diff --git a/source/dnode/mgmt/container/inc/dndInt.h b/source/dnode/mgmt/container/inc/dndInt.h
index 5193c8bb3b..b45827fce6 100644
--- a/source/dnode/mgmt/container/inc/dndInt.h
+++ b/source/dnode/mgmt/container/inc/dndInt.h
@@ -61,18 +61,17 @@ typedef enum { DND_STAT_INIT, DND_STAT_RUNNING, DND_STAT_STOPPED } EDndStatus;
 typedef enum { DND_WORKER_SINGLE, DND_WORKER_MULTI } EWorkerType;
 typedef enum { DND_ENV_INIT, DND_ENV_READY, DND_ENV_CLEANUP } EEnvStat;
 
+typedef struct SDnodeMgmt SDnodeMgmt;
+
 typedef struct SMgmtFp      SMgmtFp;
 typedef struct SMgmtWrapper SMgmtWrapper;
 typedef struct SMsgHandle   SMsgHandle;
+
 typedef void (*RpcMsgFp)(SDnode *pDnode, SMgmtWrapper *pWrapper, SRpcMsg *pMsg, SEpSet *pEps);
 typedef void (*NodeMsgFp)(SDnode *pDnode, SMgmtWrapper *pWrapper, SNodeMsg *pMsg);
-
-
-typedef int32_t (*MndMsgFp)(SDnode *pDnode, SMndMsg *pMsg);
 typedef int32_t (*OpenNodeFp)(SMgmtWrapper *pWrapper);
-typedef void (*CloseNodeFp)(SDnode *pDnode, SMgmtWrapper *pWrapper);
+typedef void (*CloseNodeFp)(SMgmtWrapper *pWrapper);
 typedef bool (*RequireNodeFp)(SMgmtWrapper *pWrapper);
-typedef int32_t (*MgmtHandleMsgFp)(SMgmtWrapper *pNode, SNodeMsg *pMsg);
 typedef SMsgHandle (*GetMsgHandleFp)(SMgmtWrapper *pWrapper, int32_t msgIndex);
 
 typedef struct SMsgHandle {
@@ -95,25 +94,6 @@ typedef struct {
   };
 } SDnodeWorker;
 
-typedef struct {
-  int32_t      dnodeId;
-  int32_t      dropped;
-  int64_t      clusterId;
-  int64_t      dver;
-  int64_t      rebootTime;
-  int64_t      updateTime;
-  int8_t       statusSent;
-  SEpSet       mnodeEpSet;
-  SHashObj    *dnodeHash;
-  SArray      *pDnodeEps;
-  pthread_t   *threadId;
-  SRWLatch     latch;
-  SDnodeWorker mgmtWorker;
-  SDnodeWorker statusWorker;
-
-  //
-  SMsgHandle msgHandles[TDMT_MAX];
-} SDnodeMgmt;
 
 typedef struct {
   int32_t      refCount;
@@ -223,8 +203,8 @@ typedef struct SMgmtWrapper {
   EProcType   procType;
   SProcObj   *pProc;
   void       *pMgmt;
-  SMgmtFp     fp;
   SDnode     *pDnode;
+  SMgmtFp     fp;
 } SMgmtWrapper;
 
 typedef struct SDnode {
@@ -234,12 +214,10 @@ typedef struct SDnode {
   SDndCfg      cfg;
   SStartupReq  startup;
   TdFilePtr    pLockFile;
-  SDnodeMgmt   dmgmt;
   STransMgmt   tmgmt;
   STfs        *pTfs;
   SMgmtFp      fps[NODE_MAX];
   SMgmtWrapper wrappers[NODE_MAX];
-  char        *path;
 } SDnode;
 
 EDndStatus  dndGetStatus(SDnode *pDnode);
diff --git a/source/dnode/mgmt/container/inc/dndTransport.h b/source/dnode/mgmt/container/inc/dndTransport.h
index 1a925ee923..892dea6eb2 100644
--- a/source/dnode/mgmt/container/inc/dndTransport.h
+++ b/source/dnode/mgmt/container/inc/dndTransport.h
@@ -22,10 +22,11 @@
 extern "C" {
 #endif
 
