diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFileRW.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFileRW.h
index 0f8be95d4f..d15cf387ac 100644
--- a/source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFileRW.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFileRW.h
@@ -14,6 +14,7 @@
  */
 
 #include "tsdbDef.h"
+#include "tsdbFSet.h"
 
 #ifndef _TSDB_DATA_FILE_RW_H
 #define _TSDB_DATA_FILE_RW_H
@@ -26,24 +27,19 @@ extern "C" {
 typedef struct SDataFileReader       SDataFileReader;
 typedef struct SDataFileReaderConfig SDataFileReaderConfig;
 
+int32_t tsdbDataFileReaderOpen(const char *fname, const SDataFileReaderConfig *config, SDataFileReader **reader);
+int32_t tsdbDataFileReaderClose(SDataFileReader *reader);
+
 // SDataFileWriter =============================================
-typedef struct SDataFileWriter       SDataFileWriter;
-typedef struct SDataFileWriterConfig SDataFileWriterConfig;
+typedef struct SDataFileWriter SDataFileWriter;
+typedef struct SDataFileWriterConfig {
+  STsdb *tsdb;
+} SDataFileWriterConfig;
 
 int32_t tsdbDataFileWriterOpen(const SDataFileWriterConfig *config, SDataFileWriter **writer);
-int32_t tsdbDataFileWriterClose(SDataFileWriter *writer);
+int32_t tsdbDataFileWriterClose(SDataFileWriter **writer, bool abort, STFileOp op[/*TSDB_FTYPE_MAX*/]);
 int32_t tsdbDataFileWriteTSData(SDataFileWriter *writer, SBlockData *bData);
-int32_t tsdbDataFileWriteTSDataBlock(SDataFileWriter *writer, SBlockData *bData);
-
-struct SDataFileReaderConfig {
-  STsdb *pTsdb;
-  // TODO
-};
-
-struct SDataFileWriterConfig {
-  STsdb *pTsdb;
-  //   TODO
-};
+// int32_t tsdbDataFileWriteDelData(SDataFileWriter *writer, SBlockData *bData);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFileRW.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFileRW.h
index e3c24f7716..ae68cc3efb 100644
--- a/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFileRW.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFileRW.h
@@ -34,7 +34,7 @@ typedef struct SSttSegReader        SSttSegReader;
 typedef TARRAY2(SSttSegReader *) TSttSegReaderArray;
 
 // SSttFileReader
-int32_t tsdbSttFReaderOpen(const SSttFileReaderConfig *config, SSttFileReader **reader);
+int32_t tsdbSttFReaderOpen(const char *fname, const SSttFileReaderConfig *config, SSttFileReader **reader);
 int32_t tsdbSttFReaderClose(SSttFileReader **reader);
 int32_t tsdbSttFReaderGetSegReader(SSttFileReader *reader, const TSttSegReaderArray **readerArray);
 
diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h
index b814af89fb..c591960a8e 100644
--- a/source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h
@@ -24,8 +24,9 @@ extern "C" {
 
 // SDelBlock ----------
 
+#define DEL_RECORD_NUM_ELEM 5
 typedef union {
-  int64_t aData[5];
+  int64_t aData[DEL_RECORD_NUM_ELEM];
   struct {
     int64_t suid;
     int64_t uid;
@@ -36,7 +37,7 @@ typedef union {
 } SDelRecord;
 
 typedef union {
-  TARRAY2(int64_t) aData[5];
+  TARRAY2(int64_t) aData[DEL_RECORD_NUM_ELEM];
   struct {
     TARRAY2(int64_t) suid[1];
     TARRAY2(int64_t) uid[1];
@@ -48,11 +49,12 @@ typedef union {
 
 typedef struct SDelBlk {
   int32_t   nRow;
+  int32_t   size[DEL_RECORD_NUM_ELEM];
   TABLEID   minTid;
   TABLEID   maxTid;
   int64_t   minVer;
   int64_t   maxVer;
-  SFDataPtr dp;
+  SFDataPtr dp[1];
 } SDelBlk;
 
