diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 2519f4247d5a795939757f0b1ce31bd8bb5f0ba3..7ff52b83d56b21357ac1c418aa2d29ab8bfdf5a5 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -805,19 +805,19 @@ typedef struct {
   int8_t   replica;
   int8_t   selfIndex;
   SReplica replicas[TSDB_MAX_REPLICA];
-} SCreateVnodeMsg, SAlterVnodeMsg;
+} SCreateVnodeReq, SAlterVnodeReq;
 
 typedef struct {
   int32_t  vgId;
   int32_t  dnodeId;
-  char     db[TSDB_DB_FNAME_LEN];
   uint64_t dbUid;
-} SDropVnodeMsg, SSyncVnodeMsg, SCompactVnodeMsg;
+  char     db[TSDB_DB_FNAME_LEN];
+} SDropVnodeReq, SSyncVnodeReq, SCompactVnodeReq;
 
 typedef struct {
   int32_t vgId;
   int8_t  accessState;
-} SAuthVnodeMsg;
+} SAuthVnodeReq;
 
 typedef struct {
   SMsgHead header;
diff --git a/include/dnode/vnode/vnode.h b/include/dnode/vnode/vnode.h
index af56d69b11f47ba2102ad3ab69ce5d84d349f1bd..f3ad0b017634c7dcc4a530d8e28060c480ad58f9 100644
--- a/include/dnode/vnode/vnode.h
+++ b/include/dnode/vnode/vnode.h
@@ -32,6 +32,8 @@ extern "C" {
 /* ------------------------ TYPES EXPOSED ------------------------ */
 typedef struct SVnode SVnode;
 typedef struct SVnodeCfg {
+  int32_t vgId;
+
   /** vnode buffer pool options */
   struct {
     /** write buffer size */
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 56f05ec0bfe2c5bf884790a5fba2e5b88811168a..80241405a60ce7d05291eb79d838b5fe9218551d 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -277,9 +277,12 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_DND_BNODE_INVALID_OPTION      TAOS_DEF_ERROR_CODE(0, 0x0452)
 #define TSDB_CODE_DND_BNODE_READ_FILE_ERROR     TAOS_DEF_ERROR_CODE(0, 0x0453)
 #define TSDB_CODE_DND_BNODE_WRITE_FILE_ERROR    TAOS_DEF_ERROR_CODE(0, 0x0454)
-#define TSDB_CODE_DND_VNODE_TOO_MANY_VNODES     TAOS_DEF_ERROR_CODE(0, 0x0460)
-#define TSDB_CODE_DND_VNODE_READ_FILE_ERROR     TAOS_DEF_ERROR_CODE(0, 0x0461)
-#define TSDB_CODE_DND_VNODE_WRITE_FILE_ERROR    TAOS_DEF_ERROR_CODE(0, 0x0462)
+#define TSDB_CODE_DND_VNODE_ALREADY_DEPLOYED    TAOS_DEF_ERROR_CODE(0, 0x0460)
+#define TSDB_CODE_DND_VNODE_NOT_DEPLOYED        TAOS_DEF_ERROR_CODE(0, 0x0461)
+#define TSDB_CODE_DND_VNODE_INVALID_OPTION      TAOS_DEF_ERROR_CODE(0, 0x0462)
+#define TSDB_CODE_DND_VNODE_READ_FILE_ERROR     TAOS_DEF_ERROR_CODE(0, 0x0463)
+#define TSDB_CODE_DND_VNODE_WRITE_FILE_ERROR    TAOS_DEF_ERROR_CODE(0, 0x0464)
+#define TSDB_CODE_DND_VNODE_TOO_MANY_VNODES     TAOS_DEF_ERROR_CODE(0, 0x0465)
 
 // vnode
 #define TSDB_CODE_VND_ACTION_IN_PROGRESS        TAOS_DEF_ERROR_CODE(0, 0x0500)  //"Action in progress")
diff --git a/source/dnode/mgmt/impl/inc/dndVnodes.h b/source/dnode/mgmt/impl/inc/dndVnodes.h
index bf5f0122c131e0df025665197449f82be2f7b244..b5fae629592986923476ac44ce28d908bd628554 100644
--- a/source/dnode/mgmt/impl/inc/dndVnodes.h
+++ b/source/dnode/mgmt/impl/inc/dndVnodes.h
@@ -29,12 +29,12 @@ void    dndProcessVnodeSyncMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet);
 void    dndProcessVnodeQueryMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet);
 void    dndProcessVnodeFetchMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet);
 
-int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg);
-int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg);
-int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg);
-int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg);
-int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg);
-int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg);
+int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *pReq);
+int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *pReq);
+int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq);
+int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *pReq);
+int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *pReq);
+int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *pReq);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mgmt/impl/src/dndBnode.c b/source/dnode/mgmt/impl/src/dndBnode.c
index 61b220158fb7b78a8a20b97ff17b89fa401c3ff5..15be59a4193c8964a6509abf47beaa21b6d91a3e 100644
--- a/source/dnode/mgmt/impl/src/dndBnode.c
+++ b/source/dnode/mgmt/impl/src/dndBnode.c
@@ -42,18 +42,13 @@ static SBnode *dndAcquireBnode(SDnode *pDnode) {
 }
 
 static void dndReleaseBnode(SDnode *pDnode, SBnode *pBnode) {
-  SBnodeMgmt *pMgmt = &pDnode->bmgmt;
-  int32_t     refCount = 0;
+  if (pBnode == NULL) return;
 
+  SBnodeMgmt *pMgmt = &pDnode->bmgmt;
   taosRLockLatch(&pMgmt->latch);
-  if (pBnode != NULL) {
-    refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
-  }
+  int32_t refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
   taosRUnLockLatch(&pMgmt->latch);
-
-  if (pBnode != NULL) {
-    dTrace("release bnode, refCount:%d", refCount);
-  }
+  dTrace("release bnode, refCount:%d", refCount);
 }
 
 static int32_t dndReadBnodeFile(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndMnode.c b/source/dnode/mgmt/impl/src/dndMnode.c
index ae37967b3db960ca6005d03aba3a084b70d657b1..6c23af7f002970d10a89f3dfc441bc82ba2f8c2b 100644
--- a/source/dnode/mgmt/impl/src/dndMnode.c
+++ b/source/dnode/mgmt/impl/src/dndMnode.c
@@ -43,18 +43,13 @@ static SMnode *dndAcquireMnode(SDnode *pDnode) {
 }
 
 static void dndReleaseMnode(SDnode *pDnode, SMnode *pMnode) {
-  SMnodeMgmt *pMgmt = &pDnode->mmgmt;
-  int32_t     refCount = 0;
+  if (pMnode == NULL) return;
 
+  SMnodeMgmt *pMgmt = &pDnode->mmgmt;
   taosRLockLatch(&pMgmt->latch);
-  if (pMnode != NULL) {
-    refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
-  }
+  int32_t refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
   taosRUnLockLatch(&pMgmt->latch);
-
-  if (pMnode != NULL) {
-    dTrace("release mnode, refCount:%d", refCount);
-  }
+  dTrace("release mnode, refCount:%d", refCount);
 }
 
 static int32_t dndReadMnodeFile(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndQnode.c b/source/dnode/mgmt/impl/src/dndQnode.c
index 3deee93e293a1cb117e84e551f7bb4c4aeab0552..9d2f623c4578aea7d4180a66c09710fc4bb320c5 100644
--- a/source/dnode/mgmt/impl/src/dndQnode.c
+++ b/source/dnode/mgmt/impl/src/dndQnode.c
@@ -42,18 +42,13 @@ static SQnode *dndAcquireQnode(SDnode *pDnode) {
 }
 
 static void dndReleaseQnode(SDnode *pDnode, SQnode *pQnode) {
-  SQnodeMgmt *pMgmt = &pDnode->qmgmt;
-  int32_t     refCount = 0;
+  if (pQnode == NULL) return;
 
