diff --git a/src/common/inc/dataformat.h b/src/common/inc/dataformat.h
index 437c38a8a4e2af91d350ad2a91ead49fb52f3fcf..aff239712bf1e19ae9d4933d956790e7ed2bec2c 100644
--- a/src/common/inc/dataformat.h
+++ b/src/common/inc/dataformat.h
@@ -101,23 +101,13 @@ int      tdAppendColVal(SDataRow row, void *value, STColumn *pCol);
 void     tdDataRowReset(SDataRow row, STSchema *pSchema);
 SDataRow tdDataRowDup(SDataRow row);
 
-/* Data column definition
- * +---------+---------+-----------------------+
- * | int32_t | int32_t |                       |
- * +---------+---------+-----------------------+
- * |   len   | npoints |          data         |
- * +---------+---------+-----------------------+
- */
-typedef char *SDataCol;
-
-/* Data columns definition
- * +---------+---------+-----------------------+--------+-----------------------+
- * | int32_t | int32_t |                       |        |                       |
- * +---------+---------+-----------------------+--------+-----------------------+
- * |   len   | npoints |        SDataCol       |  ....  |        SDataCol       |
- * +---------+---------+-----------------------+--------+-----------------------+
- */
-typedef char *SDataCols;
+// ----------------- Data column structure
+typedef struct SDataCol {
+  int64_t len;
+  char    data[];
+} SDataCol;
+
+void tdConvertDataRowToCol(SDataCol *cols, STSchema *pSchema, int *iter);
 
 #ifdef __cplusplus
 }
diff --git a/src/common/src/dataformat.c b/src/common/src/dataformat.c
index 419e37639257b2172ffe4eaa0c68436bb8ff6f6c..9c356b0cbc71671ee8a7d917bf18c0b988f0cb1f 100644
--- a/src/common/src/dataformat.c
+++ b/src/common/src/dataformat.c
@@ -294,6 +294,16 @@ SDataRow tdDataRowDup(SDataRow row) {
   return trow;
 }
 
+void tdConvertDataRowToCol(SDataCol *cols, STSchema *pSchema, int *iter) {
+  int row = *iter;
+
+  for (int i = 0; i < schemaNCols(pSchema); i++) {
+    // TODO
+  }
+
+  *iter = row + 1;
+}
+
 /**
  * Return the first part length of a data row for a schema
  */
diff --git a/src/vnode/tsdb/inc/tsdbFile.h b/src/vnode/tsdb/inc/tsdbFile.h
index ab10fd8e4977706de403f967c92dd9f54eff9950..7e83b843754fbc47088f536384817e653b751da4 100644
--- a/src/vnode/tsdb/inc/tsdbFile.h
+++ b/src/vnode/tsdb/inc/tsdbFile.h
@@ -26,8 +26,7 @@ extern "C" {
 typedef enum {
   TSDB_FILE_TYPE_HEAD,  // .head file type
   TSDB_FILE_TYPE_DATA,  // .data file type
-  TSDB_FILE_TYPE_LAST,  // .last file type
-  TSDB_FILE_TYPE_META   // .meta file type
+  TSDB_FILE_TYPE_LAST   // .last file type
 } TSDB_FILE_TYPE;
 
 extern const char *tsdbFileSuffix[];
@@ -38,7 +37,6 @@ typedef struct {
 } SFileInfo;
 
 typedef struct {
-  int     fd;
   int64_t size;     // total size of the file
   int64_t tombSize; // unused file size
 } SFile;
@@ -59,7 +57,7 @@ typedef struct {
   SFileGroup fGroup[];
 } STsdbFileH;
 
-#define IS_VALID_TSDB_FILE_TYPE(type) ((type) >= TSDB_FILE_TYPE_HEAD && (type) <= TSDB_FILE_TYPE_META)
+#define IS_VALID_TSDB_FILE_TYPE(type) ((type) >= TSDB_FILE_TYPE_HEAD && (type) <= TSDB_FILE_TYPE_LAST)
 
