diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 15daa97dbfaa704ad7f19d6125d8ce37d2354653..f6bee57c94e1342b3aed88db1cd5829fe0f06511 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -1089,6 +1089,10 @@ static FORCE_INLINE void* tDeserializeSMVSubscribeReq(void* buf, SMVSubscribeReq
   return buf;
 }
 
+typedef struct SMqTmrMsg {
+  int32_t reserved;
+} SMqTmrMsg;
+
 typedef struct {
   int64_t status;
 } SMVSubscribeRsp;
diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index bfeba885d0ddb6bd3ffee645353d9ac90b1f48a1..93adc58eca97c93c9c3cbbcc6836908a12a55d0d 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -140,6 +140,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_MND_ALTER_TOPIC, "mnode-alter-topic", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_DROP_TOPIC, "mnode-drop-topic", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_SUBSCRIBE, "mnode-subscribe", SCMSubscribeReq, SCMSubscribeRsp)
+  TD_DEF_MSG_TYPE(TDMT_MND_MQ_TIMER, "mnode-timer", SMqTmrMsg, SMqTmrMsg)
 
   // Requests handled by VNODE
   TD_NEW_MSG_SEG(TDMT_VND_MSG)
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index 415d6a57ce4e1d1cdfcba2510d29cc75aa1607af..1250402cafa7c7f5dee9adf3b4877c59cecea09a 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -148,30 +148,30 @@ TEST(testCase, connect_Test) {
 //  taos_close(pConn);
 //}
 //
-//TEST(testCase, create_db_Test) {
-  //TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
-  //assert(pConn != NULL);
+TEST(testCase, create_db_Test) {
+  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
 
-  //TAOS_RES* pRes = taos_query(pConn, "create database abc1 vgroups 2");
-  //if (taos_errno(pRes) != 0) {
-    //printf("error in create db, reason:%s\n", taos_errstr(pRes));
-  //}
+  TAOS_RES* pRes = taos_query(pConn, "create database abc1 vgroups 2");
+  if (taos_errno(pRes) != 0) {
+    printf("error in create db, reason:%s\n", taos_errstr(pRes));
+  }
 
-  //TAOS_FIELD* pFields = taos_fetch_fields(pRes);
-  //ASSERT_TRUE(pFields == NULL);
+  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
+  ASSERT_TRUE(pFields == NULL);
 
-  //int32_t numOfFields = taos_num_fields(pRes);
-  //ASSERT_EQ(numOfFields, 0);
+  int32_t numOfFields = taos_num_fields(pRes);
+  ASSERT_EQ(numOfFields, 0);
 
-  //taos_free_result(pRes);
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "create database abc1 vgroups 4");
+  if (taos_errno(pRes) != 0) {
+    printf("error in create db, reason:%s\n", taos_errstr(pRes));
+  }
+  taos_close(pConn);
+}
 