+  SQnodeMgmt *pMgmt = &pDnode->qmgmt;
   taosRLockLatch(&pMgmt->latch);
-  if (pQnode != NULL) {
-    refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
-  }
+  int32_t refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
   taosRUnLockLatch(&pMgmt->latch);
-
-  if (pQnode != NULL) {
-    dTrace("release qnode, refCount:%d", refCount);
-  }
+  dTrace("release qnode, refCount:%d", refCount);
 }
 
 static int32_t dndReadQnodeFile(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndSnode.c b/source/dnode/mgmt/impl/src/dndSnode.c
index ab4e38bfb2be82d1a1438dd7f8d7f203463955fd..00435d4c3e45a4433defc7fdb28260195748bf00 100644
--- a/source/dnode/mgmt/impl/src/dndSnode.c
+++ b/source/dnode/mgmt/impl/src/dndSnode.c
@@ -42,18 +42,13 @@ static SSnode *dndAcquireSnode(SDnode *pDnode) {
 }
 
 static void dndReleaseSnode(SDnode *pDnode, SSnode *pSnode) {
-  SSnodeMgmt *pMgmt = &pDnode->smgmt;
-  int32_t     refCount = 0;
+  if (pSnode == NULL) return;
 
+  SSnodeMgmt *pMgmt = &pDnode->smgmt;
   taosRLockLatch(&pMgmt->latch);
-  if (pSnode != NULL) {
-    refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
-  }
+  int32_t refCount = atomic_sub_fetch_32(&pMgmt->refCount, 1);
   taosRUnLockLatch(&pMgmt->latch);
-
-  if (pSnode != NULL) {
-    dTrace("release snode, refCount:%d", refCount);
-  }
+  dTrace("release snode, refCount:%d", refCount);
 }
 
 static int32_t dndReadSnodeFile(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndVnodes.c b/source/dnode/mgmt/impl/src/dndVnodes.c
index 6427ab080aaca2ed88d0dac3fd287d4c1770ea47..5198e351abed1980f745f5398e627a0facbc3b57 100644
--- a/source/dnode/mgmt/impl/src/dndVnodes.c
+++ b/source/dnode/mgmt/impl/src/dndVnodes.c
@@ -40,7 +40,7 @@ typedef struct {
   STaosQueue *pSyncQ;
   STaosQueue *pApplyQ;
   STaosQueue *pQueryQ;
-  STaosQueue* pFetchQ;
+  STaosQueue *pFetchQ;
 } SVnodeObj;
 
 typedef struct {
@@ -53,22 +53,8 @@ typedef struct {
   SWrapperCfg *pCfgs;
 } SVnodeThread;
 
-static int32_t dndInitVnodeReadWorker(SDnode *pDnode);
-static int32_t dndInitVnodeWriteWorker(SDnode *pDnode);
-static int32_t dndInitVnodeSyncWorker(SDnode *pDnode);
-static void    dndCleanupVnodeReadWorker(SDnode *pDnode);
-static void    dndCleanupVnodeWriteWorker(SDnode *pDnode);
-static void    dndCleanupVnodeSyncWorker(SDnode *pDnode);
-static int32_t dndAllocVnodeQueryQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static int32_t dndAllocVnodeFetchQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static int32_t dndAllocVnodeWriteQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static int32_t dndAllocVnodeApplyQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static int32_t dndAllocVnodeSyncQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static void    dndFreeVnodeQueryQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static void    dndFreeVnodeFetchQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static void    dndFreeVnodeWriteQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static void    dndFreeVnodeApplyQueue(SDnode *pDnode, SVnodeObj *pVnode);
-static void    dndFreeVnodeSyncQueue(SDnode *pDnode, SVnodeObj *pVnode);
+static int32_t dndAllocVnodeQueue(SDnode *pDnode, SVnodeObj *pVnode);
+static void    dndFreeVnodeQueue(SDnode *pDnode, SVnodeObj *pVnode);
 
 static void    dndProcessVnodeQueryQueue(SVnodeObj *pVnode, SRpcMsg *pMsg);
 static void    dndProcessVnodeFetchQueue(SVnodeObj *pVnode, SRpcMsg *pMsg);
@@ -117,11 +103,9 @@ static void dndReleaseVnode(SDnode *pDnode, SVnodeObj *pVnode) {
   if (pVnode == NULL) return;
 
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-
   taosRLockLatch(&pMgmt->latch);
   int32_t refCount = atomic_sub_fetch_32(&pVnode->refCount, 1);
   taosRUnLockLatch(&pMgmt->latch);
-
   dTrace("vgId:%d, release vnode, refCount:%d", pVnode->vgId, refCount);
 }
 
@@ -134,7 +118,7 @@ static int32_t dndOpenVnode(SDnode *pDnode, SWrapperCfg *pCfg, SVnode *pImpl) {
   }
 
   pVnode->vgId = pCfg->vgId;
-  pVnode->refCount = 1;
+  pVnode->refCount = 0;
   pVnode->dropped = 0;
   pVnode->accessState = TSDB_VN_ALL_ACCCESS;
   pVnode->pImpl = pImpl;
@@ -148,23 +132,8 @@ static int32_t dndOpenVnode(SDnode *pDnode, SWrapperCfg *pCfg, SVnode *pImpl) {
     return -1;
   }
 
-  if (dndAllocVnodeQueryQueue(pDnode, pVnode) != 0) {
-    return -1;
-  }
-
-  if (dndAllocVnodeFetchQueue(pDnode, pVnode) != 0) {
-    return -1;
-  }
-
-  if (dndAllocVnodeWriteQueue(pDnode, pVnode) != 0) {
-    return -1;
-  }
-
-  if (dndAllocVnodeApplyQueue(pDnode, pVnode) != 0) {
-    return -1;
-  }
-
-  if (dndAllocVnodeSyncQueue(pDnode, pVnode) != 0) {
+  if (dndAllocVnodeQueue(pDnode, pVnode) != 0) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
   }
 
@@ -192,12 +161,7 @@ static void dndCloseVnode(SDnode *pDnode, SVnodeObj *pVnode) {
   while (!taosQueueEmpty(pVnode->pQueryQ)) taosMsleep(10);
   while (!taosQueueEmpty(pVnode->pFetchQ)) taosMsleep(10);
 
-  dndFreeVnodeQueryQueue(pDnode, pVnode);
-  dndFreeVnodeFetchQueue(pDnode, pVnode);
-  dndFreeVnodeWriteQueue(pDnode, pVnode);
-  dndFreeVnodeApplyQueue(pDnode, pVnode);
-  dndFreeVnodeSyncQueue(pDnode, pVnode);
-  
+  dndFreeVnodeQueue(pDnode, pVnode);
   vnodeClose(pVnode->pImpl);
   pVnode->pImpl = NULL;
 
@@ -412,7 +376,10 @@ static void *dnodeOpenVnodeFunc(void *param) {
              pMgmt->openVnodes, pMgmt->totalVnodes);
     dndReportStartup(pDnode, "open-vnodes", stepDesc);
 
