diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7443f1a9110e68d57f85f6241a76bb9f7f473aea..5a9a42cc3627d18af7fd48064b35f5abd6b15601 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,8 @@ PROJECT(TDengine)
 
 SET(TD_CLUSTER FALSE)
 SET(TD_ACCOUNT FALSE)
+SET(TD_VPEER FALSE)
+SET(TD_MPEER FALSE)
 SET(TD_GRANT FALSE)
 SET(TD_COVER FALSE)
 SET(TD_PAGMODE_LITE FALSE)
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index a2af7ea16b21263b561f00d2bb6fd7bc8ccfcca2..327120e0ed937034db4bd4ce63ee11c8904ba6c7 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1835,7 +1835,7 @@ int tscProcessTableMetaRsp(SSqlObj *pSql) {
   }
 
   for (int i = 0; i < TSDB_VNODES_SUPPORT; ++i) {
-    pMetaMsg->vpeerDesc[i].vnode = htonl(pMetaMsg->vpeerDesc[i].vnode);
+    pMetaMsg->vpeerDesc[i].vgId = htonl(pMetaMsg->vpeerDesc[i].vgId);
   }
 
   SSchema* pSchema = pMetaMsg->schema;
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index b93ec0b6d381520c8d693f78f72f39685e13d329..d616a8bffa402ed8f2bcab6d8fa392c5de9c950c 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -1454,7 +1454,7 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
       SSqlObj *pNew = tscCreateSqlObjForSubquery(pParentSql, trsupport, pSql);
       if (pNew == NULL) {
         tscError("%p sub:%p failed to create new subquery due to out of memory, abort retry, vid:%d, orderOfSub:%d",
-                 trsupport->pParentSqlObj, pSql, pSvd != NULL ? pSvd->vnode : -1, trsupport->subqueryIndex);
+                 trsupport->pParentSqlObj, pSql, pSvd != NULL ? pSvd->vgId : -1, trsupport->subqueryIndex);
         
         pState->code = -TSDB_CODE_CLI_OUT_OF_MEMORY;
         trsupport->numOfRetry = MAX_NUM_OF_SUBQUERY_RETRY;
@@ -1470,7 +1470,7 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
   if (pState->code != TSDB_CODE_SUCCESS) {  // failed, abort
     if (vnodeInfo != NULL) {
       tscTrace("%p sub:%p query failed,ip:%u,vid:%d,orderOfSub:%d,global code:%d", pParentSql, pSql,
-               vnodeInfo->vpeerDesc[vnodeInfo->index].ip, vnodeInfo->vpeerDesc[vnodeInfo->index].vnode,
+               vnodeInfo->vpeerDesc[vnodeInfo->index].ip, vnodeInfo->vpeerDesc[vnodeInfo->index].vgId,
                trsupport->subqueryIndex, pState->code);
     } else {
       tscTrace("%p sub:%p query failed,orderOfSub:%d,global code:%d", pParentSql, pSql,
@@ -1481,7 +1481,7 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
   } else {  // success, proceed to retrieve data from dnode
     if (vnodeInfo != NULL) {
       tscTrace("%p sub:%p query complete,ip:%u,vid:%d,orderOfSub:%d,retrieve data", trsupport->pParentSqlObj, pSql,
-               vnodeInfo->vpeerDesc[vnodeInfo->index].ip, vnodeInfo->vpeerDesc[vnodeInfo->index].vnode,
+               vnodeInfo->vpeerDesc[vnodeInfo->index].ip, vnodeInfo->vpeerDesc[vnodeInfo->index].vgId,
                trsupport->subqueryIndex);
     } else {
       tscTrace("%p sub:%p query complete, orderOfSub:%d,retrieve data", trsupport->pParentSqlObj, pSql,
diff --git a/src/dnode/CMakeLists.txt b/src/dnode/CMakeLists.txt
index 8a70107629e54b14a41e511cf332ea8eea107916..4bd89e238e7d1e08d9a0f4b223b72f5ed1dee369 100644
--- a/src/dnode/CMakeLists.txt
+++ b/src/dnode/CMakeLists.txt
@@ -26,6 +26,10 @@ IF ((TD_LINUX_64) OR (TD_LINUX_32 AND TD_ARM))
   IF (TD_CLUSTER)
     TARGET_LINK_LIBRARIES(taosd cluster)
   ENDIF ()
+  
+  IF (TD_VPEER)
+    TARGET_LINK_LIBRARIES(taosd balance)
+  ENDIF ()
 