 STsdbFileH *tsdbInitFile(char *dataDir, int32_t daysPerFile, int32_t keep, int32_t minRowsPerFBlock,
                          int32_t maxRowsPerFBlock);
diff --git a/src/vnode/tsdb/src/tsdbFile.c b/src/vnode/tsdb/src/tsdbFile.c
index 301f2978030b9fb69bca4cd5eb1f5356686fa6eb..ad9045567b69b01aa9faf47f61fb7f693239d4fd 100644
--- a/src/vnode/tsdb/src/tsdbFile.c
+++ b/src/vnode/tsdb/src/tsdbFile.c
@@ -12,77 +12,144 @@
  * 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/>.
  */
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdint.h>
 #include <string.h>
-#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
 
-#include "tsdbFile.h"
 #include "tglobalcfg.h"
+#include "tsdbFile.h"
 
-// int64_t tsMsPerDay[] = {
-//     86400000L,       // TSDB_PRECISION_MILLI
-//     86400000000L,    // TSDB_PRECISION_MICRO
-//     86400000000000L  // TSDB_PRECISION_NANO
-// };
+#define TSDB_FILE_HEAD_SIZE 512
+#define TSDB_FILE_DELIMITER 0xF00AFA0F
 
 #define tsdbGetKeyFileId(key, daysPerFile, precision) ((key) / tsMsPerDay[(precision)] / (daysPerFile))
 #define tsdbGetMaxNumOfFiles(keep, daysPerFile) ((keep) / (daysPerFile) + 3)
 
 typedef struct {
+  int32_t len;
+  int32_t padding;  // For padding purpose
   int64_t offset;
-} SCompHeader;
-
-typedef struct {
-  int64_t uid;
-  int64_t last : 1;
-  int64_t numOfBlocks : 63;
-  int32_t delimiter;
-} SCompInfo;
-
-typedef struct {
-  TSKEY   keyFirst;
-  TSKEY   keyLast;
-  int32_t numOfBlocks;
-  int32_t offset;
 } SCompIdx;
 
+/**
+ * if numOfSubBlocks == -1, then the SCompBlock is a sub-block
+ * if numOfSubBlocks == 1, then the SCompBlock refers to the data block, and offset/len refer to
+ *                         the data block offset and length
+ * if numOfSubBlocks > 1, then the offset/len refer to the offset of the first sub-block in the
+ * binary
+ */
 typedef struct {
+  int64_t last : 1;          // If the block in data file or last file
+  int64_t offset : 63;       // Offset of data block or sub-block index depending on numOfSubBlocks
+  int32_t algorithm : 8;     // Compression algorithm
+  int32_t numOfPoints : 24;  // Number of total points
+  int32_t sversion;          // Schema version
+  int32_t len;               // Data block length or nothing
+  int16_t numOfSubBlocks;    // Number of sub-blocks;
+  int16_t numOfCols;
   TSKEY   keyFirst;
   TSKEY   keyLast;
-  int64_t offset;
-  int32_t len;
-  int32_t sversion;
 } SCompBlock;
 
 typedef struct {
-  int64_t uid;
-} SBlock;
+  int32_t    delimiter;  // For recovery usage
+  int32_t    checksum;   // TODO: decide if checksum logic in this file or make it one API
+  int64_t    uid;
+  int32_t    padding;      // For padding purpose
+  int32_t    numOfBlocks;  // TODO: make the struct padding
+  SCompBlock blocks[];
+} SCompInfo;
 
