diff --git a/source/libs/tdb/src/db/tdb_mpool.c b/source/libs/tdb/src/db/tdb_mpool.c
index ac4018d348..6d4f7c4bdc 100644
--- a/source/libs/tdb/src/db/tdb_mpool.c
+++ b/source/libs/tdb/src/db/tdb_mpool.c
@@ -13,4 +13,59 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "tdb_mpool.h"
\ No newline at end of file
+#include "tdb_mp.h"
+
+int tdbOpenMP(TDB_MPOOL **mpp, uint64_t cachesize, pgsize_t pgsize) {
+  TDB_MPOOL *mp;
+  size_t     tsize;
+  MP_PAGE *  pagep;
+
+  // check parameters
+  if (!TDB_IS_PGSIZE_VLD(pgsize)) {
+    tdbError("invalid page size");
+    return -1;
+  }
+
+  // allocate handle
+  mp = (TDB_MPOOL *)calloc(1, sizeof(*mp));
+  if (mp == NULL) {
+    tdbError("failed to malloc memory pool handle");
+    return -1;
+  }
+
+  // initialize the handle
+  mp->cachesize = cachesize;
+  mp->pgsize = pgsize;
+  mp->npages = cachesize / pgsize;
+  mp->pages = (MP_PAGE *)calloc(mp->npages, MP_PAGE_SIZE(pgsize));
+  if (mp->pages == NULL) {
+    tdbError("failed to malloc memory pool pages");
+    free(mp);
+    return -1;
+  }
+
+  TD_DLIST_INIT(&(mp->freeList));
+
+  mp->nbucket = mp->npages;
+  mp->hashtab = (MP_PAGE_LIST *)calloc(mp->nbucket, sizeof(MP_PAGE_LIST));
+  if (mp->hashtab == NULL) {
+    tdbError("failed to malloc memory pool hash table");
+    free(mp->pages);
+    free(mp);
+    return -1;
+  }
+
+  for (int i = 0; i < mp->npages; i++) {
+    pagep = (MP_PAGE *)MP_PAGE_AT(mp, i);
+    TD_DLIST_APPEND(&mp->freeList, pagep);
+  }
+
+  // return
+  *mpp = mp;
+  return 0;
+}
+
+int tdbCloseMP(TDB_MPOOL *mp) {
+  // TODO
+  return 0;
+}
diff --git a/source/libs/tdb/src/inc/tdb_inc.h b/source/libs/tdb/src/inc/tdb_inc.h
index cce6bc3bda..2eed9a8dc7 100644
--- a/source/libs/tdb/src/inc/tdb_inc.h
+++ b/source/libs/tdb/src/inc/tdb_inc.h
@@ -35,7 +35,13 @@ typedef int32_t pgsize_t;
 #define TDB_MIN_PGSIZE 512
 #define TDB_MAX_PGSIZE 16384
 #define TDB_DEFAULT_PGSIZE 4096
-#define TDB_IS_PGSIZE_VLD(s) (((s) >= TKV_MIN_PGSIZE) && (TKV_MAX_PGSIZE <= TKV_MAX_PGSIZE))
+#define TDB_IS_PGSIZE_VLD(s) (((s) >= TDB_MIN_PGSIZE) && ((s) <= TDB_MAX_PGSIZE))
+
+// fileid
+#define TDB_FILE_UID_LEN 20
+
+// tdb_log
+#define tdbError(var)
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/tdb/src/inc/tdb_mpool.h b/source/libs/tdb/src/inc/tdb_mp.h
similarity index 68%
rename from source/libs/tdb/src/inc/tdb_mpool.h
rename to source/libs/tdb/src/inc/tdb_mp.h
index 8d113e5edc..d4e7457b05 100644
--- a/source/libs/tdb/src/inc/tdb_mpool.h
+++ b/source/libs/tdb/src/inc/tdb_mp.h
@@ -25,39 +25,44 @@ extern "C" {
 // Exposed handle
 typedef struct TDB_MPOOL TDB_MPOOL;
 
-#define TDB_FILE_UID_LEN 20
 typedef struct {
   uint8_t fuid[TDB_FILE_UID_LEN];
   pgid_t  pgid;
 } mp_pgid_t;
 
-// Exposed apis
-int tdbOpenMP(TDB_MPOOL **mpp, uint64_t cachesize, pgsize_t pgsize);
-int tdbCloseMP(TDB_MPOOL *mp);
-int tdbMPFetchPage(TDB_MPOOL *mp, mp_pgid_t mpgid, void *p);
-int tdbMpUnfetchPage(TDB_MPOOL *mp, mp_pgid_t mpgid, void *p);
-
-// Hidden impls
-
 typedef struct MP_PAGE {
   // SRWLatch  rwLatch;
   mp_pgid_t mpgid;
   uint8_t   dirty;
   int32_t   pinRef;
-  // TD_DLIST_NODE(MP_PAGE); // The free list handle
+  TD_DLIST_NODE(MP_PAGE);
   char *page[];
 } MP_PAGE;
 
+#define MP_PAGE_SIZE(pgsize) (sizeof(MP_PAGE) + (pgsize))
+
+typedef TD_DLIST(MP_PAGE) MP_PAGE_LIST;
 struct TDB_MPOOL {
-  pthread_mutex_t mutex;
-  int64_t         cachesize;
-  pgsize_t        pgsize;
-  MP_PAGE *       pages;
-  // TD_DBLIST(MP_PAGE) freeList;
-  // TD_DLIST(TD_MPFILE) mpfList; // MPFILE registered on this memory pool
-  // Hash<mp_pgid_t, frameid> hash;
+  int64_t      cachesize;
+  pgsize_t     pgsize;
+  int32_t      npages;
+  MP_PAGE *    pages;
+  MP_PAGE_LIST freeList;
+  // Hash<mp_pgid_t, frame_id_t>
+  int32_t       nbucket;
+  MP_PAGE_LIST *hashtab;
+  // TODO: TD_DLIST(TD_MPFILE) mpfList; // MPFILE registered on this memory pool
 };
 
+#define MP_PAGE_AT(mp, idx) ((char *)((mp)->pages) + MP_PAGE_SIZE((mp)->pgsize) * (idx))
+
+// Exposed apis =====================================================================================================
+
+int tdbOpenMP(TDB_MPOOL **mpp, uint64_t cachesize, pgsize_t pgsize);
+int tdbCloseMP(TDB_MPOOL *mp);
+int tdbMPFetchPage(TDB_MPOOL *mp, mp_pgid_t mpgid, void *p);
+int tdbMpUnfetchPage(TDB_MPOOL *mp, mp_pgid_t mpgid, void *p);
+
 #ifdef __cplusplus
 }
 #endif