   SET(PREPARE_ENV_CMD "prepare_env_cmd")
   SET(PREPARE_ENV_TARGET "prepare_env_target")
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 36f3a0e6127c4b288fb19bd7c88d9c1c0925438c..e2de9bf5860b7e6d4f759c868eefb51a71018b5a 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -32,6 +32,7 @@
 
 static int32_t dnodeInitSystem();
 static int32_t dnodeInitStorage();
+extern void grantParseParameter();
 static void dnodeCleanupStorage();
 static void dnodeCleanUpSystem();
 static void dnodeSetRunStatus(SDnodeRunStatus status);
diff --git a/src/dnode/src/dnodeMgmt.c b/src/dnode/src/dnodeMgmt.c
index 8e523eaf46701981a5469acfc19135a3fc4013d4..5f1e7a7a9431f4e6a16b7f61981a42aa36042fcf 100644
--- a/src/dnode/src/dnodeMgmt.c
+++ b/src/dnode/src/dnodeMgmt.c
@@ -64,7 +64,7 @@ int32_t dnodeInitMgmt() {
     dError("failed to init dnode timer");
     return -1;
   }
-  
+
   int32_t code = dnodeOpenVnodes();
   if (code != TSDB_CODE_SUCCESS) {
     return -1;
@@ -104,7 +104,7 @@ void dnodeMgmt(SRpcMsg *pMsg) {
   rpcFreeCont(pMsg->pCont);
 }
 
-static int dnodeGetVnodeList(int32_t vnodeList[]) {
+static int32_t dnodeGetVnodeList(int32_t vnodeList[]) {
   DIR *dir = opendir(tsVnodeDir);
   if (dir == NULL) {
     return TSDB_CODE_NO_WRITE_ACCESS;
@@ -129,47 +129,59 @@ static int dnodeGetVnodeList(int32_t vnodeList[]) {
 }
 
 static int32_t dnodeOpenVnodes() {
-   char vnodeDir[TSDB_FILENAME_LEN * 3];
-   int  failed = 0;
+  char vnodeDir[TSDB_FILENAME_LEN * 3];
+  int32_t failed = 0;
 
-   int32_t *vnodeList = (int32_t *) malloc(sizeof(int32_t) * 10000);
-   int numOfVnodes = dnodeGetVnodeList(vnodeList);
-  
-   for (int i=0; i<numOfVnodes; ++i) {
-      snprintf(vnodeDir, TSDB_FILENAME_LEN * 3, "%s/vnode%d", tsVnodeDir, vnodeList[i]);
-      if (vnodeOpen(vnodeList[i], vnodeDir) <0) failed++;
-   }
+  int32_t *vnodeList = (int32_t *)malloc(sizeof(int32_t) * 10000);
+  int32_t  numOfVnodes = dnodeGetVnodeList(vnodeList);
+
+  for (int32_t i = 0; i < numOfVnodes; ++i) {
+    snprintf(vnodeDir, TSDB_FILENAME_LEN * 3, "%s/vnode%d", tsVnodeDir, vnodeList[i]);
+    if (vnodeOpen(vnodeList[i], vnodeDir) < 0) failed++;
+  }
 
-   free(vnodeList);
+  free(vnodeList);
 
-   dPrint("there are total vnodes:%d, failed to open:%d", numOfVnodes, failed);
-   return TSDB_CODE_SUCCESS;
+  dPrint("there are total vnodes:%d, failed to open:%d", numOfVnodes, failed);
+  return TSDB_CODE_SUCCESS;
 }
 
 static void dnodeCloseVnodes() {
-   int32_t *vnodeList = (int32_t *) malloc(sizeof(int32_t) * 10000);
-   int numOfVnodes = dnodeGetVnodeList(vnodeList);
-  
-   for (int i=0; i<numOfVnodes; ++i) 
-     vnodeClose(vnodeList[i]); 
+  int32_t *vnodeList = (int32_t *)malloc(sizeof(int32_t) * 10000);
+  int32_t  numOfVnodes = dnodeGetVnodeList(vnodeList);
 
-   free(vnodeList);
-   dPrint("total vnodes:%d are all closed", numOfVnodes);
+  for (int32_t i = 0; i < numOfVnodes; ++i) {
+    vnodeClose(vnodeList[i]);
+  }
+
+  free(vnodeList);
+  dPrint("total vnodes:%d are all closed", numOfVnodes);
 }
 
 static int32_t dnodeProcessCreateVnodeMsg(SRpcMsg *rpcMsg) {
-
   SMDCreateVnodeMsg *pCreate = rpcMsg->pCont;
-  pCreate->cfg.vgId        = htonl(pCreate->cfg.vgId);
-  pCreate->cfg.maxSessions = htonl(pCreate->cfg.maxSessions);
-  pCreate->cfg.daysPerFile = htonl(pCreate->cfg.daysPerFile);
-  pCreate->cfg.commitLog   = pCreate->cfg.commitLog;
-
+  pCreate->cfg.vgId            = htonl(pCreate->cfg.vgId);
+  pCreate->cfg.maxSessions     = htonl(pCreate->cfg.maxSessions);
+  pCreate->cfg.cacheBlockSize  = htonl(pCreate->cfg.cacheBlockSize);
+  pCreate->cfg.daysPerFile     = htonl(pCreate->cfg.daysPerFile);
+  pCreate->cfg.daysToKeep1     = htonl(pCreate->cfg.daysToKeep1);
+  pCreate->cfg.daysToKeep2     = htonl(pCreate->cfg.daysToKeep2);
+  pCreate->cfg.daysToKeep      = htonl(pCreate->cfg.daysToKeep);
+  pCreate->cfg.commitTime      = htonl(pCreate->cfg.commitTime);
+  pCreate->cfg.rowsInFileBlock = htonl(pCreate->cfg.rowsInFileBlock);
+  pCreate->cfg.blocksPerTable  = htons(pCreate->cfg.blocksPerTable);
+  pCreate->cfg.cacheNumOfBlocks.totalBlocks = htonl(pCreate->cfg.cacheNumOfBlocks.totalBlocks);
+  
+  for (int32_t j = 0; j < pCreate->cfg.replications; ++j) {
+    pCreate->vpeerDesc[j].vgId    = htonl(pCreate->vpeerDesc[j].vgId);
+    pCreate->vpeerDesc[j].dnodeId = htonl(pCreate->vpeerDesc[j].dnodeId);
+    pCreate->vpeerDesc[j].ip      = htonl(pCreate->vpeerDesc[j].ip);
+  }
+  
   return vnodeCreate(pCreate);
 }
 