-int32_t dndInitTrans(SDnode *pDnode);
-void    dndCleanupTrans(SDnode *pDnode);
 int32_t dndInitServer(SDnode *pDnode);
+void    dndCleanupServer(SDnode *pDnode);
 int32_t dndInitClient(SDnode *pDnode);
+void    dndCleanupClient(SDnode *pDnode);
+int32_t dndSetMsgHandle(SDnode *pDnode);
 
 int32_t dndSendReqToMnode(SDnode *pDnode, SRpcMsg *pRpcMsg);
 int32_t dndSendReqToDnode(SDnode *pDnode, SEpSet *pEpSet, SRpcMsg *pRpcMsg);
diff --git a/source/dnode/mgmt/container/src/dndMonitor.c b/source/dnode/mgmt/container/src/dndMonitor.c
index 41665df6f6..6a0bc33936 100644
--- a/source/dnode/mgmt/container/src/dndMonitor.c
+++ b/source/dnode/mgmt/container/src/dndMonitor.c
@@ -37,6 +37,8 @@ static void dndGetMonitorBasicInfo(SDnode *pDnode, SMonBasicInfo *pInfo) {
 }
 
 static void dndGetMonitorDnodeInfo(SDnode *pDnode, SMonDnodeInfo *pInfo) {
+
+#if 0
   pInfo->uptime = (taosGetTimestampMs() - pDnode->dmgmt.rebootTime) / (86400000.0f);
   taosGetCpuUsage(&pInfo->cpu_engine, &pInfo->cpu_system);
   pInfo->cpu_cores = tsNumOfCores;
@@ -49,7 +51,6 @@ static void dndGetMonitorDnodeInfo(SDnode *pDnode, SMonDnodeInfo *pInfo) {
   taosGetCardInfo(&pInfo->net_in, &pInfo->net_out);
   taosGetProcIO(&pInfo->io_read, &pInfo->io_write, &pInfo->io_read_disk, &pInfo->io_write_disk);
 
-#if 0
   SVnodesStat *pStat = &pDnode->vmgmt.stat;
   pInfo->req_select = pStat->numOfSelectReqs;
   pInfo->req_insert = pStat->numOfInsertReqs;
diff --git a/source/dnode/mgmt/container/src/dndNode.c b/source/dnode/mgmt/container/src/dndNode.c
index a9bd696c6d..e80bd54f94 100644
--- a/source/dnode/mgmt/container/src/dndNode.c
+++ b/source/dnode/mgmt/container/src/dndNode.c
@@ -15,10 +15,10 @@
 
 #define _DEFAULT_SOURCE
 #include "dndNode.h"
-#include "dmMgmt.h"
 #include "dndTransport.h"
 
 #include "bmInt.h"
+#include "dmInt.h"
 #include "mmInt.h"
 #include "qmInt.h"
 #include "smInt.h"
@@ -43,6 +43,10 @@ static bool dndRequireNode(SMgmtWrapper *pMgmt) {
   return required;
 }
 
+static int32_t dndOpenNode(SMgmtWrapper *pWrapper) { return (*pWrapper->fp.openFp)(pWrapper); }
+
+static void dndCloseNode(SMgmtWrapper *pWrapper) { (*pWrapper->fp.closeFp)(pWrapper); }
+
 static void dndClearMemory(SDnode *pDnode) {
   for (ENodeType n = 0; n < NODE_MAX; ++n) {
     SMgmtWrapper *pMgmt = &pDnode->wrappers[n];
@@ -51,26 +55,12 @@ static void dndClearMemory(SDnode *pDnode) {
   if (pDnode->pLockFile != NULL) {
     taosUnLockFile(pDnode->pLockFile);
     taosCloseFile(&pDnode->pLockFile);
+    pDnode->pLockFile = NULL;
   }
-  tfree(pDnode->path);
+  tfree(pDnode);
   dDebug("dnode object memory is cleared, data:%p", pDnode);
 }
 
-static int32_t dndInitResource(SDnode *pDnode) {
-
-
-
-  return 0;
-}
-
-static void dndClearResource(SDnode *pDnode) {
-  dndCleanupTrans(pDnode);
-  dndStopMgmt(pDnode);
-  dndCleanupMgmt(pDnode);
-  tfsClose(pDnode->pTfs);
-  dDebug("dnode object resource is cleared, data:%p", pDnode);
-}
-
 SDnode *dndCreate(SDndCfg *pCfg) {
   dInfo("start to create dnode object");
   int32_t code = -1;
@@ -84,12 +74,18 @@ SDnode *dndCreate(SDndCfg *pCfg) {
   }
 
   dndSetStatus(pDnode, DND_STAT_INIT);
+  pDnode->pLockFile = dndCheckRunning(pCfg->dataDir);
+  if (pDnode->pLockFile == NULL) {
+    goto _OVER;
+  }
 
