diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
index 4c328d472b..31195d20d7 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
@@ -333,7 +333,7 @@ static int32_t open_committer(STsdb *pTsdb, SCommitInfo *pInfo, SCommitter *pCom
   pCommitter->minRow = pInfo->info.config.tsdbCfg.minRows;
   pCommitter->maxRow = pInfo->info.config.tsdbCfg.maxRows;
   pCommitter->cmprAlg = pInfo->info.config.tsdbCfg.compression;
-  pCommitter->sttTrigger = 2;  // TODO
+  pCommitter->sttTrigger = 1;  // TODO
 
   pCommitter->aTbDataP = tsdbMemTableGetTbDataArray(pTsdb->imem);
   pCommitter->aFileOp = taosArrayInit(16, sizeof(STFileOp));
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFS.c b/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
index b99d25be8a..d7b85e7bc0 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
@@ -240,6 +240,14 @@ _exit:
   return code;
 }
 
+static bool is_same_file(const STFile *f1, const STFile f2) {
+  if (f1->type != f2.type) return false;
+  if (f1->did.level != f2.did.level) return false;
+  if (f1->did.id != f2.did.id) return false;
+  if (f1->cid != f2.cid) return false;
+  return true;
+}
+
 static int32_t apply_commit_add_fset(STFileSystem *fs, const STFileSet *fset) {
   int32_t idx = taosArraySearchIdx(fs->cstate, fset, (__compar_fn_t)tsdbFSetCmprFn, TD_GT);
   if (idx < 0) idx = taosArrayGetSize(fs->cstate);
@@ -258,6 +266,22 @@ static int32_t apply_commit_del_fset(STFileSystem *fs, const STFileSet *fset) {
   return 0;
 }
 static int32_t apply_commit_upd_fset(STFileSystem *fs, STFileSet *fset_from, const STFileSet *fset_to) {
+  for (tsdb_ftype_t ftype = TSDB_FTYPE_HEAD; ftype < TSDB_FTYPE_MAX; ++ftype) {
+    STFileObj *fobj_from = fset_from->farr[ftype];
+    STFileObj *fobj_to = fset_to->farr[ftype];
+
+    if (!fobj_from && !fobj_to) continue;
+
+    // TODO
+    ASSERT(0);
+    if (fobj_from && fobj_to) {
+      // TODO
+    } else if (fobj_from) {
+      // TODO
+    } else {
+      // TODO
+    }
+  }
   // TODO
   ASSERT(0);
   return 0;
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
index 31c4d29139..0f4c9397c4 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
@@ -533,6 +533,7 @@ int32_t tsdbSttFWriterClose(SSttFileWriter **ppWriter, int8_t abort, struct STFi
   int32_t lino = 0;
 
   if (!abort) {
+    ppWriter[0]->tFile.stt.nseg++;
     if (ppWriter[0]->bData.nRow > 0) {
       code = write_timeseries_block(ppWriter[0]);
       TSDB_CHECK_CODE(code, lino, _exit);