 static int32_t dnodeProcessDropVnodeMsg(SRpcMsg *rpcMsg) {
-
   SMDDropVnodeMsg *pDrop = rpcMsg->pCont;
   pDrop->vgId = htonl(pDrop->vgId);
 
@@ -177,7 +189,6 @@ static int32_t dnodeProcessDropVnodeMsg(SRpcMsg *rpcMsg) {
 }
 
 static int32_t dnodeProcessAlterVnodeMsg(SRpcMsg *rpcMsg) {
-
   SMDCreateVnodeMsg *pCreate = rpcMsg->pCont;
   pCreate->cfg.vgId        = htonl(pCreate->cfg.vgId);
   pCreate->cfg.maxSessions = htonl(pCreate->cfg.maxSessions);
@@ -206,7 +217,7 @@ static int32_t dnodeProcessConfigDnodeMsg(SRpcMsg *pMsg) {
 
 static void dnodeSendStatusMsg(void *handle, void *tmrId) {
   if (tsDnodeTmr == NULL) {
-     dError("dnode timer is already released");
+    dError("dnode timer is already released");
     return;
   }
 
diff --git a/src/dnode/src/dnodeRead.c b/src/dnode/src/dnodeRead.c
index f71729c87a1c3a73cec1ae1df744c0046c73c6c3..31296e0201fbdf9a0fecb0e4cf5668926b2fd316 100644
--- a/src/dnode/src/dnodeRead.c
+++ b/src/dnode/src/dnodeRead.c
@@ -192,6 +192,7 @@ static void dnodeHandleIdleReadWorker() {
   }
 }
 
+UNUSED_FUNC
 static void dnodeProcessReadResult(void *pVnode, SReadMsg *pRead) {
   SRpcContext *pRpcContext = pRead->pRpcContext;
   int32_t      code = 0;
diff --git a/src/dnode/src/dnodeShell.c b/src/dnode/src/dnodeShell.c
index 951d43c34b88a2da659aa7429f37defb50837fb8..3681ef22c488a61825c97d6c6be29c079d9d3a73 100644
--- a/src/dnode/src/dnodeShell.c
+++ b/src/dnode/src/dnodeShell.c
@@ -37,7 +37,7 @@ int32_t dnodeInitShell() {
   dnodeProcessShellMsgFp[TSDB_MSG_TYPE_QUERY]    = dnodeRead;
   dnodeProcessShellMsgFp[TSDB_MSG_TYPE_RETRIEVE] = dnodeRead;
 
-  int numOfThreads = tsNumOfCores * tsNumOfThreadsPerCore;
+  int32_t numOfThreads = tsNumOfCores * tsNumOfThreadsPerCore;
   numOfThreads = (int32_t) ((1.0 - tsRatioOfQueryThreads) * numOfThreads / 2.0);
   if (numOfThreads < 1) {
     numOfThreads = 1;
diff --git a/src/dnode/src/dnodeWrite.c b/src/dnode/src/dnodeWrite.c
index aee14ed48414aa68590e246f8563806cd1df6a20..2e0ec5f95b1f00ae5ba60b978e7b00136bbf8efd 100644
--- a/src/dnode/src/dnodeWrite.c
+++ b/src/dnode/src/dnodeWrite.c
@@ -52,7 +52,6 @@ static void  dnodeHandleIdleWorker(SWriteWorker *pWorker);
 SWriteWorkerPool wWorkerPool;
 
 int32_t dnodeInitWrite() {
-
   wWorkerPool.max = tsNumOfCores;
   wWorkerPool.writeWorker = (SWriteWorker *)calloc(sizeof(SWriteWorker), wWorkerPool.max);
   if (wWorkerPool.writeWorker == NULL) return -1;
@@ -71,7 +70,7 @@ void dnodeCleanupWrite() {
 }
 
 void dnodeWrite(SRpcMsg *pMsg) {
-  char        *pCont       = (char *) pMsg->pCont;
+  char *pCont = (char *)pMsg->pCont;
 
   if (pMsg->msgType == TSDB_MSG_TYPE_SUBMIT || pMsg->msgType == TSDB_MSG_TYPE_MD_DROP_STABLE) {
     SMsgDesc *pDesc = (SMsgDesc *)pCont;
@@ -80,16 +79,16 @@ void dnodeWrite(SRpcMsg *pMsg) {
   }
 
