diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
index a3d6fc2faf0f5b59a933eab0c3e421e7e1b4d32e..db78db2e287105a36cfe3c30e3e6d59735d64b62 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
@@ -262,6 +262,11 @@ static int32_t open_committer(STsdb *pTsdb, SCommitInfo *pInfo, SCommitter *pCom
     code = TSDB_CODE_OUT_OF_MEMORY;
     TSDB_CHECK_CODE(code, lino, _exit);
   }
+  pCommitter->aFileOp = taosArrayInit(10, sizeof(struct SFileOp));
+  if (pCommitter->aFileOp == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
 
   // start loop
   pCommitter->nextKey = pTsdb->imem->minKey;  // TODO
@@ -277,7 +282,12 @@ _exit:
 
 static int32_t close_committer(SCommitter *pCommiter, int32_t eno) {
   int32_t code = 0;
-  // TODO
+  int32_t lino;
+
+  // code = tsdbFSBegin(pCommiter->pTsdb, pCommiter->aFileOp);
+  TSDB_CHECK_CODE(code, lino, _exit);
+
+_exit:
   return code;
 }
 
@@ -327,49 +337,49 @@ _exit:
   return code;
 }
 
-int32_t tsdbCommitCommit(STsdb *pTsdb) {
-  int32_t    code = 0;
-  int32_t    lino = 0;
-  SMemTable *pMemTable = pTsdb->imem;
-
-  // lock
-  taosThreadRwlockWrlock(&pTsdb->rwLock);
-
-  code = tsdbFSCommit(pTsdb);
-  if (code) {
-    taosThreadRwlockUnlock(&pTsdb->rwLock);
-    TSDB_CHECK_CODE(code, lino, _exit);
-  }
-
-  pTsdb->imem = NULL;
-
-  // unlock
-  taosThreadRwlockUnlock(&pTsdb->rwLock);
-  if (pMemTable) {
-    tsdbUnrefMemTable(pMemTable, NULL, true);
-  }
-
-_exit:
-  if (code) {
-    tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, lino, tstrerror(code));
-  } else {
-    tsdbInfo("vgId:%d, tsdb finish commit", TD_VID(pTsdb->pVnode));
-  }
-  return code;
-}
-
-int32_t tsdbCommitAbort(STsdb *pTsdb) {
-  int32_t code = 0;
-  int32_t lino = 0;
-
-  code = tsdbFSRollback(pTsdb);
-  TSDB_CHECK_CODE(code, lino, _exit);
-
-_exit:
-  if (code) {
-    tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, lino, tstrerror(code));
-  } else {
-    tsdbInfo("vgId:%d, tsdb rollback commit", TD_VID(pTsdb->pVnode));
-  }
-  return code;
-}
\ No newline at end of file
+// int32_t tsdbCommitCommit(STsdb *pTsdb) {
+//   int32_t    code = 0;
+//   int32_t    lino = 0;
+//   SMemTable *pMemTable = pTsdb->imem;
+
+//   // lock
+//   taosThreadRwlockWrlock(&pTsdb->rwLock);
+
+//   code = tsdbFSCommit(pTsdb);
+//   if (code) {
+//     taosThreadRwlockUnlock(&pTsdb->rwLock);
+//     TSDB_CHECK_CODE(code, lino, _exit);
+//   }
+
+//   pTsdb->imem = NULL;
+
+//   // unlock
+//   taosThreadRwlockUnlock(&pTsdb->rwLock);
+//   if (pMemTable) {
+//     tsdbUnrefMemTable(pMemTable, NULL, true);
+//   }
+
+// _exit:
+//   if (code) {
+//     tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, lino, tstrerror(code));
+//   } else {
+//     tsdbInfo("vgId:%d, tsdb finish commit", TD_VID(pTsdb->pVnode));
+//   }
+//   return code;
+// }
+
+// int32_t tsdbCommitAbort(STsdb *pTsdb) {
+//   int32_t code = 0;
+//   int32_t lino = 0;
+
+//   code = tsdbFSRollback(pTsdb);
+//   TSDB_CHECK_CODE(code, lino, _exit);
+
+// _exit:
+//   if (code) {
+//     tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, lino, tstrerror(code));
+//   } else {
+//     tsdbInfo("vgId:%d, tsdb rollback commit", TD_VID(pTsdb->pVnode));
+//   }
+//   return code;
+// }
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFS.h b/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
index eb9dcc6dab5c257983dd387b6f2de0f714e254e4..eeac3a140452d5cbccf296798176a902a3355931 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
@@ -26,8 +26,11 @@ extern "C" {
 struct STFileSystem;
 
 /* Exposed APIs */
+// open/close
 int32_t tsdbOpenFileSystem(STsdb *pTsdb, struct STFileSystem **ppFS, int8_t rollback);
 int32_t tsdbCloseFileSystem(struct STFileSystem **ppFS);
+// txn
+// int32_t tsdb
 
 /* Exposed Structs */
 struct STFileSystem {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c
index 6dea4a4e57392be988126c579648f39a8270b9bf..ab07f48dfddd244a64c5a265c84aef8e31978b51 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c
@@ -11,4 +11,18 @@
  *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
\ No newline at end of file
+ */
+
+#include "tsdbSttFReader.h"
+
+int32_t tsdbSttFReaderOpen(const struct SSttFReaderConf *pConf, struct SSttFReader **ppReader) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
+
+int32_t tsdbSttFReaderClose(struct SSttFReader *pReader) {
+  int32_t code = 0;
+  // TODO
+  return code;
+}
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h
index f7396595707092378fd78917a7c04291a2b7a812..bda94a96a3602d08056da8cfd1d9a786789500a2 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h
@@ -16,15 +16,24 @@
 #ifndef _TD_TSDB_STT_FILE_READER_H
 #define _TD_TSDB_STT_FILE_READER_H
 
+#include "tsdb.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /* Exposed Handle */
+struct SSttFReader;
+struct SSttFReaderConf;
 
 /* Exposed APIs */
+int32_t tsdbSttFReaderOpen(const struct SSttFReaderConf *pConf, struct SSttFReader **ppReader);
+int32_t tsdbSttFReaderClose(struct SSttFReader *pReader);
 
 /* Exposed Structs */
+struct SSttFReaderConf {
+  // TODO
+};
 
 #ifdef __cplusplus
 }