diff --git a/.travis.yml b/.travis.yml
index da0c47ea56292ab3a9aa5a6fadde133e0aa26984..9bc576dcf9de328032037162f0c882e7ccbf4057 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,7 +50,7 @@ matrix:
           ./test-all.sh $TRAVIS_EVENT_TYPE || travis_terminate $?
 
           cd ${TRAVIS_BUILD_DIR}/tests/pytest
-          ./valgrind-test.sh -g 2>&1 > mem-error-out.txt
+          ./valgrind-test.sh 2>&1 > mem-error-out.txt
           sleep 1
 
           # Color setting
diff --git a/src/client/inc/tscUtil.h b/src/client/inc/tscUtil.h
index dbbec01329c3b6d6c2089e19225003b61512f0fb..715d76e072cae10cc266ec9182b9fda806962e83 100644
--- a/src/client/inc/tscUtil.h
+++ b/src/client/inc/tscUtil.h
@@ -264,6 +264,7 @@ bool hasMoreVnodesToTry(SSqlObj *pSql);
 void tscTryQueryNextVnode(SSqlObj *pSql, __async_cb_func_t fp);
 void tscAsyncQuerySingleRowForNextVnode(void *param, TAOS_RES *tres, int numOfRows);
 void tscTryQueryNextClause(SSqlObj* pSql, void (*queryFp)());
+int  tscSetMgmtIpListFromCfg(const char *first, const char *second);
 
 void* malloc_throw(size_t size);
 void* calloc_throw(size_t nmemb, size_t size);
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 28c5ae9ca0fbba597be7890abb777a3d3734d144..7324363c9d0a9004999883f13b3c8136b6b0ad8e 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -27,6 +27,7 @@
 #include "ttimer.h"
 #include "tutil.h"
 #include "tscLog.h"
+#include "qsqltype.h"
 
 #define TSC_MGMT_VNODE 999
 
@@ -67,7 +68,7 @@ void tscPrintMgmtIp() {
   }
 }
 
-void tscSetMgmtIpListFromCluster(SRpcIpSet *pIpList) {
+void tscSetMgmtIpList(SRpcIpSet *pIpList) {
   tscMgmtIpSet.numOfIps = pIpList->numOfIps;
   tscMgmtIpSet.inUse = pIpList->inUse;
   for (int32_t i = 0; i < tscMgmtIpSet.numOfIps; ++i) {
@@ -75,16 +76,6 @@ void tscSetMgmtIpListFromCluster(SRpcIpSet *pIpList) {
   }
 }
 
-void tscSetMgmtIpListFromEdge() {
-  if (tscMgmtIpSet.numOfIps != 1) {
-    tscMgmtIpSet.numOfIps = 1;
-    tscMgmtIpSet.inUse = 0;
-    taosGetFqdnPortFromEp(tsFirst, tscMgmtIpSet.fqdn[0], &tscMgmtIpSet.port[0]);
-    tscTrace("edge mgmt IP list:");
-    tscPrintMgmtIp();
-  }
-}
-
 void tscUpdateIpSet(void *ahandle, SRpcIpSet *pIpSet) {
   tscMgmtIpSet = *pIpSet;
   tscTrace("mgmt IP list is changed for ufp is called, numOfIps:%d inUse:%d", tscMgmtIpSet.numOfIps, tscMgmtIpSet.inUse);
@@ -93,18 +84,6 @@ void tscUpdateIpSet(void *ahandle, SRpcIpSet *pIpSet) {
   }
 }
 
-void tscSetMgmtIpList(SRpcIpSet *pIpList) {
-  /*
-    * The iplist returned by the cluster edition is the current management nodes
-    * and the iplist returned by the edge edition is empty
-    */
-  if (pIpList->numOfIps != 0) {
-    tscSetMgmtIpListFromCluster(pIpList);
-  } else {
-    tscSetMgmtIpListFromEdge();
-  }
-}
-
 /*
  * For each management node, try twice at least in case of poor network situation.
  * If the client start to connect to a non-management node from the client, and the first retry may fail due to
@@ -132,7 +111,8 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
   if (code == 0) {
     SCMHeartBeatRsp *pRsp = (SCMHeartBeatRsp *)pRes->pRsp;
     SRpcIpSet *      pIpList = &pRsp->ipList;
-    tscSetMgmtIpList(pIpList);
+    if (pIpList->numOfIps > 0) 
+      tscSetMgmtIpList(pIpList);
 
     if (pRsp->killConnection) {
       tscKillConnection(pObj);
@@ -207,7 +187,7 @@ int tscSendMsgToServer(SSqlObj *pSql) {
     memcpy(pMsg, pSql->cmd.payload, pSql->cmd.payloadLen);
   }
 
-  tscTrace("%p msg:%s is sent to server", pSql, taosMsg[pSql->cmd.msgType]);
+  // tscTrace("%p msg:%s is sent to server", pSql, taosMsg[pSql->cmd.msgType]);
 
   SRpcMsg rpcMsg = {
       .msgType = pSql->cmd.msgType,
@@ -235,7 +215,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet) {
   SSqlRes *pRes = &pSql->res;
   SSqlCmd *pCmd = &pSql->cmd;
   STscObj *pObj = pSql->pTscObj;
-  tscTrace("%p msg:%p is received from server", pSql, rpcMsg->pCont);
+  // tscTrace("%p msg:%s is received from server", pSql, taosMsg[rpcMsg->msgType]);
 
   if (pSql->freed || pObj->signature != pObj) {
     tscTrace("%p sql is already released or DB connection is closed, freed:%d pObj:%p signature:%p", pSql, pSql->freed,
@@ -340,10 +320,10 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet) {
       pMsg->numOfFailedBlocks = htonl(pMsg->numOfFailedBlocks);
 
       pRes->numOfRows += pMsg->affectedRows;
-      tscTrace("%p cmd:%d code:%s, inserted rows:%d, rsp len:%d", pSql, pCmd->command, tstrerror(pRes->code),
-          pMsg->affectedRows, pRes->rspLen);
+      tscTrace("%p SQL cmd:%s, code:%s inserted rows:%d rspLen:%d", pSql, sqlCmd[pCmd->command], 
+          tstrerror(pRes->code), pMsg->affectedRows, pRes->rspLen);
     } else {
-      tscTrace("%p cmd:%d code:%s rsp len:%d", pSql, pCmd->command, tstrerror(pRes->code), pRes->rspLen);
+      tscTrace("%p SQL cmd:%s, code:%s rspLen:%d", pSql, sqlCmd[pCmd->command], tstrerror(pRes->code), pRes->rspLen);
     }
   }
   
@@ -426,7 +406,7 @@ int tscProcessSql(SSqlObj *pSql) {
     assert((pQueryInfo->numOfTables == 0 && pQueryInfo->command == TSDB_SQL_HB) || pQueryInfo->numOfTables > 0);
   }
 
-  tscTrace("%p SQL cmd:%d will be processed, name:%s, type:%d", pSql, pCmd->command, name, type);
+  tscTrace("%p SQL cmd:%s will be processed, name:%s, type:%d", pSql, sqlCmd[pCmd->command], name, type);
   if (pCmd->command < TSDB_SQL_MGMT) { // the pTableMetaInfo cannot be NULL
     if (pTableMetaInfo == NULL) {
       pSql->res.code = TSDB_CODE_OTHERS;
@@ -2225,7 +2205,8 @@ int tscProcessConnectRsp(SSqlObj *pSql) {
   assert(len <= tListLen(pObj->db));
   strncpy(pObj->db, temp, tListLen(pObj->db));
   
-  tscSetMgmtIpList(&pConnect->ipList);
+  if (pConnect->ipList.numOfIps > 0) 
+    tscSetMgmtIpList(&pConnect->ipList);
 
   strcpy(pObj->sversion, pConnect->serverVersion);
   pObj->writeAuth = pConnect->writeAuth;
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 87292f4fe659adf2c0d54ad08143fbcf2ba36126..d8ec104a5072cd9331e8dfa088f3cd05f0ed1e6e 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -65,32 +65,18 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
     terrno = TSDB_CODE_INVALID_PASS;
     return NULL;
   }
-  
+
+  if (ip) {
+    if (tscSetMgmtIpListFromCfg(ip, NULL) < 0) return NULL;
+    if (port) tscMgmtIpSet.port[0] = port;
+  } 
+ 
   void *pDnodeConn = NULL;
   if (tscInitRpc(user, pass, &pDnodeConn) != 0) {
     terrno = TSDB_CODE_NETWORK_UNAVAIL;
     return NULL;
   }
-
-  tscMgmtIpSet.numOfIps = 0;
-
-  if (ip && ip[0]) {
-    tscMgmtIpSet.inUse = 0;
-    tscMgmtIpSet.numOfIps = 1;
-    strcpy(tscMgmtIpSet.fqdn[0], ip);
-    tscMgmtIpSet.port[0] = port? port: tsDnodeShellPort;
-  } else {
-    if (tsFirst[0] != 0) {
-      taosGetFqdnPortFromEp(tsFirst, tscMgmtIpSet.fqdn[tscMgmtIpSet.numOfIps], &tscMgmtIpSet.port[tscMgmtIpSet.numOfIps]);
-      tscMgmtIpSet.numOfIps++;
-    }
-
-    if (tsSecond[0] != 0) {
-      taosGetFqdnPortFromEp(tsSecond, tscMgmtIpSet.fqdn[tscMgmtIpSet.numOfIps], &tscMgmtIpSet.port[tscMgmtIpSet.numOfIps]);
-      tscMgmtIpSet.numOfIps++;
-    }
-  }
-  
+ 
   STscObj *pObj = (STscObj *)calloc(1, sizeof(STscObj));
   if (NULL == pObj) {
     terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index 5d8652a63140aa6039008c58ac83af9f7588ca4d..5d56fef1e9c9e3ea1a8f4ba6215fcd816b931011 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -23,6 +23,7 @@
 #include "tutil.h"
 #include "tsched.h"
 #include "tscLog.h"
+#include "tscUtil.h"
 #include "tsclient.h"
 #include "tglobal.h"
 #include "tconfig.h"
@@ -114,14 +115,10 @@ void taos_init_imp() {
     taosInitNote(tsNumOfLogLines / 10, 1, (char*)"tsc_note");
   }
 
-  tscMgmtIpSet.inUse = 0;
-  tscMgmtIpSet.numOfIps = 1;
-  taosGetFqdnPortFromEp(tsFirst, tscMgmtIpSet.fqdn[0], &tscMgmtIpSet.port[0]);
-
-  if (tsSecond[0] && strcmp(tsSecond, tsFirst) != 0) {
-    tscMgmtIpSet.numOfIps = 2;
-    taosGetFqdnPortFromEp(tsSecond, tscMgmtIpSet.fqdn[1], &tscMgmtIpSet.port[1]);
-  }
+  if (tscSetMgmtIpListFromCfg(tsFirst, tsSecond) < 0) {
+    tscError("failed to init mgmt IP list");
+    return;
+  } 
 