   SMsgHead *pHead = (SMsgHead *) pCont;
-  pHead->vgId    = htonl(pHead->vgId);
-  pHead->contLen = htonl(pHead->contLen);
+  pHead->vgId     = htonl(pHead->vgId);
+  pHead->contLen  = htonl(pHead->contLen);
 
   taos_queue queue = vnodeGetWqueue(pHead->vgId);
   if (queue) {
     // put message into queue
     SWriteMsg *pWrite = (SWriteMsg *)taosAllocateQitem(sizeof(SWriteMsg));
-    pWrite->rpcMsg      = *pMsg;
-    pWrite->pCont       = pCont;
-    pWrite->contLen     = pHead->contLen;
+    pWrite->rpcMsg    = *pMsg;
+    pWrite->pCont     = pCont;
+    pWrite->contLen   = pHead->contLen;
 
     taosWriteQitem(queue, TAOS_QTYPE_RPC, pWrite);
   } else {
@@ -227,4 +226,3 @@ static void dnodeHandleIdleWorker(SWriteWorker *pWorker) {
      pthread_exit(NULL);
   }
 }
-
diff --git a/src/inc/mnode.h b/src/inc/mnode.h
index 2fbceb06dfccf5ebac4d7c461698248bbfa043ef..3f66c46d7b31ce4e0e690c539bb5f273aab649c6 100644
--- a/src/inc/mnode.h
+++ b/src/inc/mnode.h
@@ -98,7 +98,6 @@ typedef struct {
 
 typedef struct {
   int32_t  dnodeId;
-  int32_t  vnode;
   uint32_t privateIp;
   uint32_t publicIp;
 } SVnodeGid;
diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index 54899678ccccfc4b4ce4b3664d177a9f87ef89e0..841c5b658f1d37e31cc620872bf59f9790cb3c23 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -156,28 +156,9 @@ TAOS_DEFINE_ERROR(TSDB_CODE_QUERY_CANCELLED,            0, 110, "query cancelled
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_IE,                 0, 111, "invalid ie")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_VALUE,              0, 112, "invalid value")
 
-// TAOS_DEFINE_ERROR(TSDB_CODE_SYNC_REQUIRED,              0, 99, "sync required")
-// TAOS_DEFINE_ERROR(TSDB_CODE_UNSYNCED,                   0, 100, "unsyned")
-// TAOS_DEFINE_ERROR(TSDB_CODE_DATA_ALREADY_IMPORTED,      0, 75, "data already imported")
-// TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_COMMIT_LOG,         0, 109, "invalid commit log")       // commit log init failed
-// TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_VNODE_STATUS,       0, 116, "invalid vnode status")
-// TAOS_DEFINE_ERROR(TSDB_CODE_TIMESTAMP_OUT_OF_RANGE,     0, 105, "timestamp out of range")
-// TAOS_DEFINE_ERROR(TSDB_CODE_DUPLICATE_TAGS,             0, 112, "duplicate tags")           // tags value for join not unique
-// TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_SUBMIT_MSG,         0, 113, "invalid submit message")
-// TAOS_DEFINE_ERROR(TSDB_CODE_FAILED_TO_LOCK_RESOURCES,   0, 117, "failed to lock resources")
-// TAOS_DEFINE_ERROR(TSDB_CODE_FILE_BLOCK_TS_DISORDERED,   0, 108, "file block ts disordered") // time stamp in file block is disordered
-// TAOS_DEFINE_ERROR(TSDB_CODE_BATCH_SIZE_TOO_BIG,         0, 104, "batch size too big")
-// TAOS_DEFINE_ERROR(TSDB_CODE_WRONG_SCHEMA,               0, 53, "wrong schema")
-// TAOS_DEFINE_ERROR(TSDB_CODE_NO_QSUMMARY,                0, 68, "no qsummery")
-// TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_METER_ID,           0, 27, "invalid meter id")
-// TAOS_DEFINE_ERROR(TSDB_CODE_METRICMETA_EXPIRED,         0, 63, "metricmeta expired")    // local cached metric-meta expired causes error in metric query
-// TAOS_DEFINE_ERROR(TSDB_CODE_SESSION_ALREADY_EXIST,      0, 67, "session already exist")
-// TAOS_DEFINE_ERROR(TSDB_CODE_SESSION_NOT_READY,          0, 103, "session not ready")        // table NOT in ready state
-// TAOS_DEFINE_ERROR(TSDB_CODE_DATA_OVERFLOW,              0, 82, "data overflow")
-// TAOS_DEFINE_ERROR(TSDB_CODE_ACTION_TRANS_NOT_FINISHED,  0, 17, "action transaction not finished")
-// TAOS_DEFINE_ERROR(TSDB_CODE_ACTION_NOT_ONLINE,          0, 18, "action not online")
-// TAOS_DEFINE_ERROR(TSDB_CODE_ACTION_SEND_FAILD,          0, 19, "action send failed")
-// TAOS_DEFINE_ERROR(TSDB_CODE_NOT_ACTIVE_SESSION,         0, 20, "not active session")
+// others
+TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_FILE_FORMAT,        0, 120, "invalid file format")
+
 