-    SVnode *pImpl = vnodeOpen(pCfg->path, NULL);
+    SVnodeCfg vnodeCfg = {0};
+    vnodeCfg.vgId = pCfg->vgId;
+
+    SVnode *pImpl = vnodeOpen(pCfg->path, &vnodeCfg);
     if (pImpl == NULL) {
       dError("vgId:%d, failed to open vnode by thread:%d", pCfg->vgId, pThread->threadIndex);
       pThread->failed++;
@@ -508,7 +475,6 @@ static void dndCloseVnodes(SDnode *pDnode) {
   SVnodeObj **pVnodes = dndGetVnodesFromHash(pDnode, &numOfVnodes);
 
   for (int32_t i = 0; i < numOfVnodes; ++i) {
-    dndReleaseVnode(pDnode, pVnodes[i]);
     dndCloseVnode(pDnode, pVnodes[i]);
   }
 
@@ -524,8 +490,8 @@ static void dndCloseVnodes(SDnode *pDnode) {
   dInfo("total vnodes:%d are all closed", numOfVnodes);
 }
 
-static SCreateVnodeMsg *dndParseCreateVnodeReq(SRpcMsg *rpcMsg) {
-  SCreateVnodeMsg *pCreate = rpcMsg->pCont;
+static SCreateVnodeReq *dndParseCreateVnodeReq(SRpcMsg *pReq) {
+  SCreateVnodeReq *pCreate = pReq->pCont;
   pCreate->vgId = htonl(pCreate->vgId);
   pCreate->dnodeId = htonl(pCreate->dnodeId);
   pCreate->dbUid = htobe64(pCreate->dbUid);
@@ -549,7 +515,8 @@ static SCreateVnodeMsg *dndParseCreateVnodeReq(SRpcMsg *rpcMsg) {
   return pCreate;
 }
 
-static void dndGenerateVnodeCfg(SCreateVnodeMsg *pCreate, SVnodeCfg *pCfg) {
+static void dndGenerateVnodeCfg(SCreateVnodeReq *pCreate, SVnodeCfg *pCfg) {
+  pCfg->vgId = pCreate->vgId;
   pCfg->wsize = pCreate->cacheBlockSize;
   pCfg->ssize = pCreate->cacheBlockSize;
   pCfg->wsize = pCreate->cacheBlockSize;
@@ -572,7 +539,7 @@ static void dndGenerateVnodeCfg(SCreateVnodeMsg *pCreate, SVnodeCfg *pCfg) {
   pCfg->walCfg.vgId = pCreate->vgId;
 }
 
-static void dndGenerateWrapperCfg(SDnode *pDnode, SCreateVnodeMsg *pCreate, SWrapperCfg *pCfg) {
+static void dndGenerateWrapperCfg(SDnode *pDnode, SCreateVnodeReq *pCreate, SWrapperCfg *pCfg) {
   memcpy(pCfg->db, pCreate->db, TSDB_DB_FNAME_LEN);
   pCfg->dbUid = pCreate->dbUid;
   pCfg->dropped = 0;
@@ -581,20 +548,20 @@ static void dndGenerateWrapperCfg(SDnode *pDnode, SCreateVnodeMsg *pCreate, SWra
   pCfg->vgVersion = pCreate->vgVersion;
 }
 
-static SDropVnodeMsg *vnodeParseDropVnodeReq(SRpcMsg *rpcMsg) {
-  SDropVnodeMsg *pDrop = rpcMsg->pCont;
+static SDropVnodeReq *vnodeParseDropVnodeReq(SRpcMsg *pReq) {
+  SDropVnodeReq *pDrop = pReq->pCont;
   pDrop->vgId = htonl(pDrop->vgId);
   return pDrop;
 }
 
-static SAuthVnodeMsg *vnodeParseAuthVnodeReq(SRpcMsg *rpcMsg) {
-  SAuthVnodeMsg *pAuth = rpcMsg->pCont;
+static SAuthVnodeReq *vnodeParseAuthVnodeReq(SRpcMsg *pReq) {
+  SAuthVnodeReq *pAuth = pReq->pCont;
   pAuth->vgId = htonl(pAuth->vgId);
   return pAuth;
 }
 
-int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
-  SCreateVnodeMsg *pCreate = dndParseCreateVnodeReq(rpcMsg);
+int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
+  SCreateVnodeReq *pCreate = dndParseCreateVnodeReq(pReq);
   dDebug("vgId:%d, create vnode req is received", pCreate->vgId);
 
   SVnodeCfg vnodeCfg = {0};
@@ -607,16 +574,19 @@ int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   if (pVnode != NULL) {
     dDebug("vgId:%d, already exist, return success", pCreate->vgId);
     dndReleaseVnode(pDnode, pVnode);
+    terrno = TSDB_CODE_DND_VNODE_ALREADY_DEPLOYED;
     return 0;
   }
 
-  SVnode *pImpl = vnodeOpen(wrapperCfg.path, NULL /*pCfg*/);
+  SVnode *pImpl = vnodeOpen(wrapperCfg.path, &vnodeCfg);
   if (pImpl == NULL) {
+    dError("vgId:%d, failed to create vnode since %s", pCreate->vgId, terrstr());
     return -1;
   }
 
   int32_t code = dndOpenVnode(pDnode, &wrapperCfg, pImpl);
   if (code != 0) {
+    dError("vgId:%d, failed to open vnode since %s", pCreate->vgId, terrstr());
     vnodeClose(pImpl);
     vnodeDestroy(wrapperCfg.path);
     terrno = code;
@@ -634,23 +604,20 @@ int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   return 0;
 }
 
-int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
-  SAlterVnodeMsg *pAlter = (SAlterVnodeMsg *)dndParseCreateVnodeReq(rpcMsg);
+int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
+  SAlterVnodeReq *pAlter = (SAlterVnodeReq *)dndParseCreateVnodeReq(pReq);
   dDebug("vgId:%d, alter vnode req is received", pAlter->vgId);
 
   SVnodeCfg vnodeCfg = {0};
   dndGenerateVnodeCfg(pAlter, &vnodeCfg);
 
-  SWrapperCfg wrapperCfg = {0};
-  dndGenerateWrapperCfg(pDnode, pAlter, &wrapperCfg);
-
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, pAlter->vgId);
   if (pVnode == NULL) {
     dDebug("vgId:%d, failed to alter vnode since %s", pAlter->vgId, terrstr());
-    return terrno;
+    return -1;
   }
 
-  if (wrapperCfg.vgVersion == pVnode->vgVersion) {
+  if (pAlter->vgVersion == pVnode->vgVersion) {
     dndReleaseVnode(pDnode, pVnode);
     dDebug("vgId:%d, no need to alter vnode cfg for version unchanged ", pAlter->vgId);
     return 0;
@@ -659,11 +626,11 @@ int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   if (vnodeAlter(pVnode->pImpl, &vnodeCfg) != 0) {
     dError("vgId:%d, failed to alter vnode since %s", pAlter->vgId, terrstr());
     dndReleaseVnode(pDnode, pVnode);
-    return terrno;
+    return -1;
   }
 
   int32_t oldVersion = pVnode->vgVersion;
-  pVnode->vgVersion = wrapperCfg.vgVersion;
+  pVnode->vgVersion = pAlter->vgVersion;
   int32_t code = dndWriteVnodesToFile(pDnode);
   if (code != 0) {
     pVnode->vgVersion = oldVersion;
@@ -673,8 +640,8 @@ int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   return code;
 }
 
-int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
-  SDropVnodeMsg *pDrop = vnodeParseDropVnodeReq(rpcMsg);
+int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
+  SDropVnodeReq *pDrop = vnodeParseDropVnodeReq(pReq);
 
   int32_t vgId = pDrop->vgId;
   dDebug("vgId:%d, drop vnode req is received", vgId);
@@ -688,10 +655,10 @@ int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   pVnode->dropped = 1;
   if (dndWriteVnodesToFile(pDnode) != 0) {
     pVnode->dropped = 0;
-    return terrno;
+    dndReleaseVnode(pDnode, pVnode);
+    return -1;
   }
 
