBalance].name, pOptionToken->z, pOptionToken->n) == 0) &&
              (cfgOptions[tokenBalance].len == pOptionToken->n)) {
     SSQLToken* pValToken = &pOptions->a[2];
-    int32_t vnodeIndex = 0;
-    int32_t dnodeIndex = 0;
+    int32_t vnodeId = 0;
+    int32_t dnodeId = 0;
     strdequote(pValToken->z);
-    bool parseOk = taosCheckBalanceCfgOptions(pValToken->z, &vnodeIndex, &dnodeIndex);
+    bool parseOk = taosCheckBalanceCfgOptions(pValToken->z, &vnodeId, &dnodeId);
     if (!parseOk) {
       return TSDB_CODE_TSC_INVALID_SQL;  // options value is invalid
     }
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 9a1fa77629..6c1faf6f9d 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -106,13 +106,14 @@ static void tscUpdateVgroupInfo(SSqlObj *pObj, SRpcEpSet *pEpSet) {
   SCMCorVgroupInfo *pVgroupInfo = &pTableMetaInfo->pTableMeta->corVgroupInfo;
 
   taosCorBeginWrite(&pVgroupInfo->version);
-  //TODO(dengyihao), dont care vgid 
+  tscDebug("before: Endpoint in use: %d", pVgroupInfo->inUse);
   pVgroupInfo->inUse = pEpSet->inUse;
   pVgroupInfo->numOfEps = pEpSet->numOfEps;
-  for (int32_t i = 0; pVgroupInfo->numOfEps; i++) {
+  for (int32_t i = 0; i < pVgroupInfo->numOfEps; i++) {
     strncpy(pVgroupInfo->epAddr[i].fqdn, pEpSet->fqdn[i], TSDB_FQDN_LEN);
     pVgroupInfo->epAddr[i].port = pEpSet->port[i];
   }
+  tscDebug("after: EndPoint in use: %d", pVgroupInfo->inUse);
   taosCorEndWrite(&pVgroupInfo->version);
 }
 void tscPrintMgmtEp() {
@@ -283,9 +284,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
   }
 
   if (pEpSet) { 
-    //SRpcEpSet dump; 
-    tscEpSetHtons(pEpSet); 
-    if (tscEpSetIsEqual(&pSql->epSet, pEpSet)) {
+    if (!tscEpSetIsEqual(&pSql->epSet, pEpSet)) {
       if(pCmd->command < TSDB_SQL_MGMT)  { 
         tscUpdateVgroupInfo(pSql, pEpSet); 
       } else {
diff --git a/src/client/src/tscSub.c b/src/client/src/tscSub.c
index 526f380475..8e554d62ff 100644
--- a/src/client/src/tscSub.c
+++ b/src/client/src/tscSub.c
@@ -256,11 +256,12 @@ static int tscUpdateSubscription(STscObj* pObj, SSub* pSub) {
   }
   size_t numOfTables = taosArrayGetSize(tables);
 
+  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
   SArray* progress = taosArrayInit(numOfTables, sizeof(SSubscriptionProgress));
   for( size_t i = 0; i < numOfTables; i++ ) {
     STidTags* tt = taosArrayGet( tables, i );
     SSubscriptionProgress p = { .uid = tt->uid };
-    p.key = tscGetSubscriptionProgress(pSub, tt->uid, INT64_MIN);
+    p.key = tscGetSubscriptionProgress(pSub, tt->uid, pQueryInfo->window.skey);
     taosArrayPush(progress, &p);
   }
   taosArraySort(progress, tscCompareSubscriptionProgress);
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index 7ba96ceb60..b9afef65d9 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -174,7 +174,7 @@ bool taosCheckGlobalCfg();
 void taosSetAllDebugFlag();
 bool taosCfgDynamicOptions(char *msg);
 int  taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
-bool taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeIndex, int32_t *dnodeIndex);
+bool taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeId, int32_t *dnodeId);
  
 #ifdef __cplusplus
 }
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index c79b016b93..08349374b1 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -1315,7 +1315,7 @@ int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
  * alter dnode 1 balance "vnode:1-dnode:2"
  */
 
-bool taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeIndex, int32_t *dnodeIndex) {
+bool taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeId, int32_t *dnodeId) {
   int len = strlen(option);
   if (strncasecmp(option, "vnode:", 6) != 0) {
     return false;
@@ -1331,9 +1331,9 @@ bool taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeIndex, int32_t
     return false;
   }
 
-  *vnodeIndex = strtol(option + 6, NULL, 10);
-  *dnodeIndex = strtol(option + pos + 6, NULL, 10);
-  if (*vnodeIndex <= 1 || *dnodeIndex <= 0) {
+  *vnodeId = strtol(option + 6, NULL, 10);
+  *dnodeId = strtol(option + pos + 6, NULL, 10);
+  if (*vnodeId <= 1 || *dnodeId <= 0) {
     return false;
   }
 
diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index 59b2c0220b..c440fd3c06 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -120,12 +120,17 @@ TAOS_DEFINE_ERROR(TSDB_CODE_MND_SDB_OBJ_NOT_THERE,        0, 0x0323, "sdb object
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_SDB_INVAID_META_ROW,      0, 0x0324, "sdb invalid meta row")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_SDB_INVAID_KEY_TYPE,      0, 0x0325, "sdb invalid key type")
 
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_DNODE_ALREADY_EXIST,      0, 0x0330, "mnode dnode already exist")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_DNODE_NOT_EXIST,          0, 0x0331, "mnode dnode not exist")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_VGROUP_NOT_EXIST,         0, 0x0332, "mnode vgroup not exist")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_NO_REMOVE_MASTER,         0, 0x0333, "mnode cant not remove master")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_NO_ENOUGH_DNODES,         0, 0x0334, "mnode no enough dnodes")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_CLUSTER_CFG_INCONSISTENT, 0, 0x0335, "mnode cluster cfg inconsistent")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_DNODE_ALREADY_EXIST,      0, 0x0330, "dnode already exist")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_DNODE_NOT_EXIST,          0, 0x0331, "dnode not exist")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_VGROUP_NOT_EXIST,         0, 0x0332, "vgroup not exist")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_NO_REMOVE_MASTER,         0, 0x0333, "cant not remove master")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_NO_ENOUGH_DNODES,         0, 0x0334, "no enough dnodes")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_CLUSTER_CFG_INCONSISTENT, 0, 0x0335, "cluster cfg inconsistent")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_DNODE_CFG_OPTION, 0, 0x0336, "invalid dnode cfg option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_BALANCE_ENABLED,          0, 0x0337, "balance already enabled")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_VGROUP_NOT_IN_DNODE,      0, 0x0338, "vgroup not in dnode")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_VGROUP_ALREADY_IN_DNODE,  0, 0x0339, "vgroup already in dnode")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_DNODE_NOT_FREE,           0, 0x033A, "dnode not avaliable")
 
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_ACCT_ALREADY_EXIST,       0, 0x0340, "mnode accounts already exist")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_ACCT,             0, 0x0341, "mnode invalid account")
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 96386aab65..e095567d75 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -149,6 +149,7 @@ enum _mgmt_table {
 
 #define TSDB_ALTER_TABLE_ADD_COLUMN        5
 #define TSDB_ALTER_TABLE_DROP_COLUMN       6
+#define TSDB_ALTER_TABLE_CHANGE_COLUMN     7
 
 #define TSDB_FILL_NONE      0
 #define TSDB_FILL_NULL      1
diff --git a/src/inc/tbalance.h b/src/inc/tbalance.h
index 9ee8d73189..f0da4a3747 100644
--- a/src/inc/tbalance.h
+++ b/src/inc/tbalance.h
@@ -29,7 +29,7 @@ void    balanceAsyncNotify();
 void    balanceSyncNotify();
 void    balanceReset();
 int32_t balanceAllocVnodes(struct SVgObj *pVgroup);
-int32_t balanceCfgDnode(struct SDnodeObj *pDnode, const char *option);
+int32_t balanceAlterDnode(struct SDnodeObj *pDnode, int32_t vnodeId, int32_t dnodeId);
 int32_t balanceDropDnode(struct SDnodeObj *pDnode);
 
 #ifdef __cplusplus
diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index a2258dcfd8..bab17322f0 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -53,14 +53,12 @@ typedef struct {
   int32_t tsdbId;
   int32_t cacheBlockSize;
   int32_t totalBlocks;
-  int32_t maxTables;    // maximum number of tables this repository can have
   int32_t daysPerFile;  // day per file sharding policy
   int32_t keep;         // day of data to keep
   int32_t keep1;
   int32_t keep2;
   int32_t minRowsPerFileBlock;  // minimum rows per file block
   int32_t maxRowsPerFileBlock;  // maximum rows per file block
-  int32_t commitTime;
   int8_t  precision;
   int8_t  compression;
 } STsdbCfg;
diff --git a/src/kit/taosmigrate/taosmigrateVnodeCfg.c b/src/kit/taosmigrate/taosmigrateVnodeCfg.c
index e830ef78f5..e80e687f02 100644
--- a/src/kit/taosmigrate/taosmigrateVnodeCfg.c
+++ b/src/kit/taosmigrate/taosmigrateVnodeCfg.c
@@ -37,14 +37,12 @@ static int32_t saveVnodeCfg(SVnodeObj *pVnode, char* cfgFile)
   len += snprintf(content + len, maxLen - len, "  \"cfgVersion\": %d,\n", pVnode->cfgVersion);
   len += snprintf(content + len, maxLen - len, "  \"cacheBlockSize\": %d,\n", pVnode->tsdbCfg.cacheBlockSize);
   len += snprintf(content + len, maxLen - len, "  \"totalBlocks\": %d,\n", pVnode->tsdbCfg.totalBlocks);
-  len += snprintf(content + len, maxLen - len, "  \"maxTables\": %d,\n", pVnode->tsdbCfg.maxTables);
   len += snprintf(content + len, maxLen - len, "  \"daysPerFile\": %d,\n", pVnode->tsdbCfg.daysPerFile);
   len += snprintf(content + len, maxLen - len, "  \"daysToKeep\": %d,\n", pVnode->tsdbCfg.keep);
   len += snprintf(content + len, maxLen - len, "  \"daysToKeep1\": %d,\n", pVnode->tsdbCfg.keep1);
   len += snprintf(content + len, maxLen - len, "  \"daysToKeep2\": %d,\n", pVnode->tsdbCfg.keep2);
   len += snprintf(content + len, maxLen - len, "  \"minRowsPerFileBlock\": %d,\n", pVnode->tsdbCfg.minRowsPerFileBlock);
   len += snprintf(content + len, maxLen - len, "  \"maxRowsPerFileBlock\": %d,\n", pVnode->tsdbCfg.maxRowsPerFileBlock);
-  len += snprintf(content + len, maxLen - len, "  \"commitTime\": %d,\n", pVnode->tsdbCfg.commitTime);
   len += snprintf(content + len, maxLen - len, "  \"precision\": %d,\n", pVnode->tsdbCfg.precision);
   len += snprintf(content + len, maxLen - len, "  \"compression\": %d,\n", pVnode->tsdbCfg.compression);
   len += snprintf(content + len, maxLen - len, "  \"walLevel\": %d,\n", pVnode->walCfg.walLevel);
@@ -136,12 +134,12 @@ static int32_t readVnodeCfg(SVnodeObj *pVnode, char* cfgFile)
   }
   pVnode->tsdbCfg.totalBlocks = totalBlocks->valueint;
 
-  cJSON *maxTables = cJSON_GetObjectItem(root, "maxTables");
-  if (!maxTables || maxTables->type != cJSON_Number) {
-    printf("vgId:%d, failed to read vnode cfg, maxTables not found\n", pVnode->vgId);
-    goto PARSE_OVER;
-  }
-  pVnode->tsdbCfg.maxTables = maxTables->valueint;
+  // cJSON *maxTables = cJSON_GetObjectItem(root, "maxTables");
+  // if (!maxTables || maxTables->type != cJSON_Number) {
+  //   printf("vgId:%d, failed to read vnode cfg, maxTables not found\n", pVnode->vgId);
+  //   goto PARSE_OVER;
+  // }
+  // pVnode->tsdbCfg.maxTables = maxTables->valueint;
 
   cJSON *daysPerFile = cJSON_GetObjectItem(root, "daysPerFile");
   if (!daysPerFile || daysPerFile->type != cJSON_Number) {
@@ -185,12 +183,12 @@ static int32_t readVnodeCfg(SVnodeObj *pVnode, char* cfgFile)
   }
   pVnode->tsdbCfg.maxRowsPerFileBlock = maxRowsPerFileBlock->valueint;
 
-  cJSON *commitTime = cJSON_GetObjectItem(root, "commitTime");
-  if (!commitTime || commitTime->type != cJSON_Number) {
-    printf("vgId:%d, failed to read vnode cfg, commitTime not found\n", pVnode->vgId);
-    goto PARSE_OVER;
-  }
-  pVnode->tsdbCfg.commitTime = (int8_t)commitTime->valueint;
+  // cJSON *commitTime = cJSON_GetObjectItem(root, "commitTime");
+  // if (!commitTime || commitTime->type != cJSON_Number) {
+  //   printf("vgId:%d, failed to read vnode cfg, commitTime not found\n", pVnode->vgId);
+  //   goto PARSE_OVER;
+  // }
+  // pVnode->tsdbCfg.commitTime = (int8_t)commitTime->valueint;
 
   cJSON *precision = cJSON_GetObjectItem(root, "precision");
   if (!precision || precision->type != cJSON_Number) {
diff --git a/src/mnode/src/mnodeBalance.c b/src/mnode/src/mnodeBalance.c
index d2ec6dd36e..95a97bd055 100644
--- a/src/mnode/src/mnodeBalance.c
+++ b/src/mnode/src/mnodeBalance.c
@@ -28,7 +28,7 @@ void    balanceCleanUp() {}
 void    balanceAsyncNotify() {}
 void    balanceSyncNotify() {}
 void    balanceReset() {}
-int32_t balanceCfgDnode(struct SDnodeObj *pDnode, const char *option) { return TSDB_CODE_SYN_NOT_ENABLED; }
+int32_t balanceAlterDnode(struct SDnodeObj *pDnode, int32_t vnodeId, int32_t dnodeId) { return TSDB_CODE_SYN_NOT_ENABLED; }
 
 int32_t balanceAllocVnodes(SVgObj *pVgroup) {
   void *     pIter = NULL;
diff --git a/src/mnode/src/mnodeDnode.c b/src/mnode/src/mnodeDnode.c
index 26c4b7a3ea..687bb1873b 100644
--- a/src/mnode/src/mnodeDnode.c
+++ b/src/mnode/src/mnodeDnode.c
@@ -295,10 +295,19 @@ static int32_t mnodeProcessCfgDnodeMsg(SMnodeMsg *pMsg) {
   }
 
   SRpcEpSet epSet = mnodeGetEpSetFromIp(pDnode->dnodeEp);
-  mnodeDecDnodeRef(pDnode);
 
   if (strncasecmp(pCmCfgDnode->config, "balance", 7) == 0) {
-    return balanceCfgDnode(pDnode, pCmCfgDnode->config + 8);
+    int32_t vnodeId = 0;
+    int32_t dnodeId = 0;
+    bool parseOk = taosCheckBalanceCfgOptions(pCmCfgDnode->config + 8, &vnodeId, &dnodeId);
+    if (!parseOk) {
+      mnodeDecDnodeRef(pDnode);
+      return TSDB_CODE_MND_INVALID_DNODE_CFG_OPTION;
+    }
+
+    int32_t code = balanceAlterDnode(pDnode, vnodeId, dnodeId);
+    mnodeDecDnodeRef(pDnode);
+    return code;
   } else {
     SMDCfgDnodeMsg *pMdCfgDnode = rpcMallocCont(sizeof(SMDCfgDnodeMsg));
     strcpy(pMdCfgDnode->ep, pCmCfgDnode->ep);
@@ -314,6 +323,7 @@ static int32_t mnodeProcessCfgDnodeMsg(SMnodeMsg *pMsg) {
 
     mInfo("dnode:%s, is configured by %s", pCmCfgDnode->ep, pMsg->pUser->user);
     dnodeSendMsgToDnode(&epSet, &rpcMdCfgDnodeMsg);
+    mnodeDecDnodeRef(pDnode);
     return TSDB_CODE_SUCCESS;
   }
 }
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 12ab58d949..053a1522a7 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1223,6 +1223,55 @@ static int32_t mnodeDropSuperTableColumn(SMnodeMsg *pMsg, char *colName) {
   return code;
 }
 