 #ifdef TAOS_ERROR_C
 };
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index d4fd452952a93a6151b6fe6e4888627135f2e180..5550ebf1774b4877520a171e77fbc84b3a354dca 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -241,7 +241,8 @@ typedef struct SSchema {
 } SSchema;
 
 typedef struct {
-  int32_t  vnode;  // the index of vnode
+  int32_t  vgId;
+  int32_t  dnodeId;
   uint32_t ip;
 } SVnodeDesc;
 
diff --git a/src/mnode/inc/mgmtBalance.h b/src/mnode/inc/mgmtBalance.h
index 401074d1713b6ebe1ce95c3c882eaaf1499a85fe..05f2ed94a7f77a0c5314fe008106de62ff7b07c8 100644
--- a/src/mnode/inc/mgmtBalance.h
+++ b/src/mnode/inc/mgmtBalance.h
@@ -23,7 +23,7 @@ extern "C" {
 
 int32_t mgmtInitBalance();
 void    mgmtCleanupBalance();
-void    mgmtStartBalanceTimer(int32_t afterMs) ;
+void    mgmtBalanceNotify() ;
 int32_t mgmtAllocVnodes(SVgObj *pVgroup);
 
 #ifdef __cplusplus
diff --git a/src/mnode/src/mgmtBalance.c b/src/mnode/src/mgmtBalance.c
index 3a7ae8dcde4f9cfecf5367fd8faddf917921339a..e697d70d5808f98c87652089f08570bfcee9b7c8 100644
--- a/src/mnode/src/mgmtBalance.c
+++ b/src/mnode/src/mgmtBalance.c
@@ -18,11 +18,35 @@
 #include "mgmtBalance.h"
 #include "mgmtDnode.h"
 
-int32_t mgmtInitBalance() { return 0; }
-void    mgmtCleanupBalance() {}
-void    mgmtStartBalanceTimer(int32_t afterMs) {}
+extern int32_t balanceInit();
+extern void    balanceCleanUp();
+extern void    balanceNotify();
+extern int32_t balanceAllocVnodes(SVgObj *pVgroup);
+
+int32_t mgmtInitBalance() {
+#ifdef _VPEER
+  return balanceInit();
+#else
+  return 0;
+#endif
+}
+
+void mgmtCleanupBalance() {
+#ifdef _VPEER
+  balanceCleanUp();
+#endif
+}
+
+void mgmtBalanceNotify() {
+#ifdef _VPEER
+  balanceNotify();
+#endif
+}
 
 int32_t mgmtAllocVnodes(SVgObj *pVgroup) {
+#ifdef _VPEER
+  return balanceAllocVnodes(pVgroup);
+#else
   void *     pNode = NULL;
   SDnodeObj *pDnode = NULL;
   SDnodeObj *pSelDnode = NULL;
@@ -53,4 +77,5 @@ int32_t mgmtAllocVnodes(SVgObj *pVgroup) {
 
   mTrace("dnode:%d, alloc one vnode to vgroup, openVnodes:%d", pSelDnode->dnodeId, pSelDnode->openVnodes);
   return TSDB_CODE_SUCCESS;
+#endif  
 }
diff --git a/src/mnode/src/mgmtDnode.c b/src/mnode/src/mgmtDnode.c
index 14e23bad9f037fb0f3d13f82abdbe2c9220dbadc..ada0bce2e99881a7b91c17ccdbdf00384cdc1cc5 100644
--- a/src/mnode/src/mgmtDnode.c
+++ b/src/mnode/src/mgmtDnode.c
@@ -251,7 +251,7 @@ void mgmtProcessDnodeStatusMsg(SRpcMsg *rpcMsg) {
   if (pDnode->status != TSDB_DN_STATUS_READY) {
     mTrace("dnode:%d, from offline to online", pDnode->dnodeId);
     pDnode->status = TSDB_DN_STATUS_READY;
-    mgmtStartBalanceTimer(200);
+    mgmtBalanceNotify();
   }
 
   mgmtDecDnodeRef(pDnode);
diff --git a/src/mnode/src/mgmtTable.c b/src/mnode/src/mgmtTable.c
index cf20c47646f9c5e9d9a4779e830fd879e171a0f8..c4996fc4bb02592e8f3dfb914cfd24d47b0ae6fc 100644
--- a/src/mnode/src/mgmtTable.c
+++ b/src/mnode/src/mgmtTable.c
@@ -1512,7 +1512,8 @@ static int32_t mgmtDoGetChildTableMeta(SQueuedMsg *pMsg, STableMetaMsg *pMeta) {
     } else {
       pMeta->vpeerDesc[i].ip = pVgroup->vnodeGid[i].privateIp;
     }
-    pMeta->vpeerDesc[i].vnode = htonl(pVgroup->vnodeGid[i].vnode);
+    pMeta->vpeerDesc[i].vgId = htonl(pVgroup->vgId);
+    pMeta->vpeerDesc[i].dnodeId = htonl(pVgroup->vnodeGid[i].dnodeId);
   }
   pMeta->numOfVpeers = pVgroup->numOfVnodes;
 
