diff --git a/include/dnode/vnode/tsdb/tsdb.h b/include/dnode/vnode/tsdb/tsdb.h
index e92205378a..e486da5419 100644
--- a/include/dnode/vnode/tsdb/tsdb.h
+++ b/include/dnode/vnode/tsdb/tsdb.h
@@ -29,6 +29,7 @@ typedef struct STsdbMemAllocator STsdbMemAllocator;
 STsdb *tsdbOpen(const char *path, const STsdbOptions *);
 void   tsdbClose(STsdb *);
 void   tsdbRemove(const char *path);
+int    tsdbInsertData(STsdb *pTsdb, void *);
 
 // STsdbOptions
 int  tsdbOptionsInit(STsdbOptions *);
diff --git a/include/util/mallocator.h b/include/util/mallocator.h
index fd66811f38..ffe242017e 100644
--- a/include/util/mallocator.h
+++ b/include/util/mallocator.h
@@ -22,10 +22,10 @@
 extern "C" {
 #endif
 
-typedef struct SMemAllocator SMemAllocator;
+typedef struct SMemAllocator        SMemAllocator;
+typedef struct SMemAllocatorFactory SMemAllocatorFactory;
 
 struct SMemAllocator {
-  char  name[16];
   void *impl;
   void *(*malloc)(SMemAllocator *, uint64_t size);
   void *(*calloc)(SMemAllocator *, uint64_t nmemb, uint64_t size);
@@ -34,11 +34,11 @@ struct SMemAllocator {
   uint64_t (*usage)(SMemAllocator *);
 };
 
-typedef struct {
+struct SMemAllocatorFactory {
   void *impl;
-  SMemAllocator *(*create)();
-  void (*destroy)(SMemAllocator *);
-} SMemAllocatorFactory;
+  SMemAllocator *(*create)(SMemAllocatorFactory *);
+  void (*destroy)(SMemAllocatorFactory *, SMemAllocator *);
+};
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/vnode/impl/inc/vnodeStateMgr.h b/source/dnode/vnode/impl/inc/vnodeStateMgr.h
index a32f682846..788426e25e 100644
--- a/source/dnode/vnode/impl/inc/vnodeStateMgr.h
+++ b/source/dnode/vnode/impl/inc/vnodeStateMgr.h
@@ -21,6 +21,9 @@ extern "C" {
 #endif
 
 typedef struct {
+  uint64_t processed;
+  uint64_t committed;
+  uint64_t applied;
 } SVState;
 
 #ifdef __cplusplus
diff --git a/source/dnode/vnode/impl/src/vnodeBufferPool.c b/source/dnode/vnode/impl/src/vnodeBufferPool.c
index eba71b5ba3..07dc56db95 100644
--- a/source/dnode/vnode/impl/src/vnodeBufferPool.c
+++ b/source/dnode/vnode/impl/src/vnodeBufferPool.c
@@ -19,9 +19,12 @@
 #define VNODE_BUF_POOL_SHARDS 3
 
 struct SVBufPool {
+  // buffer pool impl
   SList      free;
   SList      incycle;
   SListNode *inuse;
+  // MAF for submodules
+  SMemAllocatorFactory maf;
 };
 
 typedef enum {
@@ -49,6 +52,11 @@ typedef struct {
   SVArenaNode  node;
 } SVArenaAllocator;
 
+typedef struct {
+  SVnode *   pVnode;
+  SListNode *pNode;
+} SVMAWrapper;
+
 typedef struct {
   T_REF_DECLARE()
   uint64_t        capacity;
@@ -59,8 +67,10 @@ typedef struct {
   };
 } SVMemAllocator;
 
-static SListNode *vBufPoolNewNode(uint64_t capacity, EVMemAllocatorT type);
-static void       vBufPoolFreeNode(SListNode *pNode);
+static SListNode *    vBufPoolNewNode(uint64_t capacity, EVMemAllocatorT type);
+static void           vBufPoolFreeNode(SListNode *pNode);
+static SMemAllocator *vBufPoolCreateMA(SMemAllocatorFactory *pmaf);
+static void           vBufPoolDestroyMA(SMemAllocatorFactory *pmaf, SMemAllocator *pma);
 
 int vnodeOpenBufPool(SVnode *pVnode) {
   uint64_t        capacity;
@@ -89,6 +99,10 @@ int vnodeOpenBufPool(SVnode *pVnode) {
     tdListAppendNode(&(pVnode->pBufPool->free), pNode);
   }
 
+  pVnode->pBufPool->maf.impl = pVnode;
+  pVnode->pBufPool->maf.create = vBufPoolCreateMA;
+  pVnode->pBufPool->maf.destroy = vBufPoolDestroyMA;
+
   return 0;
 }
 