   tscInitMsgsFp();
   int queueSize = tsMaxVnodeConnections + tsMaxMeterConnections + tsMaxMgmtConnections + tsMaxMgmtConnections;
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 1d1e06d3a9a5d0bac0e4eee20f35345d65365de6..4667606aa82f2c05873a2d16d84bad1a282a53b4 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -2163,3 +2163,33 @@ char* strdup_throw(const char* str) {
   }
   return p;
 }
+
+int tscSetMgmtIpListFromCfg(const char *first, const char *second) {
+  tscMgmtIpSet.numOfIps = 0;
+  tscMgmtIpSet.inUse = 0;
+
+  if (first && first[0] != 0) {
+    if (strlen(first) >= TSDB_FQDN_LEN) {
+      terrno = TSDB_CODE_INVALID_FQDN;
+      return -1;
+    }
+    taosGetFqdnPortFromEp(first, tscMgmtIpSet.fqdn[tscMgmtIpSet.numOfIps], &tscMgmtIpSet.port[tscMgmtIpSet.numOfIps]);
+    tscMgmtIpSet.numOfIps++;
+  }
+
+  if (second && second[0] != 0) {
+    if (strlen(second) >= TSDB_FQDN_LEN) {
+      terrno = TSDB_CODE_INVALID_FQDN;
+      return -1;
+    }
+    taosGetFqdnPortFromEp(second, tscMgmtIpSet.fqdn[tscMgmtIpSet.numOfIps], &tscMgmtIpSet.port[tscMgmtIpSet.numOfIps]);
+    tscMgmtIpSet.numOfIps++;
+  }
+
+  if ( tscMgmtIpSet.numOfIps == 0) {
+    terrno = TSDB_CODE_INVALID_FQDN;
+    return -1;
+  }
+
+  return 0;
+}
diff --git a/src/common/inc/qsqltype.h b/src/common/inc/qsqltype.h
new file mode 100644
index 0000000000000000000000000000000000000000..d1e5bcaa523bfceb3f89b870acabf152c0f8ebf1
--- /dev/null
+++ b/src/common/inc/qsqltype.h
@@ -0,0 +1,111 @@
+/*
+ * 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_QSQLCMD_H
+#define TDENGINE_QSQLCMD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// sql type
+
+#ifdef TSDB_SQL_C
+#define TSDB_DEFINE_SQL_TYPE( name, msg ) msg, 
+char *sqlCmd[] = {
+  "null",
+#else
+#define TSDB_DEFINE_SQL_TYPE( name, msg ) name,
+enum {
+  TSDB_SQL_NULL = 0,
+#endif
+
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SELECT, "select" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_FETCH, "fetch" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_INSERT, "insert" )
+
+  // the SQL below is for mgmt node
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_MGMT, "mgmt" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_DB, "create-db" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_TABLE, "create-table" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_DB, "drop-db" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_TABLE, "drop-table" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_ACCT, "create-acct" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_USER, "create-user" ) 
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_ACCT, "drop-acct" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_USER, "drop-user" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_USER, "alter-user" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_ACCT, "alter-acct" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_TABLE, "alter-table" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_DB, "alter-db" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_MNODE, "create-mnode" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_MNODE, "drop-mnode" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_DNODE, "create-dnode" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_DNODE, "drop-dnode" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CFG_DNODE, "cfg-dnode" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CFG_MNODE, "cfg-mnode" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SHOW, "show" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RETRIEVE, "retrieve" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_KILL_QUERY, "kill-query" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_KILL_STREAM, "kill-stream" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_KILL_CONNECTION, "kill-connection" )
+
+  // SQL below is for read operation
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_READ, "read" )  
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CONNECT, "connect" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_USE_DB, "use-db" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_META, "meta" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_STABLEVGROUP, "stable-vgroup" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_MULTI_META, "multi-meta" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_HB, "heart-beat" )
+
+  // SQL below for client local 
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_LOCAL, "local" ) 
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DESCRIBE_TABLE, "describe-table" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RETRIEVE_LOCALMERGE, "retrieve-localmerge" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_TABLE_JOIN_RETRIEVE, "join-retrieve" )
+
+  /*
+   * build empty result instead of accessing dnode to fetch result
+   * reset the client cache
+   */
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RETRIEVE_EMPTY_RESULT, "retrieve-empty-result" )
+
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RESET_CACHE, "reset-cache" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SERV_STATUS, "serv-status" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CURRENT_DB, "current-db" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SERV_VERSION, "serv-version" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CLI_VERSION, "cli-version" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CURRENT_USER, "current-user ")
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CFG_LOCAL, "cfg-local" )
+
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_MAX, "max" )
+};
+
+// create table operation type
+enum TSQL_TYPE {
+  TSQL_CREATE_TABLE = 0x1,
+  TSQL_CREATE_STABLE = 0x2,
+  TSQL_CREATE_TABLE_FROM_STABLE = 0x3,
+  TSQL_CREATE_STREAM = 0x4,
+};
+
+extern char *sqlCmd[];
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TDENGINE_QSQLCMD_H
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index b077f40945bc3661a214d344249d083b2f2ced2e..da8f3cd1e1971518d744cbe69ac05b187a6aa412 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -175,7 +175,7 @@ void taosInitGlobalCfg();
 bool taosCheckGlobalCfg();
 void taosSetAllDebugFlag();
 bool taosCfgDynamicOptions(char *msg);
-int  taosGetFqdnPortFromEp(char *ep, char *fqdn, uint16_t *port);
+int  taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
  
 #ifdef __cplusplus
 }
diff --git a/src/common/src/sqlcmdstr.c b/src/common/src/sqlcmdstr.c
new file mode 100644
index 0000000000000000000000000000000000000000..8584ba79761835989ab7a3e24d88824c14d107c5
--- /dev/null
+++ b/src/common/src/sqlcmdstr.c
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define TSDB_SQL_C
+
+#include "qsqltype.h"
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 90637265b322b6d429c2c39f6b2f2935acee10ca..18d8c9ebe2733218dda9a24eefd24274a6265f1d 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -61,7 +61,7 @@ int32_t tscEmbedded = 0;
  */
 int64_t tsMsPerDay[] = {86400000L, 86400000000L};
 
-char  tsFirst[TSDB_FQDN_LEN] = {0};
+char  tsFirst[TSDB_FQDN_LEN] = {0};  
 char  tsSecond[TSDB_FQDN_LEN] = {0};
 char  tsArbitrator[TSDB_FQDN_LEN] = {0};
 char  tsLocalEp[TSDB_FQDN_LEN] = {0};  // Local End Point, hostname:port
@@ -1252,7 +1252,7 @@ bool taosCheckGlobalCfg() {
   return true;
 }
 
-int taosGetFqdnPortFromEp(char *ep, char *fqdn, uint16_t *port) {
+int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
   *port = 0;
   strcpy(fqdn, ep);
 
diff --git a/src/dnode/inc/dnodeMain.h b/src/dnode/inc/dnodeMain.h
new file mode 100644
index 0000000000000000000000000000000000000000..df7698ffc3246fbb419c554123b98ed74dbef9a7
--- /dev/null
+++ b/src/dnode/inc/dnodeMain.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TDENGINE_DNODE_MAIN_H
+#define TDENGINE_DNODE_MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int32_t dnodeInitSystem();
+void dnodeCleanUpSystem();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 7949a629663455e528449c748bbd992106c4e43d..2f693c61fbf5df441b57a130f7beab1cc77cd81e 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -16,8 +16,6 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 #include "taos.h"
-#include "tglobal.h"
-#include "trpc.h"
 #include "tutil.h"
 #include "tconfig.h"
 #include "tglobal.h"
@@ -29,112 +27,14 @@
 #include "dnodeVRead.h"
 #include "dnodeShell.h"
 #include "dnodeVWrite.h"
-#include "tgrant.h"
 
-static int32_t dnodeInitSystem();
 static int32_t dnodeInitStorage();
-extern void grantParseParameter();
 static void dnodeCleanupStorage();
-static void dnodeCleanUpSystem();
 static void dnodeSetRunStatus(SDnodeRunStatus status);
-static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context);
 static void dnodeCheckDataDirOpenned(char *dir);
 static SDnodeRunStatus tsDnodeRunStatus = TSDB_DNODE_RUN_STATUS_STOPPED;
 
-int32_t main(int32_t argc, char *argv[]) {
-  // Set global configuration file
-  for (int32_t i = 1; i < argc; ++i) {
-    if (strcmp(argv[i], "-c") == 0) {
-      if (i < argc - 1) {
-        strcpy(configDir, argv[++i]);
-      } else {
-        printf("'-c' requires a parameter, default:%s\n", configDir);
-        exit(EXIT_FAILURE);
-      }
-    } else if (strcmp(argv[i], "-V") == 0) {
-#ifdef _SYNC      
-      char *versionStr = "enterprise";
-#else      
-      char *versionStr = "community";
-#endif      
-      printf("%s version: %s compatible_version: %s\n", versionStr, version, compatible_version);
-      printf("gitinfo: %s\n", gitinfo);
-      printf("gitinfoI: %s\n", gitinfoOfInternal);
-      printf("buildinfo: %s\n", buildinfo);
-      exit(EXIT_SUCCESS);
-    } else if (strcmp(argv[i], "-k") == 0) {
-      grantParseParameter();
-      exit(EXIT_SUCCESS);
-    }
-#ifdef TAOS_MEM_CHECK
-    else if (strcmp(argv[i], "--alloc-random-fail") == 0) {
-      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
-        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, argv[++i], true);
-      } else {
-        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, NULL, true);
-      }
-    } else if (strcmp(argv[i], "--detect-mem-leak") == 0) {
-      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
-        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, argv[++i], true);
-      } else {
-        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, NULL, true);
-      }
-    }
-#endif
-  }
-
-  /* Set termination handler. */
-  struct sigaction act = {{0}};
-  act.sa_flags = SA_SIGINFO;
-  act.sa_sigaction = signal_handler;
-  sigaction(SIGTERM, &act, NULL);
-  sigaction(SIGHUP, &act, NULL);
-  sigaction(SIGINT, &act, NULL);
-  sigaction(SIGUSR1, &act, NULL);
-  sigaction(SIGUSR2, &act, NULL);
-
-  // Open /var/log/syslog file to record information.
-  openlog("TDengine:", LOG_PID | LOG_CONS | LOG_NDELAY, LOG_LOCAL1);
-  syslog(LOG_INFO, "Starting TDengine service...");
-
-  // Initialize the system
-  if (dnodeInitSystem() < 0) {
-    syslog(LOG_ERR, "Error initialize TDengine system");
-    closelog();
-
-    dnodeCleanUpSystem();
-    exit(EXIT_FAILURE);
-  }
-
-  syslog(LOG_INFO, "Started TDengine service successfully.");
-
-  while (1) {
-    sleep(1000);
-  }
-}
-
-static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context) {
-  if (signum == SIGUSR1) {
-    taosCfgDynamicOptions("debugFlag 135");
-    return;
-  }
-  if (signum == SIGUSR2) {
-    taosCfgDynamicOptions("resetlog");
-    return;
-  }
-  syslog(LOG_INFO, "Shut down signal is %d", signum);
-  syslog(LOG_INFO, "Shutting down TDengine service...");
-  // clean the system.
-  dPrint("shut down signal is %d, sender PID:%d", signum, sigInfo->si_pid);
-  dnodeCleanUpSystem();
-  // close the syslog
-  syslog(LOG_INFO, "Shut down TDengine service successfully");
-  dPrint("TDengine is shut down!");
-  closelog();
-  exit(EXIT_SUCCESS);
-}
-
-static int32_t dnodeInitSystem() {
+int32_t dnodeInitSystem() {
   dnodeSetRunStatus(TSDB_DNODE_RUN_STATUS_INITIALIZE);
   tscEmbedded  = 1;
   taosResolveCRC();
@@ -180,7 +80,7 @@ static int32_t dnodeInitSystem() {
   return 0;
 }
 