+static int32_t mnodeChangeSuperTableColumnCb(SMnodeMsg *pMsg, int32_t code) {
+  SSuperTableObj *pStable = (SSuperTableObj *)pMsg->pTable;
+  mLInfo("app:%p:%p, stable %s, change column result:%s", pMsg->rpcMsg.ahandle, pMsg, pStable->info.tableId,
+         tstrerror(code));
+  return code;
+}
+
+static int32_t mnodeChangeSuperTableColumn(SMnodeMsg *pMsg, char *oldName, char *newName) {
+  SSuperTableObj *pStable = (SSuperTableObj *)pMsg->pTable;
+  int32_t col = mnodeFindSuperTableColumnIndex(pStable, oldName);
+  if (col < 0) {
+    mError("app:%p:%p, stable:%s, change column, oldName: %s, newName: %s", pMsg->rpcMsg.ahandle, pMsg,
+           pStable->info.tableId, oldName, newName);
+    return TSDB_CODE_MND_FIELD_NOT_EXIST;
+  }
+
+  // int32_t  rowSize = 0;
+  uint32_t len = strlen(newName);
+  if (len >= TSDB_COL_NAME_LEN) {
+    return TSDB_CODE_MND_COL_NAME_TOO_LONG;
+  }
+
+  if (mnodeFindSuperTableColumnIndex(pStable, newName) >= 0) {
+    return TSDB_CODE_MND_FIELD_ALREAY_EXIST;
+  }
+  
+  // update
+  SSchema *schema = (SSchema *) (pStable->schema + col);
+  tstrncpy(schema->name, newName, sizeof(schema->name));
+
+  mInfo("app:%p:%p, stable %s, start to modify column %s to %s", pMsg->rpcMsg.ahandle, pMsg, pStable->info.tableId,
+         oldName, newName);
+
+  SSdbOper oper = {
+    .type = SDB_OPER_GLOBAL,
+    .table = tsSuperTableSdb,
+    .pObj = pStable,
+    .pMsg = pMsg,
+    .cb = mnodeChangeSuperTableColumnCb
+  };
+
+  int32_t code = sdbUpdateRow(&oper);
+  if (code == TSDB_CODE_SUCCESS) {
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
+  }
+
+  return code;
+}
+
 // show super tables
 static int32_t mnodeGetShowSuperTableMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
   SDbObj *pDb = mnodeGetDb(pShow->db);
@@ -1405,6 +1454,9 @@ static int32_t mnodeSetSchemaFromSuperTable(SSchema *pSchema, SSuperTableObj *pT
 static int32_t mnodeGetSuperTableMeta(SMnodeMsg *pMsg) {
   SSuperTableObj *pTable = (SSuperTableObj *)pMsg->pTable;
   STableMetaMsg *pMeta   = rpcMallocCont(sizeof(STableMetaMsg) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16));
+  if (pMeta == NULL) {
+    return TSDB_CODE_MND_OUT_OF_MEMORY;
+  }
   pMeta->uid          = htobe64(pTable->uid);
   pMeta->sversion     = htons(pTable->sversion);
   pMeta->tversion     = htons(pTable->tversion);
@@ -1977,6 +2029,48 @@ static int32_t mnodeDropNormalTableColumn(SMnodeMsg *pMsg, char *colName) {
   return code;
 }
 
+static int32_t mnodeChangeNormalTableColumn(SMnodeMsg *pMsg, char *oldName, char *newName) {
+  SChildTableObj *pTable = (SChildTableObj *)pMsg->pTable;
+  int32_t col = mnodeFindNormalTableColumnIndex(pTable, oldName);
+  if (col < 0) {
+    mError("app:%p:%p, ctable:%s, change column, oldName: %s, newName: %s", pMsg->rpcMsg.ahandle, pMsg,
+           pTable->info.tableId, oldName, newName);
+    return TSDB_CODE_MND_FIELD_NOT_EXIST;
+  }
+
+  // int32_t  rowSize = 0;
+  uint32_t len = strlen(newName);
+  if (len >= TSDB_COL_NAME_LEN) {
+    return TSDB_CODE_MND_COL_NAME_TOO_LONG;
+  }
+
+  if (mnodeFindNormalTableColumnIndex(pTable, newName) >= 0) {
+    return TSDB_CODE_MND_FIELD_ALREAY_EXIST;
+  }
+  
+  // update
+  SSchema *schema = (SSchema *) (pTable->schema + col);
+  tstrncpy(schema->name, newName, sizeof(schema->name));
+
+  mInfo("app:%p:%p, ctable %s, start to modify column %s to %s", pMsg->rpcMsg.ahandle, pMsg, pTable->info.tableId,
+         oldName, newName);
+
+  SSdbOper oper = {
+    .type = SDB_OPER_GLOBAL,
+    .table = tsChildTableSdb,
+    .pObj = pTable,
+    .pMsg = pMsg,
+    .cb = mnodeAlterNormalTableColumnCb
+  };
+
+  int32_t code = sdbUpdateRow(&oper);
+  if (code == TSDB_CODE_SUCCESS) {
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
+  }
+
+  return code;
+}
+
 static int32_t mnodeSetSchemaFromNormalTable(SSchema *pSchema, SChildTableObj *pTable) {
   int32_t numOfCols = pTable->numOfColumns;
   for (int32_t i = 0; i < numOfCols; ++i) {
@@ -2596,6 +2690,8 @@ static int32_t mnodeProcessAlterTableMsg(SMnodeMsg *pMsg) {
       code = mnodeAddSuperTableColumn(pMsg, pAlter->schema, 1);
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_COLUMN) {
       code = mnodeDropSuperTableColumn(pMsg, pAlter->schema[0].name);
+    } else if (pAlter->type == TSDB_ALTER_TABLE_CHANGE_COLUMN) {
+      code = mnodeChangeSuperTableColumn(pMsg, pAlter->schema[0].name, pAlter->schema[1].name);
     } else {
     }
   } else {
@@ -2606,6 +2702,8 @@ static int32_t mnodeProcessAlterTableMsg(SMnodeMsg *pMsg) {
       code = mnodeAddNormalTableColumn(pMsg, pAlter->schema, 1);
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_COLUMN) {
       code = mnodeDropNormalTableColumn(pMsg, pAlter->schema[0].name);
+    } else if (pAlter->type == TSDB_ALTER_TABLE_CHANGE_COLUMN) {
+      code = mnodeChangeNormalTableColumn(pMsg, pAlter->schema[0].name, pAlter->schema[1].name);
     } else {
     }
   }
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index 46255a6c8f..089168c31e 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -592,7 +592,7 @@ static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *p
   pSchema[cols].bytes = htons(pShow->bytes[cols]);
   cols++;
 
-  pShow->bytes[cols] = 12 + VARSTR_HEADER_SIZE;
+  pShow->bytes[cols] = 8 + VARSTR_HEADER_SIZE;
   pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
   strcpy(pSchema[cols].name, "status");
   pSchema[cols].bytes = htons(pShow->bytes[cols]);
@@ -619,12 +619,6 @@ static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *p
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
 
-    pShow->bytes[cols] = 40 + VARSTR_HEADER_SIZE;
-    pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-    strcpy(pSchema[cols].name, "end_point");
-    pSchema[cols].bytes = htons(pShow->bytes[cols]);
-    cols++;
-
     pShow->bytes[cols] = 9 + VARSTR_HEADER_SIZE;
     pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
     strcpy(pSchema[cols].name, "vstatus");
@@ -716,27 +710,15 @@ static int32_t mnodeRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, v
       *(int16_t *) pWrite = pVgroup->vnodeGid[i].dnodeId;
       cols++;
 
-      SDnodeObj *pDnode = pVgroup->vnodeGid[i].pDnode;
-
+      SDnodeObj * pDnode = pVgroup->vnodeGid[i].pDnode;
+      const char *role = "NULL";
       if (pDnode != NULL) {
-        pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pDnode->dnodeEp, pShow->bytes[cols]);
-        cols++;
-
-        pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        char *role = mnodeGetMnodeRoleStr(pVgroup->vnodeGid[i].role);
-        STR_WITH_MAXSIZE_TO_VARSTR(pWrite, role, pShow->bytes[cols]);
-        cols++;
-      } else {
-        pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        const char *src = "NULL";
-        STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
-        cols++;
-        
-        pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
-        cols++;
+        role = mnodeGetMnodeRoleStr(pVgroup->vnodeGid[i].role);
       }
+
+      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, role, pShow->bytes[cols]);
+      cols++;
     }
 
     mnodeDecVgroupRef(pVgroup);
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 1220c5ca31..8afc2fd87a 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -5913,8 +5913,10 @@ _cleanup_qinfo:
   tsdbDestroyTableGroup(pTableGroupInfo);
 
 _cleanup_query:
-  taosArrayDestroy(pGroupbyExpr->columnInfo);
-  tfree(pGroupbyExpr);
+  if (pGroupbyExpr != NULL) {
+    taosArrayDestroy(pGroupbyExpr->columnInfo);
+    free(pGroupbyExpr);
+  }
   tfree(pTagCols);
   for (int32_t i = 0; i < numOfOutput; ++i) {
     SExprInfo* pExprInfo = &pExprs[i];
diff --git a/src/query/src/qUtil.c b/src/query/src/qUtil.c
index be84471493..7b03dd9d94 100644
--- a/src/query/src/qUtil.c
+++ b/src/query/src/qUtil.c
@@ -41,6 +41,9 @@ int32_t initWindowResInfo(SWindowResInfo *pWindowResInfo, SQueryRuntimeEnv *pRun
   pWindowResInfo->type = type;
   _hash_fn_t fn = taosGetDefaultHashFunction(type);
   pWindowResInfo->hashList = taosHashInit(threshold, fn, false);
+  if (pWindowResInfo->hashList == NULL) {
+    return TSDB_CODE_QRY_OUT_OF_MEMORY;
+  }
   
   pWindowResInfo->curIndex = -1;
   pWindowResInfo->size     = 0;
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 4790c22668..95840af1a2 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -660,7 +660,7 @@ static SRpcConn *rpcAllocateClientConn(SRpcInfo *pRpc) {
     pConn->spi = pRpc->spi;
     pConn->encrypt = pRpc->encrypt;
     if (pConn->spi) memcpy(pConn->secret, pRpc->secret, TSDB_KEY_LEN);
-    tDebug("%s %p client connection is allocated", pRpc->label, pConn);
+    tDebug("%s %p client connection is allocated, uid:0x%x", pRpc->label, pConn, pConn->linkUid);
   }
 
   return pConn;
@@ -721,7 +721,7 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
     }
   
     taosHashPut(pRpc->hash, hashstr, size, (char *)&pConn, POINTER_BYTES);
-    tDebug("%s %p server connection is allocated", pRpc->label, pConn);
+    tDebug("%s %p server connection is allocated, uid:0x%x", pRpc->label, pConn, pConn->linkUid);
   }
 
   return pConn;
@@ -848,6 +848,16 @@ static int rpcProcessRspHead(SRpcConn *pConn, SRpcHead *pHead) {
     return TSDB_CODE_RPC_ALREADY_PROCESSED;
   }
 
+  if (pHead->code == TSDB_CODE_RPC_MISMATCHED_LINK_ID) {
+    tDebug("%s, mismatched linkUid, link shall be restarted", pConn->info);
+    pConn->secured = 0;
+    ((SRpcHead *)pConn->pReqMsg)->destId = 0;
+    rpcSendMsgToPeer(pConn, pConn->pReqMsg, pConn->reqMsgLen);      
+    if (pConn->connType != RPC_CONN_TCPC)
+      pConn->pTimer = taosTmrStart(rpcProcessRetryTimer, tsRpcTimer, pConn, pRpc->tmrCtrl);
+    return TSDB_CODE_RPC_ALREADY_PROCESSED;
+  }
+
   if (pHead->code == TSDB_CODE_RPC_ACTION_IN_PROGRESS) {
     if (pConn->tretry <= tsRpcMaxRetry) {
       tDebug("%s, peer is still processing the transaction, retry:%d", pConn->info, pConn->tretry);
diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 762d2253e2..3e92c01765 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -70,6 +70,7 @@ typedef struct {
   pthread_rwlock_t rwLock;
 
   int32_t   nTables;
+  int32_t   maxTables;
   STable**  tables;
   SList*    superList;
   SHashObj* uidMap;
@@ -111,9 +112,11 @@ typedef struct {
 
 typedef struct {
   T_REF_DECLARE();
+  SRWLatch     latch;
   TSKEY        keyFirst;
   TSKEY        keyLast;
   int64_t      numOfRows;
+  int32_t      maxTables;
   STableData** tData;
   SList*       actList;
   SList*       bufBlockList;
@@ -304,6 +307,7 @@ typedef struct {
 
 // Operations
 // ------------------ tsdbMeta.c
+#define TSDB_INIT_NTABLES 1024
 #define TABLE_TYPE(t) (t)->type
 #define TABLE_NAME(t) (t)->name
 #define TABLE_CHAR_NAME(t) TABLE_NAME(t)->data
@@ -395,6 +399,7 @@ int   tsdbInsertRowToMem(STsdbRepo* pRepo, SDataRow row, STable* pTable);
 int   tsdbRefMemTable(STsdbRepo* pRepo, SMemTable* pMemTable);
 int   tsdbUnRefMemTable(STsdbRepo* pRepo, SMemTable* pMemTable);
 int   tsdbTakeMemSnapshot(STsdbRepo* pRepo, SMemTable** pMem, SMemTable** pIMem);
+void  tsdbUnTakeMemSnapShot(STsdbRepo* pRepo, SMemTable* pMem, SMemTable* pIMem);
 void* tsdbAllocBytes(STsdbRepo* pRepo, int bytes);
 int   tsdbAsyncCommit(STsdbRepo* pRepo);
 int   tsdbLoadDataFromCache(STable* pTable, SSkipListIterator* pIter, TSKEY maxKey, int maxRowsToRead, SDataCols* pCols,
@@ -429,7 +434,7 @@ STsdbFileH* tsdbNewFileH(STsdbCfg* pCfg);
 void        tsdbFreeFileH(STsdbFileH* pFileH);
 int         tsdbOpenFileH(STsdbRepo* pRepo);
 void        tsdbCloseFileH(STsdbRepo* pRepo);
-SFileGroup* tsdbCreateFGroupIfNeed(STsdbRepo* pRepo, char* dataDir, int fid, int maxTables);
+SFileGroup* tsdbCreateFGroupIfNeed(STsdbRepo* pRepo, char* dataDir, int fid);
 void        tsdbInitFileGroupIter(STsdbFileH* pFileH, SFileGroupIter* pIter, int direction);
 void        tsdbSeekFileGroupIter(SFileGroupIter* pIter, int fid);
 SFileGroup* tsdbGetFileGroupNext(SFileGroupIter* pIter);
@@ -511,6 +516,7 @@ void        tsdbGetDataFileName(STsdbRepo* pRepo, int fid, int type, char* fname
 int         tsdbLockRepo(STsdbRepo* pRepo);
 int         tsdbUnlockRepo(STsdbRepo* pRepo);
 char*       tsdbGetDataDirName(char* rootDir);
+int         tsdbGetNextMaxTables(int tid);
 STsdbMeta*  tsdbGetMeta(TSDB_REPO_T* pRepo);
 STsdbFileH* tsdbGetFile(TSDB_REPO_T* pRepo);
 
diff --git a/src/tsdb/src/tsdbFile.c b/src/tsdb/src/tsdbFile.c
index 767fbc8252..f698878698 100644
--- a/src/tsdb/src/tsdbFile.c
+++ b/src/tsdb/src/tsdbFile.c
@@ -149,7 +149,7 @@ void tsdbCloseFileH(STsdbRepo *pRepo) {
   }
 }
 
