diff --git a/.gitignore b/.gitignore
index 83ed62c030..8df75abe20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@ mac/
 .mypy_cache
 *.tmp
 *.swp
+*.orig
 src/connector/nodejs/node_modules/
 src/connector/nodejs/out/
 tests/test/
diff --git a/include/libs/wal/wal.h b/include/libs/wal/wal.h
index b6fd5a70d9..9a3310922d 100644
--- a/include/libs/wal/wal.h
+++ b/include/libs/wal/wal.h
@@ -58,9 +58,9 @@ void     walStop(twalh);
 void     walClose(twalh);
 
 //write
-int64_t  walWriteWithMsgType(twalh, int8_t msgType, void* body, int32_t bodyLen);
+//int64_t  walWriteWithMsgType(twalh, int8_t msgType, void* body, int32_t bodyLen);
 int64_t  walWrite(twalh, void* body, int32_t bodyLen);
-int64_t  walWriteBatch(twalh, void* body, int32_t* bodyLen, int32_t batchSize);
+int64_t  walWriteBatch(twalh, void** bodies, int32_t* bodyLen, int32_t batchSize);
 
 //apis for lifecycle management
 void     walFsync(twalh, bool force);
diff --git a/include/server/vnode/tq/tq.h b/include/server/vnode/tq/tq.h
index 6e56e8256f..f30ba75c42 100644
--- a/include/server/vnode/tq/tq.h
+++ b/include/server/vnode/tq/tq.h
@@ -24,9 +24,10 @@ extern "C" {
 
 typedef struct tmqMsgHead {
   int32_t headLen;
-  int32_t msgVer;
+  int32_t protoVer;
   int64_t cgId;
   int64_t topicId;
+  int64_t clientId;
   int32_t checksum;
   int32_t msgType;
 } tmqMsgHead;
@@ -34,35 +35,43 @@ typedef struct tmqMsgHead {
 //TODO: put msgs into common
 typedef struct tmqConnectReq {
   tmqMsgHead head;
-
 } tmqConnectReq;
 
 typedef struct tmqConnectResp {
-
+  tmqMsgHead head;
+  int8_t status;
 } tmqConnectResp;
 
 typedef struct tmqDisconnectReq {
-
+  tmqMsgHead head;
 } tmqDisconnectReq;
 
 typedef struct tmqDisconnectResp {
-
+  tmqMsgHead head;
+  int8_t status;
 } tmqDiconnectResp;
 
 typedef struct tmqConsumeReq {
-
+  tmqMsgHead head;
+  int64_t commitOffset;
 } tmqConsumeReq;
 
 typedef struct tmqConsumeResp {
-
+  tmqMsgHead head;
+  char content[];
 } tmqConsumeResp;
 
-typedef struct tmqSubscribeReq {
-
+//
+typedef struct tmqMnodeSubscribeReq {
+  tmqMsgHead head;
+  int64_t topicLen;
+  char topic[];
 } tmqSubscribeReq;
 
-typedef struct tmqSubscribeResp {
-
+typedef struct tmqMnodeSubscribeResp {
+  tmqMsgHead head;
+  int64_t vgId;
+  char ep[]; //TSDB_EP_LEN
 } tmqSubscribeResp;
 
 typedef struct tmqHeartbeatReq {
@@ -92,6 +101,24 @@ typedef struct STQ {
   //value=consumeOffset: int64_t
 } STQ;
 
+#define TQ_BUFFER_SIZE 8
+
+typedef struct tqBufferItem {
+  int64_t offset;
+  void* executor;
+  void* content;
+} tqBufferItem;
+
+typedef struct tqGroupHandle {
+  char* topic; //c style, end with '\0'
+  int64_t cgId;
+  void* ahandle;
+  int64_t consumeOffset;
+  int32_t head;
+  int32_t tail;
+  tqBufferItem buffer[TQ_BUFFER_SIZE];
+} tqGroupHandle;
+
 //init in each vnode
 STQ* tqInit(void* ref_func(void*), void* unref_func(void*));
 void tqCleanUp(STQ*);
@@ -103,6 +130,17 @@ int tqCommit(STQ*);
 //void* will be replace by a msg type
 int tqHandleConsumeMsg(STQ*, tmqConsumeReq* msg);
 
+tqGroupHandle* tqFindGHandleBycId(STQ*, int64_t cId);
+
+int tqOpenTCGroup(STQ*, int64_t topicId, int64_t cgId, int64_t cId);
+int tqCloseTCGroup(STQ*, int64_t topicId, int64_t cgId, int64_t cId);
+int tqMoveOffsetToNext(tqGroupHandle*);
+int tqResetOffset(STQ*, int64_t topicId, int64_t cgId, int64_t offset);
+int tqFetchMsg(tqGroupHandle*, void*);
+int tqRegisterContext(tqGroupHandle*, void*);
+int tqLaunchQuery(STQ*, int64_t topicId, int64_t cgId, void* query);
+int tqSendLaunchQuery(STQ*, int64_t topicId, int64_t cgId, void* query);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/server/dnode/src/dnodeTrans.c b/source/server/dnode/src/dnodeTrans.c
index 20601f23e7..6d734932ff 100644
--- a/source/server/dnode/src/dnodeTrans.c
+++ b/source/server/dnode/src/dnodeTrans.c
@@ -25,6 +25,7 @@
 #include "dnodeMsg.h"
 #include "mnode.h"
 #include "vnode.h"
+#include "mnode.h"
 
 typedef void (*RpcMsgFp)(SRpcMsg *pMsg);
 
@@ -143,7 +144,6 @@ static void dnodeProcessPeerRsp(SRpcMsg *pMsg, SRpcEpSet *pEpSet) {
 