-  snprintf(path, sizeof(path), "%s%sdnode", pCfg->dataDir, TD_DIRSEP);
-  pDnode->path = strdup(path);
-  if (taosMkDir(path) != 0) {
-    terrno = TAOS_SYSTEM_ERROR(errno);
-    dError("failed to create dir:%s since %s", path, terrstr());
+  if (dndInitServer(pDnode) != 0) {
+    dError("failed to init trans server since %s", terrstr());
+    goto _OVER;
+  }
+
+  if (dndInitClient(pDnode) != 0) {
+    dError("failed to init trans client since %s", terrstr());
     goto _OVER;
   }
 
@@ -107,10 +103,15 @@ SDnode *dndCreate(SDndCfg *pCfg) {
   pDnode->wrappers[BNODE].name = "bnode";
   memcpy(&pDnode->cfg, pCfg, sizeof(SDndCfg));
 
+  if (dndSetMsgHandle(pDnode) != 0) {
+    goto _OVER;
+  }
+
   for (ENodeType n = 0; n < NODE_MAX; ++n) {
     SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
     snprintf(path, sizeof(path), "%s%s%s", pCfg->dataDir, TD_DIRSEP, pDnode->wrappers[n].name);
     pWrapper->path = strdup(path);
+    pWrapper->pDnode = pDnode;
     if (pDnode->wrappers[n].path == NULL) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
       goto _OVER;
@@ -127,17 +128,11 @@ SDnode *dndCreate(SDndCfg *pCfg) {
     }
   }
 
-  pDnode->pLockFile = dndCheckRunning(pCfg->dataDir);
-  if (pDnode->pLockFile == NULL) {
-    goto _OVER;
-  }
-
   code = 0;
 
 _OVER:
   if (code != 0 && pDnode) {
     dndClearMemory(pDnode);
-    tfree(pDnode);
     dError("failed to create dnode object since %s", terrstr());
   } else {
     dInfo("dnode object is created, data:%p", pDnode);
@@ -157,64 +152,53 @@ void dndClose(SDnode *pDnode) {
   dInfo("start to close dnode, data:%p", pDnode);
   dndSetStatus(pDnode, DND_STAT_STOPPED);
 
-  dndClearResource(pDnode);
+  dndCleanupServer(pDnode);
+  dndCleanupClient(pDnode);
+
+  for (ENodeType n = 0; n < NODE_MAX; ++n) {
+    SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
+    dndCloseNode(pWrapper);
+  }
+
   dndClearMemory(pDnode);
-  tfree(pDnode);
   dInfo("dnode object is closed, data:%p", pDnode);
 }
 
-static int32_t dndOpenNode(SDnode *pDnode, SMgmtWrapper *pWrapper) {
-  // if (tsMultiProcess) {
-  //   SProcCfg cfg = {0};
-  //   pWrapper->pProc = taosProcInit(&cfg);
-  //   if (taosProcIsChild(pWrapper->pProc)) {
-  //     pWrapper->procType = PROC_CHILD;
-  //     dInfo("node:%s, will start in child process", pWrapper->name);
-  //   } else {
-  //     pWrapper->procType = PROC_PARENT;
-  //     dInfo("node:%s, will start in parent process", pWrapper->name);
-  //   }
-  // } else {
-  //   pWrapper->procType = PROC_SINGLE;
-  //   dInfo("node:%s, will start in single process mnode", pWrapper->name);
-  // }
-
-  // if (pWrapper->procType == PROC_SINGLE || pWrapper->procType == PROC_CHILD) {
-  //   SDndInfo info;
-  //   pWrapper->pNode = (*pWrapper->fp.openFp)(pWrapper->path, &info);
-  //   if (pWrapper != NULL) {
-  //     return -1;
-  //   }
-  // }
-
-  // return 0;
-
-   (*pWrapper->fp.openFp)(pWrapper);
-  return 0;
-}
-
-static void dndClearNodeExecpt(SDnode *pDnode, SMgmtWrapper *pWrapper){}
-
 static int32_t dndRunInSingleProcess(SDnode *pDnode) {
   dInfo("dnode run in single process mode");
+
   for (ENodeType n = 0; n < NODE_MAX; ++n) {
     SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
+    if (!pWrapper->required) continue;
+
     dInfo("node:%s, will start in single process", pWrapper->name);
-    if (dndOpenNode(pDnode, pWrapper) != 0) {
+    if (dndOpenNode(pWrapper) != 0) {
       dError("node:%s, failed to start since %s", pWrapper->name, terrstr());
       return -1;
     }
   }
+
   return 0;
 }
 