-static void dnodeCleanUpSystem() {
+void dnodeCleanUpSystem() {
   if (dnodeGetRunStatus() != TSDB_DNODE_RUN_STATUS_STOPPED) {
     dnodeSetRunStatus(TSDB_DNODE_RUN_STATUS_STOPPED);
     dnodeCleanupShell();
diff --git a/src/dnode/src/dnodeSystem.c b/src/dnode/src/dnodeSystem.c
new file mode 100644
index 0000000000000000000000000000000000000000..683328db29e4a4e072549d91e5e9cc7da9e6e53d
--- /dev/null
+++ b/src/dnode/src/dnodeSystem.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define _DEFAULT_SOURCE
+#include "os.h"
+#include "tgrant.h"
+#include "tutil.h"
+#include "tglobal.h"
+#include "dnodeInt.h"
+#include "dnodeMain.h"
+
+static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context);
+
+int32_t main(int32_t argc, char *argv[]) {
+  // Set global configuration file
+  for (int32_t i = 1; i < argc; ++i) {
+    if (strcmp(argv[i], "-c") == 0) {
+      if (i < argc - 1) {
+        strcpy(configDir, argv[++i]);
+      } else {
+        printf("'-c' requires a parameter, default:%s\n", configDir);
+        exit(EXIT_FAILURE);
+      }
+    } else if (strcmp(argv[i], "-V") == 0) {
+#ifdef _SYNC      
+      char *versionStr = "enterprise";
+#else      
+      char *versionStr = "community";
+#endif      
+      printf("%s version: %s compatible_version: %s\n", versionStr, version, compatible_version);
+      printf("gitinfo: %s\n", gitinfo);
+      printf("gitinfoI: %s\n", gitinfoOfInternal);
+      printf("buildinfo: %s\n", buildinfo);
+      exit(EXIT_SUCCESS);
+    } else if (strcmp(argv[i], "-k") == 0) {
+      grantParseParameter();
+      exit(EXIT_SUCCESS);
+    }
+#ifdef TAOS_MEM_CHECK
+    else if (strcmp(argv[i], "--alloc-random-fail") == 0) {
+      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
+        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, argv[++i], true);
+      } else {
+        taosSetAllocMode(TAOS_ALLOC_MODE_RANDOM_FAIL, NULL, true);
+      }
+    } else if (strcmp(argv[i], "--detect-mem-leak") == 0) {
+      if ((i < argc - 1) && (argv[i + 1][0] != '-')) {
+        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, argv[++i], true);
+      } else {
+        taosSetAllocMode(TAOS_ALLOC_MODE_DETECT_LEAK, NULL, true);
+      }
+    }
+#endif
+  }
+
+  /* Set termination handler. */
+  struct sigaction act = {{0}};
+  act.sa_flags = SA_SIGINFO;
+  act.sa_sigaction = signal_handler;
+  sigaction(SIGTERM, &act, NULL);
+  sigaction(SIGHUP, &act, NULL);
+  sigaction(SIGINT, &act, NULL);
+  sigaction(SIGUSR1, &act, NULL);
+  sigaction(SIGUSR2, &act, NULL);
+
+  // Open /var/log/syslog file to record information.
+  openlog("TDengine:", LOG_PID | LOG_CONS | LOG_NDELAY, LOG_LOCAL1);
+  syslog(LOG_INFO, "Starting TDengine service...");
+
+  // Initialize the system
+  if (dnodeInitSystem() < 0) {
+    syslog(LOG_ERR, "Error initialize TDengine system");
+    closelog();
+
+    dnodeCleanUpSystem();
+    exit(EXIT_FAILURE);
+  }
+
+  syslog(LOG_INFO, "Started TDengine service successfully.");
+
+  while (1) {
+    sleep(1000);
+  }
+}
+
+static void signal_handler(int32_t signum, siginfo_t *sigInfo, void *context) {
+  if (signum == SIGUSR1) {
+    taosCfgDynamicOptions("debugFlag 135");
+    return;
+  }
+  if (signum == SIGUSR2) {
+    taosCfgDynamicOptions("resetlog");
+    return;
+  }
+  syslog(LOG_INFO, "Shut down signal is %d", signum);
+  syslog(LOG_INFO, "Shutting down TDengine service...");
+  // clean the system.
+  dPrint("shut down signal is %d, sender PID:%d", signum, sigInfo->si_pid);
+  dnodeCleanUpSystem();
+  // close the syslog
+  syslog(LOG_INFO, "Shut down TDengine service successfully");
+  dPrint("TDengine is shut down!");
+  closelog();
+  exit(EXIT_SUCCESS);
+}
diff --git a/src/dnode/src/dnodeVRead.c b/src/dnode/src/dnodeVRead.c
index aaf71838bfe2cc3916f10c579bd89e34acb89553..aa8cd997858c7ad27a02d751b00e765fc176d327 100644
--- a/src/dnode/src/dnodeVRead.c
+++ b/src/dnode/src/dnodeVRead.c
@@ -92,8 +92,6 @@ void dnodeDispatchToVnodeReadQueue(SRpcMsg *pMsg) {
   char        *pCont       = (char *) pMsg->pCont;
   void        *pVnode;  
 
-  dTrace("dnode %s msg incoming, thandle:%p", taosMsg[pMsg->msgType], pMsg->handle);
-
   while (leftLen > 0) {
     SMsgHead *pHead = (SMsgHead *) pCont;
     pHead->vgId    = htonl(pHead->vgId);
@@ -214,6 +212,7 @@ static void *dnodeProcessReadQueue(void *param) {
       continue;
     }
 
+    dTrace("%p, msg:%s will be processed", pReadMsg->rpcMsg.ahandle, taosMsg[pReadMsg->rpcMsg.msgType]);
     int32_t code = vnodeProcessRead(pVnode, pReadMsg->rpcMsg.msgType, pReadMsg->pCont, pReadMsg->contLen, &pReadMsg->rspRet);
     dnodeSendRpcReadRsp(pVnode, pReadMsg, code);
     taosFreeQitem(pReadMsg);
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index 5de4c16c500258fe5f3d5d7588bc8782530d8791..879082f223e27537f8f0dbd8a4e6cc53fce5117b 100644
--- a/src/dnode/src/dnodeVWrite.c
+++ b/src/dnode/src/dnodeVWrite.c
@@ -200,6 +200,7 @@ static void *dnodeProcessWriteQueue(void *param) {
         pHead->msgType = pWrite->rpcMsg.msgType;
         pHead->version = 0;
         pHead->len = pWrite->contLen;
+        dTrace("%p, msg:%s will be processed", pWrite->rpcMsg.ahandle, taosMsg[pWrite->rpcMsg.msgType]);
       } else {
         pHead = (SWalHead *)item;
       }
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 61e82720b123a1249c6bfeefa99366b99a58a8a7..ba015d7bbfbae0d3a386359bcd918316888ac307 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -218,7 +218,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_LOCALE_LEN           64
 #define TSDB_TIMEZONE_LEN         64
 
-#define TSDB_FQDN_LEN             72
+#define TSDB_FQDN_LEN             256
 #define TSDB_IPv4ADDR_LEN      	  16
 #define TSDB_FILENAME_LEN         128
 #define TSDB_METER_VNODE_BITS     20
@@ -234,7 +234,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_DEFAULT_PKT_SIZE     65480  //same as RPC_MAX_UDP_SIZE
 
 #define TSDB_PAYLOAD_SIZE         (TSDB_DEFAULT_PKT_SIZE - 100)
-#define TSDB_DEFAULT_PAYLOAD_SIZE 1024   // default payload size
+#define TSDB_DEFAULT_PAYLOAD_SIZE 2048   // default payload size
 #define TSDB_EXTRA_PAYLOAD_SIZE   128    // extra bytes for auth
 #define TSDB_CQ_SQL_SIZE          1024
 #define TSDB_MAX_VNODES           256
diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index f9bc1404fe2895ac26b43ec08ffb0a8bc21df67d..1390d66113ac9bd5f184947dd27ec4ebf4baaac6 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -170,6 +170,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_QHANDLE,            0, 459, "invalid handle"
 TAOS_DEFINE_ERROR(TSDB_CODE_QUERY_CANCELLED,            0, 460, "query cancelled")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_IE,                 0, 461, "invalid ie")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_VALUE,              0, 462, "invalid value")
+TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_FQDN,               0, 463, "invalid FQDN")
 
 // others
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_FILE_FORMAT,        0, 500, "invalid file format")
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index e58bcf52371084ad254ce9d69c1ab87d99382bfa..27862ef4894a3ff9914b95fda110789f18205cfc 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -187,13 +187,13 @@ typedef struct SMsgHead {
 
 // Submit message for one table
 typedef struct SSubmitBlk {
-  int64_t uid;        // table unique id
-  int32_t tid;        // table id
-  int32_t padding;    // TODO just for padding here
-  int32_t sversion;   // data schema version
-  int32_t len;        // data part length, not including the SSubmitBlk head
-  int16_t numOfRows;  // total number of rows in current submit block
-  char    data[];
+  uint64_t uid;        // table unique id
+  int32_t  tid;        // table id
+  int32_t  padding;    // TODO just for padding here
+  int32_t  sversion;   // data schema version
+  int32_t  len;        // data part length, not including the SSubmitBlk head
+  int16_t  numOfRows;  // total number of rows in current submit block
+  char     data[];
 } SSubmitBlk;
 
 // Submit message for this TSDB
@@ -236,6 +236,7 @@ typedef struct {
   int16_t  numOfTags;
   int32_t  sid;
   int32_t  sversion;
+  int32_t  tversion;
   int32_t  tagDataLen;
   int32_t  sqlDataLen;
   uint64_t uid;
@@ -327,9 +328,9 @@ typedef struct {
 } SMDDropTableMsg;
 
 typedef struct {
-  int32_t contLen;
-  int32_t vgId;
-  int64_t uid;
+  int32_t  contLen;
+  int32_t  vgId;
+  uint64_t uid;
   char    tableId[TSDB_TABLE_ID_LEN + 1];
 } SMDDropSTableMsg;
 
@@ -404,9 +405,9 @@ typedef struct SColumnInfo {
 } SColumnInfo;
 
 typedef struct STableIdInfo {
-  int64_t uid;
-  int32_t tid;
-  TSKEY   key;  // last accessed ts, for subscription
+  uint64_t uid;
+  int32_t  tid;
+  TSKEY    key;  // last accessed ts, for subscription
 } STableIdInfo;
 
 typedef struct STimeWindow {
@@ -632,6 +633,7 @@ typedef struct STableMetaMsg {
   uint8_t       tableType;
   int16_t       numOfColumns;
   int16_t       sversion;
+  int16_t       tversion;
   int32_t       sid;
   uint64_t      uid;
   SCMVgroupInfo vgroup;
diff --git a/src/inc/trpc.h b/src/inc/trpc.h
index eff210433f7d7bcc2f4a5ad1d12bd88ed59581be..16223b813a1a738f6b0213e8d6c4f62cd0c2290c 100644
--- a/src/inc/trpc.h
+++ b/src/inc/trpc.h
@@ -48,6 +48,7 @@ typedef struct {
   int     contLen;
   int32_t code;
   void   *handle;
+  void   *ahandle;  //app handle set by client, for debug purpose
 } SRpcMsg;
 
 typedef struct {
diff --git a/src/kit/shell/inc/shell.h b/src/kit/shell/inc/shell.h
index 381c6f1dbfcc9f4351919b7602a26be206248f0b..549b0ef9775c073847c9aa7da8054509894cad3a 100644
--- a/src/kit/shell/inc/shell.h
+++ b/src/kit/shell/inc/shell.h
@@ -41,14 +41,13 @@
 // dynamic config timestamp width according to maximum time precision
 extern int32_t TIMESTAMP_OUTPUT_LENGTH;
 
-typedef struct History History;
-struct History {
+typedef struct SShellHistory {
   char* hist[MAX_HISTORY_SIZE];
   int   hstart;
   int   hend;
-};
+} SShellHistory;
 
-struct arguments {
+typedef struct SShellArguments {
   char* host;
   char* password;
   char* user;
@@ -62,11 +61,11 @@ struct arguments {
   char* commands;
   int   abort;
   int   port;
-};
+} SShellArguments;
 
 /**************** Function declarations ****************/
-extern void shellParseArgument(int argc, char* argv[], struct arguments* arguments);
-extern TAOS* shellInit(struct arguments* args);
+extern void shellParseArgument(int argc, char* argv[], SShellArguments* arguments);
+extern TAOS* shellInit(SShellArguments* args);
 extern void* shellLoopQuery(void* arg);
 extern void taos_error(TAOS* con);
 extern int regex_match(const char* s, const char* reg, int cflags);
@@ -76,7 +75,7 @@ void shellRunCommandOnServer(TAOS* con, char command[]);
 void read_history();
 void write_history();
 void source_file(TAOS* con, char* fptr);
-void source_dir(TAOS* con, struct arguments* args);
+void source_dir(TAOS* con, SShellArguments* args);
 void get_history_path(char* history);
 void cleanup_handler(void* arg);
 void exitShell();
@@ -89,12 +88,12 @@ int isCommentLine(char *line);
 extern char           PROMPT_HEADER[];
 extern char           CONTINUE_PROMPT[];
 extern int            prompt_size;
-extern History        history;
+extern SShellHistory  history;
 extern struct termios oldtio;
 extern void           set_terminal_mode();
 extern int get_old_terminal_mode(struct termios* tio);
-extern void             reset_terminal_mode();
-extern struct arguments args;
-extern TAOS_RES*        result;
+extern void            reset_terminal_mode();
+extern SShellArguments args;
+extern TAOS_RES*       result;
 
