diff --git a/src/vnode/cache/inc/cache.h b/src/vnode/cache/inc/cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..45b0e0c8007771dd4d0c27dd5a0e9c25026dc94e
--- /dev/null
+++ b/src/vnode/cache/inc/cache.h
@@ -0,0 +1,14 @@
+#if !defined(_TD_CACHE_H_)
+#define _TD_CACHE_H_
+
+typedef void cache_pool_t;
+
+typedef struct SCacheBlock
+{
+
+    SCacheBlock *next;
+} SCacheBlock;
+
+
+
+#endif // _TD_CACHE_H_
diff --git a/src/vnode/common/catalog/inc/schema.h b/src/vnode/common/catalog/inc/schema.h
new file mode 100644
index 0000000000000000000000000000000000000000..89a048574c959cabc0b5caf35e5a0d50beee6a6e
--- /dev/null
+++ b/src/vnode/common/catalog/inc/schema.h
@@ -0,0 +1,18 @@
+#if !defined(_TD_SCHEMA_H_)
+#define _TD_SCHEMA_H_
+
+#include <stdint.h>
+
+#include "type.h"
+
+typedef struct _scolumn {
+  td_datatype_t type;
+  int32_t bytes;
+} SColumn;
+
+typedef struct SSchema {
+  int32_t numOfCols;
+  SColumn *columns;
+} SSchema;
+
+#endif  // _TD_SCHEMA_H_
diff --git a/src/vnode/common/catalog/inc/type.h b/src/vnode/common/catalog/inc/type.h
new file mode 100644
index 0000000000000000000000000000000000000000..ed8d84a22785e4e51f2262a426c08c1240edccb2
--- /dev/null
+++ b/src/vnode/common/catalog/inc/type.h
@@ -0,0 +1,30 @@
+#if !defined(_TD_TYPE_H_)
+#define _TD_TYPE_H_
+
+typedef enum {
+    TD_DATATYPE_INVLD = 0,
+    TD_DATATYPE_BOOL,
+    TD_DATATYPE_TINYINT,
+    TD_DATATYPE_SMALLINT,
+    TD_DATATYPE_INT,
+    TD_DATATYPE_BIGINT,
+    TD_DATATYPE_FLOAT,
+    TD_DATATYPE_DOUBLE,
+    TD_DATATYPE_VARCHAR,
+    TD_DATATYPE_NCHAR,
+    TD_DATATYPE_BINARY
+} td_datatype_t;
+
+// TODO: finish below
+#define TD_DATATYPE_BOOL_NULL
+#define TD_DATATYPE_TINYINT_NULL
+#define TD_DATATYPE_SMALLINT_NULL
+#define TD_DATATYPE_INT_NULL
+#define TD_DATATYPE_BIGINT_NULL
+#define TD_DATATYPE_FLOAT_NULL
+#define TD_DATATYPE_DOUBLE_NULL
+#define TD_DATATYPE_VARCHAR_NULL
+#define TD_DATATYPE_NCHAR_NULL
+#define TD_DATATYPE_BINARY_NULL
+
+#endif // _TD_TYPE_H_
diff --git a/src/vnode/common/data/inc/data.h b/src/vnode/common/data/inc/data.h
new file mode 100644
index 0000000000000000000000000000000000000000..de9502e709e1efe19825aa5d1f1ba8c079567522
--- /dev/null
+++ b/src/vnode/common/data/inc/data.h
@@ -0,0 +1,18 @@
+#if !defined(_TD_DATA_H_)
+#define _TD_DATA_H_
+
+#include <stdint.h>
+
+// ---- Row data interface
+typedef struct {
+    int32_t numOfRows;
+    char * data;
+} SRData;
+
+// ---- Column data interface
+typedef struct {
+    int32_t numOfPoints;
+    char *data;
+} SCData;
+
+#endif // _TD_DATA_H_
diff --git a/src/vnode/tsdb/inc/tsdb.h b/src/vnode/tsdb/inc/tsdb.h
index b52344145074b7410b33e57a48db2e6a42c98b5b..2117c951ca8b74d1d850d92fc2cd418146c32a76 100644
--- a/src/vnode/tsdb/inc/tsdb.h
+++ b/src/vnode/tsdb/inc/tsdb.h
@@ -1,3 +1,6 @@
+/**************************************
+ * FOR OUTSIDE USAGE
+ **************************************/
 #if !defined(_TD_TSDB_H_)
 #define _TD_TSDB_H_
 
