diff --git a/source/dnode/vnode/CMakeLists.txt b/source/dnode/vnode/CMakeLists.txt
index ba01a57fea..8dc3f46ae3 100644
--- a/source/dnode/vnode/CMakeLists.txt
+++ b/source/dnode/vnode/CMakeLists.txt
@@ -39,8 +39,6 @@ target_sources(
 
     # tsdb
     "src/tsdb/tsdbCommit.c"
-    "src/tsdb/tsdbCommit2.c"
-    "src/tsdb/tsdbMerge.c"
     "src/tsdb/tsdbFile.c"
     "src/tsdb/tsdbFS.c"
     "src/tsdb/tsdbOpen.c"
diff --git a/source/dnode/vnode/src/tsdb/tsdbCommit2.c b/source/dnode/vnode/src/tsdb/dev/tsdbCommit2.c
similarity index 53%
rename from source/dnode/vnode/src/tsdb/tsdbCommit2.c
rename to source/dnode/vnode/src/tsdb/dev/tsdbCommit2.c
index 77495e59ac..04a29fe76e 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCommit2.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbCommit2.c
@@ -18,7 +18,6 @@
 typedef struct {
   STsdb *pTsdb;
   // config
-  int64_t commitID;
   int32_t minutes;
   int8_t  precision;
   int32_t minRow;
@@ -27,11 +26,12 @@ typedef struct {
   int8_t  sttTrigger;
   SArray *aTbDataP;
   // context
-  TSKEY      nextKey;  // reset by each table commit
+  TSKEY      nextKey;
   int32_t    fid;
   int32_t    expLevel;
   TSKEY      minKey;
   TSKEY      maxKey;
+  int64_t    cid;  // commit id
   SSkmInfo   skmTable;
   SSkmInfo   skmRow;
   SBlockData bData;
@@ -48,13 +48,89 @@ static int32_t tsdbRowIsDeleted(SCommitter *pCommitter, TSDBROW *pRow) {
 
 static int32_t tsdbCommitTimeSeriesData(SCommitter *pCommitter) {
   int32_t code = 0;
-  int32_t lino = 0;
+  int32_t lino;
 
-  // TODO
+  SMemTable *pMem = pCommitter->pTsdb->imem;
+
+  if (pMem->nRow == 0) goto _exit;
+
+  for (int32_t iTbData = 0; iTbData < taosArrayGetSize(pCommitter->aTbDataP); iTbData++) {
+    STbData *pTbData = (STbData *)taosArrayGetP(pCommitter->aTbDataP, iTbData);
+
+    // TODO: prepare commit next table
+
+    STbDataIter iter;
+    TSDBKEY     from = {.ts = pCommitter->minKey, .version = VERSION_MIN};
+    tsdbTbDataIterOpen(pTbData, &from, 0, &iter);
+
+    for (TSDBROW *pRow; (pRow = tsdbTbDataIterGet(&iter)) != NULL; tsdbTbDataIterNext(&iter)) {
+      TSDBKEY rowKey = TSDBROW_KEY(pRow);
+
+      if (rowKey.ts > pCommitter->maxKey) {
+        pCommitter->nextKey = TMIN(rowKey.ts, pCommitter->nextKey);
+        break;
+      }
+
+      if (pRow->type == TSDBROW_ROW_FMT) {
+        // code = tsdbUpdateSkmInfo(&pCommitter->skmRow, pTbData->suid, pTbData->uid, TSDBROW_SVERSION(pRow));
+        TSDB_CHECK_CODE(code, lino, _exit);
+      }
+
+      code = tBlockDataAppendRow(&pCommitter->bData, pRow, pCommitter->skmRow.pTSchema, pTbData->uid);
+      TSDB_CHECK_CODE(code, lino, _exit);
+
+      if (pCommitter->bData.nRow >= pCommitter->maxRow) {
+        // code = tsdbWriteSttBlock(pCommitter);
+        TSDB_CHECK_CODE(code, lino, _exit);
+
+        tBlockDataClear(&pCommitter->bData);
+      }
+    }
+  }
 