+static void dndClearNodesExecpt(SDnode *pDnode, ENodeType except) {
+  dndCleanupServer(pDnode);
+  for (ENodeType n = 0; n < NODE_MAX; ++n) {
+    if (except == n) continue;
+    SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
+    dndCloseNode(pWrapper);
+  }
+}
+
 static int32_t dndRunInMultiProcess(SDnode *pDnode) {
   for (ENodeType n = 0; n < NODE_MAX; ++n) {
     SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
+    if (!pWrapper->required) continue;
+
     if (n == DNODE) {
       dInfo("node:%s, will start in parent process", pWrapper->name);
       pWrapper->procType = PROC_PARENT;
-      if (dndOpenNode(pDnode, pWrapper) != 0) {
+      if (dndOpenNode(pWrapper) != 0) {
         dError("node:%s, failed to start since %s", pWrapper->name, terrstr());
         return -1;
       }
@@ -236,17 +220,13 @@ static int32_t dndRunInMultiProcess(SDnode *pDnode) {
       dndResetLog(pWrapper);
 
       dInfo("node:%s, clean up resources inherited from parent", pWrapper->name);
-      dndClearNodeExecpt(pDnode, pWrapper);
-
-      dInfo("node:%s, init trans client in child process", pWrapper->name);
-      dndInitClient(pDnode);
+      dndClearNodesExecpt(pDnode, n);
 
       dInfo("node:%s, will be initialized in child process", pWrapper->name);
-      dndOpenNode(pDnode, pWrapper);
+      dndOpenNode(pWrapper);
     } else {
       dInfo("node:%s, will not start in parent process", pWrapper->name);
       pWrapper->procType = PROC_PARENT;
-      dndOpenNode(pDnode, pWrapper);
     }
   }
 
diff --git a/source/dnode/mgmt/container/src/dndTransport.c b/source/dnode/mgmt/container/src/dndTransport.c
index b36f4c7d3f..a9358066d1 100644
--- a/source/dnode/mgmt/container/src/dndTransport.c
+++ b/source/dnode/mgmt/container/src/dndTransport.c
@@ -15,9 +15,8 @@
 
 #define _DEFAULT_SOURCE
 #include "dndTransport.h"
-#include "dmMgmt.h"
+#include "dmInt.h"
 #include "mmInt.h"
-#include "dmHandle.h"
 
 #define INTERNAL_USER   "_dnd"
 #define INTERNAL_CKEY   "_key"
@@ -47,7 +46,7 @@ static void dndProcessResponse(void *parent, SRpcMsg *pRsp, SEpSet *pEpSet) {
   }
 }
 
- int32_t dndInitClient(SDnode *pDnode) {
+int32_t dndInitClient(SDnode *pDnode) {
   STransMgmt *pMgmt = &pDnode->tmgmt;
 
   SRpcInit rpcInit;
@@ -208,7 +207,7 @@ static int32_t dndRetrieveUserAuthInfo(void *parent, char *user, char *spi, char
   return rpcRsp.code;
 }
 
- int32_t dndInitServer(SDnode *pDnode) {
+int32_t dndInitServer(SDnode *pDnode) {
   STransMgmt *pMgmt = &pDnode->tmgmt;
 
   int32_t numOfThreads = (int32_t)((tsNumOfCores * tsNumOfThreadsPerCore) / 2.0);
@@ -238,7 +237,7 @@ static int32_t dndRetrieveUserAuthInfo(void *parent, char *user, char *spi, char
   return 0;
 }
 
-static void dndCleanupServer(SDnode *pDnode) {
+void dndCleanupServer(SDnode *pDnode) {
   STransMgmt *pMgmt = &pDnode->tmgmt;
   if (pMgmt->serverRpc) {
     rpcClose(pMgmt->serverRpc);
@@ -247,7 +246,7 @@ static void dndCleanupServer(SDnode *pDnode) {
   }
 }
 
