diff --git a/CMakeLists.txt b/CMakeLists.txt
index 946ceb95aba3fefdcda62d6aa5f497a377e98124..588526c28614f753f6ff70e898f13f3fd65318db 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,6 +13,8 @@ ENDIF ()
 SET(TD_ACCOUNT FALSE)
 SET(TD_ADMIN FALSE)
 SET(TD_GRANT FALSE)
+SET(TD_SYNC TRUE)
+SET(TD_MQTT TRUE)
 SET(TD_TSDB_PLUGINS FALSE)
 
 SET(TD_COVER FALSE)
diff --git a/cmake/define.inc b/cmake/define.inc
index 6dd604057c06d504c881cf57018429c9694bc4b9..28770be2545ed007320e2de6385de0783c3138ba 100755
--- a/cmake/define.inc
+++ b/cmake/define.inc
@@ -13,6 +13,14 @@ IF (TD_GRANT)
   ADD_DEFINITIONS(-D_GRANT)
 ENDIF ()
 
+IF (TD_SYNC)
+  ADD_DEFINITIONS(-D_SYNC)
+ENDIF ()
+
+IF (TD_MQTT)
+  ADD_DEFINITIONS(-D_MQTT)
+ENDIF ()
+
 IF (TD_TSDB_PLUGINS)
   ADD_DEFINITIONS(-D_TSDB_PLUGINS)
 ENDIF ()
diff --git a/cmake/input.inc b/cmake/input.inc
index f90b10a0870732d9b0c5de548a4c4c75f52137a3..1ef2045f57e5c9df94b6fe8284930711e8624a8a 100755
--- a/cmake/input.inc
+++ b/cmake/input.inc
@@ -42,6 +42,16 @@ IF (${MEM_CHECK} MATCHES "true")
   MESSAGE(STATUS "build with memory check")
 ENDIF ()
 
+IF (${MQTT} MATCHES "false")
+  SET(TD_MQTT FALSE)
+  MESSAGE(STATUS "build without mqtt module")
+ENDIF ()
+
+IF (${SYNC} MATCHES "false")
+  SET(TD_SYNC FALSE)
+  MESSAGE(STATUS "build without sync module")
+ENDIF ()
+
 IF (${RANDOM_FILE_FAIL} MATCHES "true")
   SET(TD_RANDOM_FILE_FAIL TRUE)
   MESSAGE(STATUS "build with random-file-fail enabled")
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 64930b29d2880ba70348e1fd50c4bd953ba2d980..8c6c73c4400da973726109aa66a50c97e3a2a6f6 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -10,6 +10,6 @@ ADD_SUBDIRECTORY(cJson)
 ADD_SUBDIRECTORY(wepoll)
 ADD_SUBDIRECTORY(MsvcLibX)
 
-IF (TD_LINUX)
+IF (TD_LINUX AND TD_MQTT)
   ADD_SUBDIRECTORY(MQTT-C)
 ENDIF ()
\ No newline at end of file
diff --git a/deps/MQTT-C/CMakeLists.txt b/deps/MQTT-C/CMakeLists.txt
index ea5d4238d57a87b9546510f1511869f1b68e7722..15b35525210ec90e6e2efbdcd0e6128cb4d34f91 100644
--- a/deps/MQTT-C/CMakeLists.txt
+++ b/deps/MQTT-C/CMakeLists.txt
@@ -1,5 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
-project(MQTT-C VERSION 1.1.2 LANGUAGES C)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 
 # MQTT-C build options
 option(MQTT_C_OpenSSL_SUPPORT "Build MQTT-C with OpenSSL support?" OFF)
diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index a91dde8796bdca67f9abea027d1f31fb636ba86e..7be6e729622ed3201725aa42d38fe7896052b37c 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -122,11 +122,14 @@
 # number of replications, for cluster only 
 # replica               1
 
-# mqtt uri  
-# mqttBrokerAddress     mqtt://username:password@hostname:1883/taos/
+# mqtt hostname  
+# mqttHostName          test.mosquitto.org
 
-# mqtt client name 
-# mqttBrokerClientId    taos_mqtt
+# mqtt port  
+# mqttPort              1883
+
+# mqtt topic
+# mqttTopic             /weather/loop
 
 # the compressed rpc message, option:
 #  -1 (no compression)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ede66d95bb5699ef0480e3168227b218372bc8b1..898b7cb032846cb85e4cc8767ed6090b35f41e1a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -10,7 +10,9 @@ ADD_SUBDIRECTORY(client)
 ADD_SUBDIRECTORY(query)
 ADD_SUBDIRECTORY(kit)
 ADD_SUBDIRECTORY(plugins)
-ADD_SUBDIRECTORY(sync)
+IF (TD_SYNC)
+  ADD_SUBDIRECTORY(sync)
+ENDIF ()
 ADD_SUBDIRECTORY(balance)
 ADD_SUBDIRECTORY(mnode)
 ADD_SUBDIRECTORY(vnode)
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index ef0713c4152832aca87f2b768ddcf3789b581a71..fedafe5b022bdf54fb8439a10c7d6355485fef93 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -104,8 +104,12 @@ extern int32_t  tsTelegrafUseFieldNum;
 
 // mqtt
 extern int32_t tsEnableMqttModule;
-extern char    tsMqttBrokerAddress[];
-extern char    tsMqttBrokerClientId[];
+extern char tsMqttHostName[];
+extern char tsMqttPort[];
+extern char tsMqttUser[];
+extern char tsMqttPass[];
+extern char tsMqttClientId[];
+extern char tsMqttTopic[];
 
 // monitor
 extern int32_t tsEnableMonitorModule;
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 795585e5c9220dd209b85731b6278f1acf279aa5..c7763a257a82a2cec100c850eab644a0a99a3113 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -137,8 +137,12 @@ int32_t  tsTelegrafUseFieldNum = 0;
 
 // mqtt
 int32_t tsEnableMqttModule = 0;  // not finished yet, not started it by default
-char    tsMqttBrokerAddress[128] = {0};
-char    tsMqttBrokerClientId[128] = {0};
+char    tsMqttHostName[TSDB_MQTT_HOSTNAME_LEN] = "test.mosquitto.org";
+char    tsMqttPort[TSDB_MQTT_PORT_LEN] = "1883";
+char    tsMqttUser[TSDB_MQTT_USER_LEN] = {0};
+char    tsMqttPass[TSDB_MQTT_PASS_LEN] = {0};
+char    tsMqttClientId[TSDB_MQTT_CLIENT_ID_LEN] = "TDengineMqttSubscriber";
+char    tsMqttTopic[TSDB_MQTT_TOPIC_LEN] = "/test"; // #
 
 // monitor
 int32_t tsEnableMonitorModule = 1;
@@ -247,8 +251,11 @@ bool taosCfgDynamicOptions(char *msg) {
 
   for (int32_t i = 0; i < tsGlobalConfigNum; ++i) {
     SGlobalCfg *cfg = tsGlobalConfig + i;
-    if (!(cfg->cfgType & TSDB_CFG_CTYPE_B_LOG)) continue;
+    //if (!(cfg->cfgType & TSDB_CFG_CTYPE_B_LOG)) continue;
     if (cfg->valType != TAOS_CFG_VTYPE_INT32) continue;
+    
+    int32_t cfgLen = strlen(cfg->option);
+    if (cfgLen != olen) continue;
     if (strncasecmp(option, cfg->option, olen) != 0) continue;
     *((int32_t *)cfg->ptr) = vint;
 
@@ -767,26 +774,36 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "mqttBrokerAddress";
-  cfg.ptr = tsMqttBrokerAddress;
+  cfg.option = "mqttHostName";
+  cfg.ptr = tsMqttHostName;
   cfg.valType = TAOS_CFG_VTYPE_STRING;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_CLIENT | TSDB_CFG_CTYPE_B_NOT_PRINT;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_NOT_PRINT;
   cfg.minValue = 0;
   cfg.maxValue = 0;
-  cfg.ptrLength = 126;
+  cfg.ptrLength = TSDB_MQTT_HOSTNAME_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "mqttBrokerClientId";
-  cfg.ptr = tsMqttBrokerClientId;
+  cfg.option = "mqttPort";
+  cfg.ptr = tsMqttPort;
   cfg.valType = TAOS_CFG_VTYPE_STRING;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_CLIENT | TSDB_CFG_CTYPE_B_NOT_PRINT;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_NOT_PRINT;
   cfg.minValue = 0;
   cfg.maxValue = 0;
-  cfg.ptrLength = 126;
+  cfg.ptrLength = TSDB_MQTT_PORT_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
- 
+
+  cfg.option = "mqttTopic";
+  cfg.ptr = tsMqttTopic;
+  cfg.valType = TAOS_CFG_VTYPE_STRING;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_NOT_PRINT;
+  cfg.minValue = 0;
+  cfg.maxValue = 0;
+  cfg.ptrLength = TSDB_MQTT_TOPIC_LEN;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "compressMsgSize";
   cfg.ptr = &tsCompressMsgSize;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
@@ -1270,6 +1287,9 @@ void taosInitGlobalCfg() {
 }
 
 bool taosCheckGlobalCfg() {
+  char fqdn[TSDB_FQDN_LEN];
+  uint16_t port;
+
   if (debugFlag & DEBUG_TRACE || debugFlag & DEBUG_DEBUG || debugFlag & DEBUG_DUMP) {
     taosSetAllDebugFlag();
   }
@@ -1283,12 +1303,18 @@ bool taosCheckGlobalCfg() {
 
   if (tsFirst[0] == 0) {
     strcpy(tsFirst, tsLocalEp);
+  } else {
+    taosGetFqdnPortFromEp(tsFirst, fqdn, &port);
+    snprintf(tsFirst, sizeof(tsFirst), "%s:%d", fqdn, port);
   }
 
   if (tsSecond[0] == 0) {
     strcpy(tsSecond, tsLocalEp);
+  } else {
+    taosGetFqdnPortFromEp(tsSecond, fqdn, &port);
+    snprintf(tsSecond, sizeof(tsSecond), "%s:%d", fqdn, port);
   }
-  
+
   taosGetSystemInfo();
 
   tsSetLocale();
diff --git a/src/dnode/CMakeLists.txt b/src/dnode/CMakeLists.txt
index 24a109dd2985f6298f10185fa20df45014565c07..dea90811ad83206b05e29b0e2468b8057ac8d7a8 100644
--- a/src/dnode/CMakeLists.txt
+++ b/src/dnode/CMakeLists.txt
@@ -11,10 +11,12 @@ AUX_SOURCE_DIRECTORY(src SRC)
 
 IF (TD_LINUX)
   ADD_EXECUTABLE(taosd ${SRC})
+  TARGET_LINK_LIBRARIES(taosd mnode monitor http tsdb twal vnode cJson lz4)
+
   IF (TD_SOMODE_STATIC)
-    TARGET_LINK_LIBRARIES(taosd mnode taos_static monitor http mqtt tsdb twal vnode cJson lz4 balance sync)
+    TARGET_LINK_LIBRARIES(taosd taos_static)
   ELSE ()
-    TARGET_LINK_LIBRARIES(taosd mnode taos monitor http mqtt tsdb twal vnode cJson lz4 balance sync)
+    TARGET_LINK_LIBRARIES(taosd taos)
   ENDIF ()
 
   IF (TD_ACCOUNT)
@@ -25,6 +27,14 @@ IF (TD_LINUX)
     TARGET_LINK_LIBRARIES(taosd grant)
   ENDIF ()
 
+  IF (TD_MQTT)
+    TARGET_LINK_LIBRARIES(taosd mqtt)
+  ENDIF ()
+
+  IF (TD_SYNC)
+    TARGET_LINK_LIBRARIES(taosd balance sync)
+  ENDIF ()
+
   SET(PREPARE_ENV_CMD "prepare_env_cmd")
   SET(PREPARE_ENV_TARGET "prepare_env_target")
   ADD_CUSTOM_COMMAND(OUTPUT ${PREPARE_ENV_CMD}
diff --git a/src/dnode/src/dnodeMgmt.c b/src/dnode/src/dnodeMgmt.c
index 1f41bc23eb266056973d86d80fbcbf37319faa5b..c968246a68e0f8db8c55f8964a9332b17a30fdcc 100644
--- a/src/dnode/src/dnodeMgmt.c
+++ b/src/dnode/src/dnodeMgmt.c
@@ -611,7 +611,7 @@ static bool dnodeReadMnodeInfos() {
   }
 
   for (int i = 0; i < size; ++i) {
-    cJSON* nodeInfo = cJSON_GetArrayItem(nodeInfos, i);
+    cJSON *nodeInfo = cJSON_GetArrayItem(nodeInfos, i);
     if (nodeInfo == NULL) continue;
 
     cJSON *nodeId = cJSON_GetObjectItem(nodeInfo, "nodeId");
@@ -627,7 +627,7 @@ static bool dnodeReadMnodeInfos() {
       goto PARSE_OVER;
     }
     strncpy(tsDMnodeInfos.nodeInfos[i].nodeEp, nodeEp->valuestring, TSDB_EP_LEN);
- }
+  }
 
   ret = true;
 
diff --git a/src/dnode/src/dnodeModule.c b/src/dnode/src/dnodeModule.c
index f8acb871c578deda6f51d4ae692eedfc89f1afd6..e1d298089caec13af8f34d508a3620d9b4508b0f 100644
--- a/src/dnode/src/dnodeModule.c
+++ b/src/dnode/src/dnodeModule.c
@@ -62,6 +62,7 @@ static void dnodeAllocModules() {
     dnodeSetModuleStatus(TSDB_MOD_HTTP);
   }
 
+#ifdef _MQTT
   tsModule[TSDB_MOD_MQTT].enable = (tsEnableMqttModule == 1);
   tsModule[TSDB_MOD_MQTT].name = "mqtt";
   tsModule[TSDB_MOD_MQTT].initFp = mqttInitSystem;
@@ -71,6 +72,7 @@ static void dnodeAllocModules() {
   if (tsEnableMqttModule) {
     dnodeSetModuleStatus(TSDB_MOD_MQTT);
   }
+#endif  
 
   tsModule[TSDB_MOD_MONITOR].enable    = (tsEnableMonitorModule == 1);
   tsModule[TSDB_MOD_MONITOR].name      = "monitor";
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index cd25ddcc5596b98e7ca93c15a9dcaf4d6b3a9608..1a40f3b56dcc82a89b66c0053d692bcbce57cd64 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -272,6 +272,13 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_SHOW_SQL_LEN         64
 #define TSDB_SLOW_QUERY_SQL_LEN   512
 
+#define TSDB_MQTT_HOSTNAME_LEN    64
+#define TSDB_MQTT_PORT_LEN        8
+#define TSDB_MQTT_USER_LEN        24
+#define TSDB_MQTT_PASS_LEN        24
+#define TSDB_MQTT_TOPIC_LEN       64
+#define TSDB_MQTT_CLIENT_ID_LEN   32
+
 #define TSDB_METER_STATE_OFFLINE  0
 #define TSDB_METER_STATE_ONLLINE  1
 
diff --git a/src/inc/tmqtt.h b/src/inc/tmqtt.h
index 401aac16c676f08496057e1a99be071cee1d7568..256e61fbae897cd77c1e7cc780c4c4c587293e28 100644
--- a/src/inc/tmqtt.h
+++ b/src/inc/tmqtt.h
@@ -19,11 +19,11 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-#include <stdint.h>
+
 int32_t mqttInitSystem();
 int32_t mqttStartSystem();
-void mqttStopSystem();
-void mqttCleanUpSystem();
+void    mqttStopSystem();
+void    mqttCleanUpSystem();
 
 #ifdef __cplusplus
 }
diff --git a/src/mnode/src/mnodeDb.c b/src/mnode/src/mnodeDb.c
index cdea9eda60a4537137058b307163199bff213051..8187cfd2651f55472f32a4e13aeec27b3e427421 100644
--- a/src/mnode/src/mnodeDb.c
+++ b/src/mnode/src/mnodeDb.c
@@ -310,6 +310,13 @@ static int32_t mnodeCheckDbCfg(SDbCfg *pCfg) {
     return TSDB_CODE_MND_INVALID_DB_OPTION;
   }
 