-SFileGroup *tsdbCreateFGroupIfNeed(STsdbRepo *pRepo, char *dataDir, int fid, int maxTables) {
+SFileGroup *tsdbCreateFGroupIfNeed(STsdbRepo *pRepo, char *dataDir, int fid) {
   STsdbFileH *pFileH = pRepo->tsdbFileH;
 
   if (pFileH->nFGroups >= pFileH->maxFGroups) return NULL;
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 772bcf48d6..89a19c15af 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -62,7 +62,6 @@ static int         tsdbRestoreInfo(STsdbRepo *pRepo);
 static int         tsdbInitSubmitBlkIter(SSubmitBlk *pBlock, SSubmitBlkIter *pIter);
 static void        tsdbAlterCompression(STsdbRepo *pRepo, int8_t compression);
 static int         tsdbAlterKeep(STsdbRepo *pRepo, int32_t keep);
-static int         tsdbAlterMaxTables(STsdbRepo *pRepo, int32_t maxTables);
 static int         tsdbAlterCacheTotalBlocks(STsdbRepo *pRepo, int totalBlocks);
 static int         keyFGroupCompFunc(const void *key, const void *fgroup);
 static int         tsdbEncodeCfg(void **buf, STsdbCfg *pCfg);
@@ -85,10 +84,10 @@ int32_t tsdbCreateRepo(char *rootDir, STsdbCfg *pCfg) {
   if (tsdbSetRepoEnv(rootDir, pCfg) < 0) return -1;
 
   tsdbDebug(
-      "vgId:%d tsdb env create succeed! cacheBlockSize %d totalBlocks %d maxTables %d daysPerFile %d keep "
+      "vgId:%d tsdb env create succeed! cacheBlockSize %d totalBlocks %d daysPerFile %d keep "
       "%d minRowsPerFileBlock %d maxRowsPerFileBlock %d precision %d compression %d",
-      pCfg->tsdbId, pCfg->cacheBlockSize, pCfg->totalBlocks, pCfg->maxTables, pCfg->daysPerFile, pCfg->keep,
-      pCfg->minRowsPerFileBlock, pCfg->maxRowsPerFileBlock, pCfg->precision, pCfg->compression);
+      pCfg->tsdbId, pCfg->cacheBlockSize, pCfg->totalBlocks, pCfg->daysPerFile, pCfg->keep, pCfg->minRowsPerFileBlock,
+      pCfg->maxRowsPerFileBlock, pCfg->precision, pCfg->compression);
   return 0;
 }
 
@@ -307,13 +306,6 @@ int32_t tsdbConfigRepo(TSDB_REPO_T *repo, STsdbCfg *pCfg) {
     tsdbAlterCacheTotalBlocks(pRepo, pCfg->totalBlocks);
     configChanged = true;
   }
-  if (pRCfg->maxTables != pCfg->maxTables) {
-    if (tsdbAlterMaxTables(pRepo, pCfg->maxTables) < 0) {
-      tsdbError("vgId:%d failed to configure repo when alter maxTables since %s", REPO_ID(pRepo), tstrerror(terrno));
-      return -1;
-    }
-    configChanged = true;
-  }
 
   if (configChanged) {
     if (tsdbSaveConfig(pRepo->rootDir, &pRepo->config) < 0) {
@@ -385,6 +377,18 @@ char *tsdbGetDataDirName(char *rootDir) {
   return fname;
 }
 
+int tsdbGetNextMaxTables(int tid) {
+  ASSERT(tid >= 1 && tid <= TSDB_MAX_TABLES);
+  int maxTables = TSDB_INIT_NTABLES;
+  while (true) {
+    maxTables = MIN(maxTables, TSDB_MAX_TABLES);
+    if (tid <= maxTables) break;
+    maxTables *= 2;
+  }
+
+  return maxTables + 1;
+}
+
 STsdbMeta *    tsdbGetMeta(TSDB_REPO_T *pRepo) { return ((STsdbRepo *)pRepo)->tsdbMeta; }
 STsdbFileH *   tsdbGetFile(TSDB_REPO_T *pRepo) { return ((STsdbRepo *)pRepo)->tsdbFileH; }
 STsdbRepoInfo *tsdbGetStatus(TSDB_REPO_T *pRepo) { return NULL; }
@@ -417,17 +421,6 @@ static int32_t tsdbCheckAndSetDefaultCfg(STsdbCfg *pCfg) {
     goto _err;
   }
 
-  // Check maxTables
-  if (pCfg->maxTables == -1) {
-    pCfg->maxTables = TSDB_DEFAULT_TABLES+1;
-  } else {
-    if (pCfg->maxTables - 1 < TSDB_MIN_TABLES || pCfg->maxTables - 1 > TSDB_MAX_TABLES) {
-      tsdbError("vgId:%d invalid maxTables configuration! maxTables %d TSDB_MIN_TABLES %d TSDB_MAX_TABLES %d",
-                pCfg->tsdbId, pCfg->maxTables - 1, TSDB_MIN_TABLES, TSDB_MAX_TABLES);
-      goto _err;
-    }
-  }
-
   // Check daysPerFile
   if (pCfg->daysPerFile == -1) {
     pCfg->daysPerFile = TSDB_DEFAULT_DAYS_PER_FILE;
@@ -713,6 +706,7 @@ static int32_t tsdbInsertDataToTable(STsdbRepo *pRepo, SSubmitBlk *pBlock, TSKEY
   STsdbMeta *pMeta = pRepo->tsdbMeta;
   int64_t    points = 0;
 
+  ASSERT(pBlock->tid < pMeta->maxTables);
   STable *pTable = pMeta->tables[pBlock->tid];
   ASSERT(pTable != NULL && TABLE_UID(pTable) == pBlock->uid);
 
@@ -779,7 +773,6 @@ static SDataRow tsdbGetSubmitBlkNext(SSubmitBlkIter *pIter) {
 }
 
 static int tsdbRestoreInfo(STsdbRepo *pRepo) {
-  // TODO
   STsdbMeta * pMeta = pRepo->tsdbMeta;
   STsdbFileH *pFileH = pRepo->tsdbFileH;
   SFileGroup *pFGroup = NULL;
@@ -792,7 +785,7 @@ static int tsdbRestoreInfo(STsdbRepo *pRepo) {
   tsdbInitFileGroupIter(pFileH, &iter, TSDB_ORDER_DESC);
   while ((pFGroup = tsdbGetFileGroupNext(&iter)) != NULL) {
     if (tsdbSetAndOpenHelperFile(&rhelper, pFGroup) < 0) goto _err;
-    for (int i = 1; i < pRepo->config.maxTables; i++) {
+    for (int i = 1; i < pMeta->maxTables; i++) {
       STable *pTable = pMeta->tables[i];
       if (pTable == NULL) continue;
       tsdbSetHelperTable(&rhelper, pTable, pRepo);
@@ -868,36 +861,6 @@ static int tsdbAlterKeep(STsdbRepo *pRepo, int32_t keep) {
   return 0;
 }
 
-static int tsdbAlterMaxTables(STsdbRepo *pRepo, int32_t maxTables) {
-  // TODO
-  int oldMaxTables = pRepo->config.maxTables;
-  if (oldMaxTables < pRepo->config.maxTables) {
-    terrno = TSDB_CODE_TDB_INVALID_ACTION;
-    return -1;
-  }
-
-  STsdbMeta *pMeta = pRepo->tsdbMeta;
-
-  pMeta->tables = realloc(pMeta->tables, maxTables * sizeof(STable *));
-  memset(&pMeta->tables[oldMaxTables], 0, sizeof(STable *) * (maxTables - oldMaxTables));
-  pRepo->config.maxTables = maxTables;
-
-  if (pRepo->mem) {
-    pRepo->mem->tData = realloc(pRepo->mem->tData, maxTables * sizeof(STableData *));
-    memset(POINTER_SHIFT(pRepo->mem->tData, sizeof(STableData *) * oldMaxTables), 0,
-           sizeof(STableData *) * (maxTables - oldMaxTables));
-  }
-
-  if (pRepo->imem) {
-    pRepo->imem->tData = realloc(pRepo->imem->tData, maxTables * sizeof(STableData *));
-    memset(POINTER_SHIFT(pRepo->imem->tData, sizeof(STableData *) * oldMaxTables), 0,
-           sizeof(STableData *) * (maxTables - oldMaxTables));
-  }
-
-  tsdbDebug("vgId:%d, tsdb maxTables is changed from %d to %d!", pRepo->config.tsdbId, oldMaxTables, maxTables);
-  return 0;
-}
-
 static int keyFGroupCompFunc(const void *key, const void *fgroup) {
   int         fid = *(int *)key;
   SFileGroup *pFGroup = (SFileGroup *)fgroup;
@@ -914,7 +877,6 @@ static int tsdbEncodeCfg(void **buf, STsdbCfg *pCfg) {
   tlen += taosEncodeVariantI32(buf, pCfg->tsdbId);
   tlen += taosEncodeFixedI32(buf, pCfg->cacheBlockSize);
   tlen += taosEncodeVariantI32(buf, pCfg->totalBlocks);
-  tlen += taosEncodeVariantI32(buf, pCfg->maxTables);
   tlen += taosEncodeVariantI32(buf, pCfg->daysPerFile);
   tlen += taosEncodeVariantI32(buf, pCfg->keep);
   tlen += taosEncodeVariantI32(buf, pCfg->keep1);
@@ -931,7 +893,6 @@ static void *tsdbDecodeCfg(void *buf, STsdbCfg *pCfg) {
   buf = taosDecodeVariantI32(buf, &(pCfg->tsdbId));
   buf = taosDecodeFixedI32(buf, &(pCfg->cacheBlockSize));
   buf = taosDecodeVariantI32(buf, &(pCfg->totalBlocks));
-  buf = taosDecodeVariantI32(buf, &(pCfg->maxTables));
   buf = taosDecodeVariantI32(buf, &(pCfg->daysPerFile));
   buf = taosDecodeVariantI32(buf, &(pCfg->keep));
   buf = taosDecodeVariantI32(buf, &(pCfg->keep1));
@@ -1037,7 +998,7 @@ static int tsdbScanAndConvertSubmitMsg(STsdbRepo *pRepo, SSubmitMsg *pMsg) {
     pBlock->schemaLen = htonl(pBlock->schemaLen);
     pBlock->numOfRows = htons(pBlock->numOfRows);
 
-    if (pBlock->tid <= 0 || pBlock->tid >= pRepo->config.maxTables) {
+    if (pBlock->tid <= 0 || pBlock->tid >= pMeta->maxTables) {
       tsdbError("vgId:%d failed to get table to insert data, uid %" PRIu64 " tid %d", REPO_ID(pRepo), pBlock->uid,
                 pBlock->tid);
       terrno = TSDB_CODE_TDB_INVALID_TABLE_ID;
@@ -1120,7 +1081,7 @@ TSKEY tsdbGetTableLastKey(TSDB_REPO_T *repo, uint64_t uid) {
 static void tsdbStartStream(STsdbRepo *pRepo) {
   STsdbMeta *pMeta = pRepo->tsdbMeta;
 
-  for (int i = 0; i < pRepo->config.maxTables; i++) {
+  for (int i = 0; i < pMeta->maxTables; i++) {
     STable *pTable = pMeta->tables[i];
     if (pTable && pTable->type == TSDB_STREAM_TABLE) {
       pTable->cqhandle = (*pRepo->appH.cqCreateFunc)(pRepo->appH.cqH, TABLE_UID(pTable), TABLE_TID(pTable), pTable->sql,
@@ -1133,7 +1094,7 @@ static void tsdbStartStream(STsdbRepo *pRepo) {
 static void tsdbStopStream(STsdbRepo *pRepo) {
   STsdbMeta *pMeta = pRepo->tsdbMeta;
 
-  for (int i = 0; i < pRepo->config.maxTables; i++) {
+  for (int i = 0; i < pMeta->maxTables; i++) {
     STable *pTable = pMeta->tables[i];
     if (pTable && pTable->type == TSDB_STREAM_TABLE) {
       (*pRepo->appH.cqDropFunc)(pTable->cqhandle);
diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 7708646a61..a65d956eb0 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -21,7 +21,7 @@
 static FORCE_INLINE STsdbBufBlock *tsdbGetCurrBufBlock(STsdbRepo *pRepo);
 
 static void        tsdbFreeBytes(STsdbRepo *pRepo, void *ptr, int bytes);
-static SMemTable * tsdbNewMemTable(STsdbCfg *pCfg);
+static SMemTable * tsdbNewMemTable(STsdbRepo *pRepo);
 static void        tsdbFreeMemTable(SMemTable *pMemTable);
 static STableData *tsdbNewTableData(STsdbCfg *pCfg, STable *pTable);
 static void        tsdbFreeTableData(STableData *pTableData);
@@ -30,13 +30,15 @@ static void *      tsdbCommitData(void *arg);
 static int         tsdbCommitMeta(STsdbRepo *pRepo);
 static void        tsdbEndCommit(STsdbRepo *pRepo);
 static int         tsdbHasDataToCommit(SCommitIter *iters, int nIters, TSKEY minKey, TSKEY maxKey);
-static int  tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHelper *pHelper, SDataCols *pDataCols);
+static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHelper *pHelper, SDataCols *pDataCols);
 static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo);
 static void         tsdbDestroyCommitIters(SCommitIter *iters, int maxTables);
+static int          tsdbAdjustMemMaxTables(SMemTable *pMemTable, int maxTables);
 
 // ---------------- INTERNAL FUNCTIONS ----------------
 int tsdbInsertRowToMem(STsdbRepo *pRepo, SDataRow row, STable *pTable) {
   STsdbCfg *  pCfg = &pRepo->config;
+  STsdbMeta * pMeta = pRepo->tsdbMeta;
   int32_t     level = 0;
   int32_t     headSize = 0;
   TSKEY       key = dataRowKey(row);
@@ -45,7 +47,7 @@ int tsdbInsertRowToMem(STsdbRepo *pRepo, SDataRow row, STable *pTable) {
   SSkipList * pSList = NULL;
   int         bytes = 0;
 
-  if (pMemTable != NULL && pMemTable->tData[TABLE_TID(pTable)] != NULL &&
+  if (pMemTable != NULL && TABLE_TID(pTable) < pMemTable->maxTables && pMemTable->tData[TABLE_TID(pTable)] != NULL &&
       pMemTable->tData[TABLE_TID(pTable)]->uid == TABLE_UID(pTable)) {
     pTableData = pMemTable->tData[TABLE_TID(pTable)];
     pSList = pTableData->pData;
@@ -66,13 +68,20 @@ int tsdbInsertRowToMem(STsdbRepo *pRepo, SDataRow row, STable *pTable) {
   // Operations above may change pRepo->mem, retake those values
   ASSERT(pRepo->mem != NULL);
   pMemTable = pRepo->mem;
+
+  if (TABLE_TID(pTable) >= pMemTable->maxTables) {
+    if (tsdbAdjustMemMaxTables(pMemTable, pMeta->maxTables) < 0) return -1;;
+  }
   pTableData = pMemTable->tData[TABLE_TID(pTable)];
 
   if (pTableData == NULL || pTableData->uid != TABLE_UID(pTable)) {
     if (pTableData != NULL) {  // destroy the table skiplist (may have race condition problem)
+      taosWLockLatch(&(pMemTable->latch));
       pMemTable->tData[TABLE_TID(pTable)] = NULL;
       tsdbFreeTableData(pTableData);
+      taosWUnLockLatch(&(pMemTable->latch));
     }
+
     pTableData = tsdbNewTableData(pCfg, pTable);
     if (pTableData == NULL) {
       tsdbError("vgId:%d failed to insert row with key %" PRId64
@@ -122,7 +131,6 @@ int tsdbUnRefMemTable(STsdbRepo *pRepo, SMemTable *pMemTable) {
 	int ref = T_REF_DEC(pMemTable);
 	tsdbDebug("vgId:%d unref memtable %p ref %d", REPO_ID(pRepo), pMemTable, ref);
   if (ref == 0) {
-    STsdbCfg *    pCfg = &pRepo->config;
     STsdbBufPool *pBufPool = pRepo->pPool;
 