 #define DEL_BLOCK_SIZE(db) TARRAY2_SIZE((db)->suid)
@@ -65,8 +67,9 @@ int32_t tDelBlockEncode(SDelBlock *delBlock, void *buf, int32_t size);
 int32_t tDelBlockDecode(const void *buf, SDelBlock *delBlock);
 
 // STbStatisBlock ----------
+#define STATIS_RECORD_NUM_ELEM 9
 typedef union {
-  int64_t aData[9];
+  int64_t aData[STATIS_RECORD_NUM_ELEM];
   struct {
     int64_t suid;
     int64_t uid;
@@ -81,7 +84,7 @@ typedef union {
 } STbStatisRecord;
 
 typedef union {
-  TARRAY2(int64_t) aData[9];
+  TARRAY2(int64_t) aData[STATIS_RECORD_NUM_ELEM];
   struct {
     TARRAY2(int64_t) suid[1];
     TARRAY2(int64_t) uid[1];
@@ -97,7 +100,7 @@ typedef union {
 
 typedef struct STbStatisBlk {
   int32_t   numRec;
-  int32_t   size[9];
+  int32_t   size[STATIS_RECORD_NUM_ELEM];
   TABLEID   minTid;
   TABLEID   maxTid;
   int64_t   minVer;
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
index ac5ee17d8c..a211b2504e 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
@@ -272,8 +272,10 @@ static int32_t commit_fset_end(SCommitter *pCommitter) {
   code = tsdbSttFWriterClose(&pCommitter->pWriter, 0, &op);
   TSDB_CHECK_CODE(code, lino, _exit);
 
-  code = TARRAY2_APPEND(&pCommitter->opArray, op);
-  TSDB_CHECK_CODE(code, lino, _exit);
+  if (op.optype != TSDB_FOP_NONE) {
+    code = TARRAY2_APPEND(&pCommitter->opArray, op);
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
 
 _exit:
   if (code) {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbDataFileRW.c b/source/dnode/vnode/src/tsdb/dev/tsdbDataFileRW.c
index cd6cb94d2e..f956bf892b 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbDataFileRW.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbDataFileRW.c
@@ -22,53 +22,84 @@ struct SDataFileReader {
 
 // SDataFileWriter =============================================
 struct SDataFileWriter {
+  SDataFileWriterConfig config[1];
+  struct {
+    bool opened;
+  } ctx[1];
   // TODO
 };
 
-int32_t tsdbDataFileWriterOpen(const SDataFileWriterConfig *config, SDataFileWriter **ppWriter) {
+int32_t tsdbDataFileWriterOpen(const SDataFileWriterConfig *config, SDataFileWriter **writer) {
+  writer[0] = taosMemoryCalloc(1, sizeof(SDataFileWriter));
+  if (!writer[0]) return TSDB_CODE_OUT_OF_MEMORY;
+  writer[0]->ctx->opened = false;
+  return 0;
+}
+
+static int32_t tsdbDataFileWriterCloseCommit(SDataFileWriter *writer) {
+  // TODO
+  return 0;
+}
+static int32_t tsdbDataFileWriterCloseAbort(SDataFileWriter *writer) {
+  // TODO
+  return 0;
+}
+static int32_t tsdbDataFileWriterDoClose(SDataFileWriter *writer) {
+  // TODO
+  return 0;
+}
+static int32_t tsdbDataFileWriterCloseImpl(SDataFileWriter *writer, bool abort, STFileOp op[/*TSDB_FTYPE_MAX*/]) {
   int32_t code = 0;
   int32_t lino = 0;
-  int32_t vid = TD_VID(config->pTsdb->pVnode);
-// TODO
+  int32_t vid = TD_VID(writer->config->tsdb->pVnode);
+
+  if (!writer->ctx->opened) {
+    for (int32_t i = 0; i < TSDB_FTYPE_MAX; ++i) op[i].optype = TSDB_FOP_NONE;
+  } else {
+    if (abort) {
+      code = tsdbDataFileWriterCloseAbort(writer);
+      TSDB_CHECK_CODE(code, lino, _exit);
+    } else {
+      code = tsdbDataFileWriterCloseCommit(writer);
+      TSDB_CHECK_CODE(code, lino, _exit);
+    }
+    tsdbDataFileWriterDoClose(writer);
+  }
+  taosMemoryFree(writer);
+
 _exit:
   if (code) {
     tsdbError("vgId:%d %s failed at line %d since %s", vid, __func__, lino, tstrerror(code));
   }
   return code;
 }
+int32_t tsdbDataFileWriterClose(SDataFileWriter **writer, bool abort, STFileOp op[/*TSDB_FTYPE_MAX*/]) {
+  int32_t code = tsdbDataFileWriterCloseImpl(writer[0], abort, op);
+  if (code) {
+    return code;
+  } else {
+    writer[0] = NULL;
+    return 0;
+  }
+}
 