+#ifndef _SYNC
+  if (pCfg->replications != 1) {
+    mError("invalid db option replications:%d can only be 1 in this version", pCfg->replications);
+    return TSDB_CODE_MND_INVALID_DB_OPTION;
+  }
+#endif
+
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/src/mnode/src/mnodeDnode.c b/src/mnode/src/mnodeDnode.c
index d5b9d18e37263e01d70e9301898be2ca51b9a045..aaad2462ea996641fd2b8697547939fc0a08d457 100644
--- a/src/mnode/src/mnodeDnode.c
+++ b/src/mnode/src/mnodeDnode.c
@@ -78,6 +78,9 @@ static int32_t mnodeDnodeActionInsert(SSdbOper *pOper) {
 static int32_t mnodeDnodeActionDelete(SSdbOper *pOper) {
   SDnodeObj *pDnode = pOper->pObj;
  
+#ifndef _SYNC 
+  mnodeDropAllDnodeVgroups(pDnode);
+#endif  
   mnodeDropMnodeLocal(pDnode->dnodeId);
   balanceAsyncNotify();
 
@@ -585,7 +588,11 @@ static int32_t mnodeDropDnodeByEp(char *ep, SMnodeMsg *pMsg) {
 
   mInfo("dnode:%d, start to drop it", pDnode->dnodeId);
 
+#ifndef _SYNC
+  int32_t code = mnodeDropDnode(pDnode, pMsg);
+#else
   int32_t code = balanceDropDnode(pDnode);
+#endif  
   mnodeDecDnodeRef(pDnode);
   return code;
 }
@@ -1043,3 +1050,59 @@ static char* mnodeGetDnodeAlternativeRoleStr(int32_t alternativeRole) {
   }
 }
 
+#ifndef _SYNC
+
+int32_t balanceInit() { return TSDB_CODE_SUCCESS; }
+void    balanceCleanUp() {}
+void    balanceAsyncNotify() {}
+void    balanceSyncNotify() {}
+void    balanceReset() {}
+int32_t balanceAlterDnode(struct SDnodeObj *pDnode, int32_t vnodeId, int32_t dnodeId) { return TSDB_CODE_SYN_NOT_ENABLED; }
+
+char* syncRole[] = {
+  "offline",
+  "unsynced",
+  "syncing",
+  "slave",
+  "master"
+};
+
+int32_t balanceAllocVnodes(SVgObj *pVgroup) {
+  void *     pIter = NULL;
+  SDnodeObj *pDnode = NULL;
+  SDnodeObj *pSelDnode = NULL;
+  float      vnodeUsage = 1000.0;
+
+  while (1) {
+    pIter = mnodeGetNextDnode(pIter, &pDnode);
+    if (pDnode == NULL) break;
+
+    if (pDnode->numOfCores > 0 && pDnode->openVnodes < TSDB_MAX_VNODES) {
+      float openVnodes = pDnode->openVnodes;
+      if (pDnode->isMgmt) openVnodes += tsMnodeEqualVnodeNum;
+
+      float usage = openVnodes / pDnode->numOfCores;
+      if (usage <= vnodeUsage) {
+        pSelDnode = pDnode;
+        vnodeUsage = usage;
+      }
+    }
+    mnodeDecDnodeRef(pDnode);
+  }
+
+  sdbFreeIter(pIter);
+
+  if (pSelDnode == NULL) {
+    mError("failed to alloc vnode to vgroup");
+    return TSDB_CODE_MND_NO_ENOUGH_DNODES;
+  }
+
+  pVgroup->vnodeGid[0].dnodeId = pSelDnode->dnodeId;
+  pVgroup->vnodeGid[0].pDnode = pSelDnode;
+
+  mDebug("dnode:%d, alloc one vnode to vgroup, openVnodes:%d", pSelDnode->dnodeId, pSelDnode->openVnodes);
+  return TSDB_CODE_SUCCESS;
+}
+
+#endif 
+
diff --git a/src/mnode/src/mnodeProfile.c b/src/mnode/src/mnodeProfile.c
index 06f992c26a4b2fd6eec19abb9743e4add2536000..26f38dde034788fb440a785ce6c90e8aedf8ddca 100644
--- a/src/mnode/src/mnodeProfile.c
+++ b/src/mnode/src/mnodeProfile.c
@@ -98,8 +98,10 @@ SConnObj *mnodeCreateConn(char *user, uint32_t ip, uint16_t port) {
     .connId = connId,
     .stime  = taosGetTimestampMs()
   };
+
   tstrncpy(connObj.user, user, sizeof(connObj.user));
-  
+  connObj.lastAccess = connObj.stime;
+
   SConnObj *pConn = taosCachePut(tsMnodeConnCache, &connId, sizeof(int32_t), &connObj, sizeof(connObj), CONN_KEEP_TIME * 1000);
 
   mDebug("connId:%d, is created, user:%s ip:%s:%u", connId, user, taosIpStr(ip), port);
@@ -244,6 +246,7 @@ static int32_t mnodeRetrieveConns(SShowObj *pShow, char *data, int32_t rows, voi
     cols++;
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    if (pConnObj->lastAccess < pConnObj->stime) pConnObj->lastAccess = pConnObj->stime;
     *(int64_t *)pWrite = pConnObj->lastAccess;
     cols++;
 
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 03b1399ea75029f60d4026a1a2099288c805a2b2..4400927e9b02ba30196e0b04d485f894d23c8cf6 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1711,14 +1711,20 @@ static int32_t mnodeDoCreateChildTable(SMnodeMsg *pMsg, int32_t tid) {
       mnodeDestroyChildTable(pTable);
       return TSDB_CODE_MND_INVALID_TABLE_NAME;
     }
-    
+
     pTable->suid = pMsg->pSTable->uid;
-    pTable->uid  = (((uint64_t)pTable->vgId) << 40) + ((((uint64_t)pTable->sid) & ((1ul << 24) - 1ul)) << 16) +
-                  (sdbGetVersion() & ((1ul << 16) - 1ul));
+    pTable->uid = (((uint64_t)pTable->vgId) << 48) + ((((uint64_t)pTable->sid) & ((1ul << 24) - 1ul)) << 24) +
+                  ((sdbGetVersion() & ((1ul << 16) - 1ul)) << 8) + (taosRand() & ((1ul << 8) - 1ul));
     pTable->superTable = pMsg->pSTable;
   } else {
-    pTable->uid = (((uint64_t)pTable->vgId) << 40) + ((((uint64_t)pTable->sid) & ((1ul << 24) - 1ul)) << 16) +
-                  (sdbGetVersion() & ((1ul << 16) - 1ul));
+    if (pTable->info.type == TSDB_SUPER_TABLE) {
+      int64_t us = taosGetTimestampUs();
+      pTable->uid = (us << 24) + ((sdbGetVersion() & ((1ul << 16) - 1ul)) << 8) + (taosRand() & ((1ul << 8) - 1ul));
+    } else {
+      pTable->uid = (((uint64_t)pTable->vgId) << 48) + ((((uint64_t)pTable->sid) & ((1ul << 24) - 1ul)) << 24) +
+                    ((sdbGetVersion() & ((1ul << 16) - 1ul)) << 8) + (taosRand() & ((1ul << 8) - 1ul));
+    }
+
     pTable->sversion     = 0;
     pTable->numOfColumns = htons(pCreate->numOfColumns);
     pTable->sqlLen       = htons(pCreate->sqlLen);
diff --git a/src/mnode/src/mnodeUser.c b/src/mnode/src/mnodeUser.c
index f4cb1a9ef3d435cd044df03fd96835043b73ff71..c03ff688d2282f931706e80331a884439d78ee04 100644
--- a/src/mnode/src/mnodeUser.c
+++ b/src/mnode/src/mnodeUser.c
@@ -581,7 +581,7 @@ void mnodeDropAllUsers(SAcctObj *pAcct)  {
 int32_t mnodeRetriveAuth(char *user, char *spi, char *encrypt, char *secret, char *ckey) {
   if (!sdbIsMaster()) {
     *secret = 0;
-    mDebug("user:%s, failed to auth user, reason:%s", user, tstrerror(TSDB_CODE_APP_NOT_READY));
+    mDebug("user:%s, failed to auth user, mnode is not master", user);
     return TSDB_CODE_APP_NOT_READY;
   }
 
diff --git a/src/plugins/CMakeLists.txt b/src/plugins/CMakeLists.txt
index 2bc6bf54bfe9b330ede401cee521b0931f4be684..742235894a8781e4dcfa09cb86985c73df74d046 100644
--- a/src/plugins/CMakeLists.txt
+++ b/src/plugins/CMakeLists.txt
@@ -3,4 +3,6 @@ PROJECT(TDengine)
 
 ADD_SUBDIRECTORY(monitor)
 ADD_SUBDIRECTORY(http)
-ADD_SUBDIRECTORY(mqtt)
+IF (TD_MQTT)
+  ADD_SUBDIRECTORY(mqtt)
+ENDIF ()
\ No newline at end of file
diff --git a/src/plugins/http/CMakeLists.txt b/src/plugins/http/CMakeLists.txt
index 2c3cbf636fb318088fa0636bbbd4cac2372abcee..5d8b52986a6bb1cc451dac10cd92c8c37a352c4b 100644
--- a/src/plugins/http/CMakeLists.txt
+++ b/src/plugins/http/CMakeLists.txt
@@ -11,11 +11,12 @@ AUX_SOURCE_DIRECTORY(src SRC)
   
 IF (TD_LINUX)
   ADD_LIBRARY(http ${SRC})
+  TARGET_LINK_LIBRARIES(http z)
 
   IF (TD_SOMODE_STATIC)
-    TARGET_LINK_LIBRARIES(http taos_static z)
+    TARGET_LINK_LIBRARIES(http taos_static)
   ELSE ()  
-    TARGET_LINK_LIBRARIES(http taos z)
+    TARGET_LINK_LIBRARIES(http taos)
   ENDIF ()
 
   IF (TD_ADMIN)
diff --git a/src/plugins/monitor/CMakeLists.txt b/src/plugins/monitor/CMakeLists.txt
index 26a7775e9c42ef8752fb0e02e081896d6d3d9ed9..edea2187ea23caa5d809346a43d14f6ffaf8a309 100644
--- a/src/plugins/monitor/CMakeLists.txt
+++ b/src/plugins/monitor/CMakeLists.txt
@@ -2,11 +2,11 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
 AUX_SOURCE_DIRECTORY(./src SRC)
-  
+
 IF (TD_LINUX)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
   ADD_LIBRARY(monitor ${SRC})
   
   IF (TD_SOMODE_STATIC)
diff --git a/src/plugins/monitor/src/monitorMain.c b/src/plugins/monitor/src/monitorMain.c
index d76bb4bd82f34fe151a973208916f10b1e336ace..9c94bdc1fa254ff697caa9bdcb24f16aaa071997 100644
--- a/src/plugins/monitor/src/monitorMain.c
+++ b/src/plugins/monitor/src/monitorMain.c
@@ -25,6 +25,7 @@
 #include "tsclient.h"
 #include "dnode.h"
 #include "monitor.h"
+#include "taoserror.h"
 
 #define monitorFatal(...) { if (monitorDebugFlag & DEBUG_FATAL) { taosPrintLog("MON FATAL ", 255, __VA_ARGS__); }}
 #define monitorError(...) { if (monitorDebugFlag & DEBUG_ERROR) { taosPrintLog("MON ERROR ", 255, __VA_ARGS__); }}
@@ -33,129 +34,159 @@
 #define monitorDebug(...) { if (monitorDebugFlag & DEBUG_DEBUG) { taosPrintLog("MON ", monitorDebugFlag, __VA_ARGS__); }}
 #define monitorTrace(...) { if (monitorDebugFlag & DEBUG_TRACE) { taosPrintLog("MON ", monitorDebugFlag, __VA_ARGS__); }}
 
-#define SQL_LENGTH     1024
+#define SQL_LENGTH     1030
 #define LOG_LEN_STR    100
 #define IP_LEN_STR     TSDB_EP_LEN
 #define CHECK_INTERVAL 1000
 
 typedef enum {
-  MONITOR_CMD_CREATE_DB,
-  MONITOR_CMD_CREATE_TB_LOG,
-  MONITOR_CMD_CREATE_MT_DN,
-  MONITOR_CMD_CREATE_MT_ACCT,
-  MONITOR_CMD_CREATE_TB_DN,
-  MONITOR_CMD_CREATE_TB_ACCT_ROOT,
-  MONITOR_CMD_CREATE_TB_SLOWQUERY,
-  MONITOR_CMD_MAX
+  MON_CMD_CREATE_DB,
+  MON_CMD_CREATE_TB_LOG,
+  MON_CMD_CREATE_MT_DN,
+  MON_CMD_CREATE_MT_ACCT,
+  MON_CMD_CREATE_TB_DN,
+  MON_CMD_CREATE_TB_ACCT_ROOT,
+  MON_CMD_CREATE_TB_SLOWQUERY,
+  MON_CMD_MAX
 } EMonitorCommand;
 
 typedef enum {
-  MONITOR_STATE_UN_INIT,
-  MONITOR_STATE_INITIALIZING,
-  MONITOR_STATE_INITIALIZED,
-  MONITOR_STATE_STOPPED
+  MON_STATE_NOT_INIT,
+  MON_STATE_INITED
 } EMonitorState;
 
 typedef struct {
-  void * conn;
-  void * timer;
-  char   ep[TSDB_EP_LEN];
-  int8_t cmdIndex;
-  int8_t state;
-  char   sql[SQL_LENGTH + 1];
-  void * initTimer;
-  void * diskTimer;
+  pthread_t thread;
+  void *    conn;
+  char      ep[TSDB_EP_LEN];
+  int8_t    cmdIndex;
+  int8_t    state;
+  int8_t    start;   // enable/disable by mnode
+  int8_t    quiting; // taosd is quiting 
+  char      sql[SQL_LENGTH + 1];
 } SMonitorConn;
 
-static SMonitorConn tsMonitorConn;
-static void monitorInitConn(void *para, void *unused);
-static void monitorInitConnCb(void *param, TAOS_RES *result, int32_t code);
-static void monitorInitDatabase();
-static void monitorInitDatabaseCb(void *param, TAOS_RES *result, int32_t code);
-static void monitorStartTimer();
-static void monitorSaveSystemInfo();
+static SMonitorConn tsMonitor = {0};
+static void  monitorSaveSystemInfo();
+static void *monitorThreadFunc(void *param);
+static void  monitorBuildMonitorSql(char *sql, int32_t cmd);
 extern int32_t (*monitorStartSystemFp)();
-extern void (*monitorStopSystemFp)();
-extern void (*monitorExecuteSQLFp)(char *sql);
-
-static void monitorCheckDiskUsage(void *para, void *unused) {
-  taosGetDisk();
-  taosTmrReset(monitorCheckDiskUsage, CHECK_INTERVAL, NULL, tscTmr, &tsMonitorConn.diskTimer);
-}
+extern void    (*monitorStopSystemFp)();
+extern void    (*monitorExecuteSQLFp)(char *sql);
 
 int32_t monitorInitSystem() {
-  taos_init();
-  taosTmrReset(monitorCheckDiskUsage, CHECK_INTERVAL, NULL, tscTmr, &tsMonitorConn.diskTimer);
+  if (tsMonitor.ep[0] == 0) {
+    strcpy(tsMonitor.ep, tsLocalEp);
+  }
+
+  int len = strlen(tsMonitor.ep);
+  for (int i = 0; i < len; ++i) {
+    if (tsMonitor.ep[i] == ':' || tsMonitor.ep[i] == '-' || tsMonitor.ep[i] == '.') {
+      tsMonitor.ep[i] = '_';
+    }
+  }
+
+  pthread_attr_t thAttr;
+  pthread_attr_init(&thAttr);
+  pthread_attr_setdetachstate(&thAttr, PTHREAD_CREATE_JOINABLE);
+
+  if (pthread_create(&tsMonitor.thread, &thAttr, monitorThreadFunc, NULL)) {
+    monitorError("failed to create thread to for monitor module, reason:%s", strerror(errno));
+    return -1;
+  }
+
+  pthread_attr_destroy(&thAttr);
+  monitorDebug("monitor thread is launched");
+
   monitorStartSystemFp = monitorStartSystem;
   monitorStopSystemFp = monitorStopSystem;
   return 0;
 }
 
 int32_t monitorStartSystem() {
-  monitorInfo("start monitor module");
-  monitorInitSystem();
-  taosTmrReset(monitorInitConn, 10, NULL, tscTmr, &tsMonitorConn.initTimer);
+  taos_init();
+  tsMonitor.start = 1;
+  monitorExecuteSQLFp = monitorExecuteSQL;
+  monitorInfo("monitor module start");
   return 0;
 }
 