-  dndReleaseVnode(pDnode, pVnode);
   dndCloseVnode(pDnode, pVnode);
   vnodeClose(pVnode->pImpl);
   vnodeDestroy(pVnode->path);
@@ -700,17 +667,16 @@ int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   return 0;
 }
 
-int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
-  SAuthVnodeMsg *pAuth = (SAuthVnodeMsg *)vnodeParseAuthVnodeReq(rpcMsg);
+int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
+  SAuthVnodeReq *pAuth = (SAuthVnodeReq *)vnodeParseAuthVnodeReq(pReq);
 
-  int32_t code = 0;
   int32_t vgId = pAuth->vgId;
   dDebug("vgId:%d, auth vnode req is received", vgId);
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
   if (pVnode == NULL) {
     dDebug("vgId:%d, failed to auth since %s", vgId, terrstr());
-    return terrno;
+    return -1;
   }
 
   pVnode->accessState = pAuth->accessState;
@@ -718,30 +684,30 @@ int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   return 0;
 }
 
-int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
-  SAuthVnodeMsg *pAuth = (SAuthVnodeMsg *)vnodeParseAuthVnodeReq(rpcMsg);
+int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
+  SSyncVnodeReq *pSync = (SSyncVnodeReq *)vnodeParseDropVnodeReq(pReq);
 
-  int32_t vgId = pAuth->vgId;
-  dDebug("vgId:%d, auth vnode req is received", vgId);
+  int32_t vgId = pSync->vgId;
+  dDebug("vgId:%d, sync vnode req is received", vgId);
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
   if (pVnode == NULL) {
-    dDebug("vgId:%d, failed to auth since %s", vgId, terrstr());
-    return terrno;
+    dDebug("vgId:%d, failed to sync since %s", vgId, terrstr());
+    return -1;
   }
 
   if (vnodeSync(pVnode->pImpl) != 0) {
-    dError("vgId:%d, failed to auth vnode since %s", vgId, terrstr());
+    dError("vgId:%d, failed to sync vnode since %s", vgId, terrstr());
     dndReleaseVnode(pDnode, pVnode);
-    return terrno;
+    return -1;
   }
 
   dndReleaseVnode(pDnode, pVnode);
   return 0;
 }
 
-int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
-  SCompactVnodeMsg *pCompact = (SCompactVnodeMsg *)vnodeParseDropVnodeReq(rpcMsg);
+int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
+  SCompactVnodeReq *pCompact = (SCompactVnodeReq *)vnodeParseDropVnodeReq(pReq);
 
   int32_t vgId = pCompact->vgId;
   dDebug("vgId:%d, compact vnode req is received", vgId);
@@ -749,13 +715,13 @@ int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *rpcMsg) {
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
   if (pVnode == NULL) {
     dDebug("vgId:%d, failed to compact since %s", vgId, terrstr());
-    return terrno;
+    return -1;
   }
 
   if (vnodeCompact(pVnode->pImpl) != 0) {
     dError("vgId:%d, failed to compact vnode since %s", vgId, terrstr());
     dndReleaseVnode(pDnode, pVnode);
-    return terrno;
+    return -1;
   }
 
   dndReleaseVnode(pDnode, pVnode);
@@ -814,6 +780,7 @@ static void dndProcessVnodeApplyQueue(SVnodeObj *pVnode, STaosQall *qall, int32_
   for (int32_t i = 0; i < numOfMsgs; ++i) {
     taosGetQitem(qall, (void **)&pMsg);
 
+    // todo
     SRpcMsg *pRsp = NULL;
     (void)vnodeApplyWMsg(pVnode->pImpl, pMsg, &pRsp);
   }
@@ -825,6 +792,7 @@ static void dndProcessVnodeSyncQueue(SVnodeObj *pVnode, STaosQall *qall, int32_t
   for (int32_t i = 0; i < numOfMsgs; ++i) {
     taosGetQitem(qall, (void **)&pMsg);
 
+    // todo
     SRpcMsg *pRsp = NULL;
     (void)vnodeProcessSyncReq(pVnode->pImpl, pMsg, &pRsp);
   }
@@ -848,21 +816,25 @@ static int32_t dndWriteRpcMsgToVnodeQueue(STaosQueue *pQueue, SRpcMsg *pRpcMsg)
   }
 
   if (code != TSDB_CODE_SUCCESS) {
-    SRpcMsg rsp = {.handle = pRpcMsg->handle, .code = code};
-    rpcSendResponse(&rsp);
+    if (pRpcMsg->msgType & 1u) {
+      SRpcMsg rsp = {.handle = pRpcMsg->handle, .code = code};
+      rpcSendResponse(&rsp);
+    }
     rpcFreeCont(pRpcMsg->pCont);
   }
 }
 
 static SVnodeObj *dndAcquireVnodeFromMsg(SDnode *pDnode, SRpcMsg *pMsg) {
-  SMsgHead *pHead = (SMsgHead *)pMsg->pCont;
+  SMsgHead *pHead = pMsg->pCont;
   pHead->contLen = htonl(pHead->contLen);
   pHead->vgId = htonl(pHead->vgId);
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, pHead->vgId);
   if (pVnode == NULL) {
-    SRpcMsg rsp = {.handle = pMsg->handle, .code = TSDB_CODE_VND_INVALID_VGROUP_ID};
-    rpcSendResponse(&rsp);
+    if (pMsg->msgType & 1u) {
+      SRpcMsg rsp = {.handle = pMsg->handle, .code = TSDB_CODE_VND_INVALID_VGROUP_ID};
+      rpcSendResponse(&rsp);
+    }
     rpcFreeCont(pMsg->pCont);
   }
 
@@ -903,142 +875,69 @@ void dndProcessVnodeFetchMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet) {
 
 static int32_t dndPutMsgIntoVnodeApplyQueue(SDnode *pDnode, int32_t vgId, SRpcMsg *pMsg) {
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
-  if (pVnode == NULL) {
-    return -1;
-  }
+  if (pVnode == NULL) return -1;
 
   int32_t code = taosWriteQitem(pVnode->pApplyQ, pMsg);
   dndReleaseVnode(pDnode, pVnode);
   return code;
 }
 
-static int32_t dndAllocVnodeQueryQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  pVnode->pQueryQ = tWorkerAllocQueue(&pMgmt->queryPool, pVnode, (FProcessItem)dndProcessVnodeQueryQueue);
-  if (pVnode->pQueryQ == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  return 0;
-}
-
-static void dndFreeVnodeQueryQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  tWorkerFreeQueue(&pMgmt->queryPool, pVnode->pQueryQ);
-  pVnode->pQueryQ = NULL;
-}
-
-static int32_t dndAllocVnodeFetchQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  pVnode->pFetchQ = tWorkerAllocQueue(&pMgmt->fetchPool, pVnode, (FProcessItem)dndProcessVnodeFetchQueue);
-  if (pVnode->pFetchQ == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  return 0;
-}
-
-static void dndFreeVnodeFetchQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  tWorkerFreeQueue(&pMgmt->fetchPool, pVnode->pFetchQ);
-  pVnode->pFetchQ = NULL;
-}
-
-static int32_t dndInitVnodeReadWorker(SDnode *pDnode) {
+static int32_t dndInitVnodeWorkers(SDnode *pDnode) {
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
 
   int32_t maxFetchThreads = 4;
-  float   threadsForQuery = MAX(pDnode->opt.numOfCores * pDnode->opt.ratioOfQueryCores, 1);
+  int32_t minFetchThreads = MIN(maxFetchThreads, pDnode->opt.numOfCores);
+  int32_t minQueryThreads = MAX((int32_t)(pDnode->opt.numOfCores * pDnode->opt.ratioOfQueryCores), 1);
+  int32_t maxQueryThreads = minQueryThreads;
+  int32_t maxWriteThreads = MAX(pDnode->opt.numOfCores, 1);
+  int32_t maxSyncThreads = MAX(pDnode->opt.numOfCores / 2, 1);
 