diff --git a/src/vnode/tsdb/inc/tsdbMeta.h b/src/vnode/tsdb/inc/tsdbMeta.h
new file mode 100644
index 0000000000000000000000000000000000000000..9ab39171a6ebce27bed7a60d1d6f9f4a76797149
--- /dev/null
+++ b/src/vnode/tsdb/inc/tsdbMeta.h
@@ -0,0 +1,59 @@
+/************************************
+ * For internal usage
+ ************************************/
+
+#include "tsdb.h"
+
+typedef enum {
+  TSDB_TABLE_NORMAL,
+  TSDB_TABLE_STABLE,
+  TSDB_TABLE_SUPER
+} TSDB_TABLE_TYPE;
+
+// Below is the struct definition of super table
+// TODO: May merge all table definitions
+typedef struct _super_table {
+  int64_t uid;
+  char *tableName;
+
+  int64_t createdTime;
+
+  // TODO: try to merge the two schema into one
+  SSchema *pSchema;
+  SSchema *pTagSchema;
+
+  // A index created for all tables created using this super table
+  SSkipList * pIndex;
+} SSTable;
+
+// Normal table struct definition, table not
+// created from super table
+typedef struct SNTable
+{
+  tsdb_id_t tableId;
+  int64_t uid;
+  char *tableName;
+  
+  int64_t createdTime;
+  SSchema *pSchema
+} SNTable;
+
+// Table created from super table
+typedef struct STable {
+  tsdb_id_t tableId;
+  int64_t uid;
+  char *tableName;
+
+  int64_t createdTime;
+
+  // super table UID
+  int64_t stableUid;
+
+  // Tag values for this table
+  char *pTagVal;
+} STable;
+
+#define TSDB_GET_TABLE_ID(pTable) (((STable *)pTable)->tid).tableId
+#define TSDB_GET_TABLE_UID(pTable) (((STable *)pTable)->tid).uid
+
+#define TSDB_IS_SUPER_TABLE(pTable)
diff --git a/src/vnode/tsdb/src/tsdb.c b/src/vnode/tsdb/src/tsdb.c
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..50a46717f60b03d64a30470d27c78ee955ca373c 100644
--- a/src/vnode/tsdb/src/tsdb.c
+++ b/src/vnode/tsdb/src/tsdb.c
@@ -0,0 +1,47 @@
+#include <stdint.h>
+#include <pthread.h>
+
+#include "tsdb.h"
+#include "disk.h"
+#include "cache.h"
+
+typedef struct STSDBRepo
+{
+    // TSDB configuration
+    STSDBcfg *pCfg;
+
+    /* Disk tier handle for multi-tier storage
+     * 
+     * The handle is responsible for dealing with object-oriented
+     * storage.
+     */
+    SDiskTier *pDiskTier;
+
+    /* Cache block list
+     */
+    SCacheBlock *pCacheBloclList;
+
+    /* Map from tableId-->STable
+     */
+    STable *pTableList;
+
+    /* Map from tableName->tableId
+     * TODO: may use dict
+     */
+    void *pTableDict;
+
+    /* Map from super tableName->table
+     * TODO: may use dict
+     */
+    void *pSTableDict;
+
+    /* File Store
+     */
+    void *pFileStore;
+
+    pthread_mutext_t tsdbMutex;
+
+} STSDBRepo;
+
+#define TSDB_GET_TABLE_BY_ID(pRepo, sid) (((STSDBRepo *)pRepo)->pTableList)[sid]
+#define TSDB_GET_TABLE_BY_NAME(pRepo, name)
diff --git a/src/vnode/tsdb/src/tsdbMeta.c b/src/vnode/tsdb/src/tsdbMeta.c
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..c2a52c5026a35fea6c6404dbe4a384bcc7ec8736 100644
--- a/src/vnode/tsdb/src/tsdbMeta.c
+++ b/src/vnode/tsdb/src/tsdbMeta.c
@@ -0,0 +1,2 @@
+#include "tsdb.h"
+