 #endif
diff --git a/src/kit/shell/src/shellEngine.c b/src/kit/shell/src/shellEngine.c
index 69475371dcf1fee1ae1296eec9b344cdc92290a5..dbb05f6a359fc501d7561444dc032ffa37462877 100644
--- a/src/kit/shell/src/shellEngine.c
+++ b/src/kit/shell/src/shellEngine.c
@@ -33,12 +33,12 @@ char      PROMPT_HEADER[] = "taos> ";
 char      CONTINUE_PROMPT[] = "   -> ";
 int       prompt_size = 6;
 TAOS_RES *result = NULL;
-History   history;
+SShellHistory   history;
 
 /*
  * FUNCTION: Initialize the shell.
  */
-TAOS *shellInit(struct arguments *args) {
+TAOS *shellInit(SShellArguments *args) {
   printf("\n");
   printf(CLIENT_VERSION, tsOsName, taos_get_client_info());
   fflush(stdout);
diff --git a/src/kit/shell/src/shellImport.c b/src/kit/shell/src/shellImport.c
index b29b96379b5def3ddb60e58400b58c721dc27b7b..2cbd07db4bdee34a52edd1573dd0aa923aec35ad 100644
--- a/src/kit/shell/src/shellImport.c
+++ b/src/kit/shell/src/shellImport.c
@@ -221,7 +221,7 @@ void* shellImportThreadFp(void *arg)
   return NULL;
 }
 
-static void shellRunImportThreads(struct arguments* args)
+static void shellRunImportThreads(SShellArguments* args)
 {
   pthread_attr_t thattr;
   ShellThreadObj *threadObj = (ShellThreadObj *)calloc(args->threadNum, sizeof(ShellThreadObj));
@@ -254,7 +254,7 @@ static void shellRunImportThreads(struct arguments* args)
   free(threadObj);
 }
 
-void source_dir(TAOS* con, struct arguments* args) {
+void source_dir(TAOS* con, SShellArguments* args) {
   shellGetDirectoryFileList(args->dir);
   int64_t start = taosGetTimestampMs();
 
diff --git a/src/kit/shell/src/shellLinux.c b/src/kit/shell/src/shellLinux.c
index f5a1145cf8994c01dded1685b9e8e70406e51013..da2bd94814da4dfd2b83318e61a0dfaffdf4116d 100644
--- a/src/kit/shell/src/shellLinux.c
+++ b/src/kit/shell/src/shellLinux.c
@@ -50,7 +50,7 @@ static struct argp_option options[] = {
 static error_t parse_opt(int key, char *arg, struct argp_state *state) {
   /* Get the input argument from argp_parse, which we
   know is a pointer to our arguments structure. */
-  struct arguments *arguments = state->input;
+  SShellArguments *arguments = state->input;
   wordexp_t full_path;
 
   switch (key) {
@@ -129,7 +129,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
 /* Our argp parser. */
 static struct argp argp = {options, parse_opt, args_doc, doc};
 
-void shellParseArgument(int argc, char *argv[], struct arguments *arguments) {
+void shellParseArgument(int argc, char *argv[], SShellArguments *arguments) {
   static char verType[32] = {0};
   sprintf(verType, "version: %s\n", version);
 
diff --git a/src/kit/shell/src/shellMain.c b/src/kit/shell/src/shellMain.c
index b39fba285ff09a5e83632e17299565fcd1b4a943..f8010b84cd24d3c0282b0366bb38315463428a71 100644
--- a/src/kit/shell/src/shellMain.c
+++ b/src/kit/shell/src/shellMain.c
@@ -62,7 +62,7 @@ int checkVersion() {
 }
 
 // Global configurations
-struct arguments args = {
+SShellArguments args = {
   .host = NULL,
   .password = NULL,
   .user = NULL,
diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 33b76cea2deaa8b54d844b0002fbf648d1822599..3cacafa50501cfd0cf677c92327df499bff7a220 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -67,7 +67,7 @@ static struct argp_option options[] = {
   {0}};
 
 /* Used by main to communicate with parse_opt. */
-struct arguments {
+typedef struct DemoArguments {
   char  *host;
   uint16_t    port;
   char  *user;
@@ -87,13 +87,13 @@ struct arguments {
   int    num_of_DPT;
   int    abort;
   char **arg_list;
-};
+} SDemoArguments;
 
 /* Parse a single option. */
 static error_t parse_opt(int key, char *arg, struct argp_state *state) {
   /* Get the input argument from argp_parse, which we
      know is a pointer to our arguments structure. */
-  struct arguments *arguments = state->input;
+  SDemoArguments *arguments = state->input;
   wordexp_t full_path;
   char **sptr;
   switch (key) {
@@ -269,7 +269,7 @@ double getCurrentTime();
 void callBack(void *param, TAOS_RES *res, int code);
 
 int main(int argc, char *argv[]) {
-  struct arguments arguments = {NULL,            // host
+  SDemoArguments arguments = {NULL,            // host
                                 0,               // port
                                 "root",          // user
                                 "taosdata",      // password
diff --git a/src/kit/taosdump/taosdump.c b/src/kit/taosdump/taosdump.c
index ed98a9b92c517b4387b8144cf5a8082e91384ad2..adba0911369731624934cacf9be350c4e1972745 100644
--- a/src/kit/taosdump/taosdump.c
+++ b/src/kit/taosdump/taosdump.c
@@ -168,7 +168,7 @@ static struct argp_option options[] = {
   {0}};
 
 /* Used by main to communicate with parse_opt. */
-struct arguments {
+typedef struct SDumpArguments {
   // connection option
   char *host;
   char *user;
@@ -193,13 +193,13 @@ struct arguments {
   char **arg_list;
   int arg_list_len;
   bool isDumpIn;
-};
+} SDumpArguments;
 
 /* Parse a single option. */
 static error_t parse_opt(int key, char *arg, struct argp_state *state) {
   /* Get the input argument from argp_parse, which we
      know is a pointer to our arguments structure. */
-  struct arguments *arguments = state->input;
+  SDumpArguments *arguments = state->input;
   wordexp_t full_path;
 
   switch (key) {
@@ -296,31 +296,31 @@ char *command = NULL;
 char *lcommand = NULL;
 char *buffer = NULL;
 
-int taosDumpOut(struct arguments *arguments);
+int taosDumpOut(SDumpArguments *arguments);
 
-int taosDumpIn(struct arguments *arguments);
+int taosDumpIn(SDumpArguments *arguments);
 
 void taosDumpCreateDbClause(SDbInfo *dbInfo, bool isDumpProperty, FILE *fp);
 
-int taosDumpDb(SDbInfo *dbInfo, struct arguments *arguments, FILE *fp);
+int taosDumpDb(SDbInfo *dbInfo, SDumpArguments *arguments, FILE *fp);
 
-void taosDumpCreateTableClause(STableDef *tableDes, int numOfCols, struct arguments *arguments, FILE *fp);
+void taosDumpCreateTableClause(STableDef *tableDes, int numOfCols, SDumpArguments *arguments, FILE *fp);
 
-void taosDumpCreateMTableClause(STableDef *tableDes, char *metric, int numOfCols, struct arguments *arguments,
+void taosDumpCreateMTableClause(STableDef *tableDes, char *metric, int numOfCols, SDumpArguments *arguments,
                                    FILE *fp);
 
-int32_t taosDumpTable(char *table, char *metric, struct arguments *arguments, FILE *fp);
+int32_t taosDumpTable(char *table, char *metric, SDumpArguments *arguments, FILE *fp);
 
-int32_t taosDumpMetric(char *metric, struct arguments *arguments, FILE *fp);
+int32_t taosDumpMetric(char *metric, SDumpArguments *arguments, FILE *fp);
 
-int taosDumpTableData(FILE *fp, char *tbname, struct arguments *arguments);
+int taosDumpTableData(FILE *fp, char *tbname, SDumpArguments *arguments);
 
-int taosCheckParam(struct arguments *arguments);
+int taosCheckParam(SDumpArguments *arguments);
 
 void taosFreeDbInfos();
 
 int main(int argc, char *argv[]) {
-  struct arguments arguments = {
+  SDumpArguments arguments = {
     // connection option
     NULL, "root", "taosdata", 0,
     // output file
@@ -424,7 +424,7 @@ int taosGetTableRecordInfo(char *table, STableRecordInfo *pTableRecordInfo) {
   return -1;
 }
 
-int taosDumpOut(struct arguments *arguments) {
+int taosDumpOut(SDumpArguments *arguments) {
   TAOS_ROW row;
   char *temp = NULL;
   FILE *fp = NULL;
@@ -602,7 +602,7 @@ void taosDumpCreateDbClause(SDbInfo *dbInfo, bool isDumpProperty, FILE *fp) {
   fprintf(fp, "%s\n\n", buffer);
 }
 
-int taosDumpDb(SDbInfo *dbInfo, struct arguments *arguments, FILE *fp) {
+int taosDumpDb(SDbInfo *dbInfo, SDumpArguments *arguments, FILE *fp) {
   TAOS_ROW row;
   int fd = -1;
   STableRecord tableRecord;
@@ -660,7 +660,7 @@ int taosDumpDb(SDbInfo *dbInfo, struct arguments *arguments, FILE *fp) {
   return 0;
 }
 
-void taosDumpCreateTableClause(STableDef *tableDes, int numOfCols, struct arguments *arguments, FILE *fp) {
+void taosDumpCreateTableClause(STableDef *tableDes, int numOfCols, SDumpArguments *arguments, FILE *fp) {
   char *pstr = NULL;
   pstr = buffer;
   int counter = 0;
@@ -703,7 +703,7 @@ void taosDumpCreateTableClause(STableDef *tableDes, int numOfCols, struct argume
   fprintf(fp, "%s\n\n", buffer);
 }
 
-void taosDumpCreateMTableClause(STableDef *tableDes, char *metric, int numOfCols, struct arguments *arguments,
+void taosDumpCreateMTableClause(STableDef *tableDes, char *metric, int numOfCols, SDumpArguments *arguments,
                                 FILE *fp) {
   char *pstr = NULL;
   pstr = buffer;
@@ -786,7 +786,7 @@ int taosGetTableDes(char *table, STableDef *tableDes) {
   return count;
 }
 
-int32_t taosDumpTable(char *table, char *metric, struct arguments *arguments, FILE *fp) {
+int32_t taosDumpTable(char *table, char *metric, SDumpArguments *arguments, FILE *fp) {
   int count = 0;
 
   STableDef *tableDes = (STableDef *)calloc(1, sizeof(STableDef) + sizeof(SColDes) * TSDB_MAX_COLUMNS);
@@ -828,7 +828,7 @@ int32_t taosDumpTable(char *table, char *metric, struct arguments *arguments, FI
   return taosDumpTableData(fp, table, arguments);
 }
 
-int32_t taosDumpMetric(char *metric, struct arguments *arguments, FILE *fp) {
+int32_t taosDumpMetric(char *metric, SDumpArguments *arguments, FILE *fp) {
   TAOS_ROW row = NULL;
   int fd = -1;
   STableRecord tableRecord;
@@ -877,7 +877,7 @@ int32_t taosDumpMetric(char *metric, struct arguments *arguments, FILE *fp) {
   return 0;
 }
 
-int taosDumpTableData(FILE *fp, char *tbname, struct arguments *arguments) {
+int taosDumpTableData(FILE *fp, char *tbname, SDumpArguments *arguments) {
   /* char       temp[MAX_COMMAND_SIZE] = "\0"; */
   int count = 0;
   char *pstr = NULL;
@@ -987,7 +987,7 @@ int taosDumpTableData(FILE *fp, char *tbname, struct arguments *arguments) {
   return 0;
 }
 
-int taosCheckParam(struct arguments *arguments) {
+int taosCheckParam(SDumpArguments *arguments) {
   if (arguments->all_databases && arguments->databases) {
     fprintf(stderr, "conflict option --all-databases and --databases\n");
     return -1;
@@ -1072,7 +1072,7 @@ void taosReplaceCtrlChar(char *str) {
   *pstr = '\0';
 }
 
