diff --git a/src/vnode/tsdb/inc/tsdbFile.h b/src/vnode/tsdb/inc/tsdbFile.h
index 7b3e19d0b981d8f1c4d78297b087c55e61984309..ab10fd8e4977706de403f967c92dd9f54eff9950 100644
--- a/src/vnode/tsdb/inc/tsdbFile.h
+++ b/src/vnode/tsdb/inc/tsdbFile.h
@@ -23,8 +23,6 @@
 extern "C" {
 #endif
 
-typedef int32_t file_id_t;
-
 typedef enum {
   TSDB_FILE_TYPE_HEAD,  // .head file type
   TSDB_FILE_TYPE_DATA,  // .data file type
@@ -40,19 +38,33 @@ typedef struct {
 } SFileInfo;
 
 typedef struct {
-  char *    fname;
-  SFileInfo fInfo;
-} SFILE;
+  int     fd;
+  int64_t size;     // total size of the file
+  int64_t tombSize; // unused file size
+} SFile;
 
-// typedef struct {
-//   int64_t offset;
-//   int64_t skey;
-//   int64_t ekey;
-//   int16_t numOfBlocks;
-// } SDataBlock;
+typedef struct {
+  int32_t fileId;
+  SFile   fhead;
+  SFile   fdata;
+  SFile   flast;
+} SFileGroup;
+
+// TSDB file handle
+typedef struct {
+  int32_t    daysPerFile;
+  int32_t    keep;
+  int32_t    minRowPerFBlock;
+  int32_t    maxRowsPerFBlock;
+  SFileGroup fGroup[];
+} STsdbFileH;
 
 #define IS_VALID_TSDB_FILE_TYPE(type) ((type) >= TSDB_FILE_TYPE_HEAD && (type) <= TSDB_FILE_TYPE_META)
 
+STsdbFileH *tsdbInitFile(char *dataDir, int32_t daysPerFile, int32_t keep, int32_t minRowsPerFBlock,
+                         int32_t maxRowsPerFBlock);
+void        tsdbCloseFile(STsdbFileH *pFileH);
+
 char *tsdbGetFileName(char *dirName, char *fname, TSDB_FILE_TYPE type);
 
 #ifdef __cplusplus
diff --git a/src/vnode/tsdb/src/tsdbFile.c b/src/vnode/tsdb/src/tsdbFile.c
index b977a51b51481294871413390641c90559b9cdff..301f2978030b9fb69bca4cd5eb1f5356686fa6eb 100644
--- a/src/vnode/tsdb/src/tsdbFile.c
+++ b/src/vnode/tsdb/src/tsdbFile.c
@@ -14,9 +14,21 @@
  */
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <string.h>
+#include <dirent.h>
 
 #include "tsdbFile.h"
+#include "tglobalcfg.h"
+
+// int64_t tsMsPerDay[] = {
+//     86400000L,       // TSDB_PRECISION_MILLI
+//     86400000000L,    // TSDB_PRECISION_MICRO
+//     86400000000000L  // TSDB_PRECISION_NANO
+// };
+
+#define tsdbGetKeyFileId(key, daysPerFile, precision) ((key) / tsMsPerDay[(precision)] / (daysPerFile))
+#define tsdbGetMaxNumOfFiles(keep, daysPerFile) ((keep) / (daysPerFile) + 3)
 
 typedef struct {
   int64_t offset;
@@ -71,6 +83,55 @@ const char *tsdbFileSuffix[] = {
     ".meta"   // TSDB_FILE_TYPE_META
 };
 
