diff --git a/src/inc/mnode.h b/src/inc/mnode.h
index 3f66c46d7b31ce4e0e690c539bb5f273aab649c6..651ad0036edf9f80abad52660e9cdc813b89dcde 100644
--- a/src/inc/mnode.h
+++ b/src/inc/mnode.h
@@ -147,9 +147,10 @@ typedef struct _vg_obj {
   int64_t         createdTime;
   SVnodeGid       vnodeGid[TSDB_VNODES_SUPPORT];
   int32_t         numOfVnodes;
-  int32_t         lbIp;
+  int32_t         lbDnodeId;
   int32_t         lbTime;
-  int8_t          lbStatus;
+  int8_t          status;
+
   int8_t          reserved[14];
   int8_t          updateEnd[1];
   int32_t         refCount;
diff --git a/src/mnode/inc/mgmtDnode.h b/src/mnode/inc/mgmtDnode.h
index f262cd3c5e8d9ed95db23112e62b65d8c4b35c75..9c9ddea3467471ec24aef91e0f642e6c555ffd1c 100644
--- a/src/mnode/inc/mgmtDnode.h
+++ b/src/mnode/inc/mgmtDnode.h
@@ -21,12 +21,19 @@ extern "C" {
 #endif
 #include "mnode.h"
 
+enum _TSDB_DN_STATUS {
+  TSDB_DN_STATUS_OFFLINE,
+  TSDB_DN_STATUS_DROPING,
+  TSDB_DN_STATUS_BALANCING,
+  TSDB_DN_STATUS_READY
+};
+
 int32_t mgmtInitDnodes();
 void    mgmtCleanUpDnodes();
 int32_t mgmtGetDnodesNum();
 void *  mgmtGetNextDnode(void *pNode, SDnodeObj **pDnode);
-void    mgmtIncDnodeRef(SDnodeObj *pDnode);
-void    mgmtDecDnodeRef(SDnodeObj *pDnode);
+void    mgmtReleaseDnode(SDnodeObj *pDnode);
+char*   mgmtGetDnodeStatusStr(int32_t dnodeStatus);
 SDnodeObj* mgmtGetDnode(int32_t dnodeId);
 SDnodeObj* mgmtGetDnodeByIp(uint32_t ip);
 
diff --git a/src/mnode/inc/mgmtVgroup.h b/src/mnode/inc/mgmtVgroup.h
index d0b1e0de971a0adea6f2aec65bb0eeb6da337438..b4d50a83187a5dfe9160221ad1a731c4124ea8e6 100644
--- a/src/mnode/inc/mgmtVgroup.h
+++ b/src/mnode/inc/mgmtVgroup.h
@@ -27,10 +27,12 @@ extern "C" {
 int32_t mgmtInitVgroups();
 void    mgmtCleanUpVgroups();
 SVgObj *mgmtGetVgroup(int32_t vgId);
-void    mgmtIncVgroupRef(SVgObj *pVgroup);
-void    mgmtDecVgroupRef(SVgObj *pVgroup);
+void    mgmtReleaseVgroup(SVgObj *pVgroup);
 void    mgmtDropAllVgroups(SDbObj *pDropDb);
 