   SWorkerPool *pPool = &pMgmt->queryPool;
   pPool->name = "vnode-query";
-  pPool->min = (int32_t)threadsForQuery;
-  pPool->max = pPool->min;
-  if (tWorkerInit(pPool) != 0) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
+  pPool->min = minQueryThreads;
+  pPool->max = maxQueryThreads;
+  if (tWorkerInit(pPool) != 0) return -1;
 
   pPool = &pMgmt->fetchPool;
   pPool->name = "vnode-fetch";
-  pPool->min = MIN(maxFetchThreads, pDnode->opt.numOfCores);
-  pPool->max = pPool->min;
-  if (tWorkerInit(pPool) != 0) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
+  pPool->min = minFetchThreads;
+  pPool->max = maxFetchThreads;
+  if (tWorkerInit(pPool) != 0) return -1;
+
+  SMWorkerPool *pMPool = &pMgmt->writePool;
+  pMPool->name = "vnode-write";
+  pMPool->max = maxWriteThreads;
+  if (tMWorkerInit(pMPool) != 0) return -1;
 
-  dDebug("vnode read worker is initialized");
+  pMPool = &pMgmt->syncPool;
+  pMPool->name = "vnode-sync";
+  pMPool->max = maxSyncThreads;
+  if (tMWorkerInit(pMPool) != 0) return -1;
+
+  dDebug("vnode workers is initialized");
   return 0;
 }
 
-static void dndCleanupVnodeReadWorker(SDnode *pDnode) {
+static void dndCleanupVnodeWorkers(SDnode *pDnode) {
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
   tWorkerCleanup(&pMgmt->fetchPool);
   tWorkerCleanup(&pMgmt->queryPool);
-  dDebug("vnode close worker is initialized");
-}
-
-static int32_t dndAllocVnodeWriteQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  pVnode->pWriteQ = tMWorkerAllocQueue(&pMgmt->writePool, pVnode, (FProcessItems)dndProcessVnodeWriteQueue);
-  if (pVnode->pWriteQ == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  return 0;
+  tMWorkerCleanup(&pMgmt->writePool);
+  tMWorkerCleanup(&pMgmt->syncPool);
+  dDebug("vnode workers is closed");
 }
 
-static void dndFreeVnodeWriteQueue(SDnode *pDnode, SVnodeObj *pVnode) {
+static int32_t dndAllocVnodeQueue(SDnode *pDnode, SVnodeObj *pVnode) {
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  tMWorkerFreeQueue(&pMgmt->writePool, pVnode->pWriteQ);
-  pVnode->pWriteQ = NULL;
-}
 
-static int32_t dndAllocVnodeApplyQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
+  pVnode->pWriteQ = tMWorkerAllocQueue(&pMgmt->writePool, pVnode, (FProcessItems)dndProcessVnodeWriteQueue);
   pVnode->pApplyQ = tMWorkerAllocQueue(&pMgmt->writePool, pVnode, (FProcessItems)dndProcessVnodeApplyQueue);
-  if (pVnode->pApplyQ == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  return 0;
-}
-
-static void dndFreeVnodeApplyQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  tMWorkerFreeQueue(&pMgmt->writePool, pVnode->pApplyQ);
-  pVnode->pApplyQ = NULL;
-}
-
-static int32_t dndInitVnodeWriteWorker(SDnode *pDnode) {
-  SVnodesMgmt  *pMgmt = &pDnode->vmgmt;
-  SMWorkerPool *pPool = &pMgmt->writePool;
-  pPool->name = "vnode-write";
-  pPool->max = pDnode->opt.numOfCores;
-  if (tMWorkerInit(pPool) != 0) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  dDebug("vnode write worker is initialized");
-  return 0;
-}
-
-static void dndCleanupVnodeWriteWorker(SDnode *pDnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  tMWorkerCleanup(&pMgmt->writePool);
-  dDebug("vnode write worker is closed");
-}
-
-static int32_t dndAllocVnodeSyncQueue(SDnode *pDnode, SVnodeObj *pVnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
   pVnode->pSyncQ = tMWorkerAllocQueue(&pMgmt->syncPool, pVnode, (FProcessItems)dndProcessVnodeSyncQueue);
-  if (pVnode->pSyncQ == NULL) {
+  pVnode->pFetchQ = tWorkerAllocQueue(&pMgmt->fetchPool, pVnode, (FProcessItem)dndProcessVnodeFetchQueue);
+  pVnode->pQueryQ = tWorkerAllocQueue(&pMgmt->queryPool, pVnode, (FProcessItem)dndProcessVnodeQueryQueue);
+
+  if (pVnode->pApplyQ == NULL || pVnode->pWriteQ == NULL || pVnode->pSyncQ == NULL || pVnode->pFetchQ == NULL ||
+      pVnode->pQueryQ == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
   }
@@ -1046,50 +945,26 @@ static int32_t dndAllocVnodeSyncQueue(SDnode *pDnode, SVnodeObj *pVnode) {
   return 0;
 }
 
-static void dndFreeVnodeSyncQueue(SDnode *pDnode, SVnodeObj *pVnode) {
+static void dndFreeVnodeQueue(SDnode *pDnode, SVnodeObj *pVnode) {
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
+  tWorkerFreeQueue(&pMgmt->queryPool, pVnode->pQueryQ);
+  tWorkerFreeQueue(&pMgmt->fetchPool, pVnode->pFetchQ);
+  tMWorkerFreeQueue(&pMgmt->writePool, pVnode->pWriteQ);
+  tMWorkerFreeQueue(&pMgmt->writePool, pVnode->pApplyQ);
   tMWorkerFreeQueue(&pMgmt->syncPool, pVnode->pSyncQ);
+  pVnode->pWriteQ = NULL;
+  pVnode->pApplyQ = NULL;
   pVnode->pSyncQ = NULL;
-}
-
-static int32_t dndInitVnodeSyncWorker(SDnode *pDnode) {
-  int32_t maxThreads = pDnode->opt.numOfCores / 2;
-  if (maxThreads < 1) maxThreads = 1;
-
-  SVnodesMgmt  *pMgmt = &pDnode->vmgmt;
-  SMWorkerPool *pPool = &pMgmt->syncPool;
-  pPool->name = "vnode-sync";
-  pPool->max = maxThreads;
-  if (tMWorkerInit(pPool) != 0) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  dDebug("vnode sync worker is initialized");
-  return 0;
-}
-
-static void dndCleanupVnodeSyncWorker(SDnode *pDnode) {
-  SVnodesMgmt *pMgmt = &pDnode->vmgmt;
-  tMWorkerCleanup(&pMgmt->syncPool);
-  dDebug("vnode sync worker is closed");
+  pVnode->pFetchQ = NULL;
+  pVnode->pQueryQ = NULL;
 }
 
 int32_t dndInitVnodes(SDnode *pDnode) {
   dInfo("dnode-vnodes start to init");
 
-  if (dndInitVnodeReadWorker(pDnode) != 0) {
-    dError("failed to init vnodes read worker since %s", terrstr());
-    return -1;
-  }
-
-  if (dndInitVnodeWriteWorker(pDnode) != 0) {
-    dError("failed to init vnodes write worker since %s", terrstr());
-    return -1;
-  }
-
-  if (dndInitVnodeSyncWorker(pDnode) != 0) {
-    dError("failed to init vnodes sync worker since %s", terrstr());
+  if (dndInitVnodeWorkers(pDnode) != 0) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    dError("failed to init vnode workers since %s", terrstr());
     return -1;
   }
 