     SListNode *pNode = NULL;
@@ -139,7 +147,7 @@ int tsdbUnRefMemTable(STsdbRepo *pRepo, SMemTable *pMemTable) {
     }
     if (tsdbUnlockRepo(pRepo) < 0) return -1;
 
-    for (int i = 0; i < pCfg->maxTables; i++) {
+    for (int i = 0; i < pMemTable->maxTables; i++) {
       if (pMemTable->tData[i] != NULL) {
         tsdbFreeTableData(pMemTable->tData[i]);
       }
@@ -161,11 +169,24 @@ int tsdbTakeMemSnapshot(STsdbRepo *pRepo, SMemTable **pMem, SMemTable **pIMem) {
   tsdbRefMemTable(pRepo, *pIMem);
 
   if (tsdbUnlockRepo(pRepo) < 0) return -1;
-	tsdbDebug("vgId:%d take memory snapshot, pMem %p pIMem %p", REPO_ID(pRepo), *pMem, *pIMem);
 
+  if (*pMem != NULL) taosRLockLatch(&((*pMem)->latch));
+
+  tsdbDebug("vgId:%d take memory snapshot, pMem %p pIMem %p", REPO_ID(pRepo), *pMem, *pIMem);
   return 0;
 }
 
+void tsdbUnTakeMemSnapShot(STsdbRepo *pRepo, SMemTable *pMem, SMemTable *pIMem) {
+  if (pMem != NULL) {
+    taosRUnLockLatch(&(pMem->latch));
+    tsdbUnRefMemTable(pRepo, pMem);
+  }
+
+  if (pIMem != NULL) {
+    tsdbUnRefMemTable(pRepo, pIMem);
+  }
+}
+
 void *tsdbAllocBytes(STsdbRepo *pRepo, int bytes) {
   STsdbCfg *     pCfg = &pRepo->config;
   STsdbBufBlock *pBufBlock = tsdbGetCurrBufBlock(pRepo);
@@ -182,7 +203,7 @@ void *tsdbAllocBytes(STsdbRepo *pRepo, int bytes) {
   }
 
   if (pRepo->mem == NULL) {
-    SMemTable *pMemTable = tsdbNewMemTable(&pRepo->config);
+    SMemTable *pMemTable = tsdbNewMemTable(pRepo);
     if (pMemTable == NULL) return NULL;
 
     if (tsdbLockRepo(pRepo) < 0) {
@@ -329,7 +350,9 @@ static void tsdbFreeBytes(STsdbRepo *pRepo, void *ptr, int bytes) {
             listNEles(pRepo->mem->bufBlockList), pBufBlock->offset, pBufBlock->remain);
 }
 
-static SMemTable* tsdbNewMemTable(STsdbCfg* pCfg) {
+static SMemTable* tsdbNewMemTable(STsdbRepo *pRepo) {
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
+
   SMemTable *pMemTable = (SMemTable *)calloc(1, sizeof(*pMemTable));
   if (pMemTable == NULL) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
@@ -340,7 +363,8 @@ static SMemTable* tsdbNewMemTable(STsdbCfg* pCfg) {
   pMemTable->keyLast = 0;
   pMemTable->numOfRows = 0;
 
-  pMemTable->tData = (STableData**)calloc(pCfg->maxTables, sizeof(STableData*));
+  pMemTable->maxTables = pMeta->maxTables;
+  pMemTable->tData = (STableData **)calloc(pMemTable->maxTables, sizeof(STableData *));
   if (pMemTable->tData == NULL) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
     goto _err;
@@ -398,9 +422,6 @@ static STableData *tsdbNewTableData(STsdbCfg *pCfg, STable *pTable) {
     goto _err;
   }
 
-  // TODO: operation here should not be here, remove it
-  pTableData->pData->level = 1;
-
   return pTableData;
 
 _err:
@@ -473,7 +494,7 @@ static void *tsdbCommitData(void *arg) {
 
 _exit:
   tdFreeDataCols(pDataCols);
-  tsdbDestroyCommitIters(iters, pCfg->maxTables);
+  tsdbDestroyCommitIters(iters, pMem->maxTables);
   tsdbDestroyHelper(&whelper);
   tsdbEndCommit(pRepo);
   tsdbInfo("vgId:%d commit over", pRepo->config.tsdbId);
@@ -552,12 +573,13 @@ static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHe
   STsdbCfg *  pCfg = &pRepo->config;
   STsdbFileH *pFileH = pRepo->tsdbFileH;
   SFileGroup *pGroup = NULL;
+  SMemTable * pMem = pRepo->imem;
 
   TSKEY minKey = 0, maxKey = 0;
   tsdbGetFidKeyRange(pCfg->daysPerFile, pCfg->precision, fid, &minKey, &maxKey);
 
   // Check if there are data to commit to this file
-  int hasDataToCommit = tsdbHasDataToCommit(iters, pCfg->maxTables, minKey, maxKey);
+  int hasDataToCommit = tsdbHasDataToCommit(iters, pMem->maxTables, minKey, maxKey);
   if (!hasDataToCommit) {
     tsdbDebug("vgId:%d no data to commit to file %d", REPO_ID(pRepo), fid);
     return 0;
@@ -570,7 +592,7 @@ static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHe
     return -1;
   }
 
-  if ((pGroup = tsdbCreateFGroupIfNeed(pRepo, dataDir, fid, pCfg->maxTables)) == NULL) {
+  if ((pGroup = tsdbCreateFGroupIfNeed(pRepo, dataDir, fid)) == NULL) {
     tsdbError("vgId:%d failed to create file group %d since %s", REPO_ID(pRepo), fid, tstrerror(terrno));
     goto _err;
   }
@@ -582,7 +604,7 @@ static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHe
   }
 
   // Loop to commit data in each table
-  for (int tid = 1; tid < pCfg->maxTables; tid++) {
+  for (int tid = 1; tid < pMem->maxTables; tid++) {
     SCommitIter *pIter = iters + tid;
     if (pIter->pTable == NULL) continue;
 
@@ -643,11 +665,10 @@ _err:
 }
 
 static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo) {
-  STsdbCfg * pCfg = &(pRepo->config);
   SMemTable *pMem = pRepo->imem;
   STsdbMeta *pMeta = pRepo->tsdbMeta;
 
-  SCommitIter *iters = (SCommitIter *)calloc(pCfg->maxTables, sizeof(SCommitIter));
+  SCommitIter *iters = (SCommitIter *)calloc(pMem->maxTables, sizeof(SCommitIter));
   if (iters == NULL) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
     return NULL;
@@ -656,7 +677,7 @@ static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo) {
   if (tsdbRLockRepoMeta(pRepo) < 0) goto _err;
 
   // reference all tables
-  for (int i = 0; i < pCfg->maxTables; i++) { 
+  for (int i = 0; i < pMem->maxTables; i++) {
     if (pMeta->tables[i] != NULL) {
       tsdbRefTable(pMeta->tables[i]);
       iters[i].pTable = pMeta->tables[i];
@@ -665,7 +686,7 @@ static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo) {
 
   if (tsdbUnlockRepoMeta(pRepo) < 0) goto _err;
 
-  for (int i = 0; i < pCfg->maxTables; i++) {
+  for (int i = 0; i < pMem->maxTables; i++) {
     if ((iters[i].pTable != NULL) && (pMem->tData[i] != NULL) && (TABLE_UID(iters[i].pTable) == pMem->tData[i]->uid)) {
       if ((iters[i].pIter = tSkipListCreateIter(pMem->tData[i]->pData)) == NULL) {
         terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
@@ -679,7 +700,7 @@ static SCommitIter *tsdbCreateCommitIters(STsdbRepo *pRepo) {
   return iters;
 
 _err:
-  tsdbDestroyCommitIters(iters, pCfg->maxTables);
+  tsdbDestroyCommitIters(iters, pMem->maxTables);
   return NULL;
 }
 
@@ -694,4 +715,26 @@ static void tsdbDestroyCommitIters(SCommitIter *iters, int maxTables) {
   }
 
   free(iters);
+}
+
+static int tsdbAdjustMemMaxTables(SMemTable *pMemTable, int maxTables) {
+  ASSERT(pMemTable->maxTables < maxTables);
+
+  STableData **pTableData = (STableData **)calloc(maxTables, sizeof(STableData *));
+  if (pTableData == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    return -1;
+  }
+  memcpy((void *)pTableData, (void *)pMemTable->tData, sizeof(STableData *) * pMemTable->maxTables);
+
+  STableData **tData = pMemTable->tData;
+
+  taosWLockLatch(&(pMemTable->latch));
+  pMemTable->maxTables = maxTables;
+  pMemTable->tData = pTableData;
+  taosWUnLockLatch(&(pMemTable->latch));
+
+  tfree(tData);
+
+  return 0;
 }
\ No newline at end of file
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index b25e734694..09bbbd8f4d 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -49,6 +49,7 @@ static int     tsdbGetTableEncodeSize(int8_t act, STable *pTable);
 static void *  tsdbInsertTableAct(STsdbRepo *pRepo, int8_t act, void *buf, STable *pTable);
 static int     tsdbRemoveTableFromStore(STsdbRepo *pRepo, STable *pTable);
 static int     tsdbRmTableFromMeta(STsdbRepo *pRepo, STable *pTable);
+static int     tsdbAdjustMetaTables(STsdbRepo *pRepo, int tid);
 
 // ------------------ OUTER FUNCTIONS ------------------
 int tsdbCreateTable(TSDB_REPO_T *repo, STableCfg *pCfg) {
@@ -60,13 +61,13 @@ int tsdbCreateTable(TSDB_REPO_T *repo, STableCfg *pCfg) {
   int        tid = pCfg->tableId.tid;
   STable *   pTable = NULL;
 
-  if (tid < 0 || tid >= pRepo->config.maxTables) {
+  if (tid < 1 || tid > TSDB_MAX_TABLES) {
     tsdbError("vgId:%d failed to create table since invalid tid %d", REPO_ID(pRepo), tid);
     terrno = TSDB_CODE_TDB_IVD_CREATE_TABLE_INFO;
     goto _err;
   }
 
-  if (pMeta->tables[tid] != NULL) {
+  if (tid < pMeta->maxTables && pMeta->tables[tid] != NULL) {
     if (TABLE_UID(pMeta->tables[tid]) == pCfg->tableId.uid) {
       tsdbError("vgId:%d table %s already exists, tid %d uid %" PRId64, REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
                 TABLE_TID(pTable), TABLE_UID(pTable));
@@ -422,7 +423,8 @@ STsdbMeta *tsdbNewMeta(STsdbCfg *pCfg) {
     goto _err;
   }
 
-  pMeta->tables = (STable **)calloc(pCfg->maxTables, sizeof(STable *));
+  pMeta->maxTables = TSDB_INIT_NTABLES + 1;
+  pMeta->tables = (STable **)calloc(pMeta->maxTables, sizeof(STable *));
   if (pMeta->tables == NULL) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
     goto _err;
@@ -434,7 +436,7 @@ STsdbMeta *tsdbNewMeta(STsdbCfg *pCfg) {
     goto _err;
   }
 
-  pMeta->uidMap = taosHashInit(pCfg->maxTables, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false);
+  pMeta->uidMap = taosHashInit(TSDB_INIT_NTABLES * 1.1, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false);
   if (pMeta->uidMap == NULL) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
     goto _err;
@@ -484,14 +486,13 @@ _err:
 }
 
 int tsdbCloseMeta(STsdbRepo *pRepo) {
-  STsdbCfg * pCfg = &pRepo->config;
   STsdbMeta *pMeta = pRepo->tsdbMeta;
   SListNode *pNode = NULL;
   STable *   pTable = NULL;
 
   if (pMeta == NULL) return 0;
   tdCloseKVStore(pMeta->pStore);
-  for (int i = 1; i < pCfg->maxTables; i++) {
+  for (int i = 1; i < pMeta->maxTables; i++) {
     tsdbFreeTable(pMeta->tables[i]);
   }
 
@@ -624,9 +625,8 @@ static int tsdbRestoreTable(void *pHandle, void *cont, int contLen) {
 static void tsdbOrgMeta(void *pHandle) {
   STsdbRepo *pRepo = (STsdbRepo *)pHandle;
   STsdbMeta *pMeta = pRepo->tsdbMeta;
-  STsdbCfg * pCfg = &pRepo->config;
 
-  for (int i = 1; i < pCfg->maxTables; i++) {
+  for (int i = 1; i < pMeta->maxTables; i++) {
     STable *pTable = pMeta->tables[i];
     if (pTable != NULL && pTable->type == TSDB_CHILD_TABLE) {
       tsdbAddTableIntoIndex(pMeta, pTable, true);
@@ -781,6 +781,9 @@ static int tsdbAddTableToMeta(STsdbRepo *pRepo, STable *pTable, bool addIdx, boo
       goto _err;
     }
   } else {
+    if (TABLE_TID(pTable) >= pMeta->maxTables) {
+      if (tsdbAdjustMetaTables(pRepo, TABLE_TID(pTable)) < 0) goto _err;
+    }
     if (TABLE_TYPE(pTable) == TSDB_CHILD_TABLE && addIdx) {  // add STABLE to the index
       if (tsdbAddTableIntoIndex(pMeta, pTable, true) < 0) {
         tsdbDebug("vgId:%d failed to add table %s to meta while add table to index since %s", REPO_ID(pRepo),
@@ -788,6 +791,7 @@ static int tsdbAddTableToMeta(STsdbRepo *pRepo, STable *pTable, bool addIdx, boo
         goto _err;
       }
     }
+    ASSERT(TABLE_TID(pTable) < pMeta->maxTables);
     pMeta->tables[TABLE_TID(pTable)] = pTable;
     pMeta->nTables++;
   }
@@ -827,7 +831,6 @@ static void tsdbRemoveTableFromMeta(STsdbRepo *pRepo, STable *pTable, bool rmFro
   SListIter  lIter = {0};
   SListNode *pNode = NULL;
   STable *   tTable = NULL;
-  STsdbCfg * pCfg = &(pRepo->config);
 
   STSchema *pSchema = tsdbGetTableSchemaImpl(pTable, false, false, -1);
   int       maxCols = schemaNCols(pSchema);
@@ -860,7 +863,7 @@ static void tsdbRemoveTableFromMeta(STsdbRepo *pRepo, STable *pTable, bool rmFro
   if (maxCols == pMeta->maxCols || maxRowBytes == pMeta->maxRowBytes) {
     maxCols = 0;
     maxRowBytes = 0;
-    for (int i = 0; i < pCfg->maxTables; i++) {
+    for (int i = 0; i < pMeta->maxTables; i++) {
       STable *pTable = pMeta->tables[i];
       if (pTable != NULL) {
         pSchema = tsdbGetTableSchemaImpl(pTable, false, false, -1);
@@ -1215,7 +1218,9 @@ static void *tsdbInsertTableAct(STsdbRepo *pRepo, int8_t act, void *buf, STable
 static int tsdbRemoveTableFromStore(STsdbRepo *pRepo, STable *pTable) {
   int   tlen = tsdbGetTableEncodeSize(TSDB_DROP_META, pTable);
   void *buf = tsdbAllocBytes(pRepo, tlen);
-  ASSERT(buf != NULL);
+  if (buf == NULL) {
+    return -1;
+  }
 
   void *pBuf = buf;
   if (TABLE_TYPE(pTable) == TSDB_SUPER_TABLE) {
@@ -1266,5 +1271,28 @@ static int tsdbRmTableFromMeta(STsdbRepo *pRepo, STable *pTable) {
     tsdbRemoveTableFromMeta(pRepo, pTable, true, true);
   }
 