@@ -185,4 +199,82 @@ static void vBufPoolFreeNode(SListNode *pNode) {
   }
 
   free(pNode);
+}
+
+static void *vBufPoolMalloc(SMemAllocator *pma, uint64_t size) {
+  SVMAWrapper *   pvmaw = (SVMAWrapper *)(pma->impl);
+  SVMemAllocator *pvma = (SVMemAllocator *)(pvmaw->pNode->data);
+  void *          ptr = NULL;
+
+  if (pvma->type == E_V_ARENA_ALLOCATOR) {
+    SVArenaAllocator *pvaa = &(pvma->vaa);
+
+    if (POINTER_DISTANCE(pvaa->inuse->ptr, pvaa->inuse->data) + size > pvaa->inuse->size) {
+      SVArenaNode *pNode = (SVArenaNode *)malloc(sizeof(*pNode) + MAX(size, pvaa->ssize));
+      if (pNode == NULL) {
+        // TODO: handle error
+        return NULL;
+      }
+
+      pNode->prev = pvaa->inuse;
+      pNode->size = MAX(size, pvaa->ssize);
+      pNode->ptr = pNode->data;
+
+      pvaa->inuse = pNode;
+    }
+
+    ptr = pvaa->inuse->ptr;
+    pvaa->inuse->ptr = POINTER_SHIFT(ptr, size);
+  } else if (pvma->type == E_V_HEAP_ALLOCATOR) {
+    /* TODO */
+  }
+
+  return NULL;
+}
+
+static SMemAllocator *vBufPoolCreateMA(SMemAllocatorFactory *pmaf) {
+  SVnode *        pVnode;
+  SMemAllocator * pma;
+  SVMemAllocator *pvma;
+  SVMAWrapper *   pvmaw;
+
+  pVnode = (SVnode *)(pmaf->impl);
+  pma = (SMemAllocator *)calloc(1, sizeof(*pma) + sizeof(SVMAWrapper));
+  if (pma == NULL) {
+    // TODO: handle error
+    return NULL;
+  }
+  pvmaw = (SVMAWrapper *)POINTER_SHIFT(pma, sizeof(*pma));
+
+  // No allocator used currently
+  if (pVnode->pBufPool->inuse == NULL) {
+    while (listNEles(&(pVnode->pBufPool->free)) == 0) {
+      // TODO: wait until all released ro kill query
+      // tsem_wait();
+      ASSERT(0);
+    }
+
+    pVnode->pBufPool->inuse = tdListPopHead(&(pVnode->pBufPool->free));
+    pvma = (SVMemAllocator *)(pVnode->pBufPool->inuse->data);
+    T_REF_INIT_VAL(pvma, 1);
+  } else {
+    pvma = (SVMemAllocator *)(pVnode->pBufPool->inuse->data);
+  }
+
+  T_REF_INC(pvma);
+
+  pvmaw->pVnode = pVnode;
+  pvmaw->pNode = pVnode->pBufPool->inuse;
+
+  pma->impl = pvmaw;
+  pma->malloc = vBufPoolMalloc;
+  pma->calloc = NULL;  /* TODO */
+  pma->realloc = NULL; /* TODO */
+  pma->free = NULL;    /* TODO */
+  pma->usage = NULL;   /* TODO */
+
+  return pma;
+}
+
+static void vBufPoolDestroyMA(SMemAllocatorFactory *pmaf, SMemAllocator *pma) { /* TODO */
 }
\ No newline at end of file
diff --git a/source/dnode/vnode/impl/src/vnodeWrite.c b/source/dnode/vnode/impl/src/vnodeWrite.c
index 810ac570bc..f858309c66 100644
--- a/source/dnode/vnode/impl/src/vnodeWrite.c
+++ b/source/dnode/vnode/impl/src/vnodeWrite.c
@@ -21,46 +21,32 @@ int vnodeProcessWMsgs(SVnode *pVnode, SArray *pMsgs) {
 }
 
 int vnodeApplyWMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
-#if 0
-  int      reqType;        /* TODO */
-  size_t   reqSize;        /* TODO */
-  uint64_t reqVersion = 0; /* TODO */
-  int      code = 0;
+  // TODO
+  int code = 0;
 
-  // Copy the request to vnode buffer
-  void *pReq = mMalloc(pVnode->inuse, reqSize);
-  if (pReq == NULL) {
-    // TODO: handle error
-  }
-
-  memcpy(pReq, pMsg, reqSize);
-
-  // Push the request to TQ so consumers can consume
-  tqPushMsg(pVnode->pTq, pReq, 0);
-
-  // Process the request
-  switch (reqType) {
+  switch (pMsg->msgType) {
     case TSDB_MSG_TYPE_CREATE_TABLE:
-      code = metaCreateTable(pVnode->pMeta, NULL /* TODO */);
+      if (metaCreateTable(pVnode->pMeta, pMsg->pCont) < 0) {
+        /* TODO */
+        return -1;
+      }
       break;
     case TSDB_MSG_TYPE_DROP_TABLE:
-      code = metaDropTable(pVnode->pMeta, 0 /* TODO */);
+      if (metaDropTable(pVnode->pMeta, pMsg->pCont) < 0) {
+        /* TODO */
+        return -1;
+      }
       break;
     case TSDB_MSG_TYPE_SUBMIT:
-      /* TODO */
+      if (tsdbInsertData(pVnode->pTsdb, pMsg->pCont) < 0) {
+        /* TODO */
+        return -1;
+      }
       break;
     default:
       break;
   }
 
-  if (vnodeShouldCommit(pVnode)) {
-    if (vnodeAsyncCommit(pVnode) < 0) {
-      // TODO: handle error
-    }
-  }
-
-  return code;
-#endif
   return 0;
 }