-int32_t tsdbDataFileWriterClose(SDataFileWriter *pWriter) {
+static int32_t tsdbDataFileWriterDoOpen(SDataFileWriter *writer) {
+  // TODO
+  return 0;
+}
+int32_t tsdbDataFileWriteTSData(SDataFileWriter *writer, SBlockData *bData) {
   int32_t code = 0;
   int32_t lino = 0;
-  int32_t vid = 0;  // TODO: TD_VID(config->pTsdb->pVnode);
-// TODO
+  int32_t vid = TD_VID(writer->config->tsdb->pVnode);
+
+  if (!writer->ctx->opened) {
+    code = tsdbDataFileWriterDoOpen(writer);
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
+
 _exit:
   if (code) {
     tsdbError("vgId:%d %s failed at line %d since %s", vid, __func__, lino, tstrerror(code));
   }
   return code;
 }
-
-int32_t tsdbDataFileWriteTSData(SDataFileWriter *pWriter, SBlockData *pBlockData) {
-  int32_t code = 0;
-  int32_t lino = 0;
-  int32_t vid = 0;  // TODO: TD_VID(config->pTsdb->pVnode);
-// TODO
-_exit:
-  if (code) {
-    tsdbError("vgId:%d %s failed at line %d since %s", vid, __func__, lino, tstrerror(code));
-  }
-  return code;
-}
-
-int32_t tsdbDataFileWriteTSDataBlock(SDataFileWriter *pWriter, SBlockData *pBlockData) {
-  int32_t code = 0;
-  int32_t lino = 0;
-  int32_t vid = 0;  // TODO: TD_VID(config->pTsdb->pVnode);
-// TODO
-_exit:
-  if (code) {
-    tsdbError("vgId:%d %s failed at line %d since %s", vid, __func__, lino, tstrerror(code));
-  }
-  return code;
-}
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
index d21823bd92..081cef46b1 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
@@ -202,7 +202,7 @@ static int32_t tsdbMergeFileSetBegin(SMerger *merger) {
           .tsdb = merger->tsdb,
           // TODO
       };
-      code = tsdbSttFReaderOpen(&config, &reader);
+      code = tsdbSttFReaderOpen(fobj->fname, &config, &reader);
       TSDB_CHECK_CODE(code, lino, _exit);
 
       code = TARRAY2_APPEND(&merger->sttReaderArr, reader);
@@ -259,7 +259,7 @@ static int32_t tsdbMergeFileSetBegin(SMerger *merger) {
   // open data file writer
   if (merger->ctx.toData) {
     SDataFileWriterConfig config = {
-        .pTsdb = merger->tsdb,
+        .tsdb = merger->tsdb,
         // TODO
     };
     code = tsdbDataFileWriterOpen(&config, &merger->dataWriter);
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFileRW.c b/source/dnode/vnode/src/tsdb/dev/tsdbSttFileRW.c
index 8d341f2823..3e538ded62 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFileRW.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbSttFileRW.c
@@ -84,7 +84,7 @@ static int32_t tsdbSttSegReaderClose(SSttSegReader **reader) {
   return 0;
 }
 