+  return 0;
+}
+
+static int tsdbAdjustMetaTables(STsdbRepo *pRepo, int tid) {
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
+  ASSERT(tid >= pMeta->maxTables);
+
+  int maxTables = tsdbGetNextMaxTables(tid);
+
+  STable **tables = (STable **)calloc(maxTables, sizeof(STable *));
+  if (tables == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  memcpy((void *)tables, (void *)pMeta->tables, sizeof(STable *) * pMeta->maxTables);
+  pMeta->maxTables = maxTables;
+
+  STable **tTables = pMeta->tables;
+  pMeta->tables = tables;
+  tfree(tTables);
+  tsdbDebug("vgId:%d tsdb meta maxTables is adjusted as %d", REPO_ID(pRepo), maxTables);
+
   return 0;
 }
\ No newline at end of file
diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index 3063f22a28..263e1ea3d5 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -147,6 +147,7 @@ int tsdbSetAndOpenHelperFile(SRWHelper *pHelper, SFileGroup *pGroup) {
       if (tsdbOpenFile(pFile, O_WRONLY | O_CREAT) < 0) goto _err;
       pFile->info.size = TSDB_FILE_HEAD_SIZE;
       pFile->info.magic = TSDB_FILE_INIT_MAGIC;
+      pFile->info.len = 0;
       if (tsdbUpdateFileHeader(pFile, 0) < 0) return -1;
     }
   } else {
@@ -302,6 +303,10 @@ void tsdbSetHelperTable(SRWHelper *pHelper, STable *pTable, STsdbRepo *pRepo) {
     memset(&(pHelper->curCompIdx), 0, sizeof(SCompIdx));
   }
 
+  if (helperType(pHelper) == TSDB_WRITE_HELPER && pHelper->curCompIdx.hasLast) {
+    pHelper->hasOldLastBlock = true;
+  }
+
   helperSetState(pHelper, TSDB_HELPER_TABLE_SET);
   ASSERT(pHelper->state == ((TSDB_HELPER_TABLE_SET << 1) - 1));
 }
@@ -555,10 +560,6 @@ int tsdbLoadCompIdx(SRWHelper *pHelper, void *target) {
   }
   helperSetState(pHelper, TSDB_HELPER_IDX_LOAD);
 
-  if (helperType(pHelper) == TSDB_WRITE_HELPER) {
-    pFile->info.len = 0;
-  }
-
   // Copy the memory for outside usage
   if (target && pHelper->idxH.numOfIdx > 0)
     memcpy(target, pHelper->idxH.pIdxArray, sizeof(SCompIdx) * pHelper->idxH.numOfIdx);
@@ -1231,8 +1232,8 @@ static int tsdbLoadColData(SRWHelper *pHelper, SFile *pFile, SCompBlock *pCompBl
   if (tsdbCheckAndDecodeColumnData(pDataCol, pHelper->pBuffer, pCompCol->len, pCompBlock->algorithm,
                                    pCompBlock->numOfRows, pHelper->pRepo->config.maxRowsPerFileBlock,
                                    pHelper->compBuffer, tsizeof(pHelper->compBuffer)) < 0) {
-    tsdbError("vgId:%d file %s is broken at column %d offset %" PRId64, REPO_ID(pHelper->pRepo), pFile->fname, pCompCol->colId,
-              (int64_t)pCompCol->offset);
+    tsdbError("vgId:%d file %s is broken at column %d offset %" PRId64, REPO_ID(pHelper->pRepo), pFile->fname,
+              pCompCol->colId, offset);
     return -1;
   }
 
@@ -1517,8 +1518,8 @@ static int tsdbProcessMergeCommit(SRWHelper *pHelper, SCommitIter *pCommitIter,
     if (rows2 == 0) {  // all data filtered out
       *(pCommitIter->pIter) = slIter;
     } else {
-      if (rows1 + rows2 < pCfg->minRowsPerFileBlock && pCompBlock->numOfSubBlocks < TSDB_MAX_SUBBLOCKS &&
-          !TSDB_NLAST_FILE_OPENED(pHelper)) {
+      if (pCompBlock->numOfRows + rows2 < pCfg->minRowsPerFileBlock &&
+          pCompBlock->numOfSubBlocks < TSDB_MAX_SUBBLOCKS && !TSDB_NLAST_FILE_OPENED(pHelper)) {
         tdResetDataCols(pDataCols);
         int rowsRead = tsdbLoadDataFromCache(pTable, pCommitIter->pIter, maxKey, rows1, pDataCols,
                                              pDataCols0->cols[0].pData, pDataCols0->numOfRows);
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index c82d1f905a..c0f6c82b99 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -175,6 +175,9 @@ static SArray* getDefaultLoadColumns(STsdbQueryHandle* pQueryHandle, bool loadTS
 
 TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STableGroupInfo* groupList, void* qinfo) {
   STsdbQueryHandle* pQueryHandle = calloc(1, sizeof(STsdbQueryHandle));
+  if (pQueryHandle == NULL) {
+    goto out_of_memory;
+  }
   pQueryHandle->order       = pCond->order;
   pQueryHandle->window      = pCond->twindow;
   pQueryHandle->pTsdb       = tsdb;
@@ -260,8 +263,8 @@ TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STab
   return (TsdbQueryHandleT) pQueryHandle;
 
 out_of_memory:
-  terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
   tsdbCleanupQueryHandle(pQueryHandle);
+  terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
   return NULL;
 }
 
@@ -317,17 +320,20 @@ static bool initTableMemIterator(STsdbQueryHandle* pHandle, STableCheckInfo* pCh
   }
   
   assert(pCheckInfo->iter == NULL && pCheckInfo->iiter == NULL);
-  
-  if (pHandle->mem && pHandle->mem->tData[pCheckInfo->tableId.tid] != NULL) {
+
+  // TODO: add uid check
+  if (pHandle->mem && pCheckInfo->tableId.tid < pHandle->mem->maxTables &&
+      pHandle->mem->tData[pCheckInfo->tableId.tid] != NULL) {
     pCheckInfo->iter = tSkipListCreateIterFromVal(pHandle->mem->tData[pCheckInfo->tableId.tid]->pData,
-        (const char*) &pCheckInfo->lastKey, TSDB_DATA_TYPE_TIMESTAMP, order);
+                                                  (const char*)&pCheckInfo->lastKey, TSDB_DATA_TYPE_TIMESTAMP, order);
   }
-  
-  if (pHandle->imem && pHandle->imem->tData[pCheckInfo->tableId.tid] != NULL) {
+
+  if (pHandle->imem && pCheckInfo->tableId.tid < pHandle->imem->maxTables &&
+      pHandle->imem->tData[pCheckInfo->tableId.tid] != NULL) {
     pCheckInfo->iiter = tSkipListCreateIterFromVal(pHandle->imem->tData[pCheckInfo->tableId.tid]->pData,
-        (const char*) &pCheckInfo->lastKey, TSDB_DATA_TYPE_TIMESTAMP, order);
+                                                   (const char*)&pCheckInfo->lastKey, TSDB_DATA_TYPE_TIMESTAMP, order);
   }
-  
+
   // both iterators are NULL, no data in buffer right now
   if (pCheckInfo->iter == NULL && pCheckInfo->iiter == NULL) {
     return false;
@@ -1529,7 +1535,6 @@ static int32_t getDataBlocksInFiles(STsdbQueryHandle* pQueryHandle, bool* exists
 
 static bool doHasDataInBuffer(STsdbQueryHandle* pQueryHandle) {
   size_t numOfTables = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
-  assert(numOfTables <= ((STsdbRepo*)pQueryHandle->pTsdb)->config.maxTables);
   
   while (pQueryHandle->activeIndex < numOfTables) {
     if (hasMoreDataInCache(pQueryHandle)) {
@@ -2418,8 +2423,7 @@ void tsdbCleanupQueryHandle(TsdbQueryHandleT queryHandle) {
   tfree(pQueryHandle->statis);
 
   // todo check error
-  tsdbUnRefMemTable(pQueryHandle->pTsdb, pQueryHandle->mem);
-  tsdbUnRefMemTable(pQueryHandle->pTsdb, pQueryHandle->imem);
+  tsdbUnTakeMemSnapShot(pQueryHandle->pTsdb, pQueryHandle->mem, pQueryHandle->imem);
 
   tsdbDestroyHelper(&pQueryHandle->rhelper);
 
diff --git a/src/tsdb/tests/tsdbTests.cpp b/src/tsdb/tests/tsdbTests.cpp
index 88bd524c20..5e678a8ee5 100644
--- a/src/tsdb/tests/tsdbTests.cpp
+++ b/src/tsdb/tests/tsdbTests.cpp
@@ -98,7 +98,7 @@ static void tsdbSetCfg(STsdbCfg *pCfg, int32_t tsdbId, int32_t cacheBlockSize, i
   pCfg->tsdbId = tsdbId;
   pCfg->cacheBlockSize = cacheBlockSize;
   pCfg->totalBlocks = totalBlocks;
-  pCfg->maxTables = maxTables;
+  // pCfg->maxTables = maxTables;
   pCfg->daysPerFile = daysPerFile;
   pCfg->keep = keep;
   pCfg->minRowsPerFileBlock = minRows;
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 249fb428e7..dd5ec18439 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -123,7 +123,7 @@ int32_t vnodeCreate(SMDCreateVnodeMsg *pVnodeCfg) {
   tsdbCfg.tsdbId              = pVnodeCfg->cfg.vgId;
   tsdbCfg.cacheBlockSize      = pVnodeCfg->cfg.cacheBlockSize;
   tsdbCfg.totalBlocks         = pVnodeCfg->cfg.totalBlocks;
-  tsdbCfg.maxTables           = pVnodeCfg->cfg.maxTables;
+  // tsdbCfg.maxTables           = pVnodeCfg->cfg.maxTables;
   tsdbCfg.daysPerFile         = pVnodeCfg->cfg.daysPerFile;
   tsdbCfg.keep                = pVnodeCfg->cfg.daysToKeep;
   tsdbCfg.minRowsPerFileBlock = pVnodeCfg->cfg.minRowsPerFileBlock;
@@ -630,14 +630,14 @@ static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg) {
   len += snprintf(content + len, maxLen - len, "  \"cfgVersion\": %d,\n", pVnodeCfg->cfg.cfgVersion);
   len += snprintf(content + len, maxLen - len, "  \"cacheBlockSize\": %d,\n", pVnodeCfg->cfg.cacheBlockSize);
   len += snprintf(content + len, maxLen - len, "  \"totalBlocks\": %d,\n", pVnodeCfg->cfg.totalBlocks);
-  len += snprintf(content + len, maxLen - len, "  \"maxTables\": %d,\n", pVnodeCfg->cfg.maxTables);
+  // len += snprintf(content + len, maxLen - len, "  \"maxTables\": %d,\n", pVnodeCfg->cfg.maxTables);
   len += snprintf(content + len, maxLen - len, "  \"daysPerFile\": %d,\n", pVnodeCfg->cfg.daysPerFile);
   len += snprintf(content + len, maxLen - len, "  \"daysToKeep\": %d,\n", pVnodeCfg->cfg.daysToKeep);
   len += snprintf(content + len, maxLen - len, "  \"daysToKeep1\": %d,\n", pVnodeCfg->cfg.daysToKeep1);
   len += snprintf(content + len, maxLen - len, "  \"daysToKeep2\": %d,\n", pVnodeCfg->cfg.daysToKeep2);
   len += snprintf(content + len, maxLen - len, "  \"minRowsPerFileBlock\": %d,\n", pVnodeCfg->cfg.minRowsPerFileBlock);
   len += snprintf(content + len, maxLen - len, "  \"maxRowsPerFileBlock\": %d,\n", pVnodeCfg->cfg.maxRowsPerFileBlock);
-  len += snprintf(content + len, maxLen - len, "  \"commitTime\": %d,\n", pVnodeCfg->cfg.commitTime);
+  // len += snprintf(content + len, maxLen - len, "  \"commitTime\": %d,\n", pVnodeCfg->cfg.commitTime);
   len += snprintf(content + len, maxLen - len, "  \"precision\": %d,\n", pVnodeCfg->cfg.precision);
   len += snprintf(content + len, maxLen - len, "  \"compression\": %d,\n", pVnodeCfg->cfg.compression);
   len += snprintf(content + len, maxLen - len, "  \"walLevel\": %d,\n", pVnodeCfg->cfg.walLevel);
@@ -729,12 +729,12 @@ static int32_t vnodeReadCfg(SVnodeObj *pVnode) {
   }
   pVnode->tsdbCfg.totalBlocks = totalBlocks->valueint;
 
-  cJSON *maxTables = cJSON_GetObjectItem(root, "maxTables");
-  if (!maxTables || maxTables->type != cJSON_Number) {
-    vError("vgId:%d, failed to read vnode cfg, maxTables not found", pVnode->vgId);
-    goto PARSE_OVER;
-  }
-  pVnode->tsdbCfg.maxTables = maxTables->valueint;
+  // cJSON *maxTables = cJSON_GetObjectItem(root, "maxTables");
+  // if (!maxTables || maxTables->type != cJSON_Number) {
+  //   vError("vgId:%d, failed to read vnode cfg, maxTables not found", pVnode->vgId);
+  //   goto PARSE_OVER;
+  // }
+  // pVnode->tsdbCfg.maxTables = maxTables->valueint;
 
   cJSON *daysPerFile = cJSON_GetObjectItem(root, "daysPerFile");
   if (!daysPerFile || daysPerFile->type != cJSON_Number) {
@@ -778,12 +778,12 @@ static int32_t vnodeReadCfg(SVnodeObj *pVnode) {
   }
   pVnode->tsdbCfg.maxRowsPerFileBlock = maxRowsPerFileBlock->valueint;
 
-  cJSON *commitTime = cJSON_GetObjectItem(root, "commitTime");
-  if (!commitTime || commitTime->type != cJSON_Number) {
-    vError("vgId:%d, failed to read vnode cfg, commitTime not found", pVnode->vgId);
-    goto PARSE_OVER;
-  }
-  pVnode->tsdbCfg.commitTime = (int8_t)commitTime->valueint;
+  // cJSON *commitTime = cJSON_GetObjectItem(root, "commitTime");
+  // if (!commitTime || commitTime->type != cJSON_Number) {
+  //   vError("vgId:%d, failed to read vnode cfg, commitTime not found", pVnode->vgId);
+  //   goto PARSE_OVER;
+  // }
+  // pVnode->tsdbCfg.commitTime = (int8_t)commitTime->valueint;
 
   cJSON *precision = cJSON_GetObjectItem(root, "precision");
   if (!precision || precision->type != cJSON_Number) {
diff --git a/tests/perftest-scripts/cassandraTestWriteLoop.sh b/tests/perftest-scripts/cassandraTestWriteLoop.sh
new file mode 100755
index 0000000000..4e42c4b3df
--- /dev/null
+++ b/tests/perftest-scripts/cassandraTestWriteLoop.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+DATA_DIR=/mnt/root/testdata
+NUM_LOOP=1
+NUM_OF_FILES=100
+OUT_FILE=cassandraWrite.out
+
+rowsPerRequest=(1 10 50 100 500 1000 2000)
+
+function printTo {
+  if $verbose ; then
+    echo $1
+  fi
+}
+
+function runTest {
+  for c in `seq 1 $clients`; do
+    avgRPR[$c]=0
+  done
+
+  printf "R/R, "
+  for c in `seq 1 $clients`; do
+    if [ "$c" == "1" ]; then
+      printf "$c client, "
+    else
+      printf "$c clients, "
+    fi
+  done
+  printf "\n"
+
+  for r in ${rowsPerRequest[@]}; do
+    printf "$r, "
+    for c in `seq 1 $clients`; do
+      totalRPR=0
+      for i in `seq 1 $NUM_LOOP`; do
+        printTo "loop i:$i, java -jar $CAS_TEST_DIR/cassandratest/target/cassandratest-1.0-SNAPSHOT-jar-with-dependencies.jar \
+            -datadir $DATA_DIR \
+            -numofFiles $NUM_OF_FILES \
+            -rowsperrequest $r \
+            -writeclients $c \
+            -conf $CAS_TEST_DIR/application.conf"
+        java -jar $CAS_TEST_DIR/cassandratest/target/cassandratest-1.0-SNAPSHOT-jar-with-dependencies.jar \
+            -datadir $DATA_DIR \
+            -numofFiles $NUM_OF_FILES \
+            -rowsperrequest $r \
+            -writeclients $c \
+            -conf $CAS_TEST_DIR/application.conf \
+            2>&1 > $OUT_FILE
+        RPR=`cat $OUT_FILE | grep "insertation speed:" | awk '{print $(NF-1)}'`
+        totalRPR=`echo "scale=4; $totalRPR + $RPR" | bc`
+        printTo "rows:$r, clients:$c, i:$i RPR:$RPR"
+      done
+      avgRPR[$c]=`echo "scale=4; $totalRPR / $NUM_LOOP" | bc`
+    done
+    for c in `seq 1 $clients`; do
+      printf "${avgRPR[$c]}, "
+    done
+    printf "\n"
+  done
+}
+
+################ Main ################
+
+verbose=false
+clients=1
+
+while : ; do
+  case $1 in
+    -v)
+      verbose=true
+      shift ;;
+
+    -c)
+      clients=$2
+      shift 2;;
+    *)
+      break ;;
+  esac
+done
+
+printTo "Cassandra Test begin.."
+
+WORK_DIR=/mnt/root/TDengine
+CAS_TEST_DIR=$WORK_DIR/tests/comparisonTest/cassandra
+
+runTest
+
+printTo "Cassandra Test done!"
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index 904e712fa4..cbe82b2c8c 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -162,6 +162,7 @@ python3 ./test.py -f client/client.py
 # Misc
 python3 testCompress.py
 python3 testNoCompress.py
+python3 testMinTablesPerVnode.py
 