+void *  mgmtGetNextVgroup(void *pNode, SVgObj **pVgroup);
+void    mgmtUpdateVgroup(SVgObj *pVgroup);
+
 void    mgmtCreateVgroup(SQueuedMsg *pMsg, SDbObj *pDb);
 void    mgmtDropVgroup(SVgObj *pVgroup, void *ahandle);
 void    mgmtAlterVgroup(SVgObj *pVgroup, void *ahandle);
diff --git a/src/mnode/src/mgmtDnode.c b/src/mnode/src/mgmtDnode.c
index ada0bce2e99881a7b91c17ccdbdf00384cdc1cc5..7019d8e20a49f6fb83a52864202041043f1f5e42 100644
--- a/src/mnode/src/mgmtDnode.c
+++ b/src/mnode/src/mgmtDnode.c
@@ -42,8 +42,7 @@ extern int32_t clusterInit();
 extern void    clusterCleanUp();
 extern int32_t clusterGetDnodesNum();
 extern void *  clusterGetNextDnode(void *pNode, SDnodeObj **pDnode);
-extern void    clusterIncDnodeRef(SDnodeObj *pDnode);
-extern void    clusterDecDnodeRef(SDnodeObj *pDnode);
+extern void    clusterReleaseDnode(SDnodeObj *pDnode);
 extern SDnodeObj* clusterGetDnode(int32_t dnodeId);
 extern SDnodeObj* clusterGetDnodeByIp(uint32_t ip);
 #ifndef _CLUSTER
@@ -120,15 +119,9 @@ int32_t mgmtGetDnodesNum() {
 #endif
 }
 
-void mgmtIncDnodeRef(SDnodeObj *pDnode) {
+void mgmtReleaseDnode(SDnodeObj *pDnode) {
 #ifdef _CLUSTER
-  return clusterIncDnodeRef(pDnode);
-#endif
-}
-
-void mgmtDecDnodeRef(SDnodeObj *pDnode) {
-#ifdef _CLUSTER
-  return clusterDecDnodeRef(pDnode);
+  return clusterReleaseDnode(pDnode);
 #endif
 }
 
@@ -724,4 +717,14 @@ static int32_t mgmtRetrieveVnodes(SShowObj *pShow, char *data, int32_t rows, voi
   
   pShow->numOfReads += numOfRows;
   return numOfRows;
-}
\ No newline at end of file
+}
+
+char* mgmtGetDnodeStatusStr(int32_t dnodeStatus) {
+  switch (dnodeStatus) {
+    case TSDB_DN_STATUS_OFFLINE:   return "offline";
+    case TSDB_DN_STATUS_DROPING:   return "dropping";
+    case TSDB_DN_STATUS_BALANCING: return "balancing";
+    case TSDB_DN_STATUS_READY:     return "ready";
+    default:                       return "undefined";
+  }
+}
diff --git a/src/mnode/src/mgmtVgroup.c b/src/mnode/src/mgmtVgroup.c
index bbf960203a533285e857a14b9299d155791cd0a5..c16cae775cfacd23c8637d382bfd19ee3c2c30fd 100644
--- a/src/mnode/src/mgmtVgroup.c
+++ b/src/mnode/src/mgmtVgroup.c
@@ -190,11 +190,7 @@ int32_t mgmtInitVgroups() {
   return 0;
 }
 
-void mgmtIncVgroupRef(SVgObj *pVgroup) { 
-  return sdbIncRef(tsVgroupSdb, pVgroup); 
-}
-
-void mgmtDecVgroupRef(SVgObj *pVgroup) { 
+void mgmtReleaseVgroup(SVgObj *pVgroup) { 
   return sdbDecRef(tsVgroupSdb, pVgroup); 
 }
 
@@ -202,6 +198,18 @@ SVgObj *mgmtGetVgroup(int32_t vgId) {
   return (SVgObj *)sdbGetRow(tsVgroupSdb, &vgId);
 }
 
+void mgmtUpdateVgroup(SVgObj *pVgroup) {
+  SSdbOperDesc oper = {
+    .type = SDB_OPER_TYPE_GLOBAL,
+    .table = tsVgroupSdb,
+    .pObj = pVgroup,
+    .rowSize = tsVgUpdateSize
+  };
+
+  sdbUpdateRow(&oper);
+  mgmtSendCreateVgroupMsg(pVgroup, NULL);
+}
+
 SVgObj *mgmtGetAvailableVgroup(SDbObj *pDb) {
   return pDb->pHead;
 }
diff --git a/src/util/inc/tstatus.h b/src/util/inc/tstatus.h
index 223ed1d52dcb8dea8f832fd26f7972333eb9550c..4fa392ca35846168e26c20637df2d7e3dd97c126 100644
--- a/src/util/inc/tstatus.h
+++ b/src/util/inc/tstatus.h
@@ -24,15 +24,6 @@ extern "C" {
 #include <stdbool.h>
 #include "taoserror.h"
 