-static int32_t dndSetMsgHandle(SDnode *pDnode) {
+int32_t dndSetMsgHandle(SDnode *pDnode) {
   STransMgmt *pMgmt = &pDnode->tmgmt;
 
   for (ENodeType nodeType = 0; nodeType < NODE_MAX; ++nodeType) {
@@ -274,32 +273,6 @@ static int32_t dndSetMsgHandle(SDnode *pDnode) {
   return 0;
 }
 
-int32_t dndInitTrans(SDnode *pDnode) {
-  dInfo("dnode-transport start to init");
-
-  if (dndSetMsgHandle(pDnode) != 0) {
-    return -1;
-  }
-
-  if (dndInitClient(pDnode) != 0) {
-    return -1;
-  }
-
-  if (dndInitServer(pDnode) != 0) {
-    return -1;
-  }
-
-  dInfo("dnode-transport is initialized");
-  return 0;
-}
-
-void dndCleanupTrans(SDnode *pDnode) {
-  dInfo("dnode-transport start to clean up");
-  dndCleanupServer(pDnode);
-  dndCleanupClient(pDnode);
-  dInfo("dnode-transport is cleaned up");
-}
-
 int32_t dndSendReqToDnode(SDnode *pDnode, SEpSet *pEpSet, SRpcMsg *pReq) {
   STransMgmt *pMgmt = &pDnode->tmgmt;
   if (pMgmt->clientRpc == NULL) {
diff --git a/source/dnode/mgmt/dnode/inc/dmFile.h b/source/dnode/mgmt/dnode/inc/dmFile.h
index 64cd00f9ff..91eb24a364 100644
--- a/source/dnode/mgmt/dnode/inc/dmFile.h
+++ b/source/dnode/mgmt/dnode/inc/dmFile.h
@@ -13,25 +13,21 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _TD_DND_FILE_H_
-#define _TD_DND_FILE_H_
+#ifndef _TD_DND_DNODE_FILE_H_
+#define _TD_DND_DNODE_FILE_H_
 
-#include "dndInt.h"
+#include "dmInt.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-int32_t dmReadFile(SDnode *pDnode);
-int32_t dmWriteFile(SDnode *pDnode);
-
-void dndUpdateDnodeEps(SDnode *pDnode, SArray *pDnodeEps);
-void dndResetDnodes(SDnode *pDnode, SArray *pDnodeEps);
-void dndPrintDnodes(SDnode *pDnode);
-bool dndIsEpChanged(SDnode *pDnode, int32_t dnodeId, char *pEp);
+int32_t dmReadFile(SDnodeMgmt *pMgmt);
+int32_t dmWriteFile(SDnodeMgmt *pMgmt);
+void    dndUpdateDnodeEps(SDnodeMgmt *pMgmt, SArray *pDnodeEps);
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif /*_TD_DND_FILE_H_*/
\ No newline at end of file
+#endif /*_TD_DND_DNODE_FILE_H_*/
\ No newline at end of file
diff --git a/source/dnode/mgmt/dnode/inc/dmHandle.h b/source/dnode/mgmt/dnode/inc/dmHandle.h
index e9ae27ba73..0f97c20c4d 100644
--- a/source/dnode/mgmt/dnode/inc/dmHandle.h
+++ b/source/dnode/mgmt/dnode/inc/dmHandle.h
@@ -13,10 +13,10 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _TD_DND_HADNLE_H_
-#define _TD_DND_HADNLE_H_
+#ifndef _TD_DND_DNODE_HADNLE_H_
+#define _TD_DND_DNODE_HADNLE_H_
 
-#include "dndInt.h"
+#include "dmInt.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -33,4 +33,4 @@ void dndProcessStartupReq(SDnode *pDnode, SRpcMsg *pMsg);
 }
 #endif
 
-#endif /*_TD_DND_HADNLE_H_*/
\ No newline at end of file
+#endif /*_TD_DND_DNODE_HADNLE_H_*/
\ No newline at end of file
diff --git a/source/dnode/mgmt/dnode/inc/dmInt.h b/source/dnode/mgmt/dnode/inc/dmInt.h
index af65949eaf..4b67f848cf 100644
--- a/source/dnode/mgmt/dnode/inc/dmInt.h
+++ b/source/dnode/mgmt/dnode/inc/dmInt.h
@@ -22,7 +22,29 @@
 extern "C" {
 #endif
 