 # functions
 python3 ./test.py -f functions/function_avg.py
@@ -180,4 +181,4 @@ python3 ./test.py -f functions/function_spread.py
 python3 ./test.py -f functions/function_stddev.py
 python3 ./test.py -f functions/function_sum.py
 python3 ./test.py -f functions/function_top.py
-python3 ./test.py -f functions/function_twa.py
\ No newline at end of file
+python3 ./test.py -f functions/function_twa.py
diff --git a/tests/pytest/subscribe/__init__.py b/tests/pytest/subscribe/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/pytest/subscribe/singlemeter.py b/tests/pytest/subscribe/singlemeter.py
new file mode 100644
index 0000000000..879e0a75eb
--- /dev/null
+++ b/tests/pytest/subscribe/singlemeter.py
@@ -0,0 +1,79 @@
+###################################################################
+ #		   Copyright (c) 2020 by TAOS Technologies, Inc.
+ #				     All rights reserved.
+ #
+ #  This file is proprietary and confidential to TAOS Technologies.
+ #  No part of this file may be reproduced, stored, transmitted, 
+ #  disclosed or used in any form or by any means other than as 
+ #  expressly provided by the written permission from Jianhui Tao
+ #
+###################################################################
+
+# -*- coding: utf-8 -*-  
+
+import sys
+import taos
+import time
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.sub import *
+
+class TDTestCase:
+	def init(self, conn, logSql):
+		tdLog.debug("start to execute %s" % __file__)
+		tdSql.init(conn.cursor(), logSql)
+		self.conn = conn
+
+	def run(self):
+		sqlstr = "select * from t0"
+		topic = "test"
+		now = int(time.time() * 1000)
+		tdSql.prepare()
+
+		tdLog.info("create a table and insert 10 rows.")
+		tdSql.execute("create table t0(ts timestamp, a int, b int);")
+		for i in range(0, 10):
+			tdSql.execute("insert into t0 values (%d, %d, %d);" % (now + i, i, i))
+
+		tdLog.info("consumption 01.")
+		tdSub.init(self.conn.subscribe(True, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(10)
+
+		tdLog.info("consumption 02: no new rows inserted")
+		tdSub.consume()
+		tdSub.checkRows(0)
+
+		tdLog.info("consumption 03: after one new rows inserted")
+		tdSql.execute("insert into t0 values (%d, 10, 10);" % (now + 10))
+		tdSub.consume()
+		tdSub.checkRows(1)
+
+		tdLog.info("consumption 04: keep progress and continue previous subscription")
+		tdSub.close(True)
+		tdSub.init(self.conn.subscribe(False, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(0)
+
+		tdLog.info("consumption 05: remove progress and continue previous subscription")
+		tdSub.close(False)
+		tdSub.init(self.conn.subscribe(False, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(11)
+
+		tdLog.info("consumption 06: keep progress and restart the subscription")
+		tdSub.close(True)
+		tdSub.init(self.conn.subscribe(True, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(11)
+
+		tdSub.close(True)
+
+	def stop(self):
+		tdSub.close(False)
+		tdSql.close()
+		tdLog.success("%s successfully executed" % __file__)
+	
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/subscribe/supertable.py b/tests/pytest/subscribe/supertable.py
new file mode 100644
index 0000000000..c6cc2969aa
--- /dev/null
+++ b/tests/pytest/subscribe/supertable.py
@@ -0,0 +1,114 @@
+###################################################################
+ #		   Copyright (c) 2020 by TAOS Technologies, Inc.
+ #				     All rights reserved.
+ #
+ #  This file is proprietary and confidential to TAOS Technologies.
+ #  No part of this file may be reproduced, stored, transmitted, 
+ #  disclosed or used in any form or by any means other than as 
+ #  expressly provided by the written permission from Jianhui Tao
+ #
+###################################################################
+
+# -*- coding: utf-8 -*-  
+
+import sys
+import taos
+import time
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.sub import *
+
+class TDTestCase:
+	def init(self, conn, logSql):
+		tdLog.debug("start to execute %s" % __file__)
+		tdSql.init(conn.cursor(), logSql)
+		self.conn = conn
+
+	def run(self):
+		sqlstr = "select * from meters"
+		topic = "test"
+		now = int(time.time() * 1000)
+		tdSql.prepare()
+
+		tdLog.info("create a super table and 10 sub-tables, then insert 5 rows into each sub-table.")
+		tdSql.execute("create table meters(ts timestamp, a int, b int) tags(area int, loc binary(20));")
+		for i in range(0, 10):
+			for j in range(0, 5):
+				tdSql.execute("insert into t%d using meters tags(%d, 'area%d') values (%d, %d, %d);" % (i, i, i, now + j, j, j))
+
+		tdLog.info("consumption 01.")
+		tdSub.init(self.conn.subscribe(True, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(50)
+
+		tdLog.info("consumption 02: no new rows inserted")
+		tdSub.consume()
+		tdSub.checkRows(0)
+
+		tdLog.info("consumption 03: after one new rows inserted")
+		tdSql.execute("insert into t0 values (%d, 10, 10);" % (now + 10))
+		tdSub.consume()
+		tdSub.checkRows(1)
+
+		tdLog.info("consumption 04: keep progress and continue previous subscription")
+		tdSub.close(True)
+		tdSub.init(self.conn.subscribe(False, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(0)
+
+		tdLog.info("consumption 05: remove progress and continue previous subscription")
+		tdSub.close(False)
+		tdSub.init(self.conn.subscribe(False, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(51)
+
+		tdLog.info("consumption 06: keep progress and restart the subscription")
+		tdSub.close(True)
+		tdSub.init(self.conn.subscribe(True, topic, sqlstr, 0))
+		tdSub.consume()
+		tdSub.checkRows(51)
+
+		tdLog.info("consumption 07: insert one row to two table then remove one table")
+		tdSql.execute("insert into t0 values (%d, 11, 11);" % (now + 11))
+		tdSql.execute("insert into t1 values (%d, 11, 11);" % (now + 11))
+		tdSql.execute("drop table t0")
+		tdSub.consume()
+		tdSub.checkRows(1)
+
+		tdLog.info("consumption 08: check timestamp criteria")
+		tdSub.close(False)
+		tdSub.init(self.conn.subscribe(True, topic, sqlstr + " where ts > %d" % now, 0))
+		tdSub.consume()
+		tdSub.checkRows(37)
+
+		tdLog.info("consumption 09: insert large timestamp to t2 then insert smaller timestamp to t1")
+		tdSql.execute("insert into t2 values (%d, 100, 100);" % (now + 100))
+		tdSub.consume()
+		tdSub.checkRows(1)
+		tdSql.execute("insert into t1 values (%d, 12, 12);" % (now + 12))
+		tdSub.consume()
+		tdSub.checkRows(1)
+
+		tdLog.info("consumption 10: field criteria")
+		tdSub.close(True)
+		tdSub.init(self.conn.subscribe(False, topic, sqlstr + " where a > 100", 0))
+		tdSql.execute("insert into t2 values (%d, 101, 100);" % (now + 101))
+		tdSql.execute("insert into t2 values (%d, 100, 100);" % (now + 102))
+		tdSql.execute("insert into t2 values (%d, 102, 100);" % (now + 103))
+		tdSub.consume()
+		tdSub.checkRows(2)
+
+		tdLog.info("consumption 11: two vnodes")
+		tdSql.execute("insert into t2 values (%d, 102, 100);" % (now + 104))
+		tdSql.execute("insert into t9 values (%d, 102, 100);" % (now + 104))
+		tdSub.consume()
+		tdSub.checkRows(2)
+
+	def stop(self):
+		tdSub.close(False)
+		tdSql.close()
+		tdLog.success("%s successfully executed" % __file__)
+	
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/test.sh b/tests/pytest/test.sh
new file mode 100755
index 0000000000..fbb9ba9879
--- /dev/null
+++ b/tests/pytest/test.sh
@@ -0,0 +1,23 @@
+EXEC_DIR=`dirname "$0"`
+if [[ $EXEC_DIR != "." ]]
+then
+    echo "ERROR: Please execute `basename "$0"` in its own directory (for now anyway, pardon the dust)"
+    exit -1
+fi
+CURR_DIR=`pwd`
+IN_TDINTERNAL="community"
+if [[ "$CURR_DIR" == *"$IN_TDINTERNAL"* ]]; then
+  TAOS_DIR=$CURR_DIR/../../..
+else
+  TAOS_DIR=$CURR_DIR/../..
+fi
+TAOSD_DIR=`find $TAOS_DIR -name "taosd"|grep bin|head -n1`
+LIB_DIR=`echo $TAOSD_DIR|rev|cut -d '/' -f 3,4,5,6|rev`/lib
+export PYTHONPATH=$(pwd)/../../src/connector/python/linux/python3
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIB_DIR
+
+if [[ "$1" == *"test.py"* ]]; then
+  python3 ./test.py $@
+else
+  python3 $1 $@
+fi
diff --git a/tests/pytest/testMinTablesPerVnode.py b/tests/pytest/testMinTablesPerVnode.py
new file mode 100644
index 0000000000..91cea833e7
--- /dev/null
+++ b/tests/pytest/testMinTablesPerVnode.py
@@ -0,0 +1,131 @@
+#!/usr/bin/python
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+# install pip
+# pip install src/connector/python/linux/python2/
+
+# -*- coding: utf-8 -*-
+import sys
+import getopt
+import subprocess
+from distutils.log import warn as printf
+
+from util.log import *
+from util.dnodes import *
+from util.cases import *
+from util.sql import *
+
+import taos
+
+
+if __name__ == "__main__":
+    fileName = "all"
+    deployPath = ""
+    testCluster = False
+    valgrind = 0
+    logSql = True
+    stop = 0
+    opts, args = getopt.gnu_getopt(sys.argv[1:], 'l:sgh', [
+        'logSql', 'stop', 'valgrind', 'help'])
+    for key, value in opts:
+        if key in ['-h', '--help']:
+            tdLog.printNoPrefix(
+                'A collection of test cases written using Python')
+            tdLog.printNoPrefix('-l <True:False> logSql Flag')
+            tdLog.printNoPrefix('-s stop All dnodes')
+            tdLog.printNoPrefix('-g valgrind Test Flag')
+            sys.exit(0)
+
+        if key in ['-l', '--logSql']:
+            if (value.upper() == "TRUE"):
+                logSql = True
+            elif (value.upper() == "FALSE"):
+                logSql = False
+            else:
+                tdLog.printNoPrefix("logSql value %s is invalid" % logSql)
+                sys.exit(0)
+
+        if key in ['-g', '--valgrind']:
+            valgrind = 1
+
+        if key in ['-s', '--stop']:
+            stop = 1
+
+    if (stop != 0):
+        if (valgrind == 0):
+            toBeKilled = "taosd"
+        else:
+            toBeKilled = "valgrind.bin"
+
+        killCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}' | xargs kill -HUP > /dev/null 2>&1" % toBeKilled
+
+        psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
+        processID = subprocess.check_output(psCmd, shell=True)
+
+        while(processID):
+            os.system(killCmd)
+            time.sleep(1)
+            processID = subprocess.check_output(psCmd, shell=True)
+
+        for port in range(6030, 6041):
+            usePortPID = "lsof -i tcp:%d | grep LISTEn | awk '{print $2}'" % port
+            processID = subprocess.check_output(usePortPID, shell=True)
+
+            if processID:
+                killCmd = "kill -TERM %s" % processID
+                os.system(killCmd)
+            fuserCmd = "fuser -k -n tcp %d" % port
+            os.system(fuserCmd)
+        if valgrind:
+            time.sleep(2)
+
+        tdLog.info('stop All dnodes')
+        sys.exit(0)
+
+    tdDnodes.init(deployPath)
+    tdDnodes.setTestCluster(testCluster)
+    tdDnodes.setValgrind(valgrind)
+
+    tdDnodes.stopAll()
+    tdDnodes.addSimExtraCfg("minTablesPerVnode", "100")
+    tdDnodes.deploy(1)
+    tdDnodes.start(1)
+
+    host = '127.0.0.1'
+
+    tdLog.info("Procedures for tdengine deployed in %s" % (host))
+
+    tdCases.logSql(logSql)
+
+    conn = taos.connect(
+        host,
+        config=tdDnodes.getSimCfgPath())
+
+    tdSql.init(conn.cursor(), True)
+
+    tdSql.execute("DROP DATABASE IF EXISTS db")
+    tdSql.execute("CREATE DATABASE IF NOT EXISTS db")
+    tdSql.execute("USE db")
+
+    for i in range(0, 100):
+        tdSql.execute(
+            "CREATE TABLE IF NOT EXISTS tb%d (ts TIMESTAMP, temperature INT, humidity FLOAT)" % i)
+
+    for i in range(1, 6):
+        tdSql.execute("INSERT INTO tb99 values (now + %da, %d, %f)" % (i, i, i * 1.0))
+
+    tdSql.execute("DROP TABLE tb99")
+    tdSql.execute(
+            "CREATE TABLE IF NOT EXISTS tb99 (ts TIMESTAMP, temperature INT, humidity FLOAT)")
+    tdSql.query("SELECT * FROM tb99")
+    tdSql.checkRows(0)
+    
+    conn.close()
diff --git a/tests/pytest/util/sub.py b/tests/pytest/util/sub.py
new file mode 100644
index 0000000000..2e3c2a96b7
--- /dev/null
+++ b/tests/pytest/util/sub.py
@@ -0,0 +1,43 @@
+###################################################################
+ #           Copyright (c) 2020 by TAOS Technologies, Inc.
+ #                     All rights reserved.
+ #
+ #  This file is proprietary and confidential to TAOS Technologies.
+ #  No part of this file may be reproduced, stored, transmitted, 
+ #  disclosed or used in any form or by any means other than as 
+ #  expressly provided by the written permission from Jianhui Tao
+ #
+###################################################################
+
+# -*- coding: utf-8 -*-  
+
+import sys
+import os
+import time
+import datetime
+from util.log import *
+
+class TDSub:
+	def __init__(self):
+		self.consumedRows = 0
+		self.consumedCols = 0
+
+	def init(self, sub):
+		self.sub = sub
+
+	def close(self, keepProgress):
+		self.sub.close(keepProgress)	
+
+	def consume(self):
+		self.data = self.sub.consume()
+		self.consumedRows = len(self.data)
+		self.consumedCols = len(self.sub.fields)
+		return self.consumedRows
+
+	def checkRows(self, expectRows):
+		if self.consumedRows != expectRows:
+			tdLog.exit("consumed rows:%d != expect:%d" % (self.consumedRows, expectRows))
+		tdLog.info("consumed rows:%d == expect:%d" % (self.consumedRows, expectRows))
+	
+
+tdSub = TDSub()	
diff --git a/tests/script/general/parser/stream_on_sys.sim b/tests/script/general/parser/stream_on_sys.sim
index 5405e09256..5507b4db48 100644
--- a/tests/script/general/parser/stream_on_sys.sim
+++ b/tests/script/general/parser/stream_on_sys.sim
@@ -28,7 +28,7 @@ sql create table diskstrm as select count(*), avg(disk_used), last(disk_used), a
 sql create table bandstrm as select count(*), avg(band_speed), last(band_speed) from log.dn1 interval(4s) sliding(2s)
 sql create table reqstrm as select count(*), avg(req_http), last(req_http), avg(req_select), last(req_select), avg(req_insert), last(req_insert) from log.dn1 interval(4s) sliding(2s)
 sql create table iostrm as select count(*), avg(io_read), last(io_read), avg(io_write), last(io_write) from log.dn1 interval(4s) sliding(2s)
-sleep 20000
+sleep 120000
 sql select * from cpustrm
 if $rows <= 0 then
   return -1
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index 2fd5db0165..e0f6b7b197 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -249,6 +249,7 @@ cd ../../../debug; make
 ./test.sh -f unique/big/maxvnodes.sim
 ./test.sh -f unique/big/tcp.sim
 