-int taosDumpIn(struct arguments *arguments) {
+int taosDumpIn(SDumpArguments *arguments) {
   assert(arguments->isDumpIn);
 
   int     tsize = 0;
diff --git a/src/mnode/inc/mgmtDef.h b/src/mnode/inc/mgmtDef.h
index 894ee870999864b7e2e6a414b6db063a8f106f79..7c1fd6c5abfd1de6cd1475dcdf3fffacc313e9bb 100644
--- a/src/mnode/inc/mgmtDef.h
+++ b/src/mnode/inc/mgmtDef.h
@@ -77,6 +77,7 @@ typedef struct SSuperTableObj {
   uint64_t   uid;
   int64_t    createdTime;
   int32_t    sversion;
+  int32_t    tversion;
   int32_t    numOfColumns;
   int32_t    numOfTags;
   int8_t     reserved[15];
diff --git a/src/mnode/src/mgmtShell.c b/src/mnode/src/mgmtShell.c
index 804572b9ffbf52259a333c0e45bf44a5a1c0f160..d8bcf6724236d6e7bfa1e4372797a78ab95aa1e3 100644
--- a/src/mnode/src/mgmtShell.c
+++ b/src/mnode/src/mgmtShell.c
@@ -124,6 +124,8 @@ void mgmtDealyedAddToShellQueue(SQueuedMsg *queuedMsg) {
 
 void mgmtProcessMsgFromShell(SRpcMsg *rpcMsg) {
 
+  mTrace("%p, msg:%s will be processed", rpcMsg->ahandle, taosMsg[rpcMsg->msgType]);
+
   if (rpcMsg->pCont == NULL) {
     mgmtSendSimpleResp(rpcMsg->handle, TSDB_CODE_INVALID_MSG_LEN);
     return;
diff --git a/src/mnode/src/mgmtTable.c b/src/mnode/src/mgmtTable.c
index 50f24eef9f6266d6d503114ec8d3aec20ef3e280..de8f2f0ab0eef21fd0485fca9d4b2d07824681b5 100644
--- a/src/mnode/src/mgmtTable.c
+++ b/src/mnode/src/mgmtTable.c
@@ -763,6 +763,7 @@ static void mgmtProcessCreateSuperTableMsg(SQueuedMsg *pMsg) {
   pStable->createdTime  = taosGetTimestampMs();
   pStable->uid          = (((uint64_t) pStable->createdTime) << 16) + (sdbGetVersion() & ((1ul << 16) - 1ul));
   pStable->sversion     = 0;
+  pStable->tversion     = 0;
   pStable->numOfColumns = htons(pCreate->numOfColumns);
   pStable->numOfTags    = htons(pCreate->numOfTags);
 
@@ -882,7 +883,7 @@ static int32_t mgmtAddSuperTableTag(SSuperTableObj *pStable, SSchema schema[], i
   }
 
   pStable->numOfTags += ntags;
-  pStable->sversion++;
+  pStable->tversion++;
 
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
@@ -909,7 +910,7 @@ static int32_t mgmtDropSuperTableTag(SSuperTableObj *pStable, char *tagName) {
   memmove(pStable->schema + pStable->numOfColumns + col, pStable->schema + pStable->numOfColumns + col + 1,
           sizeof(SSchema) * (pStable->numOfTags - col - 1));
   pStable->numOfTags--;
-  pStable->sversion++;
+  pStable->tversion++;
 
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
@@ -1235,6 +1236,7 @@ static void mgmtGetSuperTableMeta(SQueuedMsg *pMsg) {
   STableMetaMsg *pMeta   = rpcMallocCont(sizeof(STableMetaMsg) + sizeof(SSchema) * (TSDB_MAX_TAGS + TSDB_MAX_COLUMNS + 16));
   pMeta->uid          = htobe64(pTable->uid);
   pMeta->sversion     = htons(pTable->sversion);
+  pMeta->tversion     = htons(pTable->tversion);
   pMeta->precision    = pMsg->pDb->cfg.precision;
   pMeta->numOfTags    = (uint8_t)pTable->numOfTags;
   pMeta->numOfColumns = htons((int16_t)pTable->numOfColumns);
@@ -1358,12 +1360,14 @@ static void *mgmtBuildCreateChildTableMsg(SCMCreateTableMsg *pMsg, SChildTableOb
     pCreate->numOfColumns  = htons(pTable->superTable->numOfColumns);
     pCreate->numOfTags     = htons(pTable->superTable->numOfTags);
     pCreate->sversion      = htonl(pTable->superTable->sversion);
+    pCreate->tversion      = htonl(pTable->superTable->tversion);
     pCreate->tagDataLen    = htonl(tagDataLen);
     pCreate->superTableUid = htobe64(pTable->superTable->uid);
   } else {
     pCreate->numOfColumns  = htons(pTable->numOfColumns);
     pCreate->numOfTags     = 0;
     pCreate->sversion      = htonl(pTable->sversion);
+    pCreate->tversion      = 0;
     pCreate->tagDataLen    = 0;
     pCreate->superTableUid = 0;
   }
@@ -1686,15 +1690,17 @@ static int32_t mgmtDoGetChildTableMeta(SQueuedMsg *pMsg, STableMetaMsg *pMeta) {
   pMeta->sid       = htonl(pTable->sid);
   pMeta->precision = pDb->cfg.precision;
   pMeta->tableType = pTable->info.type;
-  strncpy(pMeta->tableId, pTable->info.tableId, tListLen(pTable->info.tableId));
+  strncpy(pMeta->tableId, pTable->info.tableId, strlen(pTable->info.tableId));
 
   if (pTable->info.type == TSDB_CHILD_TABLE) {
     pMeta->sversion     = htons(pTable->superTable->sversion);
+    pMeta->tversion     = htons(pTable->superTable->tversion);
     pMeta->numOfTags    = (int8_t)pTable->superTable->numOfTags;
     pMeta->numOfColumns = htons((int16_t)pTable->superTable->numOfColumns);
     pMeta->contLen      = sizeof(STableMetaMsg) + mgmtSetSchemaFromSuperTable(pMeta->schema, pTable->superTable);
   } else {
     pMeta->sversion     = htons(pTable->sversion);
+    pMeta->tversion     = 0;
     pMeta->numOfTags    = 0;
     pMeta->numOfColumns = htons((int16_t)pTable->numOfColumns);
     pMeta->contLen      = sizeof(STableMetaMsg) + mgmtSetSchemaFromNormalTable(pMeta->schema, pTable); 
diff --git a/src/query/inc/qsqltype.h b/src/query/inc/qsqltype.h
deleted file mode 100644
index 4087be49eeac3042f04013b9e929fce30d323cea..0000000000000000000000000000000000000000
--- a/src/query/inc/qsqltype.h
+++ /dev/null
@@ -1,96 +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_QSQLCMD_H
-#define TDENGINE_QSQLCMD_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-enum _sql_type {
-  TSDB_SQL_SELECT = 1,
-  TSDB_SQL_FETCH,
-  TSDB_SQL_INSERT,
-
-  TSDB_SQL_MGMT,  // the SQL below is for mgmt node
-  TSDB_SQL_CREATE_DB,
-  TSDB_SQL_CREATE_TABLE,
-  TSDB_SQL_DROP_DB,
-  TSDB_SQL_DROP_TABLE,
-  TSDB_SQL_CREATE_ACCT,
-  TSDB_SQL_CREATE_USER,  // 10
-  TSDB_SQL_DROP_ACCT,
-  TSDB_SQL_DROP_USER,
-  TSDB_SQL_ALTER_USER,
-  TSDB_SQL_ALTER_ACCT,
-  TSDB_SQL_ALTER_TABLE,
-  TSDB_SQL_ALTER_DB,
-  TSDB_SQL_CREATE_MNODE,
-  TSDB_SQL_DROP_MNODE,
-  TSDB_SQL_CREATE_DNODE,
-  TSDB_SQL_DROP_DNODE,  // 20
-  TSDB_SQL_CFG_DNODE,
-  TSDB_SQL_CFG_MNODE,
-  TSDB_SQL_SHOW,
-  TSDB_SQL_RETRIEVE,
-  TSDB_SQL_KILL_QUERY,
-  TSDB_SQL_KILL_STREAM,
-  TSDB_SQL_KILL_CONNECTION,
-
-  TSDB_SQL_READ,  // SQL below is for read operation
-  TSDB_SQL_CONNECT,
-  TSDB_SQL_USE_DB,  // 30
-  TSDB_SQL_META,
-  TSDB_SQL_STABLEVGROUP,
-  TSDB_SQL_MULTI_META,
-  TSDB_SQL_HB,
-
-  TSDB_SQL_LOCAL,  // SQL below for client local
-  TSDB_SQL_DESCRIBE_TABLE,
-  TSDB_SQL_RETRIEVE_LOCALMERGE,
-  TSDB_SQL_TABLE_JOIN_RETRIEVE,
-
-  /*
-   * build empty result instead of accessing dnode to fetch result
-   * reset the client cache
-   */
-  TSDB_SQL_RETRIEVE_EMPTY_RESULT,
-
-  TSDB_SQL_RESET_CACHE,    // 40
-  TSDB_SQL_SERV_STATUS,
-  TSDB_SQL_CURRENT_DB,
-  TSDB_SQL_SERV_VERSION,
-  TSDB_SQL_CLI_VERSION,
-  TSDB_SQL_CURRENT_USER,
-  TSDB_SQL_CFG_LOCAL,
-
-  TSDB_SQL_MAX  // 47
-};
-
-
-// create table operation type
-enum TSQL_TYPE {
-  TSQL_CREATE_TABLE = 0x1,
-  TSQL_CREATE_STABLE = 0x2,
-  TSQL_CREATE_TABLE_FROM_STABLE = 0x3,
-  TSQL_CREATE_STREAM = 0x4,
-};
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // TDENGINE_QSQLCMD_H
diff --git a/src/rpc/inc/rpcHead.h b/src/rpc/inc/rpcHead.h
index 8b5410a596ae64a27ebecc9e3591fa90de044323..520edadc7dd072849720cad53c7f6f4ba605a06c 100644
--- a/src/rpc/inc/rpcHead.h
+++ b/src/rpc/inc/rpcHead.h
@@ -49,6 +49,7 @@ typedef struct {
   char     encrypt:3; // encrypt algorithm, 0: no encryption
   uint16_t tranId;    // transcation ID
   uint32_t linkUid;   // for unique connection ID assigned by client
+  uint64_t ahandle;   // ahandle assigned by client 
   uint32_t sourceId;  // source ID, an index for connection list  
   uint32_t destId;    // destination ID, an index for connection list
   uint32_t destIp;    // destination IP address, for NAT scenario
diff --git a/src/rpc/src/rpcCache.c b/src/rpc/src/rpcCache.c
index edbb9b3e12be6dc24acfbb60fff1f91fe8e1c898..7a96571ab9d1a220e98d6d48a817fcc251097374 100644
--- a/src/rpc/src/rpcCache.c
+++ b/src/rpc/src/rpcCache.c
@@ -146,7 +146,7 @@ void rpcAddConnIntoCache(void *handle, void *data, char *fqdn, uint16_t port, in
   rpcUnlockCache(pCache->lockedBy+hash);
 
   pCache->total++;
-  tTrace("%p %s:%hu:%d:%d:%p added into cache, connections:%d", data, fqdn, port, connType, hash, pNode, pCache->count[hash]);
+  // tTrace("%p %s:%hu:%d:%d:%p added into cache, connections:%d", data, fqdn, port, connType, hash, pNode, pCache->count[hash]);
 
   return;
 }
@@ -200,9 +200,9 @@ void *rpcGetConnFromCache(void *handle, char *fqdn, uint16_t port, int8_t connTy
   rpcUnlockCache(pCache->lockedBy+hash);
 
   if (pData) {
-    tTrace("%p %s:%hu:%d:%d:%p retrieved from cache, connections:%d", pData, fqdn, port, connType, hash, pNode, pCache->count[hash]);
+    //tTrace("%p %s:%hu:%d:%d:%p retrieved from cache, connections:%d", pData, fqdn, port, connType, hash, pNode, pCache->count[hash]);
   } else {
-    tTrace("%s:%hu:%d:%d failed to retrieve conn from cache, connections:%d", fqdn, port, connType, hash, pCache->count[hash]);
+    //tTrace("%s:%hu:%d:%d failed to retrieve conn from cache, connections:%d", fqdn, port, connType, hash, pCache->count[hash]);
   }
 
   return pData;
@@ -240,8 +240,8 @@ static void rpcRemoveExpiredNodes(SConnCache *pCache, SConnHash *pNode, int hash
     pNext = pNode->next;
     pCache->total--;
     pCache->count[hash]--;
-    tTrace("%p %s:%hu:%d:%d:%p removed from cache, connections:%d", pNode->data, pNode->fqdn, pNode->port, pNode->connType, hash, pNode,
-             pCache->count[hash]);
+    //tTrace("%p %s:%hu:%d:%d:%p removed from cache, connections:%d", pNode->data, pNode->fqdn, pNode->port, pNode->connType, hash, pNode,
+    //         pCache->count[hash]);
     taosMemPoolFree(pCache->connHashMemPool, (char *)pNode);
     pNode = pNext;
   }
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index ff96306beaf08cec37465041d85338a74a1c3f19..445e542387961cde730943f02a56c2d9fe81d610 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -87,6 +87,7 @@ typedef struct {
 } SRpcReqContext;
 
 typedef struct SRpcConn {
+  char      info[50];// debug info: label + pConn + ahandle
   int       sid;     // session ID
   uint32_t  ownId;   // own link ID
   uint32_t  peerId;  // peer link ID
@@ -275,7 +276,7 @@ void *rpcOpen(const SRpcInit *pInit) {
     return NULL;
   }
 