-int32_t tsdbSttFReaderOpen(const SSttFileReaderConfig *config, SSttFileReader **reader) {
+int32_t tsdbSttFReaderOpen(const char *fname, const SSttFileReaderConfig *config, SSttFileReader **reader) {
   int32_t code = 0;
   int32_t lino = 0;
   int32_t vid = TD_VID(config->tsdb->pVnode);
@@ -95,8 +95,6 @@ int32_t tsdbSttFReaderOpen(const SSttFileReaderConfig *config, SSttFileReader **
   reader[0]->config[0] = config[0];
 
   // open file
-  char fname[TSDB_FILENAME_LEN];
-  tsdbTFileName(config->tsdb, config->file, fname);
   code = tsdbOpenFile(fname, config->szPage, TD_FILE_READ, &reader[0]->fd);
   TSDB_CHECK_CODE(code, lino, _exit);
 
@@ -221,13 +219,60 @@ int32_t tsdbSttFReadSttBlock(SSttSegReader *reader, const SSttBlk *sttBlk, SBloc
 
 int32_t tsdbSttFReadDelBlock(SSttSegReader *reader, const SDelBlk *delBlk, SDelBlock *dData) {
   int32_t code = 0;
-  // TODO
+  int32_t lino = 0;
+  int32_t vid = TD_VID(reader->reader->config->tsdb->pVnode);
+
+  tDelBlockClear(dData);
+  code = tRealloc(&reader->reader->config->aBuf[0], delBlk->dp->size);
+  TSDB_CHECK_CODE(code, lino, _exit);
+
+  code = tsdbReadFile(reader->reader->fd, delBlk->dp->offset, reader->reader->config->aBuf[0], delBlk->dp->size);
+  if (code) TSDB_CHECK_CODE(code, lino, _exit);
+
+  int64_t size = 0;
+  for (int32_t i = 0; i < ARRAY_SIZE(dData->aData); ++i) {
+    code = tsdbDecmprData(reader->reader->config->aBuf[0] + size, delBlk->size[i], TSDB_DATA_TYPE_BIGINT,
+                          TWO_STAGE_COMP, NULL, 0, NULL);  // TODO
+    TSDB_CHECK_CODE(code, lino, _exit);
+
+    size += delBlk->size[i];
+  }
+
+  ASSERT(size == delBlk->dp->size);
+_exit:
+  if (code) {
+    tsdbError("vgId:%d %s failed at line %d, reason:%s", vid, __func__, lino, tstrerror(code));
+  }
   return code;
 }
 
 int32_t tsdbSttFReadStatisBlock(SSttSegReader *reader, const STbStatisBlk *statisBlk, STbStatisBlock *sData) {
   int32_t code = 0;
-  // TODO
+  int32_t lino = 0;
+  int32_t vid = TD_VID(reader->reader->config->tsdb->pVnode);
+
+  tStatisBlockClear(sData);
+  code = tRealloc(&reader->reader->config->aBuf[0], statisBlk->dp->size);
+  TSDB_CHECK_CODE(code, lino, _exit);
+
+  code = tsdbReadFile(reader->reader->fd, statisBlk->dp->offset, reader->reader->config->aBuf[0], statisBlk->dp->size);
+  if (code) TSDB_CHECK_CODE(code, lino, _exit);
+
+  int64_t size = 0;
+  for (int32_t i = 0; i < ARRAY_SIZE(sData->aData); ++i) {
+    code = tsdbDecmprData(reader->reader->config->aBuf[0] + size, statisBlk->size[i], TSDB_DATA_TYPE_BIGINT,
+                          TWO_STAGE_COMP, NULL, 0, NULL);  // TODO
+    TSDB_CHECK_CODE(code, lino, _exit);
+
+    size += statisBlk->size[i];
+  }
+
+  ASSERT(size == statisBlk->dp->size);
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d %s failed at line %d, reason:%s", vid, __func__, lino, tstrerror(code));
+  }
   return code;
 }