+/**
+ * Initialize the TSDB file handle
+ */
+STsdbFileH *tsdbInitFile(char *dataDir, int32_t daysPerFile, int32_t keep, int32_t minRowsPerFBlock,
+                         int32_t maxRowsPerFBlock) {
+  STsdbFileH *pTsdbFileH =
+      (STsdbFileH *)calloc(1, sizeof(STsdbFileH) + sizeof(SFileGroup) * tsdbGetMaxNumOfFiles(keep, daysPerFile));
+  if (pTsdbFileH == NULL) return NULL;
+
+  pTsdbFileH->daysPerFile = daysPerFile;
+  pTsdbFileH->keep = keep;
+  pTsdbFileH->minRowPerFBlock = minRowsPerFBlock;
+  pTsdbFileH->maxRowsPerFBlock = maxRowsPerFBlock;
+
+  // Open the directory to read information of each file
+  DIR *dir = opendir(dataDir);
+  if (dir == NULL) {
+    free(pTsdbFileH);
+    return NULL;
+  }
+
+  struct dirent *dp;
+  char fname[256];
+  while ((dp = readdir(dir)) != NULL) {
+    if (strncmp(dp->d_name, ".", 1) == 0 || strncmp(dp->d_name, "..", 2) == 0) continue;
+    if (true /* check if the file is the .head file */) {
+      int fileId = 0;
+      int vgId = 0;
+      sscanf(dp->d_name, "v%df%d.head", &vgId, &fileId);
+      // TODO
+
+      // Open head file
+
+      // Open data file
+
+      // Open last file
+    }
+  }
+
+  return pTsdbFileH;
+}
+
+/**
+ * Closet the file handle
+ */
+void tsdbCloseFile(STsdbFileH *pFileH) {
+  // TODO
+}
+
 char *tsdbGetFileName(char *dirName, char *fname, TSDB_FILE_TYPE type) {
   if (!IS_VALID_TSDB_FILE_TYPE(type)) return NULL;
 
@@ -79,4 +140,10 @@ char *tsdbGetFileName(char *dirName, char *fname, TSDB_FILE_TYPE type) {
 
   sprintf(fileName, "%s/%s%s", dirName, fname, tsdbFileSuffix[type]);
   return fileName;
+}
+
+static void tsdbGetKeyRangeOfFileId(int32_t daysPerFile, int8_t precision, int32_t fileId, TSKEY *minKey,
+                                    TSKEY *maxKey) {
+  *minKey = fileId * daysPerFile * tsMsPerDay[precision];
+  *maxKey = *minKey + daysPerFile * tsMsPerDay[precision] - 1;
 }
\ No newline at end of file
diff --git a/src/vnode/tsdb/src/tsdbMetaFile.c b/src/vnode/tsdb/src/tsdbMetaFile.c
index ee173d7d7169b19d007eb5cc8eeb37644ec13ed7..70ae0611068dfd9e743524153c9a878b6bcad432 100644
--- a/src/vnode/tsdb/src/tsdbMetaFile.c
+++ b/src/vnode/tsdb/src/tsdbMetaFile.c
@@ -83,7 +83,7 @@ int32_t tsdbInsertMetaRecord(SMetaFile *mfh, int64_t uid, void *cont, int32_t co
   }
 
   // TODO: make below a function to implement
-  if (fseek(mfh->fd, info.offset, SEEK_CUR) < 0) {
+  if (lseek(mfh->fd, info.offset, SEEK_CUR) < 0) {
     return -1;
   }
 
@@ -114,7 +114,7 @@ int32_t tsdbDeleteMetaRecord(SMetaFile *mfh, int64_t uid) {
   // Remove record from file
 
   info.offset = -info.offset;
-  if (fseek(mfh->fd, -info.offset, SEEK_CUR) < 0) {
+  if (lseek(mfh->fd, -info.offset, SEEK_CUR) < 0) {
     return -1;
   }
 
@@ -149,7 +149,7 @@ int32_t tsdbUpdateMetaRecord(SMetaFile *mfh, int64_t uid, void *cont, int32_t co
 
     mfh->size += contLen;
   }
-  if (fseek(mfh->fd, -info.offset, SEEK_CUR) < 0) {
+  if (lseek(mfh->fd, -info.offset, SEEK_CUR) < 0) {
     return -1;
   }
 
@@ -212,7 +212,7 @@ static int tsdbRestoreFromMetaFile(char *fname, SMetaFile *mfh) {
     return -1;
   }
 
-  if (fseek(fd, TSDB_META_FILE_HEADER_SIZE, SEEK_SET) < 0) {
+  if (lseek(fd, TSDB_META_FILE_HEADER_SIZE, SEEK_SET) < 0) {
     // TODO: deal with the error
     close(fd);
     return -1;