   RpcMsgFp fp = tsTrans.peerMsgFp[msgType];
   if (fp != NULL) {
-    dTrace("RPC %p, peer rsp:%s will be processed", pMsg->handle, taosMsg[msgType]);
     (*fp)(pMsg);
   } else {
     dDebug("RPC %p, peer rsp:%s not processed", pMsg->handle, taosMsg[msgType]);
diff --git a/source/server/vnode/src/vnodeReadMsg.c b/source/server/vnode/src/vnodeReadMsg.c
index 158e550dcf..b4070546c7 100644
--- a/source/server/vnode/src/vnodeReadMsg.c
+++ b/source/server/vnode/src/vnodeReadMsg.c
@@ -218,10 +218,33 @@ int32_t vnodeProcessQueryMsg(SVnode *pVnode, SReadMsg *pRead) {
 }
 
 //mq related
-int32_t vnodeProcessConsumeMsg(SVnode *pVnode, SReadMsg *pRead){
+int32_t vnodeProcessConsumeMsg(SVnode *pVnode, SReadMsg *pRead) {
+  //parse message and optionally move offset
+  void* pMsg = pRead->pCont;
+  tmqConsumeReq *pConsumeMsg = (tmqConsumeReq*) pMsg;
+  tmqMsgHead msgHead = pConsumeMsg->head;
+  //extract head
+  STQ *pTq = pVnode->pTQ;
+  tqGroupHandle *pHandle = tqFindGHandleBycId(pTq, msgHead.clientId);
+  //return msg if offset not moved
+  if(pConsumeMsg->commitOffset == pHandle->consumeOffset) {
+    //return msg
+    return 0;
+  }
+  //or move offset
+  tqMoveOffsetToNext(pHandle);
+  //fetch or register context
+  tqFetchMsg(pHandle, pRead);
+  //judge mode, tail read or catch up read
+  //launch new query
   return 0;
 }
+
 int32_t vnodeProcessTqQueryMsg(SVnode *pVnode, SReadMsg *pRead) {
+  //get operator tree from tq data structure
+  //execute operator tree
+  //put data into ringbuffer
+  //unref memory
   return 0;
 }
 //mq related end
diff --git a/source/server/vnode/tq/inc/tqInt.h b/source/server/vnode/tq/inc/tqInt.h
index cba9075fe9..0896e7afab 100644
--- a/source/server/vnode/tq/inc/tqInt.h
+++ b/source/server/vnode/tq/inc/tqInt.h
@@ -18,37 +18,19 @@
 
 #include "tq.h"
 
-#define TQ_BUFFER_SIZE 8
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-typedef struct tqBufferItem {
-  int64_t offset;
-  void* executor;
-  void* content;
-} tqBufferItem;
-
-
-typedef struct tqGroupHandle {
-  char* topic; //c style, end with '\0'
-  int64_t cgId;
-  void* ahandle;
-  int64_t consumeOffset;
-  int32_t head;
-  int32_t tail;
-  tqBufferItem buffer[TQ_BUFFER_SIZE];
-} tqGroupHandle;
-
 //create persistent storage for meta info such as consuming offset
 //return value > 0: cgId
 //return value <= 0: error code
 int tqCreateTCGroup(STQ*, const char* topic, int cgId, tqGroupHandle** handle);
 //create ring buffer in memory and load consuming offset
-int tqOpenTCGroup(STQ*, const char* topic, int cgId);
+//int tqOpenTCGroup(STQ*, const char* topic, int cgId);
 //destroy ring buffer and persist consuming offset
-int tqCloseTCGroup(STQ*, const char* topic, int cgId);
+//int tqCloseTCGroup(STQ*, const char* topic, int cgId);
 //delete persistent storage for meta info
 int tqDropTCGroup(STQ*, const char* topic, int cgId);
 
diff --git a/source/server/vnode/tq/src/tq.c b/source/server/vnode/tq/src/tq.c
index 7733ac29b5..e0f2fc545e 100644
--- a/source/server/vnode/tq/src/tq.c
+++ b/source/server/vnode/tq/src/tq.c
@@ -22,7 +22,7 @@
 //
 //handle management message
 
-static tqGroupHandle* tqLookupGroupHandle(STQ *pTq, const char* topic, int cgId) {
+tqGroupHandle* tqLookupGroupHandle(STQ *pTq, const char* topic, int cgId) {
   //look in memory
   //
   //not found, try to restore from disk
@@ -56,16 +56,30 @@ int tqOpenTGroup(STQ* pTq, const char* topic, int cgId) {
   return 0;
 }
 
-int tqCloseTCGroup(STQ* pTq, const char* topic, int cgId) {
-  tqGroupHandle* handle = tqLookupGroupHandle(pTq, topic, cgId);
-  return tqCommitTCGroup(handle);
-}
+/*int tqCloseTCGroup(STQ* pTq, const char* topic, int cgId) {*/
+  /*tqGroupHandle* handle = tqLookupGroupHandle(pTq, topic, cgId);*/
+  /*return tqCommitTCGroup(handle);*/
+/*}*/
 
 int tqDropTCGroup(STQ* pTq, const char* topic, int cgId) {
   //delete from disk
   return 0;
 }
 
+
+int tqFetchMsg(tqGroupHandle* handle, void* msg) {
+  return 0;
+}
+
+int tqMoveOffsetToNext(tqGroupHandle* handle) {
+  return 0;
+}
+
+
+tqGroupHandle* tqFindGHandleBycId(STQ* pTq, int64_t cId) {
+  return NULL;
+}
+
 int tqPushMsg(STQ* pTq , void* p, int64_t version) {
   //add reference
   //judge and launch new query