diff --git a/source/libs/tdb/inc/tdb.h b/source/libs/tdb/inc/tdb.h
index 467e40325e73505e91abf45046e03adff52561ec..71ac3d97ed87eea6b81b7a16ecddb206a66b0cb0 100644
--- a/source/libs/tdb/inc/tdb.h
+++ b/source/libs/tdb/inc/tdb.h
@@ -22,43 +22,6 @@
 extern "C" {
 #endif
 
-// typedef struct STDb       TDB;
-// typedef struct STDbEnv    TENV;
-// typedef struct STDbCurosr TDBC;
-
-// typedef int32_t pgsz_t;
-// typedef int32_t cachesz_t;
-
-// typedef int (*TdbKeyCmprFn)(int keyLen1, const void *pKey1, int keyLen2, const void *pKey2);
-
-// // TEVN
-// int tdbEnvCreate(TENV **ppEnv, const char *rootDir);
-// int tdbEnvOpen(TENV *ppEnv);
-// int tdbEnvClose(TENV *pEnv);
-
-// int       tdbEnvSetCache(TENV *pEnv, pgsz_t pgSize, cachesz_t cacheSize);
-// pgsz_t    tdbEnvGetPageSize(TENV *pEnv);
-// cachesz_t tdbEnvGetCacheSize(TENV *pEnv);
-
-// int tdbEnvBeginTxn(TENV *pEnv);
-// int tdbEnvCommit(TENV *pEnv);
-
-// // TDB
-// int tdbCreate(TDB **ppDb);
-// int tdbOpen(TDB *pDb, const char *fname, const char *dbname, TENV *pEnv);
-// int tdbClose(TDB *pDb);
-// int tdbDrop(TDB *pDb);
-
-// int tdbSetKeyLen(TDB *pDb, int klen);
-// int tdbSetValLen(TDB *pDb, int vlen);
-// int tdbSetDup(TDB *pDb, int dup);
-// int tdbSetCmprFunc(TDB *pDb, TdbKeyCmprFn fn);
-// int tdbGetKeyLen(TDB *pDb);
-// int tdbGetValLen(TDB *pDb);
-// int tdbGetDup(TDB *pDb);
-
-// int tdbInsert(TDB *pDb, const void *pKey, int nKey, const void *pData, int nData);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/tdb/src/db/tdbPager.c b/source/libs/tdb/src/db/tdbPager.c
index b811fcb135d77a8d4378996e99f845a7f318b12b..0abc64d0b084927efb5a7b80256cfb263c74f2b2 100644
--- a/source/libs/tdb/src/db/tdbPager.c
+++ b/source/libs/tdb/src/db/tdbPager.c
@@ -377,12 +377,12 @@ static int tdbPagerWritePageToJournal(SPager *pPager, SPage *pPage) {
 
   pgno = TDB_PAGE_PGNO(pPage);
 
-  ret = tdbWrite(pPager->jfd, &pgno, sizeof(pgno));
+  ret = tdbOsWrite(pPager->jfd, &pgno, sizeof(pgno));
   if (ret < 0) {
     return -1;
   }
 
-  ret = tdbWrite(pPager->jfd, pPage->pData, pPage->pageSize);
+  ret = tdbOsWrite(pPager->jfd, pPage->pData, pPage->pageSize);
   if (ret < 0) {
     return -1;
   }
@@ -395,12 +395,12 @@ static int tdbPagerWritePageToDB(SPager *pPager, SPage *pPage) {
   int ret;
 
   offset = pPage->pageSize * TDB_PAGE_PGNO(pPage);
-  if (lseek(pPager->fd, offset, SEEK_SET) < 0) {
+  if (tdbOsLSeek(pPager->fd, offset, SEEK_SET) < 0) {
     ASSERT(0);
     return -1;
   }
 
-  ret = tdbWrite(pPager->fd, pPage->pData, pPage->pageSize);
+  ret = tdbOsWrite(pPager->fd, pPage->pData, pPage->pageSize);
   if (ret < 0) {
     ASSERT(0);
     return -1;
diff --git a/source/libs/tdb/src/inc/tdbInt.h b/source/libs/tdb/src/inc/tdbInt.h
index c926d9358c31332b5f92a48c269552547bde2dfc..84c92f896c312f363adf38cda580436b6403d3ac 100644
--- a/source/libs/tdb/src/inc/tdbInt.h
+++ b/source/libs/tdb/src/inc/tdbInt.h
@@ -16,10 +16,11 @@
 #ifndef _TD_TDB_INTERNAL_H_
 #define _TD_TDB_INTERNAL_H_
 
+#include "os.h"
 #include "tlist.h"
 #include "tlockfree.h"
 
-// #include "tdb.h"
+#include "tdb.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/libs/tdb/src/inc/tdbOs.h b/source/libs/tdb/src/inc/tdbOs.h
index c737ed867d1dc28f7865693897f474cbb7e1e27b..fd511369574cf2afaa86c3b80884b368ee273f49 100644
--- a/source/libs/tdb/src/inc/tdbOs.h
+++ b/source/libs/tdb/src/inc/tdbOs.h
@@ -23,7 +23,7 @@ extern "C" {
 // TODO: use cmake to control the option
 #define TDB_FOR_TDENGINE
 
-// For memory
+// For memory -----------------
 #ifdef TDB_FOR_TDENGINE
 
 #define tdbOsMalloc  taosMemoryMalloc
@@ -40,18 +40,19 @@ extern "C" {
 
 #endif
 
-// For file and directory
+// For file and directory -----------------
 #ifdef TDB_FOR_TDENGINE
 
 /* file */
 typedef TdFilePtr tdb_fd_t;
 
-#define tdbOsOpen  taosOpenFile
-#define tdbOsClose taosCloseFile
-#define tdbOsRead  taosReadFile
-#define tdbOsPRead taosPReadFile
-#define tdbOsWrite taosWriteFile
-#define tdbOsFSync taosFsyncFile
+#define tdbOsOpen      taosOpenFile
+#define tdbOsClose(FD) taosCloseFile(&(FD))
+#define tdbOsRead      taosReadFile
+#define tdbOsPRead     taosPReadFile
+#define tdbOsWrite     taosWriteFile
+#define tdbOsFSync     taosFsyncFile
+#define tdbOsLSeek     taosLSeekFile
 
 /* directory */
 #define tdbOsMkdir taosMkDir
@@ -68,6 +69,7 @@ typedef int tdb_fd_t;
 #define tdbOsPRead pread  // TODO
 #define tdbOsWrite write  // TODO
 #define tdbOsFSync fsync
+#define tdbOsLSeek lseek
 
 /* directory */
 #define tdbOsMkdir mkdir
@@ -75,7 +77,7 @@ typedef int tdb_fd_t;
 
 #endif
 
-// For threads and lock
+// For threads and lock -----------------
 #ifdef TDB_FOR_TDENGINE
 
 /* spin lock */