@@ -1105,9 +980,7 @@ int32_t dndInitVnodes(SDnode *pDnode) {
 void dndCleanupVnodes(SDnode *pDnode) {
   dInfo("dnode-vnodes start to clean up");
   dndCloseVnodes(pDnode);
-  dndCleanupVnodeReadWorker(pDnode);
-  dndCleanupVnodeWriteWorker(pDnode);
-  dndCleanupVnodeSyncWorker(pDnode);
+  dndCleanupVnodeWorkers(pDnode);
   dInfo("dnode-vnodes is cleaned up");
 }
 
diff --git a/source/dnode/mgmt/impl/test/CMakeLists.txt b/source/dnode/mgmt/impl/test/CMakeLists.txt
index 8f721dae9a5433f272352204bbbc776e525f9c80..ce93a14d3fc30e6d22877e28a4d04f4e3618a349 100644
--- a/source/dnode/mgmt/impl/test/CMakeLists.txt
+++ b/source/dnode/mgmt/impl/test/CMakeLists.txt
@@ -4,8 +4,5 @@ add_subdirectory(qnode)
 add_subdirectory(bnode)
 add_subdirectory(snode)
 add_subdirectory(mnode)
-add_subdirectory(db)
-add_subdirectory(stb)
-add_subdirectory(vgroup)
-
+add_subdirectory(vnode)
 add_subdirectory(sut)
diff --git a/source/dnode/mgmt/impl/test/db/CMakeLists.txt b/source/dnode/mgmt/impl/test/db/CMakeLists.txt
deleted file mode 100644
index cb9f1600fc2a76951a5cb81cf94c5d1ef48d5eb1..0000000000000000000000000000000000000000
--- a/source/dnode/mgmt/impl/test/db/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-aux_source_directory(. DB_SRC)
-add_executable(dnode_test_db ${DB_SRC})
-target_link_libraries(
-    dnode_test_db
-    PUBLIC sut
-)
-
-add_test(
-    NAME dnode_test_db
-    COMMAND dnode_test_db
-)
diff --git a/source/dnode/mgmt/impl/test/vgroup/CMakeLists.txt b/source/dnode/mgmt/impl/test/vgroup/CMakeLists.txt
deleted file mode 100644
index b864b0593c26d15c4468c381f95c1ac337e1174f..0000000000000000000000000000000000000000
--- a/source/dnode/mgmt/impl/test/vgroup/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-aux_source_directory(. VGROUP_SRC)
-add_executable(dnode_test_vgroup ${VGROUP_SRC})
-target_link_libraries(
-    dnode_test_vgroup
-    PUBLIC sut
-)
-
-add_test(
-    NAME dnode_test_vgroup
-    COMMAND dnode_test_vgroup
-)
diff --git a/source/dnode/mgmt/impl/test/vnode/CMakeLists.txt b/source/dnode/mgmt/impl/test/vnode/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6fb8bb4ba4a599ecad81314c86ff061442a768d3
--- /dev/null
+++ b/source/dnode/mgmt/impl/test/vnode/CMakeLists.txt
@@ -0,0 +1,11 @@
+aux_source_directory(. VNODE_SRC)
+add_executable(dnode_test_vnode ${VNODE_SRC})
+target_link_libraries(
+    dnode_test_vnode
+    PUBLIC sut
+)
+
+add_test(
+    NAME dnode_test_vnode
+    COMMAND dnode_test_vnode
+)
diff --git a/source/dnode/mgmt/impl/test/vgroup/vgroup.cpp b/source/dnode/mgmt/impl/test/vnode/vnode.cpp
similarity index 83%
rename from source/dnode/mgmt/impl/test/vgroup/vgroup.cpp
rename to source/dnode/mgmt/impl/test/vnode/vnode.cpp
index 7fa3b4ab6167b29a7eb63cbd2391fecc9e657700..72331371402fd88e6d6e3c80bae536468ac83a45 100644
--- a/source/dnode/mgmt/impl/test/vgroup/vgroup.cpp
+++ b/source/dnode/mgmt/impl/test/vnode/vnode.cpp
@@ -11,9 +11,9 @@
 
 #include "sut.h"
 
-class DndTestVgroup : public ::testing::Test {
+class DndTestVnode : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_vgroup", 9150); }
+  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_vnode", 9150); }
   static void TearDownTestSuite() { test.Cleanup(); }
 
   static Testbase test;
@@ -23,14 +23,14 @@ class DndTestVgroup : public ::testing::Test {
   void TearDown() override {}
 };
 
-Testbase DndTestVgroup::test;
+Testbase DndTestVnode::test;
 
-TEST_F(DndTestVgroup, 01_Create_Restart_Drop_Vnode) {
+TEST_F(DndTestVnode, 01_Create_Restart_Drop_Vnode) {
   {
     for (int i = 0; i < 3; ++i) {
-      int32_t contLen = sizeof(SCreateVnodeMsg);
+      int32_t contLen = sizeof(SCreateVnodeReq);
 
-      SCreateVnodeMsg* pReq = (SCreateVnodeMsg*)rpcMallocCont(contLen);
+      SCreateVnodeReq* pReq = (SCreateVnodeReq*)rpcMallocCont(contLen);
       pReq->vgId = htonl(2);
       pReq->dnodeId = htonl(1);
       strcpy(pReq->db, "1.d1");
@@ -68,9 +68,9 @@ TEST_F(DndTestVgroup, 01_Create_Restart_Drop_Vnode) {
 
   {
     for (int i = 0; i < 3; ++i) {
-      int32_t contLen = sizeof(SAlterVnodeMsg);
+      int32_t contLen = sizeof(SAlterVnodeReq);
 
-      SAlterVnodeMsg* pReq = (SAlterVnodeMsg*)rpcMallocCont(contLen);
+      SAlterVnodeReq* pReq = (SAlterVnodeReq*)rpcMallocCont(contLen);
       pReq->vgId = htonl(2);
       pReq->dnodeId = htonl(1);
       strcpy(pReq->db, "1.d1");
@@ -108,9 +108,9 @@ TEST_F(DndTestVgroup, 01_Create_Restart_Drop_Vnode) {
 
   {
     for (int i = 0; i < 3; ++i) {
-      int32_t contLen = sizeof(SDropVnodeMsg);
+      int32_t contLen = sizeof(SDropVnodeReq);
 
-      SDropVnodeMsg* pReq = (SDropVnodeMsg*)rpcMallocCont(contLen);
+      SDropVnodeReq* pReq = (SDropVnodeReq*)rpcMallocCont(contLen);
       pReq->vgId = htonl(2);
       pReq->dnodeId = htonl(1);
       strcpy(pReq->db, "1.d1");
@@ -118,7 +118,7 @@ TEST_F(DndTestVgroup, 01_Create_Restart_Drop_Vnode) {
 
       SRpcMsg rpcMsg = {0};
       rpcMsg.pCont = pReq;
-      rpcMsg.contLen = sizeof(SDropVnodeMsg);
+      rpcMsg.contLen = sizeof(SDropVnodeReq);
       rpcMsg.msgType = TDMT_DND_DROP_VNODE;
 