-static void monitorStartSystemRetry() {
-  if (tsMonitorConn.initTimer != NULL) {
-    taosTmrReset(monitorInitConn, 3000, NULL, tscTmr, &tsMonitorConn.initTimer);
-  }
-}
+static void *monitorThreadFunc(void *param) {
+  monitorDebug("starting to initialize monitor module ...");
 
-static void monitorInitConn(void *para, void *unused) {
-  if (dnodeGetDnodeId() <= 0) {
-    monitorStartSystemRetry();
-    return;
-  }
-  
-  monitorInfo("starting to initialize monitor service ..");
-  tsMonitorConn.state = MONITOR_STATE_INITIALIZING;
+  while (1) {
+    if (tsMonitor.quiting) {
+      tsMonitor.state = MON_STATE_NOT_INIT;
+      monitorInfo("monitor thread will quit, for taosd is quiting");
+      break;
+    } else {
+      taosGetDisk();
+    }
 
-  if (tsMonitorConn.ep[0] == 0) 
-    strcpy(tsMonitorConn.ep, tsLocalEp);
+    if (tsMonitor.start == 0) {
+      continue;
+    }
 
-  int len = strlen(tsMonitorConn.ep);
-  for (int i = 0; i < len; ++i) {
-    if (tsMonitorConn.ep[i] == ':' || tsMonitorConn.ep[i] == '-') {
-      tsMonitorConn.ep[i] = '_';
+    static int32_t accessTimes = 0;
+    accessTimes++;
+    taosMsleep(1000);
+
+    if (dnodeGetDnodeId() <= 0) {
+      monitorDebug("dnode not initialized, waiting for 3000 ms to start monitor module");
+      continue;
     }
-  }
 
-  if (tsMonitorConn.conn == NULL) {
-    taos_connect_a(NULL, "monitor", tsInternalPass, "", 0, monitorInitConnCb, &tsMonitorConn, &(tsMonitorConn.conn));
-  } else {
-    monitorInitDatabase();
-  }
-}
+    if (tsMonitor.conn == NULL) {
+      tsMonitor.state = MON_STATE_NOT_INIT;
+      tsMonitor.conn = taos_connect(NULL, "monitor", tsInternalPass, "", 0);
+      if (tsMonitor.conn == NULL) {
+        monitorError("failed to connect to database, reason:%s", tstrerror(terrno));
+        continue;
+      } else {
+        monitorDebug("connect to database success");
+      }
+    }
 
-static void monitorInitConnCb(void *param, TAOS_RES *result, int32_t code) {
-  // free it firstly in any cases.
-  taos_free_result(result);
+    if (tsMonitor.state == MON_STATE_NOT_INIT) {
+      for (; tsMonitor.cmdIndex < MON_CMD_MAX; ++tsMonitor.cmdIndex) {
+        monitorBuildMonitorSql(tsMonitor.sql, tsMonitor.cmdIndex);
+        void *res = taos_query(tsMonitor.conn, tsMonitor.sql);
+        int   code = taos_errno(res);
+        taos_free_result(res);
+
+        if (code != 0) {
+          monitorError("failed to exec sql:%s, reason:%s", tsMonitor.sql, tstrerror(code));
+          break;
+        } else {
+          monitorDebug("successfully to exec sql:%s", tsMonitor.sql);
+        }
+      }
+
+      if (tsMonitor.start) {
+        tsMonitor.state = MON_STATE_INITED;
+      }
+    }
 
-  if (code != TSDB_CODE_SUCCESS) {
-    monitorError("monitor:%p, connect to database failed, reason:%s", tsMonitorConn.conn, tstrerror(code));
-    taos_close(tsMonitorConn.conn);
-    tsMonitorConn.conn = NULL;
-    tsMonitorConn.state = MONITOR_STATE_UN_INIT;
-    monitorStartSystemRetry();
-    return;
+    if (tsMonitor.state == MON_STATE_INITED) {
+      if (accessTimes % tsMonitorInterval == 0) {
+        monitorSaveSystemInfo();
+      }
+    }
   }
 
-  monitorDebug("monitor:%p, connect to database success, reason:%s", tsMonitorConn.conn, tstrerror(code));
-  monitorInitDatabase();
+  monitorInfo("monitor thread is stopped");
+  return NULL;
 }
 
-static void dnodeBuildMonitorSql(char *sql, int32_t cmd) {
+static void monitorBuildMonitorSql(char *sql, int32_t cmd) {
   memset(sql, 0, SQL_LENGTH);
 
-  if (cmd == MONITOR_CMD_CREATE_DB) {
+  if (cmd == MON_CMD_CREATE_DB) {
     snprintf(sql, SQL_LENGTH,
              "create database if not exists %s replica 1 days 10 keep 30 cache %d "
-             "blocks %d maxtables 16 precision 'us'",
+             "blocks %d precision 'us'",
              tsMonitorDbName, TSDB_MIN_CACHE_BLOCK_SIZE, TSDB_MIN_TOTAL_BLOCKS);
-  } else if (cmd == MONITOR_CMD_CREATE_MT_DN) {
+  } else if (cmd == MON_CMD_CREATE_MT_DN) {
     snprintf(sql, SQL_LENGTH,
              "create table if not exists %s.dn(ts timestamp"
              ", cpu_taosd float, cpu_system float, cpu_cores int"
@@ -166,10 +197,10 @@ static void dnodeBuildMonitorSql(char *sql, int32_t cmd) {
              ", req_http int, req_select int, req_insert int"
              ") tags (dnodeid int, fqdn binary(%d))",
              tsMonitorDbName, TSDB_FQDN_LEN);
-  } else if (cmd == MONITOR_CMD_CREATE_TB_DN) {
+  } else if (cmd == MON_CMD_CREATE_TB_DN) {
     snprintf(sql, SQL_LENGTH, "create table if not exists %s.dn%d using %s.dn tags(%d, '%s')", tsMonitorDbName,
              dnodeGetDnodeId(), tsMonitorDbName, dnodeGetDnodeId(), tsLocalEp);
-  } else if (cmd == MONITOR_CMD_CREATE_MT_ACCT) {
+  } else if (cmd == MON_CMD_CREATE_MT_ACCT) {
     snprintf(sql, SQL_LENGTH,
              "create table if not exists %s.acct(ts timestamp "
              ", currentPointsPerSecond bigint, maxPointsPerSecond bigint"
@@ -185,15 +216,15 @@ static void dnodeBuildMonitorSql(char *sql, int32_t cmd) {
              ", accessState smallint"
              ") tags (acctId binary(%d))",
              tsMonitorDbName, TSDB_USER_LEN);
-  } else if (cmd == MONITOR_CMD_CREATE_TB_ACCT_ROOT) {
+  } else if (cmd == MON_CMD_CREATE_TB_ACCT_ROOT) {
     snprintf(sql, SQL_LENGTH, "create table if not exists %s.acct_%s using %s.acct tags('%s')", tsMonitorDbName, TSDB_DEFAULT_USER,
              tsMonitorDbName, TSDB_DEFAULT_USER);
-  } else if (cmd == MONITOR_CMD_CREATE_TB_SLOWQUERY) {
+  } else if (cmd == MON_CMD_CREATE_TB_SLOWQUERY) {
     snprintf(sql, SQL_LENGTH,
              "create table if not exists %s.slowquery(ts timestamp, username "
              "binary(%d), created_time timestamp, time bigint, sql binary(%d))",
              tsMonitorDbName, TSDB_TABLE_FNAME_LEN - 1, TSDB_SLOW_QUERY_SQL_LEN);
-  } else if (cmd == MONITOR_CMD_CREATE_TB_LOG) {
+  } else if (cmd == MON_CMD_CREATE_TB_LOG) {
     snprintf(sql, SQL_LENGTH,
              "create table if not exists %s.log(ts timestamp, level tinyint, "
              "content binary(%d), ipaddr binary(%d))",
@@ -203,75 +234,22 @@ static void dnodeBuildMonitorSql(char *sql, int32_t cmd) {
   sql[SQL_LENGTH] = 0;
 }
 
-static void monitorInitDatabase() {
-  if (tsMonitorConn.cmdIndex < MONITOR_CMD_MAX) {
-    dnodeBuildMonitorSql(tsMonitorConn.sql, tsMonitorConn.cmdIndex);
-    taos_query_a(tsMonitorConn.conn, tsMonitorConn.sql, monitorInitDatabaseCb, NULL);
-  } else {
-    tsMonitorConn.state = MONITOR_STATE_INITIALIZED;
-    monitorExecuteSQLFp = monitorExecuteSQL;
-    monitorInfo("monitor service init success");
-
-    monitorStartTimer();
-  }
-}
-
-static void monitorInitDatabaseCb(void *param, TAOS_RES *result, int32_t code) {
-  if (code == TSDB_CODE_MND_TABLE_ALREADY_EXIST || code == TSDB_CODE_MND_DB_ALREADY_EXIST || code >= 0) {
-    monitorDebug("monitor:%p, sql success, reason:%s, %s", tsMonitorConn.conn, tstrerror(code), tsMonitorConn.sql);
-    if (tsMonitorConn.cmdIndex == MONITOR_CMD_CREATE_TB_LOG) {
-      monitorInfo("dnode:%s is started", tsLocalEp);
-    }
-    tsMonitorConn.cmdIndex++;
-    monitorInitDatabase();
-  } else {
-    monitorError("monitor:%p, sql failed, reason:%s, %s", tsMonitorConn.conn, tstrerror(code), tsMonitorConn.sql);
-    tsMonitorConn.state = MONITOR_STATE_UN_INIT;
-    monitorStartSystemRetry();
-  }
-
-  taos_free_result(result);
-}
-
 void monitorStopSystem() {
-  if (tsMonitorConn.state == MONITOR_STATE_STOPPED) return;
-  tsMonitorConn.state = MONITOR_STATE_STOPPED;
+  tsMonitor.start = 0;
+  tsMonitor.state = MON_STATE_NOT_INIT;
   monitorExecuteSQLFp = NULL;
-
-  monitorInfo("monitor module is stopped");
-
-  if (tsMonitorConn.initTimer != NULL) {
-    taosTmrStopA(&(tsMonitorConn.initTimer));
-  }
-  if (tsMonitorConn.timer != NULL) {
-    taosTmrStopA(&(tsMonitorConn.timer));
-  }
-  if (tsMonitorConn.conn != NULL) {
-    taos_close(tsMonitorConn.conn);
-    tsMonitorConn.conn = NULL;
-  }
+  monitorInfo("monitor module stopped");
 }
 
 void monitorCleanUpSystem() {
+  tsMonitor.quiting = 1;
   monitorStopSystem();
-  monitorInfo("monitor module cleanup");
-}
-
-static void monitorStartTimer() {
-  taosTmrReset(monitorSaveSystemInfo, tsMonitorInterval * 1000, NULL, tscTmr, &tsMonitorConn.timer);
-}
-
-static void dnodeMontiorLogCallback(void *param, TAOS_RES *result, int32_t code) {
-  int32_t c = taos_errno(result);
-
-  if (c != TSDB_CODE_SUCCESS) {
-    monitorError("monitor:%p, save %s failed, reason:%s", tsMonitorConn.conn, (char *)param, tstrerror(c));
-  } else {
-    int32_t rows = taos_affected_rows(result);
-    monitorDebug("monitor:%p, save %s succ, rows:%d", tsMonitorConn.conn, (char *)param, rows);
+  pthread_join(tsMonitor.thread, NULL);
+  if (tsMonitor.conn != NULL) {
+    taos_close(tsMonitor.conn);
+    tsMonitor.conn = NULL;
   }
-
-  taos_free_result(result);
+  monitorInfo("monitor module is cleaned up");
 }
 
 // unit is MB
@@ -279,13 +257,13 @@ static int32_t monitorBuildMemorySql(char *sql) {
   float sysMemoryUsedMB = 0;
   bool  suc = taosGetSysMemory(&sysMemoryUsedMB);
   if (!suc) {
-    monitorError("monitor:%p, get sys memory info failed.", tsMonitorConn.conn);
+    monitorDebug("failed to get sys memory info");
   }
 
   float procMemoryUsedMB = 0;
   suc = taosGetProcMemory(&procMemoryUsedMB);
   if (!suc) {
-    monitorError("monitor:%p, get proc memory info failed.", tsMonitorConn.conn);
+    monitorDebug("failed to get proc memory info");
   }
 
   return sprintf(sql, ", %f, %f, %d", procMemoryUsedMB, sysMemoryUsedMB, tsTotalMemoryMB);
@@ -296,11 +274,11 @@ static int32_t monitorBuildCpuSql(char *sql) {
   float sysCpuUsage = 0, procCpuUsage = 0;
   bool  suc = taosGetCpuUsage(&sysCpuUsage, &procCpuUsage);
   if (!suc) {
-    monitorError("monitor:%p, get cpu usage failed.", tsMonitorConn.conn);
+    monitorDebug("failed to get cpu usage");
   }
 
   if (sysCpuUsage <= procCpuUsage) {
-    sysCpuUsage = procCpuUsage + (float)0.1;
+    sysCpuUsage = procCpuUsage + 0.1f;
   }
 
   return sprintf(sql, ", %f, %f, %d", procCpuUsage, sysCpuUsage, tsNumOfCores);
@@ -316,14 +294,14 @@ static int32_t monitorBuildBandSql(char *sql) {
   float bandSpeedKb = 0;
   bool  suc = taosGetBandSpeed(&bandSpeedKb);
   if (!suc) {
-    monitorError("monitor:%p, get bandwidth speed failed.", tsMonitorConn.conn);
+    monitorDebug("failed to get bandwidth speed");
   }
 
   return sprintf(sql, ", %f", bandSpeedKb);
 }
 
 static int32_t monitorBuildReqSql(char *sql) {
-  SDnodeStatisInfo info = dnodeGetStatisInfo(); 
+  SDnodeStatisInfo info = dnodeGetStatisInfo();
   return sprintf(sql, ", %d, %d, %d)", info.httpReqNum, info.queryReqNum, info.submitReqNum);
 }
 
@@ -331,20 +309,15 @@ static int32_t monitorBuildIoSql(char *sql) {
   float readKB = 0, writeKB = 0;
   bool  suc = taosGetProcIO(&readKB, &writeKB);
   if (!suc) {
-    monitorError("monitor:%p, get io info failed.", tsMonitorConn.conn);
+    monitorDebug("failed to get io info");
   }
 
   return sprintf(sql, ", %f, %f", readKB, writeKB);
 }
 
 static void monitorSaveSystemInfo() {
-  if (tsMonitorConn.state != MONITOR_STATE_INITIALIZED) {
-    monitorStartTimer();
-    return;
-  }
-
   int64_t ts = taosGetTimestampUs();
-  char *  sql = tsMonitorConn.sql;
+  char *  sql = tsMonitor.sql;
   int32_t pos = snprintf(sql, SQL_LENGTH, "insert into %s.dn%d values(%" PRId64, tsMonitorDbName, dnodeGetDnodeId(), ts);
 
   pos += monitorBuildCpuSql(sql + pos);
@@ -354,16 +327,31 @@ static void monitorSaveSystemInfo() {
   pos += monitorBuildIoSql(sql + pos);
   pos += monitorBuildReqSql(sql + pos);
 