+./test.sh -f unique/cluster/alter.sim
 ./test.sh -f unique/cluster/balance1.sim
 ./test.sh -f unique/cluster/balance2.sim
 ./test.sh -f unique/cluster/balance3.sim
@@ -309,13 +310,10 @@ cd ../../../debug; make
 ./test.sh -f unique/vnode/replica3_repeat.sim
 ./test.sh -f unique/vnode/replica3_vgroup.sim
 
-# stream still has bugs
-#./test.sh -f general/parser/stream_on_sys.sim
-#./test.sh -f general/parser/repeatStream.sim
-
-#./test.sh -f general/stream/metrics_del.sim
+./test.sh -f general/parser/stream_on_sys.sim
+./test.sh -f general/stream/metrics_del.sim
 ./test.sh -f general/stream/metrics_n.sim
-#./test.sh -f general/stream/metrics_replica1_vnoden.sim
+./test.sh -f general/stream/metrics_replica1_vnoden.sim
 ./test.sh -f general/stream/restart_stream.sim
 ./test.sh -f general/stream/stream_3.sim
 ./test.sh -f general/stream/stream_restart.sim
@@ -327,13 +325,12 @@ cd ../../../debug; make
 ./test.sh -f unique/arbitrator/check_cluster_cfg_para.sim
 #./test.sh -f unique/arbitrator/dn2_mn1_cache_file_sync.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_full_createTableFail.sim
-./test.sh -f unique/arbitrator/dn3_mn1_full_dropDnodeFail.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_multiCreateDropTable.sim
-./test.sh -f unique/arbitrator/dn3_mn1_nw_disable_timeout_autoDropDnode.sim
-./test.sh -f unique/arbitrator/dn3_mn1_replica2_wal1_AddDelDnode.sim
+#./test.sh -f unique/arbitrator/dn3_mn1_nw_disable_timeout_autoDropDnode.sim
+#./test.sh -f unique/arbitrator/dn3_mn1_replica2_wal1_AddDelDnode.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_replica_change_dropDnod.sim
 ./test.sh -f unique/arbitrator/dn3_mn1_replica_change.sim
-./test.sh -f unique/arbitrator/dn3_mn1_stopDnode_timeout.sim
+#./test.sh -f unique/arbitrator/dn3_mn1_stopDnode_timeout.sim
 # lower the priority while file corruption
 #./test.sh -f unique/arbitrator/dn3_mn1_vnode_change.sim
 #./test.sh -f unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
diff --git a/tests/script/sh/deploy.sh b/tests/script/sh/deploy.sh
index adbb8207be..ac65237319 100755
--- a/tests/script/sh/deploy.sh
+++ b/tests/script/sh/deploy.sh
@@ -125,7 +125,7 @@ echo "mqttDebugFlag       135"            >> $TAOS_CFG
 echo "qdebugFlag          135"            >> $TAOS_CFG
 echo "rpcDebugFlag        135"            >> $TAOS_CFG
 echo "tmrDebugFlag        131"            >> $TAOS_CFG
-echo "udebugFlag          143"            >> $TAOS_CFG
+echo "udebugFlag          135"            >> $TAOS_CFG
 echo "sdebugFlag          135"            >> $TAOS_CFG
 echo "wdebugFlag          135"            >> $TAOS_CFG
 echo "monitor             0"              >> $TAOS_CFG
diff --git a/tests/script/tmp/mnodes.sim b/tests/script/tmp/mnodes.sim
index 5cb0d72920..48dbc19cb2 100644
--- a/tests/script/tmp/mnodes.sim
+++ b/tests/script/tmp/mnodes.sim
@@ -4,10 +4,6 @@ system sh/deploy.sh -n dnode1 -i 1
 system sh/deploy.sh -n dnode2 -i 2
 system sh/deploy.sh -n dnode3 -i 3
 
-system sh/cfg.sh -n dnode1 -c walLevel -v 2
-system sh/cfg.sh -n dnode2 -c walLevel -v 2
-system sh/cfg.sh -n dnode3 -c walLevel -v 2
-
 system sh/cfg.sh -n dnode1 -c numOfMnodes -v 3
 system sh/cfg.sh -n dnode2 -c numOfMnodes -v 3
 system sh/cfg.sh -n dnode3 -c numOfMnodes -v 3
@@ -16,64 +12,28 @@ system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 4
 system sh/cfg.sh -n dnode2 -c mnodeEqualVnodeNum -v 4
 system sh/cfg.sh -n dnode3 -c mnodeEqualVnodeNum -v 4
 
-system sh/cfg.sh -n dnode1 -c http -v 1
-system sh/cfg.sh -n dnode2 -c http -v 1
-system sh/cfg.sh -n dnode3 -c http -v 1
+system sh/cfg.sh -n dnode1 -c http -v 0
+system sh/cfg.sh -n dnode2 -c http -v 0
+system sh/cfg.sh -n dnode3 -c http -v 0
 
-system sh/cfg.sh -n dnode1 -c mDebugFlag -v 143
-system sh/cfg.sh -n dnode2 -c mDebugFlag -v 143
-system sh/cfg.sh -n dnode3 -c mDebugFlag -v 143
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 20000
+system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 20000
+system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 20000
 
-system sh/cfg.sh -n dnode1 -c sdbDebugFlag -v 143
-system sh/cfg.sh -n dnode2 -c sdbDebugFlag -v 143
-system sh/cfg.sh -n dnode3 -c sdbDebugFlag -v 143
-
-system sh/cfg.sh -n dnode1 -c sdebugFlag -v 143
-system sh/cfg.sh -n dnode2 -c sdebugFlag -v 143
-system sh/cfg.sh -n dnode3 -c sdebugFlag -v 143
-
-system sh/cfg.sh -n dnode1 -c rpcDebugFlag -v 135
-system sh/cfg.sh -n dnode2 -c rpcDebugFlag -v 135
-system sh/cfg.sh -n dnode3 -c rpcDebugFlag -v 135
-
-system sh/cfg.sh -n dnode1 -c tsdbDebugFlag -v 131
-system sh/cfg.sh -n dnode2 -c tsdbDebugFlag -v 131
-system sh/cfg.sh -n dnode3 -c tsdbDebugFlag -v 131
-
-system sh/cfg.sh -n dnode1 -c mqttDebugFlag -v 131
-system sh/cfg.sh -n dnode2 -c mqttDebugFlag -v 131
-system sh/cfg.sh -n dnode3 -c mqttDebugFlag -v 131
-
-system sh/cfg.sh -n dnode1 -c qdebugFlag -v 131
-system sh/cfg.sh -n dnode2 -c qdebugFlag -v 131
-system sh/cfg.sh -n dnode3 -c qdebugFlag -v 131
-
-system sh/cfg.sh -n dnode1 -c cDebugFlag -v 135
-system sh/cfg.sh -n dnode2 -c cDebugFlag -v 135
-system sh/cfg.sh -n dnode3 -c cDebugFlag -v 135
-
-system sh/cfg.sh -n dnode1 -c udebugFlag -v 131
-system sh/cfg.sh -n dnode2 -c udebugFlag -v 131
-system sh/cfg.sh -n dnode3 -c udebugFlag -v 131
-
-system sh/cfg.sh -n dnode1 -c wdebugFlag -v 131
-system sh/cfg.sh -n dnode2 -c wdebugFlag -v 131
-system sh/cfg.sh -n dnode3 -c wdebugFlag -v 131
-
-system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 1000000
-system sh/cfg.sh -n dnode2 -c maxTablesPerVnode -v 1000000
-system sh/cfg.sh -n dnode3 -c maxTablesPerVnode -v 1000000
+system sh/cfg.sh -n dnode1 -c replica -v 3
+system sh/cfg.sh -n dnode2 -c replica -v 3
+system sh/cfg.sh -n dnode3 -c replica -v 3
 
 print ============== deploy
 
-system sh/exec.sh -n dnode1 -s start
-sleep 2001
+system sh/exec.sh -n dnode1 -s start 
+sleep 5001
 sql connect
 
 sql create dnode $hostname2
 sql create dnode $hostname3
-system sh/exec.sh -n dnode2 -s start
-system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode2 -s start 
+system sh/exec.sh -n dnode3 -s start 
 
 print  =============== step1
 $x = 0
@@ -112,8 +72,8 @@ print $data0_3 $data2_3
 
 
 $x = $x + 1
-sleep 2000
-if $x == 1000 then
+sleep 5000
+if $x == 100000 then
   return -1
 endi
 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim
index 3df21a1c5d..b625619678 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_r2_vnode_delDir.sim
@@ -137,8 +137,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data6_2
-$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data5_2
+$dnode2Vtatus = $data7_2
 
 if $dnode3Vtatus != offline then
   sleep 2000
@@ -204,8 +204,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data6_2
-$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data5_2
+$dnode2Vtatus = $data7_2
 
 print dnode2Vtatus: $dnode3Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -319,8 +319,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data6_2
-$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data5_2
+$dnode2Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim
index 97b77aa66f..c647a35a5c 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_r3_vnode_delDir.sim
@@ -139,8 +139,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -206,8 +206,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -325,8 +325,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -386,8 +386,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim b/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim
index 95fb21a017..23ace47e3c 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_replica_change.sim
@@ -358,10 +358,10 @@ print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $dat
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4  $data10_4
 #print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
 #print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
-$thirdDnode_2 = $data10_1 
-$thirdDnode_3 = $data10_2 
-$thirdDnode_4 = $data10_3 
-$thirdDnode_5 = $data10_4 
+$thirdDnode_2 = $data8_1 
+$thirdDnode_3 = $data8_2 
+$thirdDnode_4 = $data8_3 
+$thirdDnode_5 = $data8_4 
 
 if $thirdDnode_2 != null then
   sleep 2000
@@ -405,10 +405,10 @@ print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $dat
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4
 #print $data0_5  $data1_5  $data2_5  $data3_5  $data4_5
 #print $data0_6  $data1_6  $data2_6  $data3_6  $data4_6
-$sencodDnode_2 = $data7_1 
-$sencodDnode_3 = $data7_2 
-$sencodDnode_4 = $data7_3 
-$sencodDnode_5 = $data7_4 
+$sencodDnode_2 = $data6_1 
+$sencodDnode_3 = $data6_2 
+$sencodDnode_4 = $data6_3 
+$sencodDnode_5 = $data6_4 
 
 if $sencodDnode_2 != null then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
index ee974ad6db..b18edf0670 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
@@ -138,8 +138,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -213,8 +213,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -287,8 +287,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
index 6a8d69c271..3b208e6f1a 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_offline.sim
@@ -144,8 +144,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data6_2
-$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data5_2
+$dnode2Vtatus = $data7_2
 
 if $dnode3Vtatus != offline then
   sleep 2000
@@ -234,8 +234,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode2Vtatus != master then
   sleep 2000
@@ -313,8 +313,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -393,8 +393,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus == offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
index 1642e8a322..4f737b9c40 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
@@ -196,8 +196,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -269,8 +269,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -325,8 +325,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != slave then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim
index 59a62aa63d..f50081ea70 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_createErrData_online.sim
@@ -158,8 +158,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -231,8 +231,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -287,8 +287,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != slave then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
index a0629abab8..3582a3b7b2 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_delDir.sim
@@ -141,8 +141,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -201,8 +201,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -301,8 +301,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
@@ -417,8 +417,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 print dnode4Vtatus: $dnode4Vtatus
 print dnode3Vtatus: $dnode3Vtatus 
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim
index e2fa1fbe2f..4040318801 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_noCorruptFile_offline.sim
@@ -144,8 +144,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data6_2
-$dnode2Vtatus = $data9_2
+$dnode3Vtatus = $data5_2
+$dnode2Vtatus = $data7_2
 
 if $dnode3Vtatus != offline then
   sleep 2000
@@ -234,8 +234,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != master then
   sleep 2000
@@ -313,8 +313,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus != offline then
   sleep 2000
@@ -392,8 +392,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode2Vtatus = $data9_2
-$dnode3Vtatus = $data6_2
+$dnode2Vtatus = $data7_2
+$dnode3Vtatus = $data5_2
 
 if $dnode2Vtatus == offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim
index a425bc3e92..53209b0d5a 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_nomaster.sim
@@ -151,8 +151,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -259,8 +259,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode3Vtatus = $data6_3
-$dnode2Vtatus = $data9_3
+$dnode3Vtatus = $data5_3
+$dnode2Vtatus = $data7_3
 
 if $dnode3Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
index 12d0a19f73..c11bfa62f9 100644
--- a/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_alterTable_online.sim
@@ -139,8 +139,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim b/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim
index be032dfa76..bed5cefa76 100644
--- a/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_alterTag_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
index d79ba724f7..9fdb70142b 100644
--- a/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_createTable_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim b/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
index 20f4552fe3..6752e0345d 100644
--- a/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_dropDb_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim b/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
index 7131df5d24..1280cfe7a0 100644
--- a/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica2_dropTable_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
index 48eb9512c8..27c2ba4328 100644
--- a/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_alterTable_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim b/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim
index 13d88f0f38..86fb51cfa9 100644
--- a/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_alterTag_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
index c96d7f5b6e..4dcc5977f3 100644
--- a/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_createTable_online.sim
@@ -144,8 +144,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim b/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
index 1392e6c8a7..4f4cf6a263 100644
--- a/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_dropDb_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim b/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
index 729aff56c0..98946c4b7c 100644
--- a/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
+++ b/tests/script/unique/arbitrator/offline_replica3_dropTable_online.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim b/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
index 25da315be4..dc8b1d015d 100644
--- a/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_alterTable_add.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim b/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
index a26c1b04ed..d2c82f98ff 100644
--- a/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_alterTable_drop.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_dropDb.sim b/tests/script/unique/arbitrator/sync_replica2_dropDb.sim
index 1556a03b67..96aec2dcf8 100644
--- a/tests/script/unique/arbitrator/sync_replica2_dropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_dropDb.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica2_dropTable.sim b/tests/script/unique/arbitrator/sync_replica2_dropTable.sim
index 669b41becb..a1d7d18c94 100644
--- a/tests/script/unique/arbitrator/sync_replica2_dropTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica2_dropTable.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim b/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
index 00c42cb7e3..ba973cbe06 100644
--- a/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_alterTable_add.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim b/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
index 1d774e195e..9b918acc8e 100644
--- a/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_alterTable_drop.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_createTable.sim b/tests/script/unique/arbitrator/sync_replica3_createTable.sim
index db29eaf838..3bf274a3ea 100644
--- a/tests/script/unique/arbitrator/sync_replica3_createTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_createTable.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim b/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
index 5b751e96f8..c8fe96008b 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
@@ -139,8 +139,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
@@ -207,8 +207,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != slave then
   sleep 2000
@@ -240,8 +240,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != master then
   sleep 2000
@@ -314,8 +314,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != slave then
   sleep 2000
@@ -347,8 +347,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != master then
   sleep 2000
@@ -437,8 +437,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != slave then
   sleep 2000
@@ -470,8 +470,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != master then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_dropDb.sim b/tests/script/unique/arbitrator/sync_replica3_dropDb.sim
index 83f1d16856..4c7bb3d26c 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dropDb.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/arbitrator/sync_replica3_dropTable.sim b/tests/script/unique/arbitrator/sync_replica3_dropTable.sim
index e874afeaed..7ac424666a 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dropTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dropTable.sim
@@ -143,8 +143,8 @@ print show vgroups:
 print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $data7_1  $data8_1  $data9_1
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
-$dnode4Vtatus = $data6_2
-$dnode3Vtatus = $data9_2
+$dnode4Vtatus = $data5_2
+$dnode3Vtatus = $data7_2
 