       SRpcMsg* pRsp = test.SendReq(TDMT_DND_DROP_VNODE, pReq, contLen);
diff --git a/source/dnode/mnode/impl/inc/mndVgroup.h b/source/dnode/mnode/impl/inc/mndVgroup.h
index 6d391450b7c37833e8382c850f7f28ec0132d7e7..9e4656fec812a1d1c1a2c13ab6bc1f4870397e80 100644
--- a/source/dnode/mnode/impl/inc/mndVgroup.h
+++ b/source/dnode/mnode/impl/inc/mndVgroup.h
@@ -31,8 +31,8 @@ int32_t  mndAllocVgroup(SMnode *pMnode, SDbObj *pDb, SVgObj **ppVgroups);
 SEpSet   mndGetVgroupEpset(SMnode *pMnode, SVgObj *pVgroup);
 int32_t  mndGetVnodesNum(SMnode *pMnode, int32_t dnodeId);
 
-SCreateVnodeMsg *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
-SDropVnodeMsg   *mndBuildDropVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
+SCreateVnodeReq *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
+SDropVnodeReq   *mndBuildDropVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mnode/impl/src/mndDb.c b/source/dnode/mnode/impl/src/mndDb.c
index 251cbb921786eed7e5ddb4f417cbf8f37c985515..bf5d01d0a261ef4d392c651e7ea1c969a6acd8a2 100644
--- a/source/dnode/mnode/impl/src/mndDb.c
+++ b/source/dnode/mnode/impl/src/mndDb.c
@@ -331,11 +331,11 @@ static int32_t mndSetCreateDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj
       action.epSet = mndGetDnodeEpset(pDnode);
       mndReleaseDnode(pMnode, pDnode);
 
-      SCreateVnodeMsg *pMsg = mndBuildCreateVnodeMsg(pMnode, pDnode, pDb, pVgroup);
+      SCreateVnodeReq *pMsg = mndBuildCreateVnodeMsg(pMnode, pDnode, pDb, pVgroup);
       if (pMsg == NULL) return -1;
 
       action.pCont = pMsg;
-      action.contLen = sizeof(SCreateVnodeMsg);
+      action.contLen = sizeof(SCreateVnodeReq);
       action.msgType = TDMT_DND_CREATE_VNODE;
       if (mndTransAppendRedoAction(pTrans, &action) != 0) {
         free(pMsg);
@@ -360,11 +360,11 @@ static int32_t mndSetCreateDbUndoActions(SMnode *pMnode, STrans *pTrans, SDbObj
       action.epSet = mndGetDnodeEpset(pDnode);
       mndReleaseDnode(pMnode, pDnode);
 
-      SDropVnodeMsg *pMsg = mndBuildDropVnodeMsg(pMnode, pDnode, pDb, pVgroup);
+      SDropVnodeReq *pMsg = mndBuildDropVnodeMsg(pMnode, pDnode, pDb, pVgroup);
       if (pMsg == NULL) return -1;
 
       action.pCont = pMsg;
-      action.contLen = sizeof(SDropVnodeMsg);
+      action.contLen = sizeof(SDropVnodeReq);
       action.msgType = TDMT_DND_DROP_VNODE;
       if (mndTransAppendUndoAction(pTrans, &action) != 0) {
         free(pMsg);
@@ -593,11 +593,11 @@ static int32_t mndBuildUpdateVgroupAction(SMnode *pMnode, STrans *pTrans, SDbObj
     action.epSet = mndGetDnodeEpset(pDnode);
     mndReleaseDnode(pMnode, pDnode);
 
-    SAlterVnodeMsg *pMsg = (SAlterVnodeMsg *)mndBuildCreateVnodeMsg(pMnode, pDnode, pDb, pVgroup);
+    SAlterVnodeReq *pMsg = (SAlterVnodeReq *)mndBuildCreateVnodeMsg(pMnode, pDnode, pDb, pVgroup);
     if (pMsg == NULL) return -1;
 
     action.pCont = pMsg;
-    action.contLen = sizeof(SAlterVnodeMsg);
+    action.contLen = sizeof(SAlterVnodeReq);
     action.msgType = TDMT_DND_ALTER_VNODE;
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
       free(pMsg);
@@ -757,11 +757,11 @@ static int32_t mndBuildDropVgroupAction(SMnode *pMnode, STrans *pTrans, SDbObj *
     action.epSet = mndGetDnodeEpset(pDnode);
     mndReleaseDnode(pMnode, pDnode);
 
-    SDropVnodeMsg *pMsg = mndBuildDropVnodeMsg(pMnode, pDnode, pDb, pVgroup);
+    SDropVnodeReq *pMsg = mndBuildDropVnodeMsg(pMnode, pDnode, pDb, pVgroup);
     if (pMsg == NULL) return -1;
 
     action.pCont = pMsg;
-    action.contLen = sizeof(SCreateVnodeMsg);
+    action.contLen = sizeof(SCreateVnodeReq);
     action.msgType = TDMT_DND_DROP_VNODE;
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
       free(pMsg);
diff --git a/source/dnode/mnode/impl/src/mndVgroup.c b/source/dnode/mnode/impl/src/mndVgroup.c
index bd17c6d15077ad0f303a1096e0bcf39b10eb021c..e9d35a6e4c82e14801abec69850c92b42805184b 100644
--- a/source/dnode/mnode/impl/src/mndVgroup.c
+++ b/source/dnode/mnode/impl/src/mndVgroup.c
@@ -189,8 +189,8 @@ void mndReleaseVgroup(SMnode *pMnode, SVgObj *pVgroup) {
   sdbRelease(pSdb, pVgroup);
 }
 
-SCreateVnodeMsg *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
-  SCreateVnodeMsg *pCreate = calloc(1, sizeof(SCreateVnodeMsg));
+SCreateVnodeReq *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
+  SCreateVnodeReq *pCreate = calloc(1, sizeof(SCreateVnodeReq));
   if (pCreate == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return NULL;
@@ -248,8 +248,8 @@ SCreateVnodeMsg *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbOb
   return pCreate;
 }
 
-SDropVnodeMsg *mndBuildDropVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
-  SDropVnodeMsg *pDrop = calloc(1, sizeof(SDropVnodeMsg));
+SDropVnodeReq *mndBuildDropVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
+  SDropVnodeReq *pDrop = calloc(1, sizeof(SDropVnodeReq));
   if (pDrop == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return NULL;
diff --git a/source/dnode/mnode/impl/test/CMakeLists.txt b/source/dnode/mnode/impl/test/CMakeLists.txt
index 4d37bb368d678fc589a97f472a9915467f73a6ce..3ca35d58a7cf8bbfdf29aac97390f8cf815f397f 100644
--- a/source/dnode/mnode/impl/test/CMakeLists.txt
+++ b/source/dnode/mnode/impl/test/CMakeLists.txt
@@ -10,3 +10,5 @@ add_subdirectory(show)
 add_subdirectory(profile)
 add_subdirectory(dnode)
 add_subdirectory(mnode)
+add_subdirectory(db)
+add_subdirectory(stb)
diff --git a/source/dnode/mnode/impl/test/db/CMakeLists.txt b/source/dnode/mnode/impl/test/db/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f0abdf152cd5b081506a40d2f3b524560b47505c
--- /dev/null
+++ b/source/dnode/mnode/impl/test/db/CMakeLists.txt
@@ -0,0 +1,11 @@
+aux_source_directory(. DB_SRC)
+add_executable(mnode_test_db ${DB_SRC})
+target_link_libraries(
+    mnode_test_db
+    PUBLIC sut
+)
+
+add_test(
+    NAME mnode_test_db
+    COMMAND mnode_test_db
+)
diff --git a/source/dnode/mgmt/impl/test/db/db.cpp b/source/dnode/mnode/impl/test/db/db.cpp
similarity index 95%
rename from source/dnode/mgmt/impl/test/db/db.cpp
rename to source/dnode/mnode/impl/test/db/db.cpp
index 3a69ae23054f3e44df87bbf1d07f562ad05f97c7..42cf753c7cc128480cce5c028f8b5c55d6e20eba 100644
--- a/source/dnode/mgmt/impl/test/db/db.cpp
+++ b/source/dnode/mnode/impl/test/db/db.cpp
@@ -1,19 +1,19 @@
 /**
  * @file db.cpp
  * @author slguan (slguan@taosdata.com)
- * @brief DNODE module db-msg tests
- * @version 0.1
- * @date 2021-12-15
+ * @brief MNODE module db tests
+ * @version 1.0
+ * @date 2022-01-11
  *
- * @copyright Copyright (c) 2021
+ * @copyright Copyright (c) 2022
  *
  */
 