-  monitorDebug("monitor:%p, save system info, sql:%s", tsMonitorConn.conn, sql);
-  taos_query_a(tsMonitorConn.conn, sql, dnodeMontiorLogCallback, "sys");
+  void *res = taos_query(tsMonitor.conn, tsMonitor.sql);
+  int   code = taos_errno(res);
+  taos_free_result(res);
+
+  if (code != 0) {
+    monitorError("failed to save system info, reason:%s, sql:%s", tstrerror(code), tsMonitor.sql);
+  } else {
+    monitorDebug("successfully to save system info, sql:%s", tsMonitor.sql);
+  }
+}
 
-  if (tsMonitorConn.timer != NULL && tsMonitorConn.state != MONITOR_STATE_STOPPED) {
-    monitorStartTimer();
+static void montiorExecSqlCb(void *param, TAOS_RES *result, int32_t code) {
+  int32_t c = taos_errno(result);
+  if (c != TSDB_CODE_SUCCESS) {
+    monitorError("save %s failed, reason:%s", (char *)param, tstrerror(c));
+  } else {
+    int32_t rows = taos_affected_rows(result);
+    monitorDebug("save %s succ, rows:%d", (char *)param, rows);
   }
+
+  taos_free_result(result);
 }
 
 void monitorSaveAcctLog(SAcctMonitorObj *pMon) {
-  if (tsMonitorConn.state != MONITOR_STATE_INITIALIZED) return;
+  if (tsMonitor.state != MON_STATE_INITED) return;
 
   char sql[1024] = {0};
   sprintf(sql,
@@ -392,19 +380,16 @@ void monitorSaveAcctLog(SAcctMonitorObj *pMon) {
           pMon->totalConns, pMon->maxConns,
           pMon->accessState);
 
-  monitorDebug("monitor:%p, save account info, sql %s", tsMonitorConn.conn, sql);
-  taos_query_a(tsMonitorConn.conn, sql, dnodeMontiorLogCallback, "account");
+  monitorDebug("save account info, sql:%s", sql);
+  taos_query_a(tsMonitor.conn, sql, montiorExecSqlCb, "account info");
 }
 
 void monitorSaveLog(int32_t level, const char *const format, ...) {
-  if (tsMonitorConn.state != MONITOR_STATE_INITIALIZED) return;
+  if (tsMonitor.state != MON_STATE_INITED) return;
 
   va_list argpointer;
   char    sql[SQL_LENGTH] = {0};
   int32_t max_length = SQL_LENGTH - 30;
-
-  if (tsMonitorConn.state != MONITOR_STATE_INITIALIZED) return;
-
   int32_t len = snprintf(sql, (size_t)max_length, "insert into %s.log values(%" PRId64 ", %d,'", tsMonitorDbName,
                          taosGetTimestampUs(), level);
 
@@ -416,12 +401,13 @@ void monitorSaveLog(int32_t level, const char *const format, ...) {
   len += sprintf(sql + len, "', '%s')", tsLocalEp);
   sql[len++] = 0;
 
-  monitorDebug("monitor:%p, save log, sql: %s", tsMonitorConn.conn, sql);
-  taos_query_a(tsMonitorConn.conn, sql, dnodeMontiorLogCallback, "log");
+  monitorDebug("save log, sql: %s", sql);
+  taos_query_a(tsMonitor.conn, sql, montiorExecSqlCb, "log");
 }
 
 void monitorExecuteSQL(char *sql) {
-  if (tsMonitorConn.state != MONITOR_STATE_INITIALIZED) return;
-  monitorDebug("monitor:%p, execute sql: %s", tsMonitorConn.conn, sql);
-  taos_query_a(tsMonitorConn.conn, sql, dnodeMontiorLogCallback, "sql");
+  if (tsMonitor.state != MON_STATE_INITED) return;
+
+  monitorDebug("execute sql:%s", sql);
+  taos_query_a(tsMonitor.conn, sql, montiorExecSqlCb, "sql");
 }
diff --git a/src/plugins/mqtt/CMakeLists.txt b/src/plugins/mqtt/CMakeLists.txt
index 2467af588ceb8fe68c590adcc7acd769d6fa0109..cf5729d6087065bd38a5bed140ec01b1b531f454 100644
--- a/src/plugins/mqtt/CMakeLists.txt
+++ b/src/plugins/mqtt/CMakeLists.txt
@@ -2,21 +2,19 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MQTT-C/include)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MQTT-C/examples/templates)
 AUX_SOURCE_DIRECTORY(src SRC)
 
 IF (TD_LINUX)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/client/inc)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MQTT-C/include)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MQTT-C/examples/templates)
   ADD_LIBRARY(mqtt ${SRC})
+  TARGET_LINK_LIBRARIES(mqtt cJson mqttc)
 
   IF (TD_SOMODE_STATIC)
-    TARGET_LINK_LIBRARIES(mqtt taos_static cJson mqttc)
+    TARGET_LINK_LIBRARIES(mqtt taos_static)
   ELSE ()
-    TARGET_LINK_LIBRARIES(mqtt taos cJson mqttc)
-  ENDIF ()
-  IF (TD_ADMIN)
-    TARGET_LINK_LIBRARIES(mqtt admin cJson)
+    TARGET_LINK_LIBRARIES(mqtt taos)
   ENDIF ()
 ENDIF ()
diff --git a/src/plugins/mqtt/inc/mqttInit.h b/src/plugins/mqtt/inc/mqttInit.h
index 5dbd62789bd3d5c70e25863b9c24c028333f8b2f..81a9a39a2ce04c66934c4bd25ed67bdb51c77ba3 100644
--- a/src/plugins/mqtt/inc/mqttInit.h
+++ b/src/plugins/mqtt/inc/mqttInit.h
@@ -23,11 +23,12 @@ extern "C" {
  * @file
  * A simple subscriber program that performs automatic reconnections.
  */
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
 #include "mqtt.h"
-#include "taos.h"
+
+#define QOS                1
+#define TIMEOUT            10000L
+#define MQTT_SEND_BUF_SIZE 102400
+#define MQTT_RECV_BUF_SIZE 102400
 
 /**
  * @brief A structure that I will use to keep track of some data needed
@@ -36,18 +37,12 @@ extern "C" {
  * An instance of this struct will be created in my \c main(). Then, whenever
  * \ref mqttReconnectClient is called, this instance will be passed.
  */
-struct reconnect_state_t {
-  char*    hostname;
-  char*    port;
-  char*    topic;
-  char*    client_id;
-  char*    user_name;
-  char*    password;
+typedef struct SMqttReconnectState {
   uint8_t* sendbuf;
   size_t   sendbufsz;
   uint8_t* recvbuf;
   size_t   recvbufsz;
-};
+} SMqttReconnectState;
 
 /**
  * @brief My reconnect callback. It will reestablish the connection whenever
@@ -58,7 +53,7 @@ void mqttReconnectClient(struct mqtt_client* client, void** reconnect_state_vptr
 /**
  * @brief The function will be called whenever a PUBLISH message is received.
  */
-void mqtt_PublishCallback(void** unused, struct mqtt_response_publish* published);
+void mqttPublishCallback(void** unused, struct mqtt_response_publish* published);
 
 /**
  * @brief The client's refresher. This function triggers back-end routines to
@@ -73,12 +68,7 @@ void* mqttClientRefresher(void* client);
 /**
  * @brief Safelty closes the \p sockfd and cancels the \p client_daemon before \c exit.
  */
-
-void mqttCleanup(int status, int sockfd, pthread_t* client_daemon);
-void mqttInitConnCb(void* param, TAOS_RES* result, int32_t code);
-void mqttQueryInsertCallback(void* param, TAOS_RES* result, int32_t code);
-#define QOS 1
-#define TIMEOUT 10000L
+void mqttCleanupRes(int status, int sockfd, pthread_t* client_daemon);
 
 #ifdef __cplusplus
 }
diff --git a/src/plugins/mqtt/inc/mqttPayload.h b/src/plugins/mqtt/inc/mqttPayload.h
index b7e7abbd96b9fb6fabbd52f34dc58b2719912ee7..12a714afac52d1814f3cbf82ade610ec8af07953 100644
--- a/src/plugins/mqtt/inc/mqttPayload.h
+++ b/src/plugins/mqtt/inc/mqttPayload.h
@@ -15,11 +15,13 @@
 
 #ifndef TDENGINE_MQTT_PLYLOAD_H
 #define TDENGINE_MQTT_PLYLOAD_H
+
 #ifdef __cplusplus
 extern "C" {
 #endif
-char  split(char str[], char delims[], char** p_p_cmd_part, int max);
-char* converJsonToSql(char* json, char* _dbname, char* _tablename);
+
+char* mqttConverJsonToSql(char* json, int maxSize);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/plugins/mqtt/inc/mqttSystem.h b/src/plugins/mqtt/inc/mqttSystem.h
deleted file mode 100644
index a79fac33b57c3eb484b0fe84e09e4c389a211861..0000000000000000000000000000000000000000
--- a/src/plugins/mqtt/inc/mqttSystem.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef TDENGINE_MQTT_SYSTEM_H
-#define TDENGINE_MQTT_SYSTEM_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-#include <stdint.h>
-int32_t mqttInitSystem();
-int32_t mqttStartSystem();
-void    mqttStopSystem();
-void    mqttCleanUpSystem();
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/src/plugins/mqtt/src/mqttPayload.c b/src/plugins/mqtt/src/mqttPayload.c
index 96c8e71edd3a1faeff5487d18d64260092803fba..1af8b02fad7492da5664628b534b890732acbe3a 100644
--- a/src/plugins/mqtt/src/mqttPayload.c
+++ b/src/plugins/mqtt/src/mqttPayload.c
@@ -14,52 +14,146 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "mqttPayload.h"
+#include "os.h"
 #include "cJSON.h"
-#include "string.h"
-#include "taos.h"
 #include "mqttLog.h"
-#include "os.h"
-char split(char str[], char delims[], char** p_p_cmd_part, int max) {
-  char*  token = strtok(str, delims);
-  char   part_index = 0;
-  char** tmp_part = p_p_cmd_part;
-  while (token) {
-    *tmp_part++ = token;
-    token = strtok(NULL, delims);
-    part_index++;
-    if (part_index >= max) break;
-  }
-  return part_index;
+#include "mqttPayload.h"
+
+// subscribe message like this
+
+/*
+/test {
+    "timestamp": 1599121290,
+    "gateway": {
+        "name": "AcuLink 810 Gateway",
+        "model": "AcuLink810-868",
+        "serial": "S8P20200207"
+    },
+    "device": {
+        "name": "Acuvim L V3 .221",
+        "model": "Acuvim-L-V3",
+        "serial": "221",
+        "online": true,
+        "readings": [
+            {
+                "param": "Freq_Hz",
+                "value": "59.977539",
+                "unit": "Hz"
+            },
+            {
+                "param": "Va_V",
+                "value": "122.002907",
+                "unit": "V"
+            },
+            {
+                "param": "DI4",
+                "value": "5.000000",
+                "unit": ""
+            }
+        ]
+    }
 }
+*/
+
+// send msg cmd
+// mosquitto_pub -h test.mosquitto.org  -t "/test" -m '{"timestamp": 1599121290,"gateway": {"name": "AcuLink 810 Gateway","model": "AcuLink810-868","serial": "S8P20200207"},"device": {"name": "Acuvim L V3 .221","model": "Acuvim-L-V3","serial": "221","online": true,"readings": [{"param": "Freq_Hz","value": "59.977539","unit": "Hz"},{"param": "Va_V","value": "122.002907","unit": "V"},{"param": "DI4","value": "5.000000","unit": ""}]}}'
+
+/*
+ * This is an example, this function needs to be implemented in order to parse the json file into a sql statement
+ * Note that you need to create a super table and database before writing data
+ * In this case:
+ *   create database mqttdb;
+ *   create table mqttdb.devices(ts timestamp, value bigint) tags(name binary(32), model binary(32), serial binary(16), param binary(16), unit binary(16));
+ */
+
+char* mqttConverJsonToSql(char* json, int maxSize) {
+  // const int32_t maxSize = 10240;
+  maxSize *= 5;
+  char* sql = malloc(maxSize);
+
+  cJSON* root = cJSON_Parse(json);
+  if (root == NULL) {
+    mqttError("failed to parse msg, invalid json format");
+    goto MQTT_PARSE_OVER;
+  }
+
+  cJSON* timestamp = cJSON_GetObjectItem(root, "timestamp");
+  if (!timestamp || timestamp->type != cJSON_Number) {
+    mqttError("failed to parse msg, timestamp not found");
+    goto MQTT_PARSE_OVER;
+  }
+
+  cJSON* device = cJSON_GetObjectItem(root, "device");
+  if (!device) {
+    mqttError("failed to parse msg, device not found");
+    goto MQTT_PARSE_OVER;
+  }
 
-char* converJsonToSql(char* json, char* _dbname, char* _tablename) {
-  cJSON* jPlayload = cJSON_Parse(json);
-  char   _names[102400] = {0};
-  char   _values[102400] = {0};
-  int    i = 0;
-  int    count = cJSON_GetArraySize(jPlayload);
-  for (; i < count; i++)  
-  {
-    cJSON* item = cJSON_GetArrayItem(jPlayload, i);
-    if (cJSON_Object == item->type) {
-      mqttInfo("The item '%s' is not supported", item->string);
-    } else {
-      strcat(_names, item->string);
-      if (i < count - 1) {
-        strcat(_names, ",");
-      }
-      char* __value_json = cJSON_Print(item);
-      strcat(_values, __value_json);
-      free(__value_json);
-      if (i < count - 1) {
-        strcat(_values, ",");
-      }
+  cJSON* name = cJSON_GetObjectItem(device, "name");
+  if (!name || name->type != cJSON_String) {
+    mqttError("failed to parse msg, name not found");
+    goto MQTT_PARSE_OVER;
+  }
+
+  cJSON* model = cJSON_GetObjectItem(device, "model");
+  if (!model || model->type != cJSON_String) {
+    mqttError("failed to parse msg, model not found");
+    goto MQTT_PARSE_OVER;
+  }
+
+  cJSON* serial = cJSON_GetObjectItem(device, "serial");
+  if (!serial || serial->type != cJSON_String) {
+    mqttError("failed to parse msg, serial not found");
+    goto MQTT_PARSE_OVER;
+  }
+
+  cJSON* readings = cJSON_GetObjectItem(device, "readings");
+  if (!readings || readings->type != cJSON_Array) {
+    mqttError("failed to parse msg, readings not found");
+    goto MQTT_PARSE_OVER;
+  }
+
+  int count = cJSON_GetArraySize(readings);
+  if (count <= 0) {
+    mqttError("failed to parse msg, readings size smaller than 0");
+    goto MQTT_PARSE_OVER;
+  }
+
+  int len = snprintf(sql, maxSize, "insert into");
+
+  for (int i = 0; i < count; ++i) {
+    cJSON* reading = cJSON_GetArrayItem(readings, i);
+    if (reading == NULL) continue;
+
+    cJSON* param = cJSON_GetObjectItem(reading, "param");
+    if (!param || param->type != cJSON_String) {
+      mqttError("failed to parse msg, param not found");
+      goto MQTT_PARSE_OVER;
     }
+
+    cJSON* value = cJSON_GetObjectItem(reading, "value");
+    if (!value || value->type != cJSON_String) {
+      mqttError("failed to parse msg, value not found");
+      goto MQTT_PARSE_OVER;
+    }
+
+    cJSON* unit = cJSON_GetObjectItem(reading, "unit");
+    if (!unit || unit->type != cJSON_String) {
+      mqttError("failed to parse msg, unit not found");
+      goto MQTT_PARSE_OVER;
+    }
+
+    len += snprintf(sql + len, maxSize - len,
+        " mqttdb.serial_%s_%s using mqttdb.devices tags('%s', '%s', '%s', '%s', '%s') values(%" PRId64 ", %s)",
+        serial->valuestring, param->valuestring, name->valuestring, model->valuestring, serial->valuestring,
+        param->valuestring, unit->valuestring, timestamp->valueint * 1000, value->valuestring);
   }
-  cJSON_free(jPlayload);
-  int   sqllen = strlen(_names) + strlen(_values) + strlen(_dbname) + strlen(_tablename) + 1024;
-  char* _sql = calloc(1, sqllen);
-  sprintf(_sql, "INSERT INTO %s.%s (%s) VALUES(%s);", _dbname, _tablename, _names, _values);
-  return _sql;
+
+  cJSON_free(root);
+  return sql;
+
+MQTT_PARSE_OVER:
+  cJSON_free(root);
+  free(sql);
+  return NULL;
 }
\ No newline at end of file
diff --git a/src/plugins/mqtt/src/mqttSystem.c b/src/plugins/mqtt/src/mqttSystem.c
index 69810e27858040391e80fd39fea6af1ea8d4d96c..eacc3b1f74cdfc0d00bb53a38beb8c85b164e200 100644
--- a/src/plugins/mqtt/src/mqttSystem.c
+++ b/src/plugins/mqtt/src/mqttSystem.c
@@ -14,244 +14,131 @@
  */
 