+typedef struct SDnodeMgmt {
+  int32_t      dnodeId;
+  int32_t      dropped;
+  int64_t      clusterId;
+  int64_t      dver;
+  int64_t      rebootTime;
+  int64_t      updateTime;
+  int8_t       statusSent;
+  SEpSet       mnodeEpSet;
+  SHashObj    *dnodeHash;
+  SArray      *pDnodeEps;
+  pthread_t   *threadId;
+  SRWLatch     latch;
+  SDnodeWorker mgmtWorker;
+  SDnodeWorker statusWorker;
+  SMsgHandle   msgHandles[TDMT_MAX];
+  const char  *path;
+  SDnode      *pDnode;
+} SDnodeMgmt;
+
 SMgmtFp dmGetMgmtFp();
+void    dndProcessStartupReq(SDnode *pDnode, SRpcMsg *pMsg);
+void    dndGetMnodeEpSet(SDnode *pDnode, SEpSet *pEpSet);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mgmt/dnode/inc/dmMgmt.h b/source/dnode/mgmt/dnode/inc/dmMgmt.h
index c8649b932b..389b9af7da 100644
--- a/source/dnode/mgmt/dnode/inc/dmMgmt.h
+++ b/source/dnode/mgmt/dnode/inc/dmMgmt.h
@@ -13,10 +13,10 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _TD_DND_MGMT_H_
-#define _TD_DND_MGMT_H_
+#ifndef _TD_DND_DNODE_MGMT_H_
+#define _TD_DND_DNODE_MGMT_H_
 
-#include "dndInt.h"
+#include "dmInt.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -38,4 +38,4 @@ void dndProcessMgmtMsg(SDnode *pDnode, SMgmtWrapper *pWrapper, SNodeMsg *pMsg) ;
 }
 #endif
 
-#endif /*_TD_DND_MGMT_H_*/
\ No newline at end of file
+#endif /*_TD_DND_DNODE_MGMT_H_*/
\ No newline at end of file
diff --git a/source/dnode/mgmt/dnode/src/dmFile.c b/source/dnode/mgmt/dnode/src/dmFile.c
index 2adcf0bfa8..aeb0cc40aa 100644
--- a/source/dnode/mgmt/dnode/src/dmFile.c
+++ b/source/dnode/mgmt/dnode/src/dmFile.c
@@ -16,8 +16,18 @@
 #define _DEFAULT_SOURCE
 #include "dmFile.h"
 
-int32_t dmReadFile(SDnode *pDnode) {
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
+static void dndPrintDnodes(SDnodeMgmt *pMgmt);
+static bool dndIsEpChanged(SDnodeMgmt *pMgmt, const char *ep);
+static void dndResetDnodes(SDnodeMgmt *pMgmt, SArray *pDnodeEps);
+
+int32_t dmReadFile(SDnodeMgmt *pMgmt) {
+  int32_t   code = TSDB_CODE_DND_DNODE_READ_FILE_ERROR;
+  int32_t   len = 0;
+  int32_t   maxLen = 256 * 1024;
+  char     *content = calloc(1, maxLen + 1);
+  cJSON    *root = NULL;
+  char      file[PATH_MAX];
+  TdFilePtr pFile = NULL;
 
   pMgmt->pDnodeEps = taosArrayInit(1, sizeof(SDnodeEp));
   if (pMgmt->pDnodeEps == NULL) {
@@ -25,16 +35,8 @@ int32_t dmReadFile(SDnode *pDnode) {
     goto PRASE_DNODE_OVER;
   }
 
-  int32_t code = TSDB_CODE_DND_DNODE_READ_FILE_ERROR;
-  int32_t len = 0;
-  int32_t maxLen = 256 * 1024;
-  char   *content = calloc(1, maxLen + 1);
-  cJSON  *root = NULL;
-
-  char file[PATH_MAX];
-  snprintf(file, sizeof(file), "%s%sdnode.json", pDnode->path, TD_DIRSEP);
-
-  TdFilePtr pFile = taosOpenFile(file, TD_FILE_READ);
+  snprintf(file, sizeof(file), "%s%sdnode.json", pMgmt->path, TD_DIRSEP);
+  pFile = taosOpenFile(file, TD_FILE_READ);
   if (pFile == NULL) {
     dDebug("file %s not exist", file);
     code = 0;
@@ -128,36 +130,34 @@ int32_t dmReadFile(SDnode *pDnode) {
 
   code = 0;
   dInfo("succcessed to read file %s", file);
-  dndPrintDnodes(pDnode);
+  dndPrintDnodes(pMgmt);
 