diff --git a/src/mnode/src/mgmtVgroup.c b/src/mnode/src/mgmtVgroup.c
index 87f3872b0aaacba15c49a5e3678d94993518ad8a..bbf960203a533285e857a14b9299d155791cd0a5 100644
--- a/src/mnode/src/mgmtVgroup.c
+++ b/src/mnode/src/mgmtVgroup.c
@@ -32,7 +32,7 @@
 #include "mgmtVgroup.h"
 
 void   *tsVgroupSdb = NULL;
-static int32_t tsVgUpdateSize = 0;
+int32_t tsVgUpdateSize = 0;
 
 static int32_t mgmtGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn);
 static int32_t mgmtRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pConn);
@@ -93,11 +93,12 @@ static int32_t mgmtVgroupActionInsert(SSdbOperDesc *pOper) {
 
   for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
     SDnodeObj *pDnode = mgmtGetDnode(pVgroup->vnodeGid[i].dnodeId);
-    pVgroup->vnodeGid[i].privateIp = pDnode->privateIp;
-    pVgroup->vnodeGid[i].publicIp = pDnode->publicIp;
-    pVgroup->vnodeGid[i].vnode = pVgroup->vgId;
-    atomic_add_fetch_32(&pDnode->openVnodes, 1);
-    mgmtDecDnodeRef(pDnode);
+    if (pDnode != NULL) {
+      pVgroup->vnodeGid[i].privateIp = pDnode->privateIp;
+      pVgroup->vnodeGid[i].publicIp = pDnode->publicIp;
+      atomic_add_fetch_32(&pDnode->openVnodes, 1);    
+      mgmtDecDnodeRef(pDnode);
+    }     
   }
 
   mgmtAddVgroupIntoDb(pVgroup);
@@ -236,7 +237,7 @@ void mgmtCreateVgroup(SQueuedMsg *pMsg, SDbObj *pDb) {
 
   mPrint("vgroup:%d, is created in mnode, db:%s replica:%d", pVgroup->vgId, pDb->name, pVgroup->numOfVnodes);
   for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
-    mPrint("vgroup:%d, index:%d, dnode:%d vnode:%d", pVgroup->vgId, i, pVgroup->vnodeGid[i].dnodeId, pVgroup->vnodeGid[i].vnode);
+    mPrint("vgroup:%d, index:%d, dnode:%d", pVgroup->vgId, i, pVgroup->vnodeGid[i].dnodeId);
   }
 
   pMsg->ahandle = pVgroup;
@@ -312,27 +313,21 @@ int32_t mgmtGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
   }
 
   for (int32_t i = 0; i < maxReplica; ++i) {
-    pShow->bytes[cols] = 16;
-    pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-    strcpy(pSchema[cols].name, "ip");
-    pSchema[cols].bytes = htons(pShow->bytes[cols]);
-    cols++;
-
     pShow->bytes[cols] = 2;
     pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
-    strcpy(pSchema[cols].name, "vnode");
+    strcpy(pSchema[cols].name, "dnode");
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
 
-    pShow->bytes[cols] = 9;
+    pShow->bytes[cols] = 16;
     pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-    strcpy(pSchema[cols].name, "vnode status");
+    strcpy(pSchema[cols].name, "ip");
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
 
-    pShow->bytes[cols] = 16;
+    pShow->bytes[cols] = 9;
     pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-    strcpy(pSchema[cols].name, "public ip");
+    strcpy(pSchema[cols].name, "vstatus");
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
   }
@@ -416,13 +411,13 @@ int32_t mgmtRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pCo
     cols++;
 
     for (int32_t i = 0; i < maxReplica; ++i) {
-      tinet_ntoa(ipstr, pVgroup->vnodeGid[i].privateIp);
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      strcpy(pWrite, ipstr);
+      *(int16_t *) pWrite = pVgroup->vnodeGid[i].dnodeId;
       cols++;
 