 #define _DEFAULT_SOURCE
-
-#include "cJSON.h"
+#include "os.h"
 #include "mqtt.h"
 #include "mqttInit.h"
 #include "mqttLog.h"
 #include "mqttPayload.h"
-#include "os.h"
+#include "tmqtt.h"
 #include "posix_sockets.h"
-#include "string.h"
 #include "taos.h"
 #include "tglobal.h"
-#include "tmqtt.h"
-#include "tsclient.h"
-#include "tsocket.h"
-#include "ttimer.h"
-#include "mqttSystem.h"
-struct mqtt_client       mqttClient = {0};
-pthread_t                clientDaemonThread = {0};
-void*                    mqttConnect=NULL;
-struct reconnect_state_t recntStatus = {0};
-char*                    topicPath=NULL;
-int                      mttIsRuning = 1;
+#include "taoserror.h"
 
-int32_t mqttInitSystem() {
-  int   rc = 0;
-#if 0
-  uint8_t sendbuf[2048];
-  uint8_t recvbuf[1024];
-  recntStatus.sendbuf = sendbuf;
-  recntStatus.sendbufsz = sizeof(sendbuf);
-  recntStatus.recvbuf = recvbuf;
-  recntStatus.recvbufsz = sizeof(recvbuf);
-  char* url = tsMqttBrokerAddress;
-  recntStatus.user_name = strstr(url, "@") != NULL ? strbetween(url, "//", ":") : NULL;
-  
-  char * passStr = strstr(url, recntStatus.user_name);
-  if (passStr != NULL) {
-    recntStatus.password = strstr(url, "@") != NULL ? strbetween(passStr, ":", "@") : NULL;
-  }
+struct SMqttReconnectState tsMqttStatus = {0};
+struct mqtt_client tsMqttClient = {0};
+static pthread_t   tsMqttClientDaemonThread = {0};
+static void*       tsMqttConnect = NULL;
+static bool        tsMqttIsRuning = false;
 
-  if (strlen(url) == 0) {
-    mqttDebug("mqtt module not init, url is null");
-    return rc;
-  }
-
-  if (strstr(url, "@") != NULL) {
-    recntStatus.hostname = strbetween(url, "@", ":");
-  } else if (strstr(strstr(url, "://") + 3, ":") != NULL) {
-    recntStatus.hostname = strbetween(url, "//", ":");
-
-  } else {
-    recntStatus.hostname = strbetween(url, "//", "/");
-  }
+int32_t mqttInitSystem() { return 0; }
 
-  char* _begin_hostname = strstr(url, recntStatus.hostname);
-  if (_begin_hostname != NULL && strstr(_begin_hostname, ":") != NULL) {
-    recntStatus.port = strbetween(_begin_hostname, ":", "/");
-  } else {
-    recntStatus.port = strbetween("'1883'", "'", "'");
-  }
+int32_t mqttStartSystem() {
+  tsMqttStatus.sendbufsz = MQTT_SEND_BUF_SIZE;
+  tsMqttStatus.recvbufsz = MQTT_RECV_BUF_SIZE;
+  tsMqttStatus.sendbuf = malloc(MQTT_SEND_BUF_SIZE);
+  tsMqttStatus.recvbuf = malloc(MQTT_RECV_BUF_SIZE);
+  tsMqttIsRuning = true;
 
-  char* portStr = recntStatus.hostname;
-  if (_begin_hostname != NULL) {
-    char* colonStr = strstr(_begin_hostname, ":");
-    if (colonStr != NULL) {
-      portStr = recntStatus.port;
-    }
+  mqtt_init_reconnect(&tsMqttClient, mqttReconnectClient, &tsMqttStatus, mqttPublishCallback);
+  if (pthread_create(&tsMqttClientDaemonThread, NULL, mqttClientRefresher, &tsMqttClient)) {
+    mqttError("mqtt failed to start daemon.");
+    mqttCleanupRes(EXIT_FAILURE, -1, NULL);
+    return -1;
   }
 
-  char* topicStr = strstr(url, portStr);
-  if (topicStr != NULL) {
-    topicPath = strbetween(topicStr, "/", "/");
-    char* _topic = "+/+/+/";
-    int   _tpsize = strlen(topicPath) + strlen(_topic) + 1;
-    recntStatus.topic = calloc(1, _tpsize);
-    sprintf(recntStatus.topic, "/%s/%s", topicPath, _topic);
-    recntStatus.client_id = strlen(tsMqttBrokerClientId) < 3 ? tsMqttBrokerClientId : "taos_mqtt";
-    mqttConnect = NULL;
-  } else {
-    topicPath = NULL;
-  }
-  
-#endif  
-  return rc;
+  mqttInfo("mqtt listening for topic:%s messages", tsMqttTopic);
+  return 0;
 }
 
-int32_t mqttStartSystem() {
-  int rc = 0;
-#if 0  
-  if (recntStatus.user_name != NULL && recntStatus.password != NULL) {
-    mqttInfo("connecting to  mqtt://%s:%s@%s:%s/%s/", recntStatus.user_name, recntStatus.password,
-              recntStatus.hostname, recntStatus.port, topicPath);
-  } else if (recntStatus.user_name != NULL && recntStatus.password == NULL) {
-    mqttInfo("connecting to  mqtt://%s@%s:%s/%s/", recntStatus.user_name, recntStatus.hostname, recntStatus.port,
-              topicPath);
-  }
+void mqttStopSystem() {
+  if (tsMqttIsRuning) {
+    tsMqttIsRuning = false;
+    tsMqttClient.error = MQTT_ERROR_SOCKET_ERROR;
 
-  mqtt_init_reconnect(&mqttClient, mqttReconnectClient, &recntStatus, mqtt_PublishCallback);
-  if (pthread_create(&clientDaemonThread, NULL, mqttClientRefresher, &mqttClient)) {
-    mqttError("Failed to start client daemon.");
-    mqttCleanup(EXIT_FAILURE, -1, NULL);
-    rc = -1;
-  } else {
-    mqttInfo("listening for '%s' messages.", recntStatus.topic);
-  }
-#endif
-  return rc;
-}
+    taosMsleep(300);
+    mqttCleanupRes(EXIT_SUCCESS, tsMqttClient.socketfd, &tsMqttClientDaemonThread);
 
-void mqttStopSystem() {
-#if 0  
-  mqttClient.error = MQTT_ERROR_SOCKET_ERROR;
-  mttIsRuning = 0;
-  usleep(300000U);
-  mqttCleanup(EXIT_SUCCESS, mqttClient.socketfd, &clientDaemonThread);
-  mqttInfo("mqtt is stoped");
-#endif  
+    mqttInfo("mqtt is stopped");
+  }
 }
 
 void mqttCleanUpSystem() {
-#if 0
-  mqttInfo("starting to cleanup mqtt");
-  free(recntStatus.user_name);
-  free(recntStatus.password);
-  free(recntStatus.hostname);
-  free(recntStatus.port);
-  free(recntStatus.topic);
-  free(topicPath);
+  mqttStopSystem();
   mqttInfo("mqtt is cleaned up");
-#endif  
 }
 
-void mqtt_PublishCallback(void** unused, struct mqtt_response_publish* published) {
-  /* note that published->topic_name is NOT null-terminated (here we'll change it to a c-string) */
-  char* topic_name = (char*)malloc(published->topic_name_size + 1);
-  memcpy(topic_name, published->topic_name, published->topic_name_size);
-  topic_name[published->topic_name_size] = '\0';
-  mqttInfo("received publish('%s'): %s", topic_name, (const char*)published->application_message);
-  char _token[128] = {0};
-  char _dbname[128] = {0};
-  char _tablename[128] = {0};
-  if (mqttConnect == NULL) {
-    mqttInfo("connect database");
-    taos_connect_a(NULL, "_root", tsInternalPass, "", 0, mqttInitConnCb, &mqttClient, &mqttConnect);
-  }
-  if (topic_name[1]=='/' &&  strncmp((char*)&topic_name[1], topicPath, strlen(topicPath)) == 0) {
-    char* p_p_cmd_part[5] = {0};
-    char  copystr[1024] = {0};
-    strncpy(copystr, topic_name, MIN(1024, published->topic_name_size));
-    char part_index = split(copystr, "/", p_p_cmd_part, 10);
-    if (part_index < 4) {
-      mqttError("The topic %s is't format '/path/token/dbname/table name/'. for expmle: '/taos/token/db/t'", topic_name);
+void mqttPublishCallback(void** unused, struct mqtt_response_publish* published) {
+  const char* content = published->application_message;
+  mqttDebug("receive mqtt message, size:%d", (int)published->application_message_size);
+
+  if (tsMqttConnect == NULL) {
+    tsMqttConnect = taos_connect(NULL, "_root", tsInternalPass, "", 0);
+    if (tsMqttConnect == NULL) {
+      mqttError("failed to connect to tdengine, reason:%s", tstrerror(terrno));
+      return;
     } else {
-      strncpy(_token, p_p_cmd_part[1], 127);
-      strncpy(_dbname, p_p_cmd_part[2], 127);
-      strncpy(_tablename, p_p_cmd_part[3], 127);
-      mqttInfo("part count=%d,access token:%s,database name:%s, table name:%s", part_index, _token, _dbname,
-                _tablename);
+      mqttInfo("successfully connected to the tdengine");
+    }
+  }
 
-      if (mqttConnect != NULL) {
-        char* _sql = converJsonToSql((char*)published->application_message, _dbname, _tablename);
-        mqttInfo("query:%s", _sql);
-        taos_query_a(mqttConnect, _sql, mqttQueryInsertCallback, &mqttClient);
-        mqttInfo("free sql:%s", _sql);
-        free(_sql);
-      }
+  mqttTrace("receive mqtt message, content:%s", content);
+
+  char* sql = mqttConverJsonToSql((char*)content, (int)published->application_message_size);
+  if (sql != NULL) {
+    void* res = taos_query(tsMqttConnect, sql);
+    int   code = taos_errno(res);
+    if (code != 0) {
+      mqttError("failed to exec sql, reason:%s sql:%s", tstrerror(code), sql);
+    } else {
+      mqttTrace("successfully to exec sql:%s", sql);
     }
+    taos_free_result(res);
+  } else {
+    mqttError("failed to parse mqtt message");
   }
-  free(topic_name);
 }
 
 void* mqttClientRefresher(void* client) {
-  while (mttIsRuning) {
+  while (tsMqttIsRuning) {
     mqtt_sync((struct mqtt_client*)client);
     taosMsleep(100);
   }
-  mqttDebug("quit refresher");
+
+  mqttDebug("mqtt quit refresher");
   return NULL;
 }
 
-void mqttCleanup(int status, int sockfd, pthread_t* client_daemon) {
-#if 0 
+void mqttCleanupRes(int status, int sockfd, pthread_t* client_daemon) {
   mqttInfo("clean up mqtt module");
-  if (sockfd != -1) close(sockfd);
-  if (client_daemon != NULL) pthread_cancel(*client_daemon);
-#endif
-}
-
-void mqttInitConnCb(void* param, TAOS_RES* result, int32_t code) {
-  if (code < 0) {
-    mqttError("mqtt:%d, connect to database failed, reason:%s", code, tstrerror(code));
-    taos_close(mqttConnect);
-    mqttConnect = NULL;
-    return;
+  if (sockfd != -1) {
+    close(sockfd);
   }
-  mqttDebug("mqtt:%d, connect to database success, reason:%s", code, tstrerror(code));
-}
 
-void mqttQueryInsertCallback(void* param, TAOS_RES* result, int32_t code) {
-  if (code < 0) {
-    mqttError("mqtt:%d, save data failed, code:%s", code, tstrerror(code));
-  } else if (code == 0) {
-    mqttError("mqtt:%d, save data failed, affect rows:%d", code, code);
-  } else {
-    mqttInfo("mqtt:%d, save data   success, code:%s", code, tstrerror(code));
+  if (client_daemon != NULL) {
+    pthread_cancel(*client_daemon);
   }
 }
 
-void mqttReconnectClient(struct mqtt_client* client, void** reconnect_state_vptr) {
-  mqttInfo("reconnect client");
-  struct reconnect_state_t* reconnect_state = *((struct reconnect_state_t**)reconnect_state_vptr);
+void mqttReconnectClient(struct mqtt_client* client, void** unused) {
+  mqttInfo("mqtt tries to connect to the mqtt server");
 
-  /* Close the clients socket if this isn't the initial reconnect call */
   if (client->error != MQTT_ERROR_INITIAL_RECONNECT) {
     close(client->socketfd);
   }
 
-  /* Perform error handling here. */
   if (client->error != MQTT_ERROR_INITIAL_RECONNECT) {
-    mqttError("mqttReconnectClient: called while client was in error state \"%s\"", mqtt_error_str(client->error));
+    mqttError("mqtt client was in error state %s", mqtt_error_str(client->error));
   }
 
-  /* Open a new socket. */
-  int sockfd = open_nb_socket(reconnect_state->hostname, reconnect_state->port);
-  if (sockfd == -1) {
-    mqttError("failed to open socket: ");
-    mqttCleanup(EXIT_FAILURE, sockfd, NULL);
+  int sockfd = open_nb_socket(tsMqttHostName, tsMqttPort);
+  if (sockfd < 0) {
+    mqttError("mqtt client failed to open socket %s:%s", tsMqttHostName, tsMqttPort);
+    //mqttCleanupRes(EXIT_FAILURE, sockfd, NULL);
+    return;
   }
 
-  /* Reinitialize the client. */
-  mqtt_reinit(client, sockfd, reconnect_state->sendbuf, reconnect_state->sendbufsz, reconnect_state->recvbuf,
-              reconnect_state->recvbufsz);
-
-  /* Ensure we have a clean session */
-  uint8_t connect_flags = MQTT_CONNECT_CLEAN_SESSION;
-  /* Send connection request to the broker. */
-  mqtt_connect(client, reconnect_state->client_id, NULL, NULL, 0, reconnect_state->user_name, reconnect_state->password,connect_flags, 400);
-
-  /* Subscribe to the topic. */
-  mqtt_subscribe(client, reconnect_state->topic, 0);
+  mqtt_reinit(client, sockfd, tsMqttStatus.sendbuf, tsMqttStatus.sendbufsz, tsMqttStatus.recvbuf, tsMqttStatus.recvbufsz);
+  mqtt_connect(client, tsMqttClientId, NULL, NULL, 0, tsMqttUser, tsMqttPass, MQTT_CONNECT_CLEAN_SESSION, 400);
+  mqtt_subscribe(client, tsMqttTopic, 0);
 }
\ No newline at end of file
diff --git a/src/query/CMakeLists.txt b/src/query/CMakeLists.txt
index e2bee4285fd94fc71899247f7d2ed94849f30a93..c1024f008095be76dba0d8dd59447a489c015772 100644
--- a/src/query/CMakeLists.txt
+++ b/src/query/CMakeLists.txt
@@ -8,10 +8,9 @@ INCLUDE_DIRECTORIES(inc)
 AUX_SOURCE_DIRECTORY(src SRC)
 ADD_LIBRARY(query ${SRC})
 SET_SOURCE_FILES_PROPERTIES(src/sql.c PROPERTIES COMPILE_FLAGS -w)
+TARGET_LINK_LIBRARIES(query tsdb tutil)
 