-  //pRes = taos_query(pConn, "create database abc1 vgroups 4");
-  //if (taos_errno(pRes) != 0) {
-    //printf("error in create db, reason:%s\n", taos_errstr(pRes));
-  //}
-  //taos_close(pConn);
-//}
-//
 //TEST(testCase, create_dnode_Test) {
 //  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
 //  assert(pConn != NULL);
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index ab4ae4ac53c60a1d8d9d8fdef7010e221c6b8b3c..f4fda75bd86e20087c38e6b566089823443ede38 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -100,7 +100,7 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_VGROUP_LIST)] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_KILL_QUERY)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_KILL_CONN)] = dndProcessMnodeWriteMsg;
-  pMgmt->msgFp[TMSG_INDEX(TDMT_MND_HEARTBEAT)] = dndProcessMnodeReadMsg;
+  pMgmt->msgFp[TMSG_INDEX(TDMT_MND_HEARTBEAT)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_SHOW)] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_SHOW_RETRIEVE)] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_STATUS)] = dndProcessMnodeReadMsg;
diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index 45759117b5eb7b97f49603de975a0c63b1c3c9a4..ed88b42d398b54a175dd36039dc099d2d782f2f6 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -354,6 +354,7 @@ typedef struct SMqSubscribeObj {
   char    key[TSDB_SUBSCRIBE_KEY_LEN];
   int32_t epoch;
   //TODO: replace with priority queue
+  int32_t nextConsumerIdx;
   SArray* availConsumer;        // SArray<int64_t> (consumerId)
   SArray* assigned;             // SArray<SMqConsumerEp>
   SArray* unassignedConsumer;   // SArray<SMqConsumerEp>
diff --git a/source/dnode/mnode/impl/inc/mndInt.h b/source/dnode/mnode/impl/inc/mndInt.h
index d2107b9d07cdff201c4a0f39cb97d25430206205..29ccd43622e84d194ac5ad59a231795c96b980f3 100644
--- a/source/dnode/mnode/impl/inc/mndInt.h
+++ b/source/dnode/mnode/impl/inc/mndInt.h
@@ -80,6 +80,7 @@ typedef struct SMnode {
   SReplica          replicas[TSDB_MAX_REPLICA];
   tmr_h             timer;
   tmr_h             transTimer;
+  tmr_h             mqTimer;
   char             *path;
   SMnodeCfg         cfg;
   int64_t           checkTime;
diff --git a/source/dnode/mnode/impl/src/mndSubscribe.c b/source/dnode/mnode/impl/src/mndSubscribe.c
index 52f33fa89ccd2f0439e6230026fac82f10d43d14..7b95e932574e48c734311d34520490644e4b39c2 100644
--- a/source/dnode/mnode/impl/src/mndSubscribe.c
+++ b/source/dnode/mnode/impl/src/mndSubscribe.c
@@ -13,13 +13,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "mndSubscribe.h"
 #include "mndConsumer.h"
 #include "mndDb.h"
 #include "mndDnode.h"
 #include "mndMnode.h"
 #include "mndShow.h"
 #include "mndStb.h"
-#include "mndSubscribe.h"
 #include "mndTopic.h"
 #include "mndTrans.h"
 #include "mndUser.h"
@@ -40,6 +40,10 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg);
 static int32_t mndProcessSubscribeRsp(SMnodeMsg *pMsg);
 static int32_t mndProcessSubscribeInternalReq(SMnodeMsg *pMsg);
 static int32_t mndProcessSubscribeInternalRsp(SMnodeMsg *pMsg);
+static int32_t mndProcessMqTimerMsg(SMnodeMsg *pMsg);
+
+static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsumerObj *pConsumer,
+                                      SMqConsumerTopic *pConsumerTopic, SMqTopicObj *pTopic);
 
 int32_t mndInitSubscribe(SMnode *pMnode) {
   SSdbTable table = {.sdbType = SDB_SUBSCRIBE,
@@ -54,9 +58,90 @@ int32_t mndInitSubscribe(SMnode *pMnode) {
   /*mndSetMsgHandle(pMnode, TDMT_MND_SUBSCRIBE_RSP, mndProcessSubscribeRsp);*/
   /*mndSetMsgHandle(pMnode, TDMT_VND_SUBSCRIBE, mndProcessSubscribeInternalReq);*/
   mndSetMsgHandle(pMnode, TDMT_VND_SUBSCRIBE_RSP, mndProcessSubscribeInternalRsp);
+  mndSetMsgHandle(pMnode, TDMT_MND_MQ_TIMER, mndProcessMqTimerMsg);
   return sdbSetTable(pMnode->pSdb, table);
 }
 