-  tTrace("%s RPC is openned, numOfThreads:%d", pRpc->label, pRpc->numOfThreads);
+  tTrace("%s rpc is openned, threads:%d sessions:%d", pRpc->label, pRpc->numOfThreads, pInit->sessions);
 
   return pRpc;
 }
@@ -299,7 +300,7 @@ void rpcClose(void *param) {
 
   tfree(pRpc->connList);
   pthread_mutex_destroy(&pRpc->mutex);
-  tTrace("%s RPC is closed", pRpc->label);
+  tTrace("%s rpc is closed", pRpc->label);
   tfree(pRpc);
 }
 
@@ -375,8 +376,6 @@ void rpcSendRequest(void *shandle, const SRpcIpSet *pIpSet, const SRpcMsg *pMsg)
 void rpcSendResponse(const SRpcMsg *pRsp) {
   int        msgLen = 0;
   SRpcConn  *pConn = (SRpcConn *)pRsp->handle;
-  SRpcInfo  *pRpc = pConn->pRpc;
-
   SRpcMsg    rpcMsg = *pRsp;
   SRpcMsg   *pMsg = &rpcMsg;
 
@@ -394,7 +393,7 @@ void rpcSendResponse(const SRpcMsg *pRsp) {
   rpcLockConn(pConn);
 
   if ( pConn->inType == 0 || pConn->user[0] == 0 ) {
-    tTrace("%s %p, connection is already released, rsp wont be sent", pRpc->label, pConn);
+    tTrace("%s, connection is already released, rsp wont be sent", pConn->info);
     rpcUnlockConn(pConn);
     return;
   }
@@ -410,7 +409,8 @@ void rpcSendResponse(const SRpcMsg *pRsp) {
   pHead->linkUid = pConn->linkUid;
   pHead->port = htons(pConn->localPort);
   pHead->code = htonl(pMsg->code);
-
+  pHead->ahandle = (uint64_t) pConn->ahandle;
+ 
   // set pConn parameters
   pConn->inType = 0;
 
@@ -492,6 +492,7 @@ static SRpcConn *rpcOpenConn(SRpcInfo *pRpc, char *peerFqdn, uint16_t peerPort,
   uint32_t peerIp = taosGetIpFromFqdn(peerFqdn);
   if (peerIp == -1) {
     tError("%s, failed to resolve FQDN:%s", pRpc->label, peerFqdn); 
+    terrno = TSDB_CODE_APP_ERROR; 
     return NULL;
   }
 
@@ -507,11 +508,7 @@ static SRpcConn *rpcOpenConn(SRpcInfo *pRpc, char *peerFqdn, uint16_t peerPort,
     if (taosOpenConn[connType]) {
       void *shandle = (connType & RPC_CONN_TCP)? pRpc->tcphandle:pRpc->udphandle;
       pConn->chandle = (*taosOpenConn[connType])(shandle, pConn, pConn->peerIp, pConn->peerPort);
-      if (pConn->chandle) {
-        tTrace("%s %p, rpc connection is set up, sid:%d id:%s %s:%hu connType:%d", pRpc->label, 
-                pConn, pConn->sid, pRpc->user, peerFqdn, pConn->peerPort, pConn->connType);
-      } else {
-        tError("%s %p, failed to set up connection to %s:%hu", pRpc->label, pConn, peerFqdn, pConn->peerPort);
+      if (pConn->chandle == NULL) {
         terrno = TSDB_CODE_NETWORK_UNAVAIL;
         rpcCloseConn(pConn);
         pConn = NULL;
@@ -558,7 +555,7 @@ static void rpcCloseConn(void *thandle) {
   taosFreeId(pRpc->idPool, pConn->sid);
   pConn->pContext = NULL;
 
-  tTrace("%s %p, rpc connection is closed", pRpc->label, pConn);
+  tTrace("%s, rpc connection is closed", pConn->info);
 
   rpcUnlockConn(pConn);
 }
@@ -620,7 +617,6 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
       }
 
       if (terrno != 0) {
-        tWarn("%s %p, user not there or server not ready", pRpc->label, pConn);
         taosFreeId(pRpc->idPool, sid);   // sid shall be released
         pConn = NULL;
       }
@@ -635,8 +631,6 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
     }
   
     taosHashPut(pRpc->hash, hashstr, size, (char *)&pConn, POINTER_BYTES);
-    tTrace("%s %p, rpc connection is allocated, sid:%d id:%s port:%u", 
-           pRpc->label, pConn, sid, pConn->user, pConn->localPort);
   }
 
   return pConn;
@@ -661,7 +655,6 @@ static SRpcConn *rpcGetConnObj(SRpcInfo *pRpc, int sid, SRecvInfo *pRecv) {
 
   if (pConn) {
     if (pConn->linkUid != pHead->linkUid) {
-      tTrace("%s %p, linkUid:0x%x not matched, received:0x%x", pRpc->label, pConn, pConn->linkUid, pHead->linkUid);
       terrno = TSDB_CODE_MISMATCHED_METER_ID;
       pConn = NULL;
     }
@@ -678,21 +671,25 @@ static SRpcConn *rpcSetupConnToServer(SRpcReqContext *pContext) {
   pConn = rpcGetConnFromCache(pRpc->pCache, pIpSet->fqdn[pIpSet->inUse], pIpSet->port[pIpSet->inUse], pContext->connType);
   if ( pConn == NULL || pConn->user[0] == 0) {
     pConn = rpcOpenConn(pRpc, pIpSet->fqdn[pIpSet->inUse], pIpSet->port[pIpSet->inUse], pContext->connType);
+  } 
+
+  if (pConn) {
+    pConn->ahandle = pContext->ahandle;
+    sprintf(pConn->info, "%s %p %p", pRpc->label, pConn, pConn->ahandle);
   } else {
-    tTrace("%s %p, connection is retrieved from cache", pRpc->label, pConn);
+    tError("%s %p, failed to set up connection(%s)", pRpc->label, pContext->ahandle, tstrerror(terrno));
   }
 
   return pConn;
 }
 
 static int rpcProcessReqHead(SRpcConn *pConn, SRpcHead *pHead) {
-    SRpcInfo *pRpc= pConn->pRpc;
 
     if (pConn->peerId == 0) {
       pConn->peerId = pHead->sourceId;
     } else {
       if (pConn->peerId != pHead->sourceId) {
-        tTrace("%s %p, source Id is changed, old:0x%08x new:0x%08x", pRpc->label, pConn, 
+        tTrace("%s, source Id is changed, old:0x%08x new:0x%08x", pConn->info, 
                pConn->peerId, pHead->sourceId);
         return TSDB_CODE_INVALID_VALUE;
       }
@@ -701,17 +698,16 @@ static int rpcProcessReqHead(SRpcConn *pConn, SRpcHead *pHead) {
     if (pConn->inTranId == pHead->tranId) {
       if (pConn->inType == pHead->msgType) {
         if (pHead->code == 0) {
-          tTrace("%s %p, %s is retransmitted", pRpc->label, pConn, taosMsg[pHead->msgType]);
+          tTrace("%s, %s is retransmitted", pConn->info, taosMsg[pHead->msgType]);
           rpcSendQuickRsp(pConn, TSDB_CODE_ACTION_IN_PROGRESS);
         } else {
           // do nothing, it is heart beat from client
         }
       } else if (pConn->inType == 0) {
-        tTrace("%s %p, %s is already processed, tranId:%d", pRpc->label, pConn, 
-                taosMsg[pHead->msgType], pConn->inTranId);
+        tTrace("%s, %s is already processed, tranId:%d", pConn->info, taosMsg[pHead->msgType], pConn->inTranId);
         rpcSendMsgToPeer(pConn, pConn->pRspMsg, pConn->rspMsgLen); // resend the response
       } else {
-        tTrace("%s %p, mismatched message %s and tranId", pRpc->label, pConn, taosMsg[pHead->msgType]);
+        tTrace("%s, mismatched message %s and tranId", pConn->info, taosMsg[pHead->msgType]);
       }
 
       // do not reply any message
@@ -719,7 +715,7 @@ static int rpcProcessReqHead(SRpcConn *pConn, SRpcHead *pHead) {
     }
 
     if (pConn->inType != 0) {
-      tTrace("%s %p, last session is not finished, inTranId:%d tranId:%d", pRpc->label, pConn, 
+      tTrace("%s, last session is not finished, inTranId:%d tranId:%d", pConn->info, 
               pConn->inTranId, pHead->tranId);
       return TSDB_CODE_LAST_SESSION_NOT_FINISHED;
     }
@@ -751,7 +747,7 @@ static int rpcProcessRspHead(SRpcConn *pConn, SRpcHead *pHead) {
 
   if (pHead->code == TSDB_CODE_ACTION_IN_PROGRESS) {
     if (pConn->tretry <= tsRpcMaxRetry) {
-      tTrace("%s %p, peer is still processing the transaction", pRpc->label, pConn);
+      tTrace("%s, peer is still processing the transaction", pConn->info);
       pConn->tretry++;
       rpcSendReqHead(pConn);
       taosTmrReset(rpcProcessRetryTimer, tsRpcTimer, pConn, pRpc->tmrCtrl, &pConn->pTimer);
@@ -790,7 +786,15 @@ static SRpcConn *rpcProcessMsgHead(SRpcInfo *pRpc, SRecvInfo *pRecv) {
   }
 
   pConn = rpcGetConnObj(pRpc, sid, pRecv);
-  if (pConn == NULL) return NULL;
+  if (pConn == NULL) {
+    tError("%s %p, failed to get connection obj(%s)", pRpc->label, pHead->ahandle, tstrerror(terrno)); 
+    return NULL;
+  } else {
+    if (rpcIsReq(pHead->msgType)) {
+      pConn->ahandle = (void *)pHead->ahandle;
+      sprintf(pConn->info, "%s %p %p", pRpc->label, pConn, pConn->ahandle);
+    }
+  }
 
   rpcLockConn(pConn);
   sid = pConn->sid;
@@ -827,7 +831,7 @@ static SRpcConn *rpcProcessMsgHead(SRpcInfo *pRpc, SRecvInfo *pRecv) {
 static void rpcProcessBrokenLink(SRpcConn *pConn) {
   SRpcInfo *pRpc = pConn->pRpc;
   