 _exit:
   if (code) {
     tsdbError("vgId:%d failed at line %d since %s", TD_VID(pCommitter->pTsdb->pVnode), lino, tstrerror(code));
+  } else {
+    tsdbDebug("vgId:%d %s done, fid:%d nRow:%" PRId64, TD_VID(pCommitter->pTsdb->pVnode), __func__, pCommitter->fid,
+              pMem->nRow);
+  }
+  return code;
+}
+
+static int32_t tsdbCommitTombstoneData(SCommitter *pCommitter) {
+  int32_t code = 0;
+  int32_t lino;
+
+  SMemTable *pMem = pCommitter->pTsdb->imem;
+
+  if (pMem->nDel == 0) goto _exit;
+
+  for (int32_t iTbData = 0; iTbData < taosArrayGetSize(pCommitter->aTbDataP); iTbData++) {
+    STbData *pTbData = (STbData *)taosArrayGetP(pCommitter->aTbDataP, iTbData);
+
+    if (pTbData->pHead == NULL) continue;
+
+    for (SDelData *pDelData = pTbData->pHead; pDelData; pDelData = pDelData->pNext) {
+      if (pDelData->sKey > pCommitter->maxKey || pDelData->eKey < pCommitter->minKey) continue;
+
+      // code = tsdbAppendDelData(pCommitter, pTbData->suid, pTbData->uid, TMAX(pDelData->sKey, pCommitter->minKey),
+      //                          TMIN(pDelData->eKey, pCommitter->maxKey), pDelData->version);
+      TSDB_CHECK_CODE(code, lino, _exit);
+
+      if (/* TODO */ 0 > pCommitter->maxRow) {
+        // code = tsdbWriteDelBlock(pCommitter);
+        TSDB_CHECK_CODE(code, lino, _exit);
+      }
+    }
+  }
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d failed at line %d since %s", TD_VID(pCommitter->pTsdb->pVnode), lino, tstrerror(code));
+  } else {
+    tsdbDebug("vgId:%d %s done, fid:%d nDel:%" PRId64, TD_VID(pCommitter->pTsdb->pVnode), __func__, pCommitter->fid,
+              pMem->nDel);
   }
   return code;
 }
@@ -72,19 +148,62 @@ _exit:
   return code;
 }
 
-static int32_t tsdbCommitNextFSet(SCommitter *pCommitter, int8_t *done) {
+static int32_t tsdbCommitFSetStart(SCommitter *pCommitter) {
+  int32_t code = 0;
+  int32_t lino = 0;
+
+  pCommitter->fid = tsdbKeyFid(pCommitter->nextKey, pCommitter->minutes, pCommitter->precision);
+  tsdbFidKeyRange(pCommitter->fid, pCommitter->minutes, pCommitter->precision, &pCommitter->minKey,
+                  &pCommitter->maxKey);
+  pCommitter->expLevel = tsdbFidLevel(pCommitter->fid, &pCommitter->pTsdb->keepCfg, taosGetTimestampSec());
+#if 0
+  // pCommitter->cid = tsdbFileSetNextCid(STsdb * pTsdb, pCommitter->fid);
+#else
+  pCommitter->cid = 0;
+#endif
+
+  // TODO
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d failed at line %d since %s", TD_VID(pCommitter->pTsdb->pVnode), lino, tstrerror(code));
+  }
+  return code;
+}
+
+static int32_t tsdbCommitFSetEnd(SCommitter *pCommitter) {
+  int32_t code = 0;
+  int32_t lino = 0;
+
+  // TODO
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d failed at line %d since %s", TD_VID(pCommitter->pTsdb->pVnode), lino, tstrerror(code));
+  }
+  return code;
+}
+
+static int32_t tsdbCommitNextFSet(SCommitter *pCommitter) {
   int32_t code = 0;
   int32_t lino = 0;
 
   STsdb *pTsdb = pCommitter->pTsdb;
 
-  // fset commit start (TODO)
+  // fset commit start
+  code = tsdbCommitFSetStart(pCommitter);
+  TSDB_CHECK_CODE(code, lino, _exit);
 
   // commit fset
   code = tsdbCommitTimeSeriesData(pCommitter);
   TSDB_CHECK_CODE(code, lino, _exit);
 
-  // fset commit end (TODO)
+  code = tsdbCommitTombstoneData(pCommitter);
+  TSDB_CHECK_CODE(code, lino, _exit);
+
+  // fset commit end
+  code = tsdbCommitFSetEnd(pCommitter);
+  TSDB_CHECK_CODE(code, lino, _exit);
 
