diff --git a/src/inc/tcluster.h b/src/inc/tcluster.h
index 28467ca6837fb9579881972525ac9b3601e82650..769a819b90fcb915b01f9a81740d02cda6c7f7de 100644
--- a/src/inc/tcluster.h
+++ b/src/inc/tcluster.h
@@ -36,6 +36,7 @@ enum _TAOS_DN_STATUS {
 int32_t clusterInit();
 void    clusterCleanUp();
 char*   clusterGetDnodeStatusStr(int32_t dnodeStatus);
+bool    clusterCheckModuleInDnode(struct _dnode_obj *pDnode, int moduleType);
 
 int32_t clusterInitDnodes();
 void    clusterCleanupDnodes();
diff --git a/src/mnode/src/mgmtDnode.c b/src/mnode/src/mgmtDnode.c
index e6d186ac1bbac5ccc829485df0d1c298caed80ab..e4ab1140909f1a5fc892ab38075cda809e744bab 100644
--- a/src/mnode/src/mgmtDnode.c
+++ b/src/mnode/src/mgmtDnode.c
@@ -323,8 +323,7 @@ static int32_t clusterRetrieveDnodes(SShowObj *pShow, char *data, int32_t rows,
   char       ipstr[32];
 
   while (numOfRows < rows) {
-    clusterReleaseDnode(pDnode);
-    pShow->pNode = clusterGetNextDnode(pShow->pNode, (SDnodeObj **)&pDnode);
+    pShow->pNode = clusterGetNextDnode(pShow->pNode, &pDnode);
     if (pDnode == NULL) break;
 
     cols = 0;
@@ -366,13 +365,14 @@ static int32_t clusterRetrieveDnodes(SShowObj *pShow, char *data, int32_t rows,
 #endif    
 
     numOfRows++;
+    clusterReleaseDnode(pDnode);
   }
 
   pShow->numOfReads += numOfRows;
   return numOfRows;
 }
 
-static bool clusterCheckModuleInDnode(SDnodeObj *pDnode, int32_t moduleType) {
+bool clusterCheckModuleInDnode(SDnodeObj *pDnode, int32_t moduleType) {
   uint32_t status = pDnode->moduleStatus & (1 << moduleType);
   return status > 0;
 }
diff --git a/src/mnode/src/mgmtSdb.c b/src/mnode/src/mgmtSdb.c
index 60614157f19f15082208722e6cbb9d3dd7d88ddd..ef2a23cd12ff309ef234defeefd2d624f0f2c9e4 100644
--- a/src/mnode/src/mgmtSdb.c
+++ b/src/mnode/src/mgmtSdb.c
@@ -520,6 +520,11 @@ int32_t sdbInsertRow(SSdbOperDesc *pOper) {
   
   if (pTable->keyType == SDB_KEY_TYPE_AUTO) {
     *((uint32_t *)pOper->pObj) = ++pTable->autoIndex;
+
+    // let vgId increase from 2
+    if (pTable->autoIndex == 1 && strcmp(pTable->tableName, "vgroups") == 0) {
+      *((uint32_t *)pOper->pObj) = ++pTable->autoIndex;
+    }
   }
   pTable->version++;
   sdbVersion++;
diff --git a/src/util/src/tglobalcfg.c b/src/util/src/tglobalcfg.c
index 8a0d66068e92e5823788f8104885205e19de6708..88a3be0e02750a780b2c2b65fca152444b3c7578 100644
--- a/src/util/src/tglobalcfg.c
+++ b/src/util/src/tglobalcfg.c
@@ -111,7 +111,12 @@ short tsDaysPerFile = 10;
 int   tsDaysToKeep = 3650;
 int   tsReplications = TSDB_REPLICA_MIN_NUM;
 
+#ifdef _MPEER
 int  tsNumOfMPeers = 3;
+#else
+int  tsNumOfMPeers = 1;
+#endif
+
 int  tsMaxShellConns = 2000;
 int  tsMaxTables = 100000;
 
@@ -552,9 +557,11 @@ static void doInitGlobalConfig() {
   tsInitConfigOption(cfg++, "tblocks", &tsNumOfBlocksPerMeter, TSDB_CFG_VTYPE_SHORT,
                      TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW,
                      32, 4096, 0, TSDB_CFG_UTYPE_NONE);
+#ifdef _MPEER                     
   tsInitConfigOption(cfg++, "numOfMPeers", &tsNumOfMPeers, TSDB_CFG_VTYPE_INT,
                      TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW | TSDB_CFG_CTYPE_B_CLUSTER,
                      1, 3, 0, TSDB_CFG_UTYPE_NONE);
+#endif 
   tsInitConfigOption(cfg++, "balanceInterval", &tsBalanceStartInterval, TSDB_CFG_VTYPE_INT,
                      TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW | TSDB_CFG_CTYPE_B_CLUSTER,
                      1, 30000, 0, TSDB_CFG_UTYPE_NONE);