 IF (TD_LINUX)
-  TARGET_LINK_LIBRARIES(query tsdb tutil m rt)
+  TARGET_LINK_LIBRARIES(query m rt)
   ADD_SUBDIRECTORY(tests)
-ELSEIF (TD_WINDOWS)
-   TARGET_LINK_LIBRARIES(query tsdb tutil)
 ENDIF ()
diff --git a/src/tsdb/CMakeLists.txt b/src/tsdb/CMakeLists.txt
index cef1d0bba7ada660ef5f8059c264b2bdfd0056d2..d86b104f234a7e39bd67f728370e188c965cf42a 100644
--- a/src/tsdb/CMakeLists.txt
+++ b/src/tsdb/CMakeLists.txt
@@ -3,13 +3,10 @@ PROJECT(TDengine)
 
 INCLUDE_DIRECTORIES(inc)
 AUX_SOURCE_DIRECTORY(src SRC)
+ADD_LIBRARY(tsdb ${SRC})
+TARGET_LINK_LIBRARIES(tsdb common tutil)
 
 IF (TD_LINUX)
-  ADD_LIBRARY(tsdb ${SRC})
-  TARGET_LINK_LIBRARIES(tsdb common tutil)
   # Someone has no gtest directory, so comment it
   # ADD_SUBDIRECTORY(tests)
-ELSEIF (TD_WINDOWS)
-  ADD_LIBRARY(tsdb ${SRC})
-  TARGET_LINK_LIBRARIES(tsdb common tutil)
 ENDIF ()
diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
index b2778b69d93be9c86bb948223967d755fed9bbbe..e63a085cc8d9e81d68e770df64f6c0d6c43e1807 100644
--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
@@ -3,9 +3,10 @@ PROJECT(TDengine)
 
 AUX_SOURCE_DIRECTORY(src SRC)
 ADD_LIBRARY(tutil ${SRC})
+TARGET_LINK_LIBRARIES(tutil pthread osdetail lz4)
   
 IF (TD_LINUX)
-  TARGET_LINK_LIBRARIES(tutil pthread osdetail m rt lz4)
+  TARGET_LINK_LIBRARIES(tutil m rt)
   ADD_SUBDIRECTORY(tests)
 
   FIND_PATH(ICONV_INCLUDE_EXIST iconv.h /usr/include/ /usr/local/include/)
@@ -24,7 +25,7 @@ IF (TD_LINUX)
   ENDIF ()
 
 ELSEIF (TD_WINDOWS)
-  TARGET_LINK_LIBRARIES(tutil iconv regex pthread osdetail winmm IPHLPAPI ws2_32 lz4 wepoll)
+  TARGET_LINK_LIBRARIES(tutil iconv regex winmm IPHLPAPI ws2_32 wepoll)
 ELSEIF(TD_DARWIN)
-  TARGET_LINK_LIBRARIES(tutil iconv pthread osdetail lz4)
+  TARGET_LINK_LIBRARIES(tutil iconv)
 ENDIF()
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index c294e86839ce372a0bf9c53797dd573da88532ed..5a778156ff4fa88a798d260654edf04860d9692b 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -47,6 +47,15 @@ static void     vnodeNotifyRole(void *ahandle, int8_t role);
 static void     vnodeCtrlFlow(void *handle, int32_t mseconds); 
 static int      vnodeNotifyFileSynced(void *ahandle, uint64_t fversion);
 
+#ifndef _SYNC
+tsync_h syncStart(const SSyncInfo *info) { return NULL; }
+int32_t syncForwardToPeer(tsync_h shandle, void *pHead, void *mhandle, int qtype) { return 0; }
+void    syncStop(tsync_h shandle) {}
+int32_t syncReconfig(tsync_h shandle, const SSyncCfg * cfg) { return 0; }
+int     syncGetNodesRole(tsync_h shandle, SNodesRole * cfg) { return 0; }
+void    syncConfirmForward(tsync_h shandle, uint64_t version, int32_t code) {}
+#endif
+
 int32_t vnodeInitResources() {
   vnodeInitWriteFp();
   vnodeInitReadFp();
@@ -289,12 +298,16 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   syncInfo.notifyFileSynced = vnodeNotifyFileSynced;
   pVnode->sync = syncStart(&syncInfo);
 
+#ifndef _SYNC
+  pVnode->role = TAOS_SYNC_ROLE_MASTER;
+#else
   if (pVnode->sync == NULL) {
     vError("vgId:%d, failed to open sync module, replica:%d reason:%s", pVnode->vgId, pVnode->syncCfg.replica,
            tstrerror(terrno));
     vnodeCleanUp(pVnode);
     return terrno;
   }
+#endif  
 
   pVnode->qMgmt = qOpenQueryMgmt(pVnode->vgId);
   if (pVnode->qMgmt == NULL) {
diff --git a/src/wal/CMakeLists.txt b/src/wal/CMakeLists.txt
index e7d5ae15108175a20aa2deaae797cb6777d1984f..359e09287a9409a7acffe27d934884cce0510bb0 100644
--- a/src/wal/CMakeLists.txt
+++ b/src/wal/CMakeLists.txt
@@ -7,6 +7,5 @@ AUX_SOURCE_DIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/src SRC)
 IF (TD_LINUX)
   ADD_LIBRARY(twal ${SRC})
   TARGET_LINK_LIBRARIES(twal tutil common)
-
   ADD_SUBDIRECTORY(test)
 ENDIF ()  
diff --git a/tests/script/general/connection/mqtt.sim b/tests/script/general/connection/mqtt.sim
new file mode 100644
index 0000000000000000000000000000000000000000..4b291f91ea5089018207b11b2016b234dcc2a883
--- /dev/null
+++ b/tests/script/general/connection/mqtt.sim
@@ -0,0 +1,19 @@
+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c walLevel -v 2
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 1
+system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode1 -c maxTablesPerVnode -v 100000
+system sh/cfg.sh -n dnode1 -c http -v 1
+system sh/cfg.sh -n dnode1 -c mqtt -v 1
+
+system sh/exec.sh -n dnode1 -s start
+
+sleep 3000
+sql connect
+sql create database mqttdb;
+sql create table mqttdb.devices(ts timestamp, value double) tags(name binary(32), model binary(32), serial binary(16), param binary(16), unit binary(16));
+
+sleep 1000
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
diff --git a/tests/script/general/db/delete_reusevnode.sim b/tests/script/general/db/delete_reusevnode.sim
index 79783d6ddab20c53125a01c6ff38a7dbaf455c72..5cfe7729ed6e698169be5efb70ae9ef490c98edb 100644
--- a/tests/script/general/db/delete_reusevnode.sim
+++ b/tests/script/general/db/delete_reusevnode.sim
@@ -50,7 +50,7 @@ $tbPrefix = t
 $i = 0
 while $i < 10
   $db = db . $i
-  sql create database $db maxTables 4
+  sql create database $db
   sql use $db
 
   sql create table st (ts timestamp, i int) tags(j int);
diff --git a/tests/script/general/db/delete_reusevnode2.sim b/tests/script/general/db/delete_reusevnode2.sim
index e54266e312b090021204b8fe0151f5f6269a114f..9fa196942547b5d36f9d01a669868964003cdf3d 100644
--- a/tests/script/general/db/delete_reusevnode2.sim
+++ b/tests/script/general/db/delete_reusevnode2.sim
@@ -8,7 +8,7 @@ sql connect
 
 print ======== step1
 
-sql create database db maxTables 4;
+sql create database db;
 sql use db
 
 $tbPrefix = t
diff --git a/tests/script/general/db/dropdnodes.sim b/tests/script/general/db/dropdnodes.sim
index be160910c57bf493662a725886ce463b1fe59f4b..884a88490e314750d0ddfe8806e544e44e327ff2 100644
--- a/tests/script/general/db/dropdnodes.sim
+++ b/tests/script/general/db/dropdnodes.sim
@@ -15,7 +15,7 @@ sql connect
 sql create dnode $hostname2
 sleep 2000
 
-sql create database db maxTables 4
+sql create database db
 sql use db
 
 print ==========  step1
diff --git a/tests/script/general/parser/first_last.sim b/tests/script/general/parser/first_last.sim
index fa2d7675d2c6b249f939e897098ac04d4cd18ab0..4598a4735cbba568a633046bf945c6d85092614a 100644
--- a/tests/script/general/parser/first_last.sim
+++ b/tests/script/general/parser/first_last.sim
@@ -22,7 +22,7 @@ $stb = $stbPrefix . $i
 sql drop database $db -x step1
 step1:
 
-sql create database $db maxrows 400 cache 1 maxTables 4
+sql create database $db maxrows 400 cache 1
 
 sql use $db
 sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 smallint, c6 tinyint, c7 bool, c8 binary(10), c9 nchar(10)) tags(t1 int)
diff --git a/tests/script/general/parser/groupby.sim b/tests/script/general/parser/groupby.sim
index 70edf3535b0dd185bb8d9a6c46f14e7d05cf7511..1bd56c44f196649cd418327c1c7bb2bf9baf5784 100644
--- a/tests/script/general/parser/groupby.sim
+++ b/tests/script/general/parser/groupby.sim
@@ -28,7 +28,7 @@ $tstart = 100000
 
 sql drop database if exits $db -x step1
 step1:
-sql create database if not exists $db maxTables 4 keep 36500
+sql create database if not exists $db keep 36500
 sql use $db
 sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int, t2 binary(12))
 
diff --git a/tests/script/general/parser/join.sim b/tests/script/general/parser/join.sim
index f17e28c1da6443321945cdb8804d321e133e648f..7b47c4ff3c23d5b4f4dac7a6173ba5212033ff24 100644
--- a/tests/script/general/parser/join.sim
+++ b/tests/script/general/parser/join.sim
@@ -24,7 +24,7 @@ $tstart = 100000
 
 sql drop database if exits $db -x step1
 step1:
-sql create database if not exists $db maxTables 4 keep 36500
+sql create database if not exists $db keep 36500
 sql use $db
 sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int, t2 binary(12))
 
diff --git a/tests/script/general/parser/join_multivnode.sim b/tests/script/general/parser/join_multivnode.sim
index 4cf1d36672a23f7c1ed6edaca436883de992721b..21ed2e1ab17b4a7260eb86c77ab633af9bbecaae 100644
--- a/tests/script/general/parser/join_multivnode.sim
+++ b/tests/script/general/parser/join_multivnode.sim
@@ -22,7 +22,7 @@ $tstart = 100000
 
 sql drop database if exits $db -x step1
 step1:
-sql create database if not exists $db maxTables 4 keep 36500
+sql create database if not exists $db keep 36500
 sql use $db
 sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int, t2 binary(12))
 
diff --git a/tests/script/general/parser/lastrow.sim b/tests/script/general/parser/lastrow.sim
index 48f6e65a4fa8d41ac64aa08e529f8704f19f3b45..3eb3ecb24a321ed3b181aac1a91a20870a1cdd44 100644
--- a/tests/script/general/parser/lastrow.sim
+++ b/tests/script/general/parser/lastrow.sim
@@ -21,7 +21,7 @@ $stb = $stbPrefix . $i
 
 sql drop database $db -x step1
 step1:
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 smallint, c6 tinyint, c7 bool, c8 binary(10), c9 nchar(10)) tags(t1 int)
 
diff --git a/tests/script/general/parser/mixed_blocks.sim b/tests/script/general/parser/mixed_blocks.sim
index 569decaa14d49a6a3e109a2c4a6ec489eecb7706..b229cd9c89c4a30030361693efba52ee7ce8423b 100644
--- a/tests/script/general/parser/mixed_blocks.sim
+++ b/tests/script/general/parser/mixed_blocks.sim
@@ -22,7 +22,7 @@ sql drop database if exists $db
 $paramRows = 200
 $rowNum = $paramRows * 4
 $rowNum = $rowNum / 5
-sql create database $db maxrows $paramRows maxTables 4
+sql create database $db maxrows $paramRows 
 print ====== create tables
 sql use $db
 sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 bool, c6 binary(10), c7 nchar(10)) tags(t1 int)
diff --git a/tests/script/general/parser/projection_limit_offset.sim b/tests/script/general/parser/projection_limit_offset.sim
index 2b89946ef850cfd8e0b105cd35c8afc6a1d3866b..79ab1800d40dcc92fe6e5d2a2a64f8ac787ab7ac 100644
--- a/tests/script/general/parser/projection_limit_offset.sim
+++ b/tests/script/general/parser/projection_limit_offset.sim
@@ -22,7 +22,7 @@ $tstart = 100000
 
 sql drop database if exits $db -x step1
 step1:
-sql create database if not exists $db maxTables 4 keep 36500
+sql create database if not exists $db keep 36500
 sql use $db
 sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int, t2 binary(12))
 
diff --git a/tests/script/general/parser/select_with_tags.sim b/tests/script/general/parser/select_with_tags.sim
index 9f944a586b8addc26a0b7119bba4eca610567360..b46a9029974b34b7e6918203b4cff8dd4902e63c 100644
--- a/tests/script/general/parser/select_with_tags.sim
+++ b/tests/script/general/parser/select_with_tags.sim
@@ -23,7 +23,7 @@ $tstart = 100000
 
 sql drop database if exists $db -x step1
 step1:
-sql create database if not exists $db maxTables 4 keep 36500
+sql create database if not exists $db  keep 36500
 sql use $db
 sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int, t2 binary(12))
 
diff --git a/tests/script/general/parser/single_row_in_tb.sim b/tests/script/general/parser/single_row_in_tb.sim
index 2313a98b41b0075c8acd6441d9cd7efb6273fea0..8f5c6db553d4a66f5b5565c3d2e4fdf1f5c0832d 100644
--- a/tests/script/general/parser/single_row_in_tb.sim
+++ b/tests/script/general/parser/single_row_in_tb.sim
@@ -15,7 +15,7 @@ $db = $dbPrefix
 $stb = $stbPrefix
 
 sql drop database if exists $db
-sql create database $db maxrows 200 maxTables 4
+sql create database $db maxrows 200 
 print ====== create tables
 sql use $db
 sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 bool, c6 binary(10), c7 nchar(10)) tags(t1 int)
diff --git a/tests/script/general/parser/slimit.sim b/tests/script/general/parser/slimit.sim
index 2ce3d0c2ac20359951954be22551eb7fd423b5ea..fedf3f8da8d1774ea60b66920e1e5ba1b91fd0a3 100644
--- a/tests/script/general/parser/slimit.sim
+++ b/tests/script/general/parser/slimit.sim
@@ -21,7 +21,7 @@ $db = $dbPrefix . $i
 $stb = $stbPrefix . $i
 
 sql drop database if exists $db
-sql create database $db maxrows 200 cache 16 maxTables 4
+sql create database $db maxrows 200 cache 16 
 print ====== create tables
 sql use $db
 sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 smallint, c6 tinyint, c7 bool, c8 binary(10), c9 nchar(10)) tags(t1 binary(15), t2 int, t3 bigint, t4 nchar(10), t5 double, t6 bool)
diff --git a/tests/script/general/parser/timestamp.sim b/tests/script/general/parser/timestamp.sim
index 28bbc9df0ef92aa8106819d2c23a75de626bb60b..a47372bf9d8c97ad2294b2f1599710e9e10849ea 100644
--- a/tests/script/general/parser/timestamp.sim
+++ b/tests/script/general/parser/timestamp.sim
@@ -20,7 +20,7 @@ $db = $dbPrefix . $i
 $stb = $stbPrefix . $i
 
 sql drop database if exists $db
-sql create database $db maxrows 200 maxTables 4
+sql create database $db maxrows 200 
 print ====== create tables
 sql use $db
 sql create table $stb (ts timestamp, c1 timestamp, c2 int) tags(t1 binary(20))
diff --git a/tests/script/general/parser/where.sim b/tests/script/general/parser/where.sim
index 710156a4fff6b21ef72d506398621e810bdfb506..dd3b11c2dcbb90a3c82cf7547733d826c97d0f25 100644
--- a/tests/script/general/parser/where.sim
+++ b/tests/script/general/parser/where.sim
@@ -21,7 +21,7 @@ $mt = $mtPrefix . $i
 
 sql drop database if exits $db -x step1
 step1:
-sql create database if not exists $db maxTables 4
+sql create database if not exists $db 
 sql use $db
 sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int)
 
diff --git a/tests/script/general/stable/dnode3.sim b/tests/script/general/stable/dnode3.sim
index 76652229d2ce71765178c0b1359d918b28a44fcd..2859f644bb883483385fdf2421b0996a4416b9e6 100644
--- a/tests/script/general/stable/dnode3.sim
+++ b/tests/script/general/stable/dnode3.sim
@@ -54,7 +54,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index 40598332d998191402cc411e0c6156f302d99267..88a844333beb70a9737a9464b4a97efeae3b130c 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -293,6 +293,7 @@ cd ../../../debug; make
 ./test.sh -f unique/stable/replica3_dnode6.sim
 ./test.sh -f unique/stable/replica3_vnode3.sim
 