-  tTrace("%s %p, link is broken", pRpc->label, pConn);
+  tTrace("%s, link is broken", pConn->info);
   // pConn->chandle = NULL;
 
   if (pConn->outType) {
@@ -838,7 +842,7 @@ static void rpcProcessBrokenLink(SRpcConn *pConn) {
 
   if (pConn->inType) {
     // if there are pending request, notify the app
-    tTrace("%s %p, connection is gone, notify the app", pRpc->label, pConn);
+    tTrace("%s, connection is gone, notify the app", pConn->info);
 /*
     SRpcMsg rpcMsg;
     rpcMsg.pCont = NULL;
@@ -873,17 +877,17 @@ static void *rpcProcessMsgFromPeer(SRecvInfo *pRecv) {
   pConn = rpcProcessMsgHead(pRpc, pRecv);
 
   if (pHead->msgType < TSDB_MSG_TYPE_CM_HEARTBEAT || (rpcDebugFlag & 16)) {
-    tTrace("%s %p, %s received from 0x%x:%hu, parse code:0x%x len:%d sig:0x%08x:0x%08x:%d code:0x%x",
-        pRpc->label, pConn, taosMsg[pHead->msgType], pRecv->ip, pRecv->port, terrno, 
+    tTrace("%s %p %p, %s received from 0x%x:%hu, parse code:0x%x len:%d sig:0x%08x:0x%08x:%d code:0x%x",
+        pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType], pRecv->ip, pRecv->port, terrno, 
         pRecv->msgLen, pHead->sourceId, pHead->destId, pHead->tranId, pHead->code);
   }
 
   int32_t code = terrno;
   if (code != TSDB_CODE_ALREADY_PROCESSED) {
     if (code != 0) { // parsing error
-      if ( rpcIsReq(pHead->msgType) ) {
+      if (rpcIsReq(pHead->msgType)) {
         rpcSendErrorMsgToPeer(pRecv, code);
-        tTrace("%s %p, %s is sent with error code:%x", pRpc->label, pConn, taosMsg[pHead->msgType+1], code);
+        tTrace("%s %p %p, %s is sent with error code:%x", pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType+1], code);
       } 
     } else { // parsing OK
       rpcProcessIncomingMsg(pConn, pHead);
@@ -925,6 +929,7 @@ static void rpcProcessIncomingMsg(SRpcConn *pConn, SRpcHead *pHead) {
   rpcMsg.pCont = pHead->content;
   rpcMsg.msgType = pHead->msgType;
   rpcMsg.code = pHead->code; 
+  rpcMsg.ahandle = pConn->ahandle;
    
   if ( rpcIsReq(pHead->msgType) ) {
     rpcMsg.handle = pConn;
@@ -949,14 +954,14 @@ static void rpcProcessIncomingMsg(SRpcConn *pConn, SRpcHead *pHead) {
       pContext->redirect++;
       if (pContext->redirect > TSDB_MAX_REPLICA) {
         pHead->code = TSDB_CODE_NETWORK_UNAVAIL; 
-        tWarn("%s %p, too many redirects, quit", pRpc->label, pConn);
+        tWarn("%s, too many redirects, quit", pConn->info);
       }
     }
 
     if (pHead->code == TSDB_CODE_REDIRECT) {
       pContext->numOfTry = 0;
       memcpy(&pContext->ipSet, pHead->content, sizeof(pContext->ipSet));
-      tTrace("%s %p, redirect is received, numOfIps:%d", pRpc->label, pConn, pContext->ipSet.numOfIps);
+      tTrace("%s, redirect is received, numOfIps:%d", pConn->info, pContext->ipSet.numOfIps);
       for (int i=0; i<pContext->ipSet.numOfIps; ++i) 
         pContext->ipSet.port[i] = htons(pContext->ipSet.port[i]);
       rpcSendReqToServer(pRpc, pContext);
@@ -1062,6 +1067,7 @@ static void rpcSendReqToServer(SRpcInfo *pRpc, SRpcReqContext *pContext) {
     return;
   }
 
+  pConn->ahandle = pContext->ahandle;
   rpcLockConn(pConn);
 
   // set the message header  
@@ -1075,6 +1081,7 @@ static void rpcSendReqToServer(SRpcInfo *pRpc, SRpcReqContext *pContext) {
   pHead->destId = pConn->peerId;
   pHead->port = 0;
   pHead->linkUid = pConn->linkUid;
+  pHead->ahandle = (uint64_t)pConn->ahandle;
   if (!pConn->secured) memcpy(pHead->user, pConn->user, tListLen(pHead->user));
 
   // set the connection parameters
@@ -1092,30 +1099,28 @@ static void rpcSendReqToServer(SRpcInfo *pRpc, SRpcReqContext *pContext) {
 
 static void rpcSendMsgToPeer(SRpcConn *pConn, void *msg, int msgLen) {
   int        writtenLen = 0;
-  SRpcInfo  *pRpc = pConn->pRpc;
   SRpcHead  *pHead = (SRpcHead *)msg;
 
   msgLen = rpcAddAuthPart(pConn, msg, msgLen);
 
   if ( rpcIsReq(pHead->msgType)) {
     if (pHead->msgType < TSDB_MSG_TYPE_CM_HEARTBEAT || (rpcDebugFlag & 16))
-      tTrace("%s %p, %s is sent to %s:%hu, len:%d sig:0x%08x:0x%08x:%d",
-             pRpc->label, pConn, taosMsg[pHead->msgType], pConn->peerFqdn,
-             pConn->peerPort, msgLen, pHead->sourceId, pHead->destId, pHead->tranId);
+      tTrace("%s, %s is sent to %s:%hu, len:%d sig:0x%08x:0x%08x:%d",
+             pConn->info, taosMsg[pHead->msgType], pConn->peerFqdn, pConn->peerPort, 
+             msgLen, pHead->sourceId, pHead->destId, pHead->tranId);
   } else {
     if (pHead->code == 0) pConn->secured = 1; // for success response, set link as secured
     if (pHead->msgType < TSDB_MSG_TYPE_CM_HEARTBEAT || (rpcDebugFlag & 16))
-      tTrace( "%s %p, %s is sent to 0x%x:%hu, code:0x%x len:%d sig:0x%08x:0x%08x:%d",
-          pRpc->label, pConn, taosMsg[pHead->msgType], pConn->peerIp, pConn->peerPort, 
+      tTrace("%s, %s is sent to 0x%x:%hu, code:0x%x len:%d sig:0x%08x:0x%08x:%d",
+          pConn->info, taosMsg[pHead->msgType], pConn->peerIp, pConn->peerPort, 
           htonl(pHead->code), msgLen, pHead->sourceId, pHead->destId, pHead->tranId);
   }
 
-  tTrace("connection type is: %d", pConn->connType);
+  //tTrace("connection type is: %d", pConn->connType);
   writtenLen = (*taosSendData[pConn->connType])(pConn->peerIp, pConn->peerPort, pHead, msgLen, pConn->chandle);
 
   if (writtenLen != msgLen) {
-    tError("%s %p, failed to send, dataLen:%d writtenLen:%d, reason:%s", pRpc->label, pConn, 
-           msgLen, writtenLen, strerror(errno));
+    tError("%s, failed to send, msgLen:%d written:%d, reason:%s", pConn->info, msgLen, writtenLen, strerror(errno));
   }
  
   tDump(msg, msgLen);
@@ -1130,7 +1135,7 @@ static void rpcProcessConnError(void *param, void *id) {
     return;
   }
   
-  tTrace("%s connection error happens", pRpc->label);
+  tTrace("%s %p, connection error happens", pRpc->label, pContext->ahandle);
 
   if (pContext->numOfTry >= pContext->ipSet.numOfIps) {
     rpcMsg.msgType = pContext->msgType+1;
@@ -1156,23 +1161,21 @@ static void rpcProcessRetryTimer(void *param, void *tmrId) {
   rpcLockConn(pConn);
 
   if (pConn->outType && pConn->user[0]) {
-    tTrace("%s %p, expected %s is not received", pRpc->label, pConn, taosMsg[(int)pConn->outType + 1]);
+    tTrace("%s, expected %s is not received", pConn->info, taosMsg[(int)pConn->outType + 1]);
     pConn->pTimer = NULL;
     pConn->retry++;
 
     if (pConn->retry < 4) {
-      tTrace("%s %p, re-send msg:%s to %s:%hu", pRpc->label, pConn, 
-             taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
+      tTrace("%s, re-send msg:%s to %s:%hu", pConn->info, taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
       rpcSendMsgToPeer(pConn, pConn->pReqMsg, pConn->reqMsgLen);      
       taosTmrReset(rpcProcessRetryTimer, tsRpcTimer, pConn, pRpc->tmrCtrl, &pConn->pTimer);
     } else {
       // close the connection
-      tTrace("%s %p, failed to send msg:%s to %s:%hu", pRpc->label, pConn,
-              taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
+      tTrace("%s, failed to send msg:%s to %s:%hu", pConn->info, taosMsg[pConn->outType], pConn->peerFqdn, pConn->peerPort);
       reportDisc = 1;
     }
   } else {
-    tTrace("%s %p, retry timer not processed", pRpc->label, pConn);
+    tTrace("%s, retry timer not processed", pConn->info);
   }
 
   rpcUnlockConn(pConn);
@@ -1189,10 +1192,10 @@ static void rpcProcessIdleTimer(void *param, void *tmrId) {
   SRpcInfo *pRpc = pConn->pRpc;
 
   if (pConn->user[0]) {
-    tTrace("%s %p, close the connection since no activity", pRpc->label, pConn);
+    tTrace("%s, close the connection since no activity", pConn->info);
     if (pConn->inType && pRpc->cfp) {
       // if there are pending request, notify the app
-      tTrace("%s %p, notify the app, connection is gone", pRpc->label, pConn);
+      tTrace("%s, notify the app, connection is gone", pConn->info);
 /*
       SRpcMsg rpcMsg;
       rpcMsg.pCont = NULL;
@@ -1205,7 +1208,7 @@ static void rpcProcessIdleTimer(void *param, void *tmrId) {
     }
     rpcCloseConn(pConn);
   } else {
-    tTrace("%s %p, idle timer:%p not processed", pRpc->label, pConn, tmrId);
+    tTrace("%s, idle timer:%p not processed", pConn->info, tmrId);
   }
 }
 
@@ -1216,11 +1219,11 @@ static void rpcProcessProgressTimer(void *param, void *tmrId) {
   rpcLockConn(pConn);
 
   if (pConn->inType && pConn->user[0]) {
-    tTrace("%s %p, progress timer expired, send progress", pRpc->label, pConn);
+    tTrace("%s, progress timer expired, send progress", pConn->info);
     rpcSendQuickRsp(pConn, TSDB_CODE_ACTION_IN_PROGRESS);
     taosTmrReset(rpcProcessProgressTimer, tsRpcTimer/2, pConn, pRpc->tmrCtrl, &pConn->pTimer);
   } else {
-    tTrace("%s %p, progress timer:%p not processed", pRpc->label, pConn, tmrId);
+    tTrace("%s, progress timer:%p not processed", pConn->info, tmrId);
   }
 
   rpcUnlockConn(pConn);
@@ -1254,7 +1257,7 @@ static int32_t rpcCompressRpcMsg(char* pCont, int32_t contLen) {
     memcpy(pCont + overhead, buf, compLen);
     
     pHead->comp = 1;
-    tTrace("compress rpc msg, before:%d, after:%d", contLen, compLen);
+    //tTrace("compress rpc msg, before:%d, after:%d", contLen, compLen);
     finalLen = compLen + overhead;
   } else {
     finalLen = contLen;
@@ -1288,7 +1291,7 @@ static SRpcHead *rpcDecompressRpcMsg(SRpcHead *pHead) {
       pNewHead->msgLen = rpcMsgLenFromCont(origLen);
       rpcFreeMsg(pHead); // free the compressed message buffer
       pHead = pNewHead; 
-      tTrace("decompress rpc msg, compLen:%d, after:%d", compLen, contLen);
+      //tTrace("decompress rpc msg, compLen:%d, after:%d", compLen, contLen);
     } else {
       tError("failed to allocate memory to decompress msg, contLen:%d", contLen);
     }
@@ -1345,7 +1348,6 @@ static int rpcAddAuthPart(SRpcConn *pConn, char *msg, int msgLen) {
 
 static int rpcCheckAuthentication(SRpcConn *pConn, char *msg, int msgLen) {
   SRpcHead *pHead = (SRpcHead *)msg;
-  SRpcInfo *pRpc = pConn->pRpc;
   int       code = 0;
 