-enum _TSDB_VG_STATUS {
-  TSDB_VG_STATUS_READY               = TSDB_CODE_SUCCESS,
-  TSDB_VG_STATUS_IN_PROGRESS         = 1, //TSDB_CODE_ACTION_IN_PROGRESS,
-  TSDB_VG_STATUS_NO_DISK_PERMISSIONS = 73,//TSDB_CODE_NO_DISK_PERMISSIONS,
-  TSDB_VG_STATUS_SERVER_NO_PACE      = 110, //TSDB_CODE_SERV_NO_DISKSPACE,
-  TSDB_VG_STATUS_SERV_OUT_OF_MEMORY  = 69, //TSDB_CODE_SERV_OUT_OF_MEMORY,
-  TSDB_VG_STATUS_INIT_FAILED         = 74, //TSDB_CODE_VG_INIT_FAILED,
-  TSDB_VG_STATUS_FULL                = 48, //TSDB_CODE_NO_ENOUGH_DNODES,
-};
 
 enum _TSDB_DB_STATUS {
   TSDB_DB_STATUS_READY,
@@ -75,21 +66,9 @@ enum _TSDB_MN_ROLE {
   TSDB_MN_ROLE_MASTER
 };
 
-enum _TSDB_DN_STATUS {
-  TSDB_DN_STATUS_OFFLINE,
-  TSDB_DN_STATUS_READY
-};
-
-enum _TSDB_DN_LB_STATUS {
-  TSDB_DN_LB_STATUS_BALANCED,
-  TSDB_DN_LB_STATUS_BALANCING,
-  TSDB_DN_LB_STATUS_OFFLINE_REMOVING,
-  TSDB_DN_LB_STATE_SHELL_REMOVING
-};
-
-enum _TSDB_VG_LB_STATUS {
-  TSDB_VG_LB_STATUS_READY,
-  TSDB_VG_LB_STATUS_UPDATE
+enum _TSDB_VG_STATUS {
+  TSDB_VG_STATUS_READY,
+  TSDB_VG_STATUS_UPDATE
 };
 
 enum _TSDB_VN_STREAM_STATUS {
@@ -111,7 +90,6 @@ char* taosGetDbStatusStr(int32_t dbStatus);
 char* taosGetVnodeStatusStr(int32_t vnodeStatus);
 char* taosGetVnodeSyncStatusStr(int32_t vnodeSyncStatus);
 char* taosGetVnodeDropStatusStr(int32_t dropping);
-char* taosGetDnodeStatusStr(int32_t dnodeStatus);
 char* taosGetDnodeLbStatusStr(int32_t dnodeBalanceStatus);
 char* taosGetVgroupLbStatusStr(int32_t vglbStatus);
 char* taosGetVnodeStreamStatusStr(int32_t vnodeStreamStatus);
diff --git a/src/util/src/tstatus.c b/src/util/src/tstatus.c
index e8534de30b82edd1f6182137d85342e7d6f6094b..cfcbea0ca14400192ef2b9d6ffc821cae2a6df09 100644
--- a/src/util/src/tstatus.c
+++ b/src/util/src/tstatus.c
@@ -69,14 +69,6 @@ char* taosGetVnodeDropStatusStr(int32_t dropping) {
   }
 }
 
-char* taosGetDnodeStatusStr(int32_t dnodeStatus) {
-  switch (dnodeStatus) {
-    case TSDB_DN_STATUS_OFFLINE: return "offline";
-    case TSDB_DN_STATUS_READY:   return "ready";
-    default:                     return "undefined";
-  }
-}
-
 char* taosGetDnodeLbStatusStr(int32_t dnodeBalanceStatus) {
   switch (dnodeBalanceStatus) {
     case TSDB_DN_LB_STATUS_BALANCED:         return "balanced";