 #include "sut.h"
 
-class DndTestDb : public ::testing::Test {
+class MndTestDb : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_db", 9040); }
+  static void SetUpTestSuite() { test.Init("/tmp/mnode_test_db", 9030); }
   static void TearDownTestSuite() { test.Cleanup(); }
 
   static Testbase test;
@@ -23,9 +23,9 @@ class DndTestDb : public ::testing::Test {
   void TearDown() override {}
 };
 
-Testbase DndTestDb::test;
+Testbase MndTestDb::test;
 
-TEST_F(DndTestDb, 01_ShowDb) {
+TEST_F(MndTestDb, 01_ShowDb) {
   test.SendShowMetaReq(TSDB_MGMT_TABLE_DB, "");
   CHECK_META("show databases", 18);
   CHECK_SCHEMA(0, TSDB_DATA_TYPE_BINARY, TSDB_DB_NAME_LEN - 1 + VARSTR_HEADER_SIZE, "name");
@@ -51,7 +51,7 @@ TEST_F(DndTestDb, 01_ShowDb) {
   EXPECT_EQ(test.GetShowRows(), 0);
 }
 
-TEST_F(DndTestDb, 02_Create_Alter_Drop_Db) {
+TEST_F(MndTestDb, 02_Create_Alter_Drop_Db) {
   {
     int32_t contLen = sizeof(SCreateDbMsg);
 
@@ -211,7 +211,7 @@ TEST_F(DndTestDb, 02_Create_Alter_Drop_Db) {
   EXPECT_EQ(test.GetShowRows(), 0);
 }
 
-TEST_F(DndTestDb, 03_Create_Use_Restart_Use_Db) {
+TEST_F(MndTestDb, 03_Create_Use_Restart_Use_Db) {
   {
     int32_t contLen = sizeof(SCreateDbMsg);
 
@@ -281,7 +281,7 @@ TEST_F(DndTestDb, 03_Create_Use_Restart_Use_Db) {
       EXPECT_EQ(pInfo->numOfEps, 1);
       SEpAddrMsg* pAddr = &pInfo->epAddr[0];
       pAddr->port = htons(pAddr->port);
-      EXPECT_EQ(pAddr->port, 9040);
+      EXPECT_EQ(pAddr->port, 9030);
       EXPECT_STREQ(pAddr->fqdn, "localhost");
     }
 
@@ -297,7 +297,7 @@ TEST_F(DndTestDb, 03_Create_Use_Restart_Use_Db) {
       EXPECT_EQ(pInfo->numOfEps, 1);
       SEpAddrMsg* pAddr = &pInfo->epAddr[0];
       pAddr->port = htons(pAddr->port);
-      EXPECT_EQ(pAddr->port, 9040);
+      EXPECT_EQ(pAddr->port, 9030);
       EXPECT_STREQ(pAddr->fqdn, "localhost");
     }
   }
diff --git a/source/dnode/mgmt/impl/test/stb/CMakeLists.txt b/source/dnode/mnode/impl/test/stb/CMakeLists.txt
similarity index 100%
rename from source/dnode/mgmt/impl/test/stb/CMakeLists.txt
rename to source/dnode/mnode/impl/test/stb/CMakeLists.txt
diff --git a/source/dnode/mgmt/impl/test/stb/stb.cpp b/source/dnode/mnode/impl/test/stb/stb.cpp
similarity index 95%
rename from source/dnode/mgmt/impl/test/stb/stb.cpp
rename to source/dnode/mnode/impl/test/stb/stb.cpp
index d3362c7a9bc7df3fce5a591e76fbf6da692f6119..55cc0301229465b64282feba41643f13b90b398d 100644
--- a/source/dnode/mgmt/impl/test/stb/stb.cpp
+++ b/source/dnode/mnode/impl/test/stb/stb.cpp
@@ -1,19 +1,19 @@
 /**
  * @file stb.cpp
  * @author slguan (slguan@taosdata.com)
- * @brief DNODE module db-msg tests
- * @version 0.1
- * @date 2021-12-17
+ * @brief MNODE module stb tests
+ * @version 1.0
+ * @date 2022-01-12
  *
- * @copyright Copyright (c) 2021
+ * @copyright Copyright (c) 2022
  *
  */
 
 #include "sut.h"
 
-class DndTestStb : public ::testing::Test {
+class MndTestStb : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_stb", 9101); }
+  static void SetUpTestSuite() { test.Init("/tmp/mnode_test_stb", 9034); }
   static void TearDownTestSuite() { test.Cleanup(); }
 
   static Testbase test;
@@ -23,9 +23,9 @@ class DndTestStb : public ::testing::Test {
   void TearDown() override {}
 };
 
-Testbase DndTestStb::test;
+Testbase MndTestStb::test;
 
-TEST_F(DndTestStb, 01_Create_Show_Meta_Drop_Restart_Stb) {
+TEST_F(MndTestStb, 01_Create_Show_Meta_Drop_Restart_Stb) {
   {
     int32_t contLen = sizeof(SCreateDbMsg);
 
diff --git a/source/dnode/vnode/impl/src/vnodeMain.c b/source/dnode/vnode/impl/src/vnodeMain.c
index 88175646ae95739860fce867a0408b80e356f168..995bed6e0bedeccc6d2d5aaf8776e7aaa2271fa9 100644
--- a/source/dnode/vnode/impl/src/vnodeMain.c
+++ b/source/dnode/vnode/impl/src/vnodeMain.c
@@ -24,9 +24,9 @@ SVnode *vnodeOpen(const char *path, const SVnodeCfg *pVnodeCfg) {
   SVnode *pVnode = NULL;
 
   // Set default options
-  if (pVnodeCfg == NULL) {
+  //if (pVnodeCfg == NULL) {
     pVnodeCfg = &defaultVnodeOptions;
-  }
+  //}
 
   // Validate options
   if (vnodeValidateOptions(pVnodeCfg) < 0) {
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index eaaaf282970370ba4e44da43f70f766cf0b3cb2b..3ea564722b12353f896d823e2d24947819519130 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -277,9 +277,12 @@ TAOS_DEFINE_ERROR(TSDB_CODE_DND_BNODE_NOT_DEPLOYED,       "Bnode not deployed")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_BNODE_INVALID_OPTION,     "Bnode option invalid")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_BNODE_READ_FILE_ERROR,    "Read bnode.json error")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_BNODE_WRITE_FILE_ERROR,   "Write bnode.json error")
-TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_TOO_MANY_VNODES,    "Too many vnode directories")
+TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_ALREADY_DEPLOYED,   "Vnode already deployed")
+TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_NOT_DEPLOYED,       "Vnode not deployed")
+TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_INVALID_OPTION,     "Vnode option invalid")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_READ_FILE_ERROR,    "Read vnodes.json error")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_WRITE_FILE_ERROR,   "Write vnodes.json error")
+TAOS_DEFINE_ERROR(TSDB_CODE_DND_VNODE_TOO_MANY_VNODES,    "Too many vnodes")
 
 // vnode
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_ACTION_IN_PROGRESS,       "Action in progress")