 PRASE_DNODE_OVER:
   if (content != NULL) free(content);
   if (root != NULL) cJSON_Delete(root);
   if (pFile != NULL) taosCloseFile(&pFile);
 
-  if (dndIsEpChanged(pDnode, pMgmt->dnodeId, pDnode->cfg.localEp)) {
-    dError("localEp %s different with %s and need reconfigured", pDnode->cfg.localEp, file);
+  if (dndIsEpChanged(pMgmt, pMgmt->pDnode->cfg.localEp)) {
+    dError("localEp %s different with %s and need reconfigured", pMgmt->pDnode->cfg.localEp, file);
     return -1;
   }
 
   if (taosArrayGetSize(pMgmt->pDnodeEps) == 0) {
     SDnodeEp dnodeEp = {0};
     dnodeEp.isMnode = 1;
-    taosGetFqdnPortFromEp(pDnode->cfg.firstEp, &dnodeEp.ep);
+    taosGetFqdnPortFromEp(pMgmt->pDnode->cfg.firstEp, &dnodeEp.ep);
     taosArrayPush(pMgmt->pDnodeEps, &dnodeEp);
   }
 
-  dndResetDnodes(pDnode, pMgmt->pDnodeEps);
+  dndResetDnodes(pMgmt, pMgmt->pDnodeEps);
 
   terrno = 0;
   return 0;
 }
 
-int32_t dmWriteFile(SDnode *pDnode) {
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
-
+int32_t dmWriteFile(SDnodeMgmt *pMgmt) {
   char file[PATH_MAX];
-  snprintf(file, sizeof(file), "%s%sdnode.json.bak", pDnode->path, TD_DIRSEP);
+  snprintf(file, sizeof(file), "%s%sdnode.json.bak", pMgmt->path, TD_DIRSEP);
 
   TdFilePtr pFile = taosOpenFile(file, TD_FILE_CTEATE | TD_FILE_WRITE | TD_FILE_TRUNC);
   if (pFile == NULL) {
@@ -197,7 +197,7 @@ int32_t dmWriteFile(SDnode *pDnode) {
   free(content);
 
   char realfile[PATH_MAX];
-  snprintf(realfile, sizeof(realfile), "%s%smnode.json", pDnode->path, TD_DIRSEP);
+  snprintf(realfile, sizeof(realfile), "%s%smnode.json", pMgmt->path, TD_DIRSEP);
 
   if (taosRenameFile(file, realfile) != 0) {
     terrno = TSDB_CODE_DND_MNODE_WRITE_FILE_ERROR;
@@ -210,31 +210,28 @@ int32_t dmWriteFile(SDnode *pDnode) {
   return 0;
 }
 
-void dndUpdateDnodeEps(SDnode *pDnode, SArray *pDnodeEps) {
+void dndUpdateDnodeEps(SDnodeMgmt *pMgmt, SArray *pDnodeEps) {
   int32_t numOfEps = taosArrayGetSize(pDnodeEps);
   if (numOfEps <= 0) return;
 
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   taosWLockLatch(&pMgmt->latch);
 
   int32_t numOfEpsOld = (int32_t)taosArrayGetSize(pMgmt->pDnodeEps);
   if (numOfEps != numOfEpsOld) {
-    dndResetDnodes(pDnode, pDnodeEps);
-    dmWriteFile(pDnode);
+    dndResetDnodes(pMgmt, pDnodeEps);
+    dmWriteFile(pMgmt);
   } else {
     int32_t size = numOfEps * sizeof(SDnodeEp);
     if (memcmp(pMgmt->pDnodeEps->pData, pDnodeEps->pData, size) != 0) {
-      dndResetDnodes(pDnode, pDnodeEps);
-      dmWriteFile(pDnode);
+      dndResetDnodes(pMgmt, pDnodeEps);
+      dmWriteFile(pMgmt);
     }
   }
 
   taosWUnLockLatch(&pMgmt->latch);
 }
 
-void dndResetDnodes(SDnode *pDnode, SArray *pDnodeEps) {
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
-
+static void dndResetDnodes(SDnodeMgmt *pMgmt, SArray *pDnodeEps) {
   if (pMgmt->pDnodeEps != pDnodeEps) {
     SArray *tmp = pMgmt->pDnodeEps;
     pMgmt->pDnodeEps = taosArrayDup(pDnodeEps);
@@ -262,12 +259,10 @@ void dndResetDnodes(SDnode *pDnode, SArray *pDnodeEps) {
     taosHashPut(pMgmt->dnodeHash, &pDnodeEp->id, sizeof(int32_t), pDnodeEp, sizeof(SDnodeEp));
   }
 