+./test.sh -f unique/mnode/mgmt20.sim
 ./test.sh -f unique/mnode/mgmt21.sim
 ./test.sh -f unique/mnode/mgmt22.sim
 ./test.sh -f unique/mnode/mgmt23.sim
diff --git a/tests/script/sh/deploy.sh b/tests/script/sh/deploy.sh
index 498f5367261c395be3ef1c508a8dc14700a7f8d1..0d444a5a6ed25329b857422cd8eb8bd06af87530 100755
--- a/tests/script/sh/deploy.sh
+++ b/tests/script/sh/deploy.sh
@@ -119,7 +119,7 @@ echo "tsdbDebugFlag          135"                >> $TAOS_CFG
 echo "cDebugFlag             135"                >> $TAOS_CFG
 echo "jnidebugFlag           135"                >> $TAOS_CFG
 echo "odbcdebugFlag          135"                >> $TAOS_CFG
-echo "httpDebugFlag          143"                >> $TAOS_CFG
+echo "httpDebugFlag          135"                >> $TAOS_CFG
 echo "monitorDebugFlag       135"                >> $TAOS_CFG
 echo "mqttDebugFlag          135"                >> $TAOS_CFG
 echo "qdebugFlag             135"                >> $TAOS_CFG
diff --git a/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim b/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
index b18edf067019d8d4142117a6e8347b3ffcb8b95a..4f80c2389ee25d06a9852d38af9df3d40d838c90 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_change.sim
@@ -61,7 +61,7 @@ $totalTableNum = 10
 $sleepTimer = 3000
 
 $db = db
-sql create database $db replica 2 maxTables $totalTableNum
+sql create database $db replica 2 
 sql use $db
 
 # create table , insert data
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 4f737b9c40dd51aad4568e3fc91f1407836f6c68..fb0650b78a6875a812fdbb1cbac4a97e48e88348 100644
--- a/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
+++ b/tests/script/unique/arbitrator/dn3_mn1_vnode_corruptFile_online.sim
@@ -61,7 +61,7 @@ $totalTableNum = 4
 $sleepTimer = 3000
 
 $db = db
-sql create database $db cache 1 replica 2 maxTables $totalTableNum
+sql create database $db cache 1 replica 2 
 sql use $db
 
 # create table , insert data
diff --git a/tests/script/unique/arbitrator/sync_replica3_createTable.sim b/tests/script/unique/arbitrator/sync_replica3_createTable.sim
index 3bf274a3eadf08815b2f9b5981d8231881dd144c..d593577bee4bf2ec6997836905a99c327ba6f443 100644
--- a/tests/script/unique/arbitrator/sync_replica3_createTable.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_createTable.sim
@@ -61,8 +61,8 @@ $totalTableNum = 20
 $sleepTimer = 3000
 
 $db = db
-print create database $db replica 3 maxTables $totalTableNum
-sql create database $db replica 3 maxTables $totalTableNum
+print create database $db replica 3 
+sql create database $db replica 3
 sql use $db
 
 # create table , insert data
diff --git a/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim b/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
index c8fe96008b243086643e88eb9eeb250b851b18df..1ef499534fe272a32556a4155a4e622a77ad1ecf 100644
--- a/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
+++ b/tests/script/unique/arbitrator/sync_replica3_dnodeChang_DropAddAlterTableDropDb.sim
@@ -62,8 +62,8 @@ $sleepTimer = 3000
 
 $maxTables = $totalTableNum * 2 
 $db = db
-print create database $db replica 3 maxTables $maxTables
-sql create database $db replica 3 maxTables $maxTables
+print create database $db replica 3 
+sql create database $db replica 3 
 sql use $db
 
 # create table , insert data
diff --git a/tests/script/unique/big/maxvnodes.sim b/tests/script/unique/big/maxvnodes.sim
index eb6e0b3b53c4bfee7b8f11c0f431812fc27c93e8..662d391e475f0b8afccbb37af5bae18fabe76621 100644
--- a/tests/script/unique/big/maxvnodes.sim
+++ b/tests/script/unique/big/maxvnodes.sim
@@ -18,7 +18,7 @@ print ==========  prepare data
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect 
-sql create database db blocks 3 cache 1 maxTables $maxTables
+sql create database db blocks 3 cache 1 
 sql use db
 
 print ==========  step1
diff --git a/tests/script/unique/big/restartSpeed.sim b/tests/script/unique/big/restartSpeed.sim
index 9d490fcb8b15b8eb2b4af1fd48fcd6fa908a2ce6..ea4edefda8f96c94aab12d856914565f8e8115f4 100644
--- a/tests/script/unique/big/restartSpeed.sim
+++ b/tests/script/unique/big/restartSpeed.sim
@@ -16,7 +16,7 @@ print ==========  prepare data
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect 
-sql create database db blocks 3 cache 1 maxTables $maxTables
+sql create database db blocks 3 cache 1 
 sql use db
 
 print ==========  step1
diff --git a/tests/script/unique/cluster/balance1.sim b/tests/script/unique/cluster/balance1.sim
index 44f44e397645020bc75561267698d5cf66a84d21..728ead25fe59e2521444c3fea128cb9a9c15556f 100644
--- a/tests/script/unique/cluster/balance1.sim
+++ b/tests/script/unique/cluster/balance1.sim
@@ -40,7 +40,7 @@ print ========= start dnode1
 system sh/exec.sh -n dnode1 -s start
 sql connect
 
-sql create database c_b1_d1 maxTables 4
+sql create database c_b1_d1 
 sql use c_b1_d1
 
 sql create table c_b1_t1 (t timestamp, i int)
@@ -50,7 +50,7 @@ sql insert into c_b1_t1 values(1520000022013, 13)
 sql insert into c_b1_t1 values(1520000023012, 12)
 sql insert into c_b1_t1 values(1520000024011, 11)
 
-sql create database c_b1_d2 maxTables 4
+sql create database c_b1_d2 
 sql use c_b1_d2
 sql create table c_b1_t2 (t timestamp, i int)
 sql insert into c_b1_t2 values(1520000020025, 25)
@@ -107,7 +107,7 @@ print dnode2 ==> $dnode2Role
 
 print ============================== step3
 print ========= add db3
-sql create database c_b1_d3 maxTables 4
+sql create database c_b1_d3 
 sql use c_b1_d3
 sql create table c_b1_t3 (t timestamp, i int)
 sql insert into c_b1_t3 values(1520000020035, 35)
@@ -280,7 +280,7 @@ if $dnode4Role != slave then
 endi
 
 print ============================== step10
-sql create database c_b1_d4 maxTables 4
+sql create database c_b1_d4 
 sql use c_b1_d4
 sql create table c_b1_t4 (t timestamp, i int)
 sql insert into c_b1_t4 values(1520000020045, 45)
@@ -318,7 +318,7 @@ sql use c_b1_d2
 sql insert into c_b1_t2 values(1520000025026, 26)
 
 print ============================== step12
-sql create database c_b1_d5 maxTables 4
+sql create database c_b1_d5 
 sql use c_b1_d5
 sql_error create table c_b1_t5 (t timestamp, i int) -x error3
 
@@ -343,7 +343,7 @@ sql insert into c_b1_t5 values(1520000022053, 53)
 sql insert into c_b1_t5 values(1520000023052, 52)
 sql insert into c_b1_t5 values(1520000024051, 51)
 
-sql create database c_b1_d6 maxTables 4
+sql create database c_b1_d6 
 sql use c_b1_d6
 sql create table c_b1_t6 (t timestamp, i int)
 sql insert into c_b1_t6 values(1520000020065, 65)
@@ -375,7 +375,7 @@ sql create dnode $hostname6
 system sh/exec.sh -n dnode6 -s start
 sleep 15000
 
-sql create database c_b1_d7 maxTables 4
+sql create database c_b1_d7 
 sql use c_b1_d7
 sql create table c_b1_t7 (t timestamp, i int)
 sql insert into c_b1_t7 values(1520000020075, 75)
@@ -384,7 +384,7 @@ sql insert into c_b1_t7 values(1520000022073, 73)
 sql insert into c_b1_t7 values(1520000023072, 72)
 sql insert into c_b1_t7 values(1520000024071, 71)
 
-sql create database c_b1_d8 maxTables 4
+sql create database c_b1_d8 
 sql use c_b1_d8
 sql create table c_b1_t8 (t timestamp, i int)
 sql insert into c_b1_t8 values(1520000020085, 85)
diff --git a/tests/script/unique/cluster/balance2.sim b/tests/script/unique/cluster/balance2.sim
index 0c880d36ff2734423fe536ad147f59551852191d..6d2c4bdad76c3b117035264be6b2a1878aeed536 100644
--- a/tests/script/unique/cluster/balance2.sim
+++ b/tests/script/unique/cluster/balance2.sim
@@ -47,7 +47,7 @@ system sh/exec.sh -n dnode2 -s start
 system sh/exec.sh -n dnode3 -s start
 sleep 4001
 
-sql create database c_b2_d1 replica 2 maxTables 4
+sql create database c_b2_d1 replica 2 
 sql use c_b2_d1
 sql create table c_b2_t1 (t timestamp, i int)
 sql insert into c_b2_t1 values(1520000020015, 15)
@@ -56,7 +56,7 @@ sql insert into c_b2_t1 values(1520000022013, 13)
 sql insert into c_b2_t1 values(1520000023012, 12)
 sql insert into c_b2_t1 values(1520000024011, 11)
 
-sql create database c_b2_d2 replica 2 maxTables 4
+sql create database c_b2_d2 replica 2 
 sql use c_b2_d2
 sql create table c_b2_t2 (t timestamp, i int)
 sql insert into c_b2_t2 values(1520000020025, 25)
@@ -65,7 +65,7 @@ sql insert into c_b2_t2 values(1520000022023, 23)
 sql insert into c_b2_t2 values(1520000023022, 22)
 sql insert into c_b2_t2 values(1520000024021, 21)
 
-sql create database c_b2_d3 replica 2 maxTables 4
+sql create database c_b2_d3 replica 2 
 sql use c_b2_d3
 sql create table c_b2_t3 (t timestamp, i int)
 sql insert into c_b2_t3 values(1520000020035, 35)
diff --git a/tests/script/unique/cluster/cluster_main.sim b/tests/script/unique/cluster/cluster_main.sim
index 7d4a35c7f2d18a6300fb66e1bb9dd2364d748c58..f0a9b1a2147288fb3f0d2437a507296f9517ce09 100644
--- a/tests/script/unique/cluster/cluster_main.sim
+++ b/tests/script/unique/cluster/cluster_main.sim
@@ -57,7 +57,7 @@ sleep 3000
 print ============== step2: create db1 with replica 3
 $db = db1
 print create database $db replica 3
-#sql create database $db replica 3 maxTables $totalTableNum
+#sql create database $db replica 3 
 sql create database $db replica 3
 sql use $db
 
diff --git a/tests/script/unique/cluster/cluster_main0.sim b/tests/script/unique/cluster/cluster_main0.sim
index ef76f8823f6686a9e47d0d367f4092c1c007e9d5..9f775c0cef183bfe3b8dd231a08f5f829fe2d3ef 100644
--- a/tests/script/unique/cluster/cluster_main0.sim
+++ b/tests/script/unique/cluster/cluster_main0.sim
@@ -57,7 +57,7 @@ sleep 3000
 print ============== step2: create db1 with replica 3
 $db = db1
 print create database $db replica 3
-#sql create database $db replica 3 maxTables $totalTableNum
+#sql create database $db replica 3 
 sql create database $db replica 3
 sql use $db
 
diff --git a/tests/script/unique/cluster/cluster_main1.sim b/tests/script/unique/cluster/cluster_main1.sim
index 4537b09091eed722ae3f78e894f4c62c8afeea0e..7796f1ea00da9d9915aba6a9cbecee0223f99fd4 100644
--- a/tests/script/unique/cluster/cluster_main1.sim
+++ b/tests/script/unique/cluster/cluster_main1.sim
@@ -58,7 +58,7 @@ print ============== step2: create db1 with replica 3
 $replica = 3
 $db = db1
 print create database $db replica $replica
-#sql create database $db replica 3 maxTables $totalTableNum
+#sql create database $db replica 3 
 sql create database $db replica $replica
 sql use $db
 
diff --git a/tests/script/unique/cluster/cluster_main2.sim b/tests/script/unique/cluster/cluster_main2.sim
index 84ea3871efb783fc7a3b41b9d684816766d6e44a..48661546815a1e4c60e2b8d983f0a3e20e232529 100644
--- a/tests/script/unique/cluster/cluster_main2.sim
+++ b/tests/script/unique/cluster/cluster_main2.sim
@@ -58,7 +58,7 @@ print ============== step2: create db1 with replica 3
 $replica = 3
 $db = db1
 print create database $db replica $replica
-#sql create database $db replica 3 maxTables $totalTableNum
+#sql create database $db replica 3 
 sql create database $db replica $replica
 sql use $db
 
diff --git a/tests/script/unique/dnode/alternativeRole.sim b/tests/script/unique/dnode/alternativeRole.sim
index fb9d344d20874c62a7de5b7ba5e47012fe5e3584..ab37c1603a82c120d797cbc1e0fbe53f228e6b1a 100644
--- a/tests/script/unique/dnode/alternativeRole.sim
+++ b/tests/script/unique/dnode/alternativeRole.sim
@@ -56,7 +56,7 @@ if $data2_3 != slave then
 endi
 
 print ========== step2
-sql create database d1 maxTables 4
+sql create database d1 
 sql create table d1.t1 (ts timestamp, i int)
 sql create table d1.t2 (ts timestamp, i int)
 sql create table d1.t3 (ts timestamp, i int)
diff --git a/tests/script/unique/dnode/balance1.sim b/tests/script/unique/dnode/balance1.sim
index 5b1615dc289f6910a35a01eb74d9e5bf2c081cf3..b2461977424221d57eea4b8cc2f042f45544aed7 100644
--- a/tests/script/unique/dnode/balance1.sim
+++ b/tests/script/unique/dnode/balance1.sim
@@ -30,7 +30,7 @@ system sh/exec.sh -n dnode1 -s start
 sql connect
 sleep 3000
 