   if ((pConn->secured && pHead->spi == 0) || (pHead->spi == 0 && pConn->spi == 0)){
@@ -1373,20 +1375,20 @@ static int rpcCheckAuthentication(SRpcConn *pConn, char *msg, int msgLen) {
     delta = (int32_t)htonl(pDigest->timeStamp);
     delta -= (int32_t)taosGetTimestampSec();
     if (abs(delta) > 900) {
-      tWarn("%s %p, time diff:%d is too big, msg discarded", pRpc->label, pConn, delta);
+      tWarn("%s, time diff:%d is too big, msg discarded", pConn->info, delta);
       code = TSDB_CODE_INVALID_TIME_STAMP;
     } else {
       if (rpcAuthenticateMsg(pHead, msgLen-TSDB_AUTH_LEN, pDigest->auth, pConn->secret) < 0) {
-        tError("%s %p, authentication failed, msg discarded", pRpc->label, pConn);
+        tError("%s, authentication failed, msg discarded", pConn->info);
         code = TSDB_CODE_AUTH_FAILURE;
       } else {
         pHead->msgLen = (int32_t)htonl((uint32_t)pHead->msgLen) - sizeof(SRpcDigest);
         if ( !rpcIsReq(pHead->msgType) ) pConn->secured = 1;  // link is secured for client
-        tTrace("%s %p, message is authenticated", pRpc->label, pConn);
+        //tTrace("%s, message is authenticated", pConn->info);
       }
     }
   } else {
-    tTrace("%s %p, auth spi:%d not matched with received:%d", pRpc->label, pConn, pConn->spi, pHead->spi);
+    tError("%s, auth spi:%d not matched with received:%d", pConn->info, pConn->spi, pHead->spi);
     code = TSDB_CODE_AUTH_FAILURE;
   }
 
diff --git a/src/rpc/src/rpcUdp.c b/src/rpc/src/rpcUdp.c
index c551f6b1db1acfe847ce51ef70b1f883ed66cb05..677187e3b999c3e55301eea3efc3bf5b8a19395e 100644
--- a/src/rpc/src/rpcUdp.c
+++ b/src/rpc/src/rpcUdp.c
@@ -218,7 +218,7 @@ static void *taosRecvUdpData(void *param) {
   while (1) {
     dataLen = recvfrom(pConn->fd, pConn->buffer, RPC_MAX_UDP_SIZE, 0, (struct sockaddr *)&sourceAdd, &addLen);
     port = ntohs(sourceAdd.sin_port);
-    tTrace("%s msg is recv from 0x%x:%hu len:%d", pConn->label, sourceAdd.sin_addr.s_addr, port, dataLen);
+    //tTrace("%s msg is recv from 0x%x:%hu len:%d", pConn->label, sourceAdd.sin_addr.s_addr, port, dataLen);
 
     if (dataLen < sizeof(SRpcHead)) {
       tError("%s recvfrom failed, reason:%s\n", pConn->label, strerror(errno));
diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 0a1444c2f0d6c74283788515445bf31567a71655..c5a6ed54c3ed4678d9a4a7a9476560720cf79691 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -214,12 +214,12 @@ typedef struct {
   int64_t tombSize;  // unused file size
   int32_t totalBlocks;
   int32_t totalSubBlocks;
-} SFileInfo;
+} STsdbFileInfo;
 
 typedef struct {
   int       fd;
   char      fname[128];
-  SFileInfo info;
+  STsdbFileInfo info;
 } SFile;
 
 #define TSDB_IS_FILE_OPENED(f) ((f)->fd != -1)
@@ -350,7 +350,7 @@ SFileGroup *tsdbSearchFGroup(STsdbFileH *pFileH, int fid);
 void tsdbGetKeyRangeOfFileId(int32_t daysPerFile, int8_t precision, int32_t fileId, TSKEY *minKey, TSKEY *maxKey);
 
 // TSDB repository definition
-typedef struct _tsdb_repo {
+typedef struct STsdbRepo {
   char *rootDir;
   // TSDB configuration
   STsdbCfg config;
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index ec772fd4d1f1468147a47f9cc728532d75e18298..8634a523f3d5b2a1a8a49180acd5a7dab3785cfb 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -12,6 +12,7 @@ python3 ./test.py $1 -f insert/binary.py
 python3 ./test.py $1 -f insert/nchar.py
 python3 ./test.py $1 -f insert/nchar-boundary.py
 python3 ./test.py $1 -f insert/nchar-unicode.py
+python3 ./test.py $1 -f insert/multi.py
 
 python3 ./test.py $1 -f table/column_name.py
 python3 ./test.py $1 -f table/column_num.py
diff --git a/tests/pytest/insert/bool.py b/tests/pytest/insert/bool.py
index 062563f4ab84c9e09ea3ed08ced60fac53b1add8..c175afd8b556f0a9e82c23c4a6d62eacf45a0f70 100644
--- a/tests/pytest/insert/bool.py
+++ b/tests/pytest/insert/bool.py
@@ -58,6 +58,14 @@ class TDTestCase:
         tdSql.query('select * from tb order by ts desc')
         tdLog.info('tdSql.checkRow(6)')
         tdSql.checkRows(6)
+        tdLog.info('=============== step7')
+        tdLog.info("insert into tb values (now+6m, true)")
+        tdSql.execute("insert into tb values (now+5m, true)")
+        tdLog.info('select * from tb order by ts desc')
+        tdSql.query('select * from tb order by ts desc')
+        tdLog.info('tdSql.checkRow(7)')
+        tdSql.checkRows(7)
+# convert end
 # convert end
 
     def stop(self):
diff --git a/tests/pytest/smoketest.sh b/tests/pytest/smoketest.sh
index c0878354e032707f85596abae078ef7080035dae..6314b3f83bce23ee2f513271e768ae7b6c6668f1 100755
--- a/tests/pytest/smoketest.sh
+++ b/tests/pytest/smoketest.sh
@@ -21,6 +21,8 @@ python3 ./test.py $1 -f insert/date.py
 python3 ./test.py $1 -s && sleep 1
 python3 ./test.py $1 -f insert/nchar.py
 python3 ./test.py $1 -s && sleep 1
+python3 ./test.py $1 -f insert/multi.py
+python3 ./test.py $1 -s && sleep 1
 
 python3 ./test.py $1 -f table/column_name.py
 python3 ./test.py $1 -s && sleep 1
diff --git a/tests/pytest/table/tablename-boundary.py b/tests/pytest/table/tablename-boundary.py
new file mode 100644
index 0000000000000000000000000000000000000000..335073065c5a5b6af82469c967bac1df623d5e5a
--- /dev/null
+++ b/tests/pytest/table/tablename-boundary.py
@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+
+import sys
+import string
+import random
+import subprocess
+from util.log import *
+from util.cases import *
+from util.sql import *
+
+
+class TDTestCase:
+    def init(self, conn):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+    def run(self):
+        tdSql.prepare()
+
+        getTableNameLen = "grep -w '#define TSDB_TABLE_NAME_LEN' ../../src/inc/taosdef.h|awk '{print $3}'"
+        tableNameMaxLen = int(
+            subprocess.check_output(
+                getTableNameLen, shell=True))
+        tdLog.info("table name max length is %d" % tableNameMaxLen)
+        chars = string.ascii_uppercase + string.ascii_lowercase
+        tb_name = ''.join(random.choices(chars, k=tableNameMaxLen))
+        tdLog.info('tb_name length %d' % len(tb_name))
+        tdLog.info('create table %s (ts timestamp, value int)' % tb_name)
+        tdSql.error(
+            'create table %s (ts timestamp, speed binary(4089))' %
+            tb_name)
+
+        tb_name = ''.join(random.choices(chars, k=191))
+        tdLog.info('tb_name length %d' % len(tb_name))
+        tdLog.info('create table %s (ts timestamp, value int)' % tb_name)
+        tdSql.execute(
+            'create table %s (ts timestamp, speed binary(4089))' %
+            tb_name)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/util/dnodes.py b/tests/pytest/util/dnodes.py
index 9f7466a7e7b6c75cbafc274c131cff4e0e571b04..727016adb320e917c4d68b3ed1486577e423b1f9 100644
--- a/tests/pytest/util/dnodes.py
+++ b/tests/pytest/util/dnodes.py
@@ -223,8 +223,8 @@ class TDDnode:
         self.running = 1
         tdLog.debug("dnode:%d is running with %s " % (self.index, cmd))
 
-        tdLog.debug("wait 4 seconds for the dnode:%d to start." % (self.index))
-        time.sleep(4)
+        tdLog.debug("wait 5 seconds for the dnode:%d to start." % (self.index))
+        time.sleep(5)
 
     def stop(self):
         if self.valgrind == 0:
@@ -233,16 +233,14 @@ class TDDnode:
             toBeKilled = "valgrind.bin"
 
         if self.running != 0:
-            killCmd = "ps -ef|grep -w %s| grep '%s' | grep -v grep | awk '{print $2}' | xargs kill -INT" % (
-                toBeKilled, self.cfgDir)
-
             psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             while(processID):
+                killCmd = "kill -INT %s" % processID
                 os.system(killCmd)
                 time.sleep(1)
-                processID = subprocess.check_output(psCmd, shell=True)
+                processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             self.running = 0
             tdLog.debug("dnode:%d is stopped by kill -INT" % (self.index))
@@ -254,15 +252,14 @@ class TDDnode:
             toBeKilled = "valgrind.bin"
 
         if self.running != 0:
-            killCmd = "ps -ef|grep -w %s| grep '%s' | grep -v grep | awk '{print $2}' | xargs kill -KILL" % (
-                toBeKilled, self.cfgDir)
             psCmd = "ps -ef|grep -w %s| grep -v grep | awk '{print $2}'" % toBeKilled
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             while(processID):
+                killCmd = "kill -KILL %s" % processID
                 os.system(killCmd)
                 time.sleep(1)
-                processID = subprocess.check_output(psCmd, shell=True)
+                processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
             self.running = 0
             tdLog.debug("dnode:%d is stopped by kill -KILL" % (self.index))
@@ -307,21 +304,21 @@ class TDDnodes:
         self.dnodes.append(TDDnode(10))
 
     def init(self, path):
-        killCmd = "ps -ef|grep -w taosd | grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
-        killCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
         binPath = os.path.dirname(os.path.realpath(__file__))
         binPath = binPath + "/../../../debug/"
@@ -407,27 +404,27 @@ class TDDnodes:
             self.dnodes[i].stop()
 
         psCmd = "ps -ef | grep -w taosd | grep 'root' | grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         if processID:
             cmd = "sudo systemctl stop taosd"
             os.system(cmd)
         # if os.system(cmd) != 0 :
         # tdLog.exit(cmd)
-        killCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w taosd| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
-        killCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}' | xargs kill -KILL"
         psCmd = "ps -ef|grep -w valgrind.bin| grep -v grep | awk '{print $2}'"
-        processID = subprocess.check_output(psCmd, shell=True)
+        processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
         while(processID):
+            killCmd = "kill -KILL %s" % processID
             os.system(killCmd)
             time.sleep(1)
-            processID = subprocess.check_output(psCmd, shell=True)
+            processID = subprocess.check_output(psCmd, shell=True).decode("utf-8")
 
         # if os.system(cmd) != 0 :
         # tdLog.exit(cmd)
diff --git a/tests/pytest/valgrind-test.sh b/tests/pytest/valgrind-test.sh
index 77c2b321df1988eab3cafe9483a660c84cd9ac93..0b5dfc0fa3dbb00d4c7a4e276ea63d7944d92f6d 100755
--- a/tests/pytest/valgrind-test.sh
+++ b/tests/pytest/valgrind-test.sh
@@ -1,33 +1,35 @@
 #!/bin/bash
-python3 ./test.py $1 -f insert/basic.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/int.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/float.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/bigint.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/bool.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/double.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/smallint.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/tinyint.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/binary.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/date.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f insert/nchar.py
-python3 ./test.py $1 -s && sleep 1
+python3 ./test.py -g -f insert/basic.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/int.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/float.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/bigint.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/bool.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/double.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/smallint.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/tinyint.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/binary.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/date.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/nchar.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f insert/multi.py
+python3 ./test.py -g -s && sleep 1
 
-python3 ./test.py $1 -f table/column_name.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f table/column_num.py
-python3 ./test.py $1 -s && sleep 1
-python3 ./test.py $1 -f table/db_table.py
-python3 ./test.py $1 -s && sleep 1
+python3 ./test.py -g -f table/column_name.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f table/column_num.py
+python3 ./test.py -g -s && sleep 1
+python3 ./test.py -g -f table/db_table.py
+python3 ./test.py -g -s && sleep 1
 
-python3 ./test.py $1 -f import_merge/importDataLastSub.py
-python3 ./test.py $1 -s && sleep 1
+python3 ./test.py -g -f import_merge/importDataLastSub.py
+python3 ./test.py -g -s && sleep 1