+static int32_t mndSplitSubscribeKey(char *key, char **topic, char **cgroup) {
+  int i = 0;
+  while (key[i] != ':') {
+    i++;
+  }
+  key[i] = 0;
+  *topic = strdup(key);
+  key[i] = ':';
+  *cgroup = strdup(&key[i + 1]);
+  return 0;
+}
+
+static int32_t mndProcessMqTimerMsg(SMnodeMsg *pMsg) {
+  SMnode          *pMnode = pMsg->pMnode;
+  SSdb            *pSdb = pMnode->pSdb;
+  SMqSubscribeObj *pSub = NULL;
+  void            *pIter = sdbFetch(pSdb, SDB_SUBSCRIBE, NULL, (void **)&pSub);
+  int              sz;
+  while (pIter != NULL) {
+    if ((sz = taosArrayGetSize(pSub->unassignedVg)) > 0) {
+      char *topic = NULL;
+      char *cgroup = NULL;
+      mndSplitSubscribeKey(pSub->key, &topic, &cgroup);
+
+      SMqTopicObj *pTopic = mndAcquireTopic(pMnode, topic);
+
+      // create trans
+      STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, &pMsg->rpcMsg);
+      for (int i = 0; i < sz; i++) {
+        int64_t        consumerId = *(int64_t *)taosArrayGet(pSub->availConsumer, pSub->nextConsumerIdx);
+        SMqConsumerEp *pCEp = taosArrayPop(pSub->unassignedVg);
+        pCEp->consumerId = consumerId;
+        taosArrayPush(pSub->assigned, pCEp);
+        pSub->nextConsumerIdx++;
+
+        // build msg
+        SMqSetCVgReq req = {
+            .vgId = pCEp->vgId,
+            .consumerId = consumerId,
+        };
+        strcpy(req.cGroup, cgroup);
+        strcpy(req.topicName, topic);
+        strcpy(req.sql, pTopic->sql);
+        strcpy(req.logicalPlan, pTopic->logicalPlan);
+        strcpy(req.physicalPlan, pTopic->physicalPlan);
+        int32_t tlen = tEncodeSMqSetCVgReq(NULL, &req);
+        void   *reqStr = malloc(tlen);
+        if (reqStr == NULL) {
+          terrno = TSDB_CODE_OUT_OF_MEMORY;
+          return -1;
+        }
+        void *abuf = reqStr;
+        tEncodeSMqSetCVgReq(abuf, &req);
+
+        // persist msg
+        STransAction action = {0};
+        action.epSet = pCEp->epset;
+        action.pCont = reqStr;
+        action.contLen = tlen;
+        action.msgType = TDMT_VND_MQ_SET_CONN;
+        mndTransAppendRedoAction(pTrans, &action);
+
+        // persist raw
+        SSdbRaw *pRaw = mndSubActionEncode(pSub);
+        mndTransAppendRedolog(pTrans, pRaw);
+
+        tfree(topic);
+        tfree(cgroup);
+      }
+      if (mndTransPrepare(pMnode, pTrans) != 0) {
+        mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+      }
+      mndReleaseTopic(pMnode, pTopic);
+      mndTransDrop(pTrans);
+    }
+    pIter = sdbFetch(pSdb, SDB_SUBSCRIBE, NULL, (void **)&pSub);
+  }
+  return 0;
+}
+
 static int mndInitUnassignedVg(SMnode *pMnode, SMqTopicObj *pTopic, SArray *unassignedVg) {
   SMqConsumerEp CEp;
   CEp.lastConsumerHbTs = CEp.lastVgHbTs = -1;
@@ -76,7 +161,7 @@ static int mndInitUnassignedVg(SMnode *pMnode, SMqTopicObj *pTopic, SArray *unas
 }
 
 static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsumerObj *pConsumer,
-                                      SMqConsumerTopic *pConsumerTopic) {
+                                      SMqConsumerTopic *pConsumerTopic, SMqTopicObj *pTopic) {
   int32_t sz = taosArrayGetSize(pConsumerTopic->pVgInfo);
   for (int32_t i = 0; i < sz; i++) {
     int32_t      vgId = *(int32_t *)taosArrayGet(pConsumerTopic->pVgInfo, i);
@@ -86,7 +171,10 @@ static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsume
         .consumerId = pConsumer->consumerId,
     };
     strcpy(req.cGroup, pConsumer->cgroup);
-    strcpy(req.topicName, pConsumerTopic->name);
+    strcpy(req.topicName, pTopic->name);
+    strcpy(req.sql, pTopic->sql);
+    strcpy(req.logicalPlan, pTopic->logicalPlan);
+    strcpy(req.physicalPlan, pTopic->physicalPlan);
     int32_t tlen = tEncodeSMqSetCVgReq(NULL, &req);
     void   *reqStr = malloc(tlen);
     if (reqStr == NULL) {
@@ -94,7 +182,7 @@ static int mndBuildMqSetConsumerVgReq(SMnode *pMnode, STrans *pTrans, SMqConsume
       return -1;
     }
     void *abuf = reqStr;
-    tEncodeSMqSetCVgReq(abuf, &req);
+    tEncodeSMqSetCVgReq(&abuf, &req);
 