-  dndPrintDnodes(pDnode);
+  dndPrintDnodes(pMgmt);
 }
 
-void dndPrintDnodes(SDnode *pDnode) {
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
-
+static void dndPrintDnodes(SDnodeMgmt *pMgmt) {
   int32_t numOfEps = (int32_t)taosArrayGetSize(pMgmt->pDnodeEps);
   dDebug("print dnode ep list, num:%d", numOfEps);
   for (int32_t i = 0; i < numOfEps; i++) {
@@ -276,17 +271,15 @@ void dndPrintDnodes(SDnode *pDnode) {
   }
 }
 
-bool dndIsEpChanged(SDnode *pDnode, int32_t dnodeId, char *pEp) {
+static bool dndIsEpChanged(SDnodeMgmt *pMgmt, const char *ep) {
   bool changed = false;
-
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   taosRLockLatch(&pMgmt->latch);
 
-  SDnodeEp *pDnodeEp = taosHashGet(pMgmt->dnodeHash, &dnodeId, sizeof(int32_t));
+  SDnodeEp *pDnodeEp = taosHashGet(pMgmt->dnodeHash, &pMgmt->dnodeId, sizeof(int32_t));
   if (pDnodeEp != NULL) {
     char epstr[TSDB_EP_LEN + 1];
     snprintf(epstr, TSDB_EP_LEN, "%s:%u", pDnodeEp->ep.fqdn, pDnodeEp->ep.port);
-    changed = strcmp(pEp, epstr) != 0;
+    changed = strcmp(ep, epstr) != 0;
   }
 
   taosRUnLockLatch(&pMgmt->latch);
diff --git a/source/dnode/mgmt/dnode/src/dmMgmt.c b/source/dnode/mgmt/dnode/src/dmMgmt.c
index 51efdb9df6..4f541b8980 100644
--- a/source/dnode/mgmt/dnode/src/dmMgmt.c
+++ b/source/dnode/mgmt/dnode/src/dmMgmt.c
@@ -296,6 +296,7 @@ static int32_t dmInit(SMgmtWrapper *pWrapper) {
   pMgmt->rebootTime = taosGetTimestampMs();
   pMgmt->dropped = 0;
   pMgmt->clusterId = 0;
+  pMgmt->path = pWrapper->path;
   taosInitRWLatch(&pMgmt->latch);
 
   pMgmt->dnodeHash = taosHashInit(4, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true, HASH_NO_LOCK);
@@ -305,7 +306,7 @@ static int32_t dmInit(SMgmtWrapper *pWrapper) {
     return -1;
   }
 
-  if (dmReadFile(pWrapper->pDnode) != 0) {
+  if (dmReadFile(pMgmt) != 0) {
     dError("node:%s, failed to read file since %s", pWrapper->name, terrstr());
     return -1;
   }
@@ -352,7 +353,7 @@ static int32_t dmInit(SMgmtWrapper *pWrapper) {
 #endif
 }
 
-static void dmCleanup(SDnode *pDnode, SMgmtWrapper *pWrapper){
+static void dmCleanup(SMgmtWrapper *pWrapper){
 
 }
 
diff --git a/source/dnode/mgmt/dnode/src/dmWorker.c b/source/dnode/mgmt/dnode/src/dmWorker.c
index b99162830a..981222637f 100644
--- a/source/dnode/mgmt/dnode/src/dmWorker.c
+++ b/source/dnode/mgmt/dnode/src/dmWorker.c
@@ -18,10 +18,9 @@
 #include "dndWorker.h"
 #include "dmHandle.h"
 
-
 static void *dnodeThreadRoutine(void *param) {
-  SDnode     *pDnode = param;
-  SDnodeMgmt *pMgmt = &pDnode->dmgmt;
+  SDnodeMgmt *pMgmt = param;
+  SDnode     *pDnode = pMgmt->pDnode;
   int64_t     lastStatusTime = taosGetTimestampMs();
   int64_t     lastMonitorTime = lastStatusTime;
 
@@ -50,7 +49,6 @@ static void *dnodeThreadRoutine(void *param) {
   }
 }
 
-
 static void dndProcessMgmtQueue(SDnode *pDnode, SRpcMsg *pMsg) {
   int32_t code = 0;