 _exit:
   if (code) {
@@ -140,12 +259,11 @@ int32_t tsdbCommitBegin(STsdb *pTsdb, SCommitInfo *pInfo) {
     tsdbUnrefMemTable(pMem, NULL, true);
   } else {
     SCommitter committer;
-    int8_t     done = 0;
 
     code = tsdbCommitterOpen(pTsdb, pInfo, &committer);
     TSDB_CHECK_CODE(code, lino, _exit);
 
-    while (!done && (code = tsdbCommitNextFSet(&committer, &done))) {
+    while (committer.nextKey != TSKEY_MAX && (code = tsdbCommitNextFSet(&committer))) {
     }
 
     code = tsdbCommitterClose(&committer, code);
diff --git a/source/dnode/vnode/src/tsdb/tsdbMerge.c b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
similarity index 100%
rename from source/dnode/vnode/src/tsdb/tsdbMerge.c
rename to source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbReaderWriter2.c b/source/dnode/vnode/src/tsdb/dev/tsdbReaderWriter2.c
new file mode 100644
index 0000000000..1f78d23580
--- /dev/null
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbReaderWriter2.c
@@ -0,0 +1,63 @@
+#include "tsdb.h"
+
+typedef struct SSttFWriter SSttFWriter;
+typedef struct SSttFReader SSttFReader;
+
+extern int32_t tsdbOpenFile(const char *path, int32_t szPage, int32_t flag, STsdbFD **ppFD);
+extern void    tsdbCloseFile(STsdbFD **ppFD);
+struct SSttFWriter {
+  STsdb   *pTsdb;
+  STsdbFD *pFd;
+  SSttFile file;
+};
+
+int32_t tsdbSttFWriterOpen(STsdb *pTsdb, SSttFile *pSttFile, SSttFWriter **ppWritter) {
+  int32_t code = 0;
+  int32_t lino = 0;
+
+  int32_t szPage = pTsdb->pVnode->config.tsdbPageSize;
+  int32_t flag = TD_FILE_READ | TD_FILE_WRITE | TD_FILE_CREATE | TD_FILE_TRUNC;  // TODO
+
+  ppWritter[0] = taosMemoryCalloc(1, sizeof(SSttFWriter));
+  if (ppWritter[0] == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
+
+  ppWritter[0]->pTsdb = pTsdb;
+  ppWritter[0]->file = pSttFile[0];
+
+  code = tsdbOpenFile(NULL, szPage, flag, &ppWritter[0]->pFd);
+  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));
+  }
+  return 0;
+}
+
+int32_t tsdbSttFWriterClose(SSttFWriter *pWritter) {
+  // TODO
+  return 0;
+}
+
+int32_t tsdbWriteSttBlockData(SSttFWriter *pWritter, SBlockData *pBlockData, SSttBlk *pSttBlk) {
+  // TODO
+  return 0;
+}
+
+int32_t tsdbWriteSttBlockIdx(SSttFWriter *pWriter, SArray *aSttBlk) {
+  // TODO
+  return 0;
+}
+
+int32_t tsdbWriteSttDelData(SSttFWriter *pWriter) {
+  // TODO
+  return 0;
+}
+
+int32_t tsdbWriteSttDelIdx(SSttFWriter *pWriter) {
+  // TODO
+  return 0;
+}
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
index 50fd9d7aa7..75d12a3b32 100644
--- a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
@@ -16,7 +16,7 @@
 #include "tsdb.h"
 
 // =============== PAGE-WISE FILE ===============
-static int32_t tsdbOpenFile(const char *path, int32_t szPage, int32_t flag, STsdbFD **ppFD) {
+int32_t tsdbOpenFile(const char *path, int32_t szPage, int32_t flag, STsdbFD **ppFD) {
   int32_t  code = 0;
   STsdbFD *pFD = NULL;
 
@@ -68,7 +68,7 @@ _exit:
   return code;
 }
 
-static void tsdbCloseFile(STsdbFD **ppFD) {
+void tsdbCloseFile(STsdbFD **ppFD) {
   STsdbFD *pFD = *ppFD;
   if (pFD) {
     taosMemoryFree(pFD->pBuf);