     STransAction action = {0};
     action.epSet = mndGetVgroupEpset(pMnode, pVgObj);
@@ -278,20 +366,20 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
 
   int i = 0, j = 0;
   while (i < newTopicNum || j < oldTopicNum) {
-    char* newTopicName = NULL;
-    char* oldTopicName = NULL;
+    char *newTopicName = NULL;
+    char *oldTopicName = NULL;
     if (i >= newTopicNum) {
       // encode unset topic msg to all vnodes related to that topic
-      oldTopicName = ((SMqConsumerTopic*)taosArrayGet(oldSub, j))->name;
+      oldTopicName = ((SMqConsumerTopic *)taosArrayGet(oldSub, j))->name;
       j++;
     } else if (j >= oldTopicNum) {
       newTopicName = taosArrayGet(newSub, i);
       i++;
     } else {
       newTopicName = taosArrayGet(newSub, i);
-      oldTopicName = ((SMqConsumerTopic*)taosArrayGet(oldSub, j))->name;
+      oldTopicName = ((SMqConsumerTopic *)taosArrayGet(oldSub, j))->name;
 
-      int   comp = compareLenPrefixedStr(newTopicName, oldTopicName);
+      int comp = compareLenPrefixedStr(newTopicName, oldTopicName);
       if (comp == 0) {
         // do nothing
         oldTopicName = newTopicName = NULL;
@@ -374,19 +462,25 @@ static int32_t mndProcessSubscribeReq(SMnodeMsg *pMsg) {
         // set unassigned vg
         mndInitUnassignedVg(pMnode, pTopic, pSub->unassignedVg);
       }
+      taosArrayPush(pSub->availConsumer, &consumerId);
+
+      //TODO: no need
       SMqConsumerTopic *pConsumerTopic = tNewConsumerTopic(consumerId, pTopic, pSub);
       taosArrayPush(pConsumer->topics, pConsumerTopic);
 
       if (taosArrayGetSize(pConsumerTopic->pVgInfo) > 0) {
         int32_t vgId = *(int32_t *)taosArrayGetLast(pConsumerTopic->pVgInfo);
         // send setmsg to vnode
-        if (mndBuildMqSetConsumerVgReq(pMnode, pTrans, pConsumer, pConsumerTopic) < 0) {
+        if (mndBuildMqSetConsumerVgReq(pMnode, pTrans, pConsumer, pConsumerTopic, pTopic) < 0) {
           // TODO
           return -1;
         }
       }
       taosArrayDestroy(pConsumerTopic->pVgInfo);
       free(pConsumerTopic);
+      SSdbRaw *pRaw = mndSubActionEncode(pSub);
+      /*sdbSetRawStatus(pRaw, SDB_STATUS_READY);*/
+      mndTransAppendRedolog(pTrans, pRaw);
 #if 0
       SMqCGroup *pGroup = taosHashGet(pTopic->cgroups, consumerGroup, cgroupLen);
       if (pGroup == NULL) {
diff --git a/source/dnode/mnode/impl/src/mnode.c b/source/dnode/mnode/impl/src/mnode.c
index cab30702ea38d858f318b64de2c1b60a246cf4a6..e57ee3eabc13b4fbedf3ec1dc6486a12a3fbb273 100644
--- a/source/dnode/mnode/impl/src/mnode.c
+++ b/source/dnode/mnode/impl/src/mnode.c
@@ -18,6 +18,7 @@
 #include "mndAuth.h"
 #include "mndBnode.h"
 #include "mndCluster.h"
+#include "mndConsumer.h"
 #include "mndDb.h"
 #include "mndDnode.h"
 #include "mndFunc.h"
@@ -27,6 +28,7 @@
 #include "mndShow.h"
 #include "mndSnode.h"
 #include "mndStb.h"
+#include "mndSubscribe.h"
 #include "mndSync.h"
 #include "mndTelem.h"
 #include "mndTopic.h"
@@ -69,15 +71,15 @@ static void mndTransReExecute(void *param, void *tmrId) {
   taosTmrReset(mndTransReExecute, 3000, pMnode, pMnode->timer, &pMnode->transTimer);
 }
 