 if $dnode4Vtatus != offline then
   sleep 2000
diff --git a/tests/script/unique/cluster/alter.sim b/tests/script/unique/cluster/alter.sim
new file mode 100644
index 0000000000..7e56707a69
--- /dev/null
+++ b/tests/script/unique/cluster/alter.sim
@@ -0,0 +1,174 @@
+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+
+system sh/cfg.sh -n dnode1 -c role -v 1
+system sh/cfg.sh -n dnode2 -c role -v 2
+system sh/cfg.sh -n dnode3 -c role -v 2
+system sh/cfg.sh -n dnode4 -c role -v 2
+
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+
+system sh/cfg.sh -n dnode1 -c wallevel -v 2
+system sh/cfg.sh -n dnode2 -c wallevel -v 2
+system sh/cfg.sh -n dnode3 -c wallevel -v 2
+system sh/cfg.sh -n dnode4 -c wallevel -v 2
+
+system sh/cfg.sh -n dnode1 -c balance -v 0
+system sh/cfg.sh -n dnode2 -c balance -v 0
+system sh/cfg.sh -n dnode3 -c balance -v 0
+system sh/cfg.sh -n dnode4 -c balance -v 0
+
+print ========== step1
+system sh/exec.sh -n dnode1 -s start
+sql connect
+sleep 3000
+
+sql create dnode $hostname2
+system sh/exec.sh -n dnode2 -s start
+sleep 3000
+
+print ========== step2
+sql create database d1
+sql create table d1.t1 (t timestamp, i int) 
+sql insert into d1.t1 values(now+1s, 15)
+sql insert into d1.t1 values(now+2s, 14)
+sql insert into d1.t1 values(now+3s, 13)
+sql insert into d1.t1 values(now+4s, 12)
+sql insert into d1.t1 values(now+5s, 11)
+
+print ========== step3
+sleep 2000
+sql create dnode $hostname3
+system sh/exec.sh -n dnode3 -s start
+sql create dnode $hostname4
+system sh/exec.sh -n dnode4 -s start
+
+sql show dnodes
+print dnode1 openVnodes $data2_1
+print dnode2 openVnodes $data2_2
+print dnode3 openVnodes $data2_3
+print dnode4 openVnodes $data2_4
+if $data2_1 != 0 then
+	return -1
+endi
+if $data2_2 != 1 then
+	return -1
+endi
+if $data2_3 != 0 then
+	return -1
+endi
+if $data2_4 != 0 then
+	return -1
+endi
+
+print ========== step4
+sql alter dnode 2 balance "vnode:2-dnode:3"
+
+$x = 0
+show4: 
+	$x = $x + 1
+	sleep 2000
+	if $x == 10 then
+		return -1
+	endi
+	
+sql show dnodes
+print dnode1 openVnodes $data2_1
+print dnode2 openVnodes $data2_2
+print dnode3 openVnodes $data2_3
+print dnode4 openVnodes $data2_4
+if $data2_2 != 0 then
+    goto show4
+endi
+if $data2_3 != 1 then
+    goto show4
+endi
+if $data2_4 != 0 then
+    goto show4
+endi
+
+print ========== step5
+sql alter dnode 3 balance "vnode:2-dnode:4"
+
+$x = 0
+show5: 
+	$x = $x + 1
+	sleep 2000
+	if $x == 10 then
+		return -1
+	endi
+	
+sql show dnodes
+print dnode1 openVnodes $data2_1
+print dnode2 openVnodes $data2_2
+print dnode3 openVnodes $data2_3
+print dnode4 openVnodes $data2_4
+if $data2_2 != 0 then
+    goto show5
+endi
+if $data2_3 != 0 then
+    goto show5
+endi
+if $data2_4 != 1 then
+    goto show5
+endi
+
+print ========== step6
+sql alter dnode 4 balance "vnode:2-dnode:2"
+
+$x = 0
+show6: 
+	$x = $x + 1
+	sleep 2000
+	if $x == 10 then
+		return -1
+	endi
+	
+sql show dnodes
+print dnode1 openVnodes $data2_1
+print dnode2 openVnodes $data2_2
+print dnode3 openVnodes $data2_3
+print dnode4 openVnodes $data2_4
+if $data2_2 != 1 then
+    goto show6
+endi
+if $data2_3 != 0 then
+    goto show6
+endi
+if $data2_4 != 0 then
+    goto show6
+endi
+
+print ========== step7
+sql select * from d1.t1 order by t desc
+print $data01 $data11 $data21 $data31 $data41 
+if $data01 != 11 then
+  return -1
+endi
+if $data11 != 12 then
+  return -1
+endi
+if $data21 != 13 then
+  return -1
+endi
+if $data31 != 14 then
+  return -1
+endi
+if $data41 != 15 then
+  return -1
+endi
+
+print ========== step8
+sql_error sql alter dnode 4 balance "vnode:2-dnode:5"
+
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
+system sh/exec.sh -n dnode3 -s stop  -x SIGINT
+system sh/exec.sh -n dnode4 -s stop  -x SIGINT
\ No newline at end of file
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim
index 7dd911a63e..12f0013191 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeDir.sim
@@ -194,13 +194,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data6_4
-$d2v3status = $data6_2
-$d2v4status = $data6_3
+$d2v2status = $data5_4
+$d2v3status = $data5_2
+$d2v4status = $data5_3
 
-$d1v2status = $data9_4
-$d1v3status = $data9_2
-$d1v4status = $data9_3
+$d1v2status = $data7_4
+$d1v3status = $data7_2
+$d1v4status = $data7_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim
index bcbf388946..29da1fd773 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir.sim
@@ -196,13 +196,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data6_4
-$d2v3status = $data6_2
-$d2v4status = $data6_3
+$d2v2status = $data5_4
+$d2v3status = $data5_2
+$d2v4status = $data5_3
 
-$d1v2status = $data9_4
-$d1v3status = $data9_2
-$d1v4status = $data9_3
+$d1v2status = $data7_4
+$d1v3status = $data7_2
+$d1v4status = $data7_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim
index ab76affafc..691b2cb568 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmMnodeVnodeDir_stopAll_starAll.sim
@@ -161,13 +161,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data6_4
-$d2v3status = $data6_2
-$d2v4status = $data6_3
+$d2v2status = $data5_4
+$d2v3status = $data5_2
+$d2v4status = $data5_3
 
-$d1v2status = $data9_4
-$d1v3status = $data9_2
-$d1v4status = $data9_3
+$d1v2status = $data7_4
+$d1v3status = $data7_2
+$d1v4status = $data7_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim b/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim
index f6a60d6b08..8a1132de2e 100644
--- a/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim
+++ b/tests/script/unique/migrate/mn2_vn2_repl2_rmVnodeDir.sim
@@ -194,13 +194,13 @@ print $data0_1  $data1_1  $data2_1  $data3_1  $data4_1  $data5_1  $data6_1  $dat
 print $data0_2  $data1_2  $data2_2  $data3_2  $data4_2  $data5_2  $data6_2  $data7_2  $data8_2  $data9_2
 print $data0_3  $data1_3  $data2_3  $data3_3  $data4_3  $data5_3  $data6_3  $data7_3  $data8_3  $data9_3
 print $data0_4  $data1_4  $data2_4  $data3_4  $data4_4  $data5_4  $data6_4  $data7_4  $data8_4  $data9_4
-$d2v2status = $data6_4
-$d2v3status = $data6_2
-$d2v4status = $data6_3
+$d2v2status = $data5_4
+$d2v3status = $data5_2
+$d2v4status = $data5_3
 
-$d1v2status = $data9_4
-$d1v3status = $data9_2
-$d1v4status = $data9_3
+$d1v2status = $data7_4
+$d1v3status = $data7_2
+$d1v4status = $data7_3
 
 if $d2v2status != master then
   sleep 2000
diff --git a/tests/test/c/CMakeLists.txt b/tests/test/c/CMakeLists.txt
index 4717a4f769..8686a23f65 100644
--- a/tests/test/c/CMakeLists.txt
+++ b/tests/test/c/CMakeLists.txt
@@ -10,8 +10,8 @@ IF ((TD_LINUX_64) OR (TD_LINUX_32 AND TD_ARM))
   #add_executable(insertPerTable insertPerTable.c)
   #target_link_libraries(insertPerTable taos_static pthread)
 
-  #add_executable(insertPerRow insertPerRow.c)
-  #target_link_libraries(insertPerRow taos_static pthread)
+  add_executable(insertPerRow insertPerRow.c)
+  target_link_libraries(insertPerRow taos_static pthread)
 
   #add_executable(importOneRow importOneRow.c)
   #target_link_libraries(importOneRow taos_static pthread)
diff --git a/tests/test/c/insertPerRow.c b/tests/test/c/insertPerRow.c
index 9b71ce50dd..824c1b925a 100644
--- a/tests/test/c/insertPerRow.c
+++ b/tests/test/c/insertPerRow.c
@@ -44,14 +44,16 @@ void  createDbAndTable();
 void  insertData();
 
 int32_t randomData[MAX_RANDOM_POINTS];
-int64_t rowsPerTable = 10000;
+int64_t rowsPerTable = 1000000000;
 int64_t pointsPerTable = 1;
-int64_t numOfThreads = 1;
-int64_t numOfTablesPerThread = 200;
+int64_t numOfThreads = 10;
+int64_t numOfTablesPerThread = 100;
 char    dbName[32] = "db";
 char    stableName[64] = "st";
-int32_t cache = 16;
-int32_t tables = 5000;
+int32_t cache = 1;
+int32_t replica = 3;
+int32_t days = 10;
+int32_t interval = 1000;
 
 int main(int argc, char *argv[]) {
   shellParseArgument(argc, argv);
@@ -77,7 +79,7 @@ void createDbAndTable() {
     exit(1);
   }
 
-  sprintf(qstr, "create database if not exists %s cache %d maxtables %d", dbName, cache, tables);
+  sprintf(qstr, "create database if not exists %s cache %d replica %d days %d", dbName, cache, replica, days);
   pSql = taos_query(con, qstr);
   int32_t code = taos_errno(pSql);
   if (code != 0) {
@@ -239,7 +241,7 @@ void *syncTest(void *param) {
   st = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
 
   int64_t start = 1430000000000;
-  int64_t interval = 1000;  // 1000 ms
+  interval = 1000;  // 1000 ms
 
   char *sql = qstr;
   char  inserStr[] = "insert into";
@@ -309,10 +311,14 @@ void printHelp() {
   printf("%s%s%s%" PRId64 "\n", indent, indent, "Number of threads to be used, default is ", numOfThreads);
   printf("%s%s\n", indent, "-n");
   printf("%s%s%s%" PRId64 "\n", indent, indent, "Number of tables per thread, default is ", numOfTablesPerThread);
-  printf("%s%s\n", indent, "-tables");
-  printf("%s%s%s%d\n", indent, indent, "Database parameters tables, default is ", tables);
+  printf("%s%s\n", indent, "-replica");
+  printf("%s%s%s%d\n", indent, indent, "Database parameters replica, default is ", replica);
   printf("%s%s\n", indent, "-cache");
-  printf("%s%s%s%d\n", indent, indent, "Database parameters cache, default is ", cache);
+  printf("%s%s%s%d\n", indent, indent, "Database parameters replica, default is ", cache);
+  printf("%s%s\n", indent, "-days");
+  printf("%s%s%s%d\n", indent, indent, "Database parameters days, default is ", days);
+  printf("%s%s\n", indent, "-interval");
+  printf("%s%s%s%d\n", indent, indent, "Interval of each rows in ms, default is ", interval);
 
   exit(EXIT_SUCCESS);
 }
@@ -336,10 +342,14 @@ void shellParseArgument(int argc, char *argv[]) {
       numOfThreads = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-n") == 0) {
       numOfTablesPerThread = atoi(argv[++i]);
-    } else if (strcmp(argv[i], "-tables") == 0) {
-      tables = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-replica") == 0) {
+      replica = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-cache") == 0) {
       cache = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-days") == 0) {
+      days = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-interval") == 0) {
+      interval = atoi(argv[++i]);
     } else {
     }
   }
@@ -349,7 +359,7 @@ void shellParseArgument(int argc, char *argv[]) {
   pPrint("%snumOfThreads:%" PRId64 "%s", GREEN, numOfThreads, NC);
   pPrint("%snumOfTablesPerThread:%" PRId64 "%s", GREEN, numOfTablesPerThread, NC);
   pPrint("%scache:%" PRId32 "%s", GREEN, cache, NC);
-  pPrint("%stables:%" PRId32 "%s", GREEN, tables, NC);
+  pPrint("%stables:%" PRId32 "%s", GREEN, replica, NC);
   pPrint("%sdbName:%s%s", GREEN, dbName, NC);
   pPrint("%stableName:%s%s", GREEN, stableName, NC);
   pPrint("%sstart to run%s", GREEN, NC);
diff --git a/tests/tsim/src/simExe.c b/tests/tsim/src/simExe.c
index 3febb927c4..3469180607 100644
--- a/tests/tsim/src/simExe.c
+++ b/tests/tsim/src/simExe.c
@@ -670,12 +670,12 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
     ret = taos_errno(pSql);
     
     if (ret == TSDB_CODE_MND_TABLE_ALREADY_EXIST || ret == TSDB_CODE_MND_DB_ALREADY_EXIST) {
-      simDebug("script:%s, taos:%p, %s success, ret:%d:%s", script->fileName, script->taos, rest, ret, tstrerror(ret));
+      simDebug("script:%s, taos:%p, %s success, ret:%d:%s", script->fileName, script->taos, rest, ret & 0XFFFF, tstrerror(ret));
       ret = 0;
       break;
     } else if (ret != 0) {
       simDebug("script:%s, taos:%p, %s failed, ret:%d:%s, error:%s",
-               script->fileName, script->taos, rest, ret, tstrerror(ret), taos_errstr(pSql));
+               script->fileName, script->taos, rest, ret & 0XFFFF, tstrerror(ret), taos_errstr(pSql));
 
       if (line->errorJump == SQL_JUMP_TRUE) {
         script->linePos = line->jump;
@@ -691,7 +691,7 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
   }
 
   if (ret) {
-    sprintf(script->error, "lineNum:%d. sql:%s failed, ret:%d:%s", line->lineNum, rest, ret, tstrerror(ret));
+    sprintf(script->error, "lineNum:%d. sql:%s failed, ret:%d:%s", line->lineNum, rest, ret & 0XFFFF, tstrerror(ret));
     return false;
   }
 
@@ -821,7 +821,7 @@ bool simExecuteRestFulSqlCommand(SScript *script, char *rest) {
     ret = simExecuteRestFulCommand(script, command);
     if (ret == TSDB_CODE_MND_TABLE_ALREADY_EXIST ||
         ret == TSDB_CODE_MND_DB_ALREADY_EXIST) {
-      simDebug("script:%s, taos:%p, %s success, ret:%d:%s", script->fileName, script->taos, rest, ret, tstrerror(ret));
+      simDebug("script:%s, taos:%p, %s success, ret:%d:%s", script->fileName, script->taos, rest, ret & 0XFFFF, tstrerror(ret));
       ret = 0;
       break;
     } else if (ret != 0) {
@@ -957,12 +957,12 @@ bool simExecuteSqlErrorCmd(SScript *script, char *rest) {
 
   if (ret != TSDB_CODE_SUCCESS) {
     simDebug("script:%s, taos:%p, %s execute, expect failed, so success, ret:%d:%s",
-        script->fileName, script->taos, rest, ret, tstrerror(ret));
+        script->fileName, script->taos, rest, ret & 0XFFFF, tstrerror(ret));
     script->linePos++;
     return true;
   }
   
-  sprintf(script->error, "lineNum:%d. sql:%s expect failed, but success, ret:%d:%s", line->lineNum, rest, ret, tstrerror(ret));
+  sprintf(script->error, "lineNum:%d. sql:%s expect failed, but success, ret:%d:%s", line->lineNum, rest, ret & 0XFFFF, tstrerror(ret));
 
   return false;
 }