+      tinet_ntoa(ipstr, pVgroup->vnodeGid[i].privateIp);
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      *(int16_t *) pWrite = pVgroup->vnodeGid[i].vnode;
+      strcpy(pWrite, ipstr);
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
@@ -433,11 +428,6 @@ int32_t mgmtRetrieveVgroups(SShowObj *pShow, char *data, int32_t rows, void *pCo
         strcpy(pWrite, "null");
       }
       cols++;
-
-      tinet_ntoa(ipstr, pVgroup->vnodeGid[i].publicIp);
-      pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      strcpy(pWrite, ipstr);
-      cols++;
     }
 
     numOfRows++;
@@ -490,15 +480,15 @@ SMDCreateVnodeMsg *mgmtBuildCreateVnodeMsg(SVgObj *pVgroup) {
   pCfg->daysToKeep2                  = htonl(pCfg->daysToKeep2);
   pCfg->daysToKeep                   = htonl(pCfg->daysToKeep);
   pCfg->commitTime                   = htonl(pCfg->commitTime);
-  pCfg->commitLog                    = pCfg->commitLog;
-  pCfg->blocksPerTable               = htons(pCfg->blocksPerTable);
-  pCfg->replications                 = (char) pVgroup->numOfVnodes;
   pCfg->rowsInFileBlock              = htonl(pCfg->rowsInFileBlock);
-
+  pCfg->blocksPerTable               = htons(pCfg->blocksPerTable);
+  pCfg->replications                 = (int8_t) pVgroup->numOfVnodes;
+  
   SVnodeDesc *vpeerDesc = pVnode->vpeerDesc;
   for (int32_t j = 0; j < pVgroup->numOfVnodes; ++j) {
-    vpeerDesc[j].vnode = htonl(pVgroup->vnodeGid[j].vnode);
-    vpeerDesc[j].ip    = htonl(pVgroup->vnodeGid[j].privateIp);
+    vpeerDesc[j].vgId    = htonl(pVgroup->vgId);
+    vpeerDesc[j].dnodeId = htonl(pVgroup->vnodeGid[j].dnodeId);
+    vpeerDesc[j].ip      = htonl(pVgroup->vnodeGid[j].privateIp);
   }
 
   return pVnode;
diff --git a/src/vnode/main/inc/vnodeInt.h b/src/vnode/main/inc/vnodeInt.h
index 5ee1d5c18b658ebb333ed24436eaaa5738abdf84..7e6caf6168a7ad758f4eb4e2c4858b4db2d639f5 100644
--- a/src/vnode/main/inc/vnodeInt.h
+++ b/src/vnode/main/inc/vnodeInt.h
@@ -41,6 +41,8 @@ typedef struct {
   void        *sync;
   void        *events;
   void        *cq;  // continuous query
+  int32_t      replicas;
+  SVnodeDesc   vpeers[TSDB_MAX_MPEERS];
 } SVnodeObj;
 
 int  vnodeWriteToQueue(void *param, SWalHead *pHead, int type);
diff --git a/src/vnode/main/src/vnodeMain.c b/src/vnode/main/src/vnodeMain.c
index 31004d3033f97b6d1af35be341524791b362fdbd..e7081351765ec02c53509bfc60ae43a38c8db564 100644
--- a/src/vnode/main/src/vnodeMain.c
+++ b/src/vnode/main/src/vnodeMain.c
@@ -29,16 +29,17 @@
 #include "vnode.h"
 #include "vnodeInt.h"
 
-static void *tsDnodeVnodesHash;
-static void  vnodeCleanUp(SVnodeObj *pVnode);
-static void  vnodeBuildVloadMsg(char *pNode, void * param);
-static int   vnodeWALCallback(void *arg);
+static void   *tsDnodeVnodesHash;
+static void    vnodeCleanUp(SVnodeObj *pVnode);
+static void    vnodeBuildVloadMsg(char *pNode, void * param);
+static int     vnodeWALCallback(void *arg);
+static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg);
+static int32_t vnodeReadCfg(SVnodeObj *pVnode);
 
 static int   tsOpennedVnodes;
 static pthread_once_t  vnodeModuleInit = PTHREAD_ONCE_INIT;
 
 static void vnodeInit() {
-
   vnodeInitWriteFp();
 
   tsDnodeVnodesHash = taosInitIntHash(TSDB_MAX_VNODES, sizeof(SVnodeObj *), taosHashInt);
@@ -51,12 +52,12 @@ int32_t vnodeCreate(SMDCreateVnodeMsg *pVnodeCfg) {
   int32_t code;
   pthread_once(&vnodeModuleInit, vnodeInit);
 
-  SVnodeObj *pTemp = (SVnodeObj *) taosGetIntHashData(tsDnodeVnodesHash, pVnodeCfg->cfg.vgId);
+  SVnodeObj *pTemp = (SVnodeObj *)taosGetIntHashData(tsDnodeVnodesHash, pVnodeCfg->cfg.vgId);
 
   if (pTemp != NULL) {
     dPrint("vgId:%d, vnode already exist, pVnode:%p", pVnodeCfg->cfg.vgId, pTemp);
     return TSDB_CODE_SUCCESS;
-  } 
+  }
 
   STsdbCfg tsdbCfg = {0};
   tsdbCfg.precision           = pVnodeCfg->cfg.precision;
@@ -81,12 +82,18 @@ int32_t vnodeCreate(SMDCreateVnodeMsg *pVnodeCfg) {
     }
   }
 