-static void mndCalMqRebalance(void* param, void* tmrId) {
-  SMnode* pMnode = param;
+static void mndCalMqRebalance(void *param, void *tmrId) {
+  SMnode *pMnode = param;
   if (mndIsMaster(pMnode)) {
-    // iterate cgroup, cal rebalance
-    // sync with raft
-    // write sdb
+    SMqTmrMsg *pMsg = rpcMallocCont(sizeof(SMqTmrMsg));
+    SRpcMsg    rpcMsg = {.msgType = TDMT_MND_MQ_TIMER, .pCont = pMsg, .contLen = sizeof(SMqTmrMsg)};
+    pMnode->putReqToMWriteQFp(pMnode->pDnode, &rpcMsg);
   }
 
-  taosTmrReset(mndCalMqRebalance, 3000, pMnode, pMnode->timer, &pMnode->transTimer);
+  taosTmrReset(mndCalMqRebalance, 3000, pMnode, pMnode->timer, &pMnode->mqTimer);
 }
 
 static int32_t mndInitTimer(SMnode *pMnode) {
@@ -95,6 +97,11 @@ static int32_t mndInitTimer(SMnode *pMnode) {
     return -1;
   }
 
+  if (taosTmrReset(mndCalMqRebalance, 3000, pMnode, pMnode->timer, &pMnode->mqTimer)) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
   return 0;
 }
 
@@ -102,6 +109,8 @@ static void mndCleanupTimer(SMnode *pMnode) {
   if (pMnode->timer != NULL) {
     taosTmrStop(pMnode->transTimer);
     pMnode->transTimer = NULL;
+    taosTmrStop(pMnode->mqTimer);
+    pMnode->mqTimer = NULL;
     taosTmrCleanUp(pMnode->timer);
     pMnode->timer = NULL;
   }
@@ -171,6 +180,8 @@ static int32_t mndInitSteps(SMnode *pMnode) {
   if (mndAllocStep(pMnode, "mnode-auth", mndInitAuth, mndCleanupAuth) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-acct", mndInitAcct, mndCleanupAcct) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-topic", mndInitTopic, mndCleanupTopic) != 0) return -1;
+  if (mndAllocStep(pMnode, "mnode-consumer", mndInitConsumer, mndCleanupConsumer) != 0) return -1;
+  if (mndAllocStep(pMnode, "mnode-subscribe", mndInitSubscribe, mndCleanupSubscribe) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-vgroup", mndInitVgroup, mndCleanupVgroup) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-stb", mndInitStb, mndCleanupStb) != 0) return -1;
   if (mndAllocStep(pMnode, "mnode-db", mndInitDb, mndCleanupDb) != 0) return -1;
@@ -377,7 +388,7 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
     return NULL;
   }
 
-  if (pRpcMsg->msgType != TDMT_MND_TRANS) {
+  if (pRpcMsg->msgType != TDMT_MND_TRANS && pRpcMsg->msgType != TDMT_MND_MQ_TIMER) {
     SRpcConnInfo connInfo = {0};
     if ((pRpcMsg->msgType & 1U) && rpcGetConnInfo(pRpcMsg->handle, &connInfo) != 0) {
       taosFreeQitem(pMsg);
diff --git a/source/dnode/vnode/src/vnd/vnodeWrite.c b/source/dnode/vnode/src/vnd/vnodeWrite.c
index bb863d6ed02ae2416c05539dc3f576d2386af702..ea69f4c870f7a65835d94bd5132a28489105ff83 100644
--- a/source/dnode/vnode/src/vnd/vnodeWrite.c
+++ b/source/dnode/vnode/src/vnd/vnodeWrite.c
@@ -108,6 +108,15 @@ int vnodeApplyWMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
         // TODO: handle error
       }
       break;
+    case TDMT_VND_MQ_SET_CONN: {
+      char* reqStr = ptr;
+      SMqSetCVgReq req;
+      /*tDecodeSMqSetCVgReq(reqStr, &req);*/
+      // create topic if not exist
+      // convert to task
+      // write mq meta
+    }
+      break;
     default:
       ASSERT(0);
       break;