diff --git a/source/dnode/vnode/src/tsdb/dev/dev.h b/source/dnode/vnode/src/tsdb/dev/dev.h
index 36e5dbc625..fca0131073 100644
--- a/source/dnode/vnode/src/tsdb/dev/dev.h
+++ b/source/dnode/vnode/src/tsdb/dev/dev.h
@@ -22,26 +22,17 @@
 extern "C" {
 #endif
 
-typedef struct SFDataPtr {
-  int64_t offset;
-  int64_t size;
-} SFDataPtr;
+#include "inc/tsdbUtil.h"
 
-typedef struct {
-  int64_t   prevFooter;
-  SFDataPtr dict[4];  // 0:bloom filter, 1:SSttBlk, 2:STbStatisBlk, 3:SDelBlk
-  uint8_t   reserved[24];
-} SFSttFooter;
+#include "inc/tsdbFile.h"
 
-#include "tsdbUtil.h"
+#include "inc/tsdbFSet.h"
 
-#include "tsdbFile.h"
+#include "inc/tsdbFS.h"
 
-#include "tsdbFSet.h"
+#include "inc/tsdbSttFReaderWriter.h"
 
-#include "tsdbFS.h"
-
-#include "tsdbSttFWriter.h"
+#include "inc/tsdbDataFReaderWriter.h"
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFReaderWriter.h
similarity index 67%
rename from source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h
rename to source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFReaderWriter.h
index bda94a96a3..a931ac13d4 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbDataFReaderWriter.h
@@ -13,30 +13,25 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _TD_TSDB_STT_FILE_READER_H
-#define _TD_TSDB_STT_FILE_READER_H
+#include "tsdbDef.h"
 
-#include "tsdb.h"
+#ifndef _TD_TSDB_DATA_F_READER_WRITER_H_
+#define _TD_TSDB_DATA_F_READER_WRITER_H_
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /* Exposed Handle */
-struct SSttFReader;
-struct SSttFReaderConf;
+typedef struct SDataFReader SDataFReader;
+typedef struct SDataFWriter SDataFWriter;
 
 /* 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
 }
 #endif
 
-#endif /*_TD_TSDB_STT_FILE_READER_H*/
\ No newline at end of file
+#endif /*_TD_TSDB_DATA_F_READER_WRITER_H_*/
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbDef.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbDef.h
new file mode 100644
index 0000000000..f17dbcc605
--- /dev/null
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbDef.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * 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/>.
+ */
+
+#ifndef _TD_TSDB_DEF_H_
+#define _TD_TSDB_DEF_H_
+
+#include "tsdb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+typedef struct SFDataPtr {
+  int64_t offset;
+  int64_t size;
+} SFDataPtr;
+
+typedef struct {
+  int64_t   prevFooter;
+  SFDataPtr dict[4];  // 0:bloom filter, 1:SSttBlk, 2:STbStatisBlk, 3:SDelBlk
+  uint8_t   reserved[24];
+} SFSttFooter;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_TSDB_DEF_H_*/
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFS.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFS.h
similarity index 98%
rename from source/dnode/vnode/src/tsdb/dev/tsdbFS.h
rename to source/dnode/vnode/src/tsdb/dev/inc/tsdbFS.h
index 0e9428fdb4..3584cf7e0e 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFS.h
@@ -16,7 +16,7 @@
 #ifndef _TSDB_FILE_SYSTEM_H
 #define _TSDB_FILE_SYSTEM_H
 
-#include "tsdb.h"
+#include "tsdbDef.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFSet.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h
similarity index 98%
rename from source/dnode/vnode/src/tsdb/dev/tsdbFSet.h
rename to source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h
index effe8c0494..6fb973635c 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFSet.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h
@@ -16,7 +16,7 @@
 #ifndef _TSDB_FILE_SET_H
 #define _TSDB_FILE_SET_H
 
-#include "tsdb.h"
+#include "tsdbDef.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFile.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFile.h
similarity index 98%
rename from source/dnode/vnode/src/tsdb/dev/tsdbFile.h
rename to source/dnode/vnode/src/tsdb/dev/inc/tsdbFile.h
index c70a523636..2ccce655e9 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFile.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFile.h
@@ -16,7 +16,7 @@
 #ifndef _TSDB_FILE_H
 #define _TSDB_FILE_H
 
-#include "tsdb.h"
+#include "tsdbDef.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFWriter.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h
similarity index 98%
rename from source/dnode/vnode/src/tsdb/dev/tsdbSttFWriter.h
rename to source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h
index 6c199476f2..01009d54b6 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFWriter.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbSttFReaderWriter.h
@@ -16,7 +16,7 @@
 #ifndef _TSDB_STT_FILE_WRITER_H
 #define _TSDB_STT_FILE_WRITER_H
 
-#include "tsdbFile.h"
+#include "tsdbDef.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbUtil.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h
similarity index 99%
rename from source/dnode/vnode/src/tsdb/dev/tsdbUtil.h
rename to source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h
index 292f14395b..ed4de45736 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbUtil.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbUtil.h
@@ -16,7 +16,7 @@
 #ifndef _TSDB_UTIL_H
 #define _TSDB_UTIL_H
 
-#include "tsdb.h"
+#include "tsdbDef.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c b/source/dnode/vnode/src/tsdb/dev/tsdbDataFReaderWriter.c
similarity index 64%
rename from source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c
rename to source/dnode/vnode/src/tsdb/dev/tsdbDataFReaderWriter.c
index f975b91abd..433da91948 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbSttFReader.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbDataFReaderWriter.c
@@ -13,23 +13,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "tsdbSttFReader.h"
 #include "dev.h"
 
-struct SSttFReader {
-  STsdb      *pTsdb;
-  SFSttFooter footer;
-  const void *bloomFilter;
+struct SDataFReader {
+  STsdb *pTsdb;
+  // TODO
 };
 
-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;
-}
+struct SDataFWriter {
+  STsdb *pTsdb;
+};
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbSttFWriter.c b/source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c
similarity index 100%
rename from source/dnode/vnode/src/tsdb/dev/tsdbSttFWriter.c
rename to source/dnode/vnode/src/tsdb/dev/tsdbSttFReaderWriter.c