+  code = vnodeSaveCfg(pVnodeCfg);
+  if (code != TSDB_CODE_SUCCESS) {
+    dError("vgId:%d, failed to save vnode cfg, reason:%s", pVnodeCfg->cfg.vgId, tstrerror(code));
+    return code;
+  }
+
   char tsdbDir[TSDB_FILENAME_LEN] = {0};
   sprintf(tsdbDir, "%s/vnode%d/tsdb", tsVnodeDir, pVnodeCfg->cfg.vgId);
   code = tsdbCreateRepo(tsdbDir, &tsdbCfg, NULL);
-  if (code <0) {
+  if (code != TSDB_CODE_SUCCESS) {
     dError("vgId:%d, failed to create tsdb in vnode, reason:%s", pVnodeCfg->cfg.vgId, tstrerror(terrno));
-    return code;
+    return terrno;
   }
 
   dPrint("vgId:%d, vnode is created, clog:%d", pVnodeCfg->cfg.vgId, pVnodeCfg->cfg.commitLog);
@@ -121,6 +128,13 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   pVnode->version  = 0;  
   taosAddIntHash(tsDnodeVnodesHash, pVnode->vgId, (char *)(&pVnode));
 
+  int32_t code = vnodeReadCfg(pVnode);
+  if (code != TSDB_CODE_SUCCESS) {
+    dError("pVnode:%p vgId:%d, failed to read cfg file", pVnode, pVnode->vgId);
+    taosDeleteIntHash(tsDnodeVnodesHash, pVnode->vgId);
+    return code;
+  }
+
   pVnode->wqueue = dnodeAllocateWqueue(pVnode);
   pVnode->rqueue = dnodeAllocateRqueue(pVnode);
 
@@ -258,7 +272,63 @@ static void vnodeCleanUp(SVnodeObj *pVnode) {
   vnodeRelease(pVnode);
 }
 
+// TODO: this is a simple implement
 static int vnodeWALCallback(void *arg) {
   SVnodeObj *pVnode = arg;
   return walRenew(pVnode->wal);
+}
+
+static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg) {
+  char cfgFile[TSDB_FILENAME_LEN * 2] = {0};
+  sprintf(cfgFile, "%s/vnode%d/config", tsVnodeDir, pVnodeCfg->cfg.vgId);
+
+  FILE *fp = fopen(cfgFile, "w");
+  if (!fp) return errno;
+
+  fprintf(fp, "replicas %d\n", pVnodeCfg->cfg.replications);
+  for (int32_t i = 0; i < pVnodeCfg->cfg.replications; i++) {
+    fprintf(fp, "index%d dnode %d ip %u\n", i, pVnodeCfg->vpeerDesc[i].dnodeId, pVnodeCfg->vpeerDesc[i].ip);
+  }
+
+  fclose(fp);
+  dTrace("vgId:%d, save vnode cfg successed", pVnodeCfg, pVnodeCfg->cfg.vgId);
+
+  return TSDB_CODE_SUCCESS;
+}
+
+// TODO: this is a simple implement
+static int32_t vnodeReadCfg(SVnodeObj *pVnode) {
+  char cfgFile[TSDB_FILENAME_LEN * 2] = {0};
+  sprintf(cfgFile, "%s/vnode%d/config", tsVnodeDir, pVnode->vgId);
+
+  FILE *fp = fopen(cfgFile, "r");
+  if (!fp) return errno;
+
+  char    option[3][32] = {0};
+  int32_t replicas = 0;
+  int32_t num = fscanf(fp, "%s %d", option[0], &replicas);
+  if (num != 2) return TSDB_CODE_INVALID_FILE_FORMAT;
+  if (strcmp(option[0], "replicas") != 0) return TSDB_CODE_INVALID_FILE_FORMAT;
+  if (replicas == 0) return TSDB_CODE_INVALID_FILE_FORMAT;
+  pVnode->replicas = replicas;
+
+  for (int32_t i = 0; i < replicas; ++i) {
+    int32_t  dnodeId = 0;
+    uint32_t dnodeIp = 0;
+    num = fscanf(fp, "%s %s %d %s %u", option[0], option[1], &dnodeId, option[2], &dnodeIp);
+    if (num != 5) return TSDB_CODE_INVALID_FILE_FORMAT;
+    if (strcmp(option[1], "dnode") != 0) return TSDB_CODE_INVALID_FILE_FORMAT;
+    if (strcmp(option[2], "ip") != 0) return TSDB_CODE_INVALID_FILE_FORMAT;
+    if (dnodeId == 0) return TSDB_CODE_INVALID_FILE_FORMAT;
+    if (dnodeIp == 0) return TSDB_CODE_INVALID_FILE_FORMAT;
+
+    pVnode->vpeers[i].dnodeId = dnodeId;
+    pVnode->vpeers[i].ip = dnodeIp;
+    pVnode->vpeers[i].vgId = pVnode->vgId;
+  }
+
+  fclose(fp);
+  dTrace("pVnode:%p vgId:%d, read vnode cfg successed", pVnode, pVnode->vgId);
+
+  return TSDB_CODE_SUCCESS;
 }
\ No newline at end of file