-sql create database d1 maxTables 4
+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)
@@ -68,7 +68,7 @@ if $data2_2 != 1 then
 endi
 
 print ========== step3
-sql create database d2 maxTables 4
+sql create database d2 
 sql create table d2.t2 (t timestamp, i int) 
 sql insert into d2.t2 values(now+1s, 25)
 sql insert into d2.t2 values(now+2s, 24)
@@ -139,7 +139,7 @@ if $data2_3 != 2 then
 endi
 
 print ========== step6
-sql create database d3 maxTables 4
+sql create database d3 
 sql create table d3.t3 (t timestamp, i int)
 sql insert into d3.t3 values(now+1s, 35)
 sql insert into d3.t3 values(now+2s, 34)
@@ -193,7 +193,7 @@ if $data2_4 != 1 then
 endi
 
 print ========== step8
-sql create database d4 maxTables 4
+sql create database d4 
 sql create table d4.t4 (t timestamp, i int)
 sql insert into d4.t4 values(now+1s, 45)
 sql insert into d4.t4 values(now+2s, 44)
diff --git a/tests/script/unique/dnode/balance2.sim b/tests/script/unique/dnode/balance2.sim
index e23562d8b47c122ccba442d0c053a6887f550060..1a80e890a05f1f45ebec9f2e61035f47c117acb3 100644
--- a/tests/script/unique/dnode/balance2.sim
+++ b/tests/script/unique/dnode/balance2.sim
@@ -28,7 +28,7 @@ system sh/exec.sh -n dnode2 -s start
 system sh/exec.sh -n dnode3 -s start
 sleep 3000
 
-sql create database d1 replica 2  maxTables 4
+sql create database d1 replica 2  
 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)
@@ -36,7 +36,7 @@ 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)
 
-sql create database d2 replica 2  maxTables 4
+sql create database d2 replica 2  
 sql create table d2.t2 (t timestamp, i int) 
 sql insert into d2.t2 values(now+1s, 25)
 sql insert into d2.t2 values(now+2s, 24)
@@ -117,7 +117,7 @@ if $data2_4 != 2 then
 endi
 
 print ========== step4
-sql create database d3 replica 2 maxTables 4
+sql create database d3 replica 2 
 sql create table d3.t3 (t timestamp, i int)
 sql insert into d3.t3 values(now+1s, 35)
 sql insert into d3.t3 values(now+2s, 34)
diff --git a/tests/script/unique/dnode/balance3.sim b/tests/script/unique/dnode/balance3.sim
index b2adb24dfa6c85ec09e37c6c415160963f8e1378..1f81fde9686a9c7cb2fabebd835bad09b60ab035 100644
--- a/tests/script/unique/dnode/balance3.sim
+++ b/tests/script/unique/dnode/balance3.sim
@@ -33,7 +33,7 @@ system sh/exec.sh -n dnode3 -s start
 system sh/exec.sh -n dnode4 -s start
 sleep 3000
 
-sql create database d1 replica 3  maxTables 4
+sql create database d1 replica 3  
 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)
@@ -41,7 +41,7 @@ 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)
 
-sql create database d2 replica 3  maxTables 4
+sql create database d2 replica 3  
 sql create table d2.t2 (t timestamp, i int) 
 sql insert into d2.t2 values(now+1s, 25)
 sql insert into d2.t2 values(now+2s, 24)
@@ -136,7 +136,7 @@ if $data2_5 != 2 then
 endi
 
 print ========== step4
-sql create database d3 replica 3 maxTables 4
+sql create database d3 replica 3 
 sql create table d3.t3 (t timestamp, i int) 
 sql insert into d3.t3 values(now+1s, 35)
 sql insert into d3.t3 values(now+2s, 34)
diff --git a/tests/script/unique/dnode/balancex.sim b/tests/script/unique/dnode/balancex.sim
index 0d5da5bbf647c8ebf798745b77e3c15650254718..6f3b7dfb74dbeec1bf9434460551fdb29ebc21e5 100644
--- a/tests/script/unique/dnode/balancex.sim
+++ b/tests/script/unique/dnode/balancex.sim
@@ -20,7 +20,7 @@ system sh/exec.sh -n dnode1 -s start
 sql connect
 sleep 3000
 
-sql create database d1 maxTables 4
+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)
@@ -28,7 +28,7 @@ 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)
 
-sql create database d2 maxTables 4
+sql create database d2 
 sql create table d2.t2 (t timestamp, i int)
 sql insert into d2.t2 values(now+1s, 25)
 sql insert into d2.t2 values(now+2s, 24)
@@ -65,7 +65,7 @@ if $data2_2 != 2 then
 endi
 
 print ========== step3
-sql create database d3 replica 2 maxTables 4
+sql create database d3 replica 2 
 sql create table d3.t3 (t timestamp, i int)
 sql insert into d3.t3 values(now+1s, 35)
 sql insert into d3.t3 values(now+2s, 34)
diff --git a/tests/script/unique/dnode/offline2.sim b/tests/script/unique/dnode/offline2.sim
index 6db6ca40137a75916ff1efe80396c64d03e6838c..2d1467ad5964466896c1ade8b51a8e5d6b80bc7b 100644
--- a/tests/script/unique/dnode/offline2.sim
+++ b/tests/script/unique/dnode/offline2.sim
@@ -27,7 +27,7 @@ sql create dnode $hostname2
 system sh/exec.sh -n dnode2 -s start
 sleep 3000
 
-sql create database d1 replica 2 maxTables 4
+sql create database d1 replica 2 
 sql create table d1.t1(ts timestamp, i int)
 sql insert into d1.t1 values(1588262400001, 1)
 
diff --git a/tests/script/unique/dnode/remove1.sim b/tests/script/unique/dnode/remove1.sim
index 246808c56cba9527a061e3252b397290bfee88f2..7786b9f9d11abbd8d42e5e0990ef124db41e8bae 100644
--- a/tests/script/unique/dnode/remove1.sim
+++ b/tests/script/unique/dnode/remove1.sim
@@ -20,7 +20,7 @@ system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
 
-sql create database d1 maxTables 4
+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)
@@ -28,7 +28,7 @@ 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)
 
-sql create database d2 maxTables 4
+sql create database d2 
 sql create table d2.t2 (t timestamp, i int)
 sql insert into d2.t2 values(now+1s, 25)
 sql insert into d2.t2 values(now+2s, 24)
@@ -47,7 +47,7 @@ sql create dnode $hostname2
 system sh/exec.sh -n dnode2 -s start
 sleep 9000
 
-sql create database d3 replica 2 maxTables 4
+sql create database d3 replica 2 
 sql create table d3.t3 (t timestamp, i int)
 sql insert into d3.t3 values(now+1s, 35)
 sql insert into d3.t3 values(now+2s, 34)
diff --git a/tests/script/unique/dnode/remove2.sim b/tests/script/unique/dnode/remove2.sim
index cf9954c7672099ad97253ca326e05f5bca4d54a5..cd0331235a1c89b55f7560b44a6afb5d0fd4f0eb 100644
--- a/tests/script/unique/dnode/remove2.sim
+++ b/tests/script/unique/dnode/remove2.sim
@@ -20,7 +20,7 @@ system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
 
-sql create database d1 maxTables 4
+sql create database d1 
 sql create table d1.t1 (t timestamp, i int)
 sql insert into d1.t1 values(1588262400001, 15)
 sql insert into d1.t1 values(1588262400002, 14)
@@ -28,7 +28,7 @@ sql insert into d1.t1 values(1588262400003, 13)
 sql insert into d1.t1 values(1588262400004, 12)
 sql insert into d1.t1 values(1588262400005, 11)
 
-sql create database d2 maxTables 4
+sql create database d2 
 sql create table d2.t2 (t timestamp, i int) 
 sql insert into d2.t2 values(1588262400001, 25)
 sql insert into d2.t2 values(1588262400002, 24)
@@ -47,7 +47,7 @@ sql create dnode $hostname2
 system sh/exec.sh -n dnode2 -s start
 sleep 9000
 
-sql create database d3 replica 2 maxTables 4
+sql create database d3 replica 2 
 sql create table d3.t3 (t timestamp, i int)
 sql insert into d3.t3 values(1588262400001, 35)
 sql insert into d3.t3 values(1588262400002, 34)
diff --git a/tests/script/unique/dnode/vnode_clean.sim b/tests/script/unique/dnode/vnode_clean.sim
index e1ee1da2aa7c7291dccc3e674a6eae50165fa358..6df4bf78e81be781780a98bb222767cf5acfbdb5 100644
--- a/tests/script/unique/dnode/vnode_clean.sim
+++ b/tests/script/unique/dnode/vnode_clean.sim
@@ -19,7 +19,7 @@ print ========== step1
 system sh/exec.sh -n dnode1 -s start
 sql connect
 
-sql create database d1 maxTables 4
+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)
@@ -55,7 +55,7 @@ if $data2_2 != 1 then
 endi
 
 print ========== step3
-sql create database d2 maxTables 4
+sql create database d2 
 
 sql create table d2.t2 (t timestamp, i int) 
 sql insert into d2.t2 values(now+1s, 25)
@@ -123,7 +123,7 @@ if $data2_3 != 2 then
 endi
 
 print ========== step6
-sql create database d3 maxTables 4
+sql create database d3 
 sql create table d3.t3 (t timestamp, i int)
 sql insert into d3.t3 values(now+1s, 35)
 sql insert into d3.t3 values(now+2s, 34)
diff --git a/tests/script/unique/mnode/mgmt20.sim b/tests/script/unique/mnode/mgmt20.sim
new file mode 100644
index 0000000000000000000000000000000000000000..e51d4299255248f3fb19371183536e5e62123655
--- /dev/null
+++ b/tests/script/unique/mnode/mgmt20.sim
@@ -0,0 +1,71 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+
+system sh/cfg.sh -n dnode1 -c numOfMnodes -v 2
+system sh/cfg.sh -n dnode2 -c numOfMnodes -v 2
+
+system sh/cfg.sh -n dnode1 -c monitor -v 1
+system sh/cfg.sh -n dnode2 -c monitor -v 1
+
+print ============== step1
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+sleep 3000
+sql connect
+
+print ============== step2
+sql create dnode $hostname2
+
+$x = 0
+show2: 
+	$x = $x + 1
+	sleep 2000
+	if $x == 10 then 
+		return -1
+	endi
+	
+sql show mnodes
+print dnode1 ==> $data2_1
+print dnode2 ==> $data2_2
+if $data2_1 != master then
+	goto show2
+endi
+if $data2_2 != slave then
+	goto show2
+endi
+
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
+
+print ============== step3
+system sh/exec.sh -n dnode2 -s start
+sleep 10000
+
+system sh/exec.sh -n dnode1 -s start
+sql connect
+
+print =============== step4
+sql select * from log.dn1
+$d1_first  = $rows
+sql select * from log.dn2
+$d2_first  = $rows
+
+sleep 3000
+sql select * from log.dn1
+$d1_second  = $rows
+sql select * from log.dn2
+$d2_second  = $rows
+
+print dnode1 $d1_first $d1_second
+print dnode2 $d2_first $d2_second
+if $d1_first >= $d1_second then
+  return -1
+endi
+
+if $d2_first >= $d2_second then
+  return -1
+endi
+
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
\ No newline at end of file
diff --git a/tests/script/unique/stable/balance_replica1.sim b/tests/script/unique/stable/balance_replica1.sim
index 362f8ccf7f297d3d9d48f8d6dd8a8602713f601e..3ea158eb39c0d560900b34d5465fc1ef12a4b42f 100644
--- a/tests/script/unique/stable/balance_replica1.sim
+++ b/tests/script/unique/stable/balance_replica1.sim
@@ -29,7 +29,7 @@ $db = $dbPrefix
 $mt = $mtPrefix
 $st = $stPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int, tbcol2 float) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/dnode2.sim b/tests/script/unique/stable/dnode2.sim
index 441323ff3cb79fe8dc44791755e6e9e76e7fa1ef..5c227f8cece29d31232ba1e030dbd30b3698096d 100644
--- a/tests/script/unique/stable/dnode2.sim
+++ b/tests/script/unique/stable/dnode2.sim
@@ -38,7 +38,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/dnode2_stop.sim b/tests/script/unique/stable/dnode2_stop.sim
index d25c68cbbaf1dc81ce921996c22dd1ef6dcb630b..19c6de33b3882633acce74ca6c8f9bdbccbf7b1c 100644
--- a/tests/script/unique/stable/dnode2_stop.sim
+++ b/tests/script/unique/stable/dnode2_stop.sim
@@ -43,7 +43,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/dnode3.sim b/tests/script/unique/stable/dnode3.sim
index 712ec04b8c5d23172f171f458b7403deb3eba94d..5fe37faa7146c70ce219788a2b2d56a1a88a8dcf 100644
--- a/tests/script/unique/stable/dnode3.sim
+++ b/tests/script/unique/stable/dnode3.sim
@@ -47,7 +47,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/replica2_dnode4.sim b/tests/script/unique/stable/replica2_dnode4.sim
index c7a9767fcc5a543b2b0a81332d111a80871ada95..4f8211d5d4b7ec5cbee3bee8104d0842346978d6 100644
--- a/tests/script/unique/stable/replica2_dnode4.sim
+++ b/tests/script/unique/stable/replica2_dnode4.sim
@@ -54,7 +54,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db replica 2 maxTables 4
+sql create database $db replica 2 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/replica2_vnode3.sim b/tests/script/unique/stable/replica2_vnode3.sim
index 84af380106690d0aa44e491fdd0f2ce4dd58951d..47d45c3d3d7d7a4e32cf94fd8cf4d7dcb0b53477 100644
--- a/tests/script/unique/stable/replica2_vnode3.sim
+++ b/tests/script/unique/stable/replica2_vnode3.sim
@@ -37,7 +37,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db replica 2 maxTables 4
+sql create database $db replica 2 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/replica3_dnode6.sim b/tests/script/unique/stable/replica3_dnode6.sim
index 83ef334301712347bda31873cfd90042287a1207..eeffb86cdbeefaeaf351ec5be3743e53136692ec 100644
--- a/tests/script/unique/stable/replica3_dnode6.sim
+++ b/tests/script/unique/stable/replica3_dnode6.sim
@@ -78,7 +78,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db replica 3 maxTables 4
+sql create database $db replica 3 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stable/replica3_vnode3.sim b/tests/script/unique/stable/replica3_vnode3.sim
index 3cd7b92477aa2c2ded4f2aa0ad4feb210bba954f..bc700b7dda1cf95c96f16907fa207cd0c47819d1 100644
--- a/tests/script/unique/stable/replica3_vnode3.sim
+++ b/tests/script/unique/stable/replica3_vnode3.sim
@@ -54,7 +54,7 @@ $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 
-sql create database $db replica 3 maxTables 4
+sql create database $db replica 3 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stream/metrics_balance.sim b/tests/script/unique/stream/metrics_balance.sim
index c04304449949f49abce52d05ca8c16912115c56d..36086fe4b85b0a6cbf9710af6104d697c1bb59dc 100644
--- a/tests/script/unique/stream/metrics_balance.sim
+++ b/tests/script/unique/stream/metrics_balance.sim
@@ -32,7 +32,7 @@ sql connect
 
 print ============== step1
 $db = $dbPrefix
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 
 $i = 0
diff --git a/tests/script/unique/stream/table_balance.sim b/tests/script/unique/stream/table_balance.sim
index 6c8958aa48b1efdc3e3fc0a2b127faae0e72570c..facb7df45900eff83c18e2a5ee8344d4d426cf9b 100644
--- a/tests/script/unique/stream/table_balance.sim
+++ b/tests/script/unique/stream/table_balance.sim
@@ -34,7 +34,7 @@ $db = $dbPrefix
 $mt = $mtPrefix
 $st = $stPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int, tbcol2 float) TAGS(tgcol int)
 
diff --git a/tests/script/unique/stream/table_move.sim b/tests/script/unique/stream/table_move.sim
index d3ea375e1fa466e9eca515a8235e36db09c80c51..d2437e49205448fdf656fac89391dbb5fe849b9f 100644
--- a/tests/script/unique/stream/table_move.sim
+++ b/tests/script/unique/stream/table_move.sim
@@ -65,7 +65,7 @@ $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
 $st = $stPrefix . $i
 
-sql create database $db maxTables 4
+sql create database $db 
 sql use $db
 sql create table $mt (ts timestamp, tbcol int, tbcol2 float) TAGS(tgcol int)