+// TODO: take pre-calculation into account
 typedef struct {
-  int16_t colId;
-  int16_t bytes;
-  int32_t nNullPoints;
-  int32_t type:8;
-  int32_t offset:24;
-  int32_t len;
-  // fields for pre-aggregate
-  // TODO: pre-aggregation should be seperated
-  int64_t sum;
-  int64_t max;
-  int64_t min;
-  int16_t maxIdx;
-  int16_t minIdx;
-} SField;
+  int16_t colId;  // Column ID
+  int16_t len;    // Column length
+  int32_t type : 8;
+  int32_t offset : 24;
+} SCompCol;
+
+// TODO: Take recover into account
+typedef struct {
+  int32_t  delimiter;  // For recovery usage
+  int32_t  numOfCols;  // For recovery usage
+  int64_t  uid;        // For recovery usage
+  SCompCol cols[];
+} SCompData;
 
 const char *tsdbFileSuffix[] = {
     ".head",  // TSDB_FILE_TYPE_HEAD
     ".data",  // TSDB_FILE_TYPE_DATA
-    ".last",  // TSDB_FILE_TYPE_LAST
-    ".meta"   // TSDB_FILE_TYPE_META
+    ".last"   // TSDB_FILE_TYPE_LAST
 };
 
+static int tsdbWriteFileHead(int fd) {
+  char head[TSDB_FILE_HEAD_SIZE] = "\0";
+
+  lseek(fd, 0, SEEK_SET);
+  if (write(fd, head, TSDB_FILE_HEAD_SIZE) < 0) return -1;
+
+  return 0;
+}
+
+static int tsdbWriteHeadFileIdx(int fd, int maxTables) {
+  int   size = sizeof(SCompIdx) * maxTables;
+  void *buf = calloc(1, size);
+  if (buf == NULL) return -1;
+
+  if (lseek(fd, TSDB_FILE_HEAD_SIZE, SEEK_SET) < 0) {
+    free(buf);
+    return NULL;
+  }
+
+  if (write(fd, buf, size) < 0) {
+    free(buf);
+    return -1;
+  }
+
+  return 0;
+}
+
+static int tsdbCreateFile(char *dataDir, int fileId, int8_t type, int maxTables) {
+  char fname[128] = "\0";
+  sprintf(fname, "%s/f%d%s", dataDir, fileId, tsdbFileSuffix[type]);
+  if (access(fname, F_OK) == 0) {
+    // File already exists
+    return -1;
+  }
+
+  int fd = open(fname, O_RDWR | O_CREAT, 0755);
+  if (fd < 0) return -1;
+
+  if (tsdbWriteFileHead(fd) < 0) {
+    close(fd);
+    return -1;
+  }
+
+  if (type == TSDB_FILE_TYPE_LAST) {
+    if (tsdbWriteHeadFileIdx(fd, maxTables) < 0) {
+      close(fd);
+      return -1;
+    }
+  }
+
+  close(fd);
+
+  return 0;
+}
+
+// Create a file group with fileId and return a SFileGroup object
+static int tsdbCreateFileGroup(char *dataDir, int fileId, SFileGroup *pFGroup) {
+  // tsdbCreateFile()
+
+  return 0;
+}
+
 /**
  * Initialize the TSDB file handle
  */
@@ -105,7 +172,7 @@ STsdbFileH *tsdbInitFile(char *dataDir, int32_t daysPerFile, int32_t keep, int32
   }
 
   struct dirent *dp;
-  char fname[256];
+  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 */) {
diff --git a/src/vnode/tsdb/src/tsdbMain.c b/src/vnode/tsdb/src/tsdbMain.c
index 073321816db29939f5ba28400ad5ad5f598bfa29..5104c664dcade8637e76b5aa3d65703dcbc3b672 100644
--- a/src/vnode/tsdb/src/tsdbMain.c
+++ b/src/vnode/tsdb/src/tsdbMain.c
@@ -612,9 +612,6 @@ static int32_t tsdbDestroyRepoEnv(STsdbRepo *pRepo) {
 
   rmdir(dirName);
 
-  char *metaFname = tsdbGetFileName(pRepo->rootDir, "tsdb", TSDB_FILE_TYPE_META);
-  remove(metaFname);
-
   return 0;
 }