diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
index a9fe9d8574..e8bac47ae8 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
@@ -59,7 +59,7 @@ static int32_t open_committer_writer(SCommitter *pCommitter) {
   } else {
     conf.file.type = TSDB_FTYPE_STT;
 
-    if (tfsAllocDisk(pTsdb->pVnode->pTfs, pCommitter->expLevel, &conf.file.diskId) < 0) {
+    if (tfsAllocDisk(pTsdb->pVnode->pTfs, pCommitter->expLevel, &conf.file.did) < 0) {
       code = TSDB_CODE_FS_NO_VALID_DISK;
       TSDB_CHECK_CODE(code, lino, _exit);
     }
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFSet.h b/source/dnode/vnode/src/tsdb/dev/tsdbFSet.h
index 4e37d6df78..effe8c0494 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFSet.h
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFSet.h
@@ -49,8 +49,8 @@ struct SSttLvl {
 struct SFileSet {
   int32_t        fid;
   int64_t        nextid;
-  struct STFile *farr[TSDB_FTYPE_MAX];
-  SSttLvl        lvl0;  // level 0 of .stt
+  struct STFile *farr[TSDB_FTYPE_MAX];  // file array
+  SSttLvl        lvl0;                  // level 0 of .stt
 };
 
 int32_t tsdbFileSetCreate(int32_t fid, struct SFileSet **ppSet);
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFile.c b/source/dnode/vnode/src/tsdb/dev/tsdbFile.c
index 13a677e21d..05c4d5d57e 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFile.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFile.c
@@ -51,16 +51,16 @@ int32_t tsdbTFileInit(STsdb *pTsdb, struct STFile *pFile) {
   STfs   *pTfs = pVnode->pTfs;
 
   if (pTfs) {
-    snprintf(pFile->fname,                         //
-             TSDB_FILENAME_LEN,                    //
-             "%s%s%s%sv%df%dver%" PRId64 "%s",     //
-             tfsGetDiskPath(pTfs, pFile->diskId),  //
-             TD_DIRSEP,                            //
-             pTsdb->path,                          //
-             TD_DIRSEP,                            //
-             TD_VID(pVnode),                       //
-             pFile->fid,                           //
-             pFile->cid,                           //
+    snprintf(pFile->fname,                      //
+             TSDB_FILENAME_LEN,                 //
+             "%s%s%s%sv%df%dver%" PRId64 "%s",  //
+             tfsGetDiskPath(pTfs, pFile->did),  //
+             TD_DIRSEP,                         //
+             pTsdb->path,                       //
+             TD_DIRSEP,                         //
+             TD_VID(pVnode),                    //
+             pFile->fid,                        //
+             pFile->cid,                        //
              tsdb_ftype_suffix[pFile->type]);
   } else {
     snprintf(pFile->fname,                  //
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFile.h b/source/dnode/vnode/src/tsdb/dev/tsdbFile.h
index fe7579f01f..c70a523636 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFile.h
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFile.h
@@ -22,6 +22,8 @@
 extern "C" {
 #endif
 
+typedef struct STFile STFile;
+
 typedef enum {
   TSDB_FTYPE_HEAD = 0,  // .head
   TSDB_FTYPE_DATA,      // .data
@@ -31,21 +33,42 @@ typedef enum {
   TSDB_FTYPE_STT,       // .stt
 } tsdb_ftype_t;
 
-struct STFile {
-  char         fname[TSDB_FILENAME_LEN];
-  int32_t      ref;
-  tsdb_ftype_t type;
-  SDiskID      diskId;
-  int64_t      size;
-  int64_t      cid;
-  int32_t      fid;
-};
-
 int32_t tsdbTFileCreate(const struct STFile *config, struct STFile **ppFile);
 int32_t tsdbTFileDestroy(struct STFile *pFile);
 int32_t tsdbTFileInit(STsdb *pTsdb, struct STFile *pFile);
 int32_t tsdbTFileClear(struct STFile *pFile);
 
+struct STFile {
+  char         fname[TSDB_FILENAME_LEN];
+  int32_t      ref;
+  int32_t      state;
+  tsdb_ftype_t type;
+  SDiskID      did;
+  int64_t      size;
+  int64_t      cid;
+  int32_t      fid;
+  union {
+    struct {
+      int32_t level;  // level of .stt
+      int32_t nSeg;   // number of segments in .stt
+    } stt;
+    struct {
+      // TODO
+    } head;
+    struct {
+      // TODO
+    } data;
+    struct {
+      // TODO
+    } sma;
+    struct {
+      // TODO
+    } tomb;
+  };
+
+  LISTD(struct STFile) listNode;
+};
+
 #ifdef __cplusplus
 }
 #endif