diff --git a/weed/filer/ydb/ydb_queries.go b/weed/filer/ydb/ydb_queries.go
index fdfc8bcb1..6e0939948 100644
--- a/weed/filer/ydb/ydb_queries.go
+++ b/weed/filer/ydb/ydb_queries.go
@@ -1,23 +1,15 @@
 package ydb
 
-const (
-	createQuery = `
-		PRAGMA TablePathPrefix("%s");
-		CREATE TABLE file_meta (
-			dir_hash int64,
-			name Utf8,
-			directory Utf8,
-			meta String,
-			PRIMARY KEY (dir_hash, name)
-		);`
+import asql "github.com/chrislusf/seaweedfs/weed/filer/abstract_sql"
 
+const (
 	insertQuery = `
 		DECLARE $dir_hash int64;
 		DECLARE $name AS Utf8;
 		DECLARE $directory AS Utf8;
 		DECLARE $meta AS String;
 
-		UPSERT INTO file_meta
+		UPSERT INTO ` + asql.DEFAULT_TABLE + `
 			(dir_hash, name, directory, meta)
 		VALUES
 			($dir_hash, $name, $directory, $meta);`
@@ -28,7 +20,7 @@ const (
 		DECLARE $directory AS Utf8;
 		DECLARE $meta AS String;
 
-		REPLACE INTO file_meta
+		REPLACE INTO ` + asql.DEFAULT_TABLE + `
 			(dir_hash, name, directory, meta)
 		VALUES
 			($dir_hash, $name, $directory, $meta)
@@ -38,7 +30,7 @@ const (
 		DECLARE $dir_hash int64;
 		DECLARE $name AS Utf8;
 
-		DELETE FROM file_meta 
+		DELETE FROM ` + asql.DEFAULT_TABLE + ` 
 		WHERE dir_hash == $dir_hash AND name == $name;
 		COMMIT;`
 
@@ -54,11 +46,11 @@ const (
 		DECLARE $dir_hash int64;
 		DECLARE $directory AS Utf8;
 
-		DELETE FROM file_meta 
+		DELETE FROM ` + asql.DEFAULT_TABLE + ` 
 		WHERE dir_hash == $dir_hash AND directory == $directory;
 		COMMIT;`
 
-	ListDirectoryQuery = `
+	listDirectoryQuery = `
 		DECLARE $dir_hash int64;
 		DECLARE $directory AS Utf8;
 		DECLARE $start_name AS Utf8;
@@ -66,7 +58,7 @@ const (
 		DECLARE $limit AS int64;
 		
 		SELECT name, meta
-		FROM file_meta
+		FROM ` + asql.DEFAULT_TABLE + `
 		WHERE dir_hash == $dir_hash AND directory == $directory and name %s $start_name and name LIKE '$prefix%%'
 		ORDER BY name ASC LIMIT $limit;`
 )
diff --git a/weed/filer/ydb/ydb_store.go b/weed/filer/ydb/ydb_store.go
index 4f3477471..9f136703b 100644
--- a/weed/filer/ydb/ydb_store.go
+++ b/weed/filer/ydb/ydb_store.go
@@ -4,17 +4,20 @@ import (
 	"context"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/filer/abstract_sql"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
-	environ "github.com/ydb-platform/ydb-go-sdk-auth-environ"
-	ydb "github.com/ydb-platform/ydb-go-sdk/v3"
+	"github.com/ydb-platform/ydb-go-sdk-auth-environ"
+	"github.com/ydb-platform/ydb-go-sdk/v3"
 	"github.com/ydb-platform/ydb-go-sdk/v3/sugar"
 	"github.com/ydb-platform/ydb-go-sdk/v3/table"
 	"github.com/ydb-platform/ydb-go-sdk/v3/table/result/named"
 	"github.com/ydb-platform/ydb-go-sdk/v3/table/types"
+	"os"
 	"path"
 	"strings"
+	"sync"
 	"time"
 )
 
@@ -31,10 +34,12 @@ var (
 )
 
 type YdbStore struct {
-	SupportBucketTable bool
 	DB                 ydb.Connection
 	dirBuckets         string
 	tablePathPrefix    string
+	SupportBucketTable bool
+	dbs                map[string]bool
+	dbsLock            sync.Mutex
 }
 
 func init() {
@@ -60,6 +65,7 @@ func (store *YdbStore) initialize(dirBuckets string, dsn string, tablePathPrefix
 	store.dirBuckets = dirBuckets
 	store.tablePathPrefix = tablePathPrefix
 	store.SupportBucketTable = useBucketPrefix
+	store.dbs = make(map[string]bool)
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	if connectionTimeOut == 0 {
@@ -72,6 +78,9 @@ func (store *YdbStore) initialize(dirBuckets string, dsn string, tablePathPrefix
 	if poolSizeLimit > 0 {
 		opts = append(opts, ydb.WithSessionPoolSizeLimit(poolSizeLimit))
 	}
+	if dsn == "" {
+		dsn = os.Getenv("YDB_CONNECTION_STRING")
+	}
 	store.DB, err = ydb.Open(ctx, dsn, opts...)
 	if err != nil {
 		_ = store.DB.Close(ctx)
@@ -79,6 +88,7 @@ func (store *YdbStore) initialize(dirBuckets string, dsn string, tablePathPrefix
 		return fmt.Errorf("can not connect to %s error:%v", dsn, err)
 	}
 	defer func() { _ = store.DB.Close(ctx) }()
+
 	store.tablePathPrefix = path.Join(store.DB.Name(), tablePathPrefix)
 	if err = sugar.RemoveRecursive(ctx, store.DB, store.tablePathPrefix); err != nil {
 		return fmt.Errorf("RemoveRecursive %s : %v", store.tablePathPrefix, err)
@@ -86,6 +96,18 @@ func (store *YdbStore) initialize(dirBuckets string, dsn string, tablePathPrefix
 	if err = sugar.MakeRecursive(ctx, store.DB, store.tablePathPrefix); err != nil {
 		return fmt.Errorf("MakeRecursive %s : %v", store.tablePathPrefix, err)
 	}
+
+	whoAmI, err := store.DB.Discovery().WhoAmI(ctx)
+	if err != nil {
+		return fmt.Errorf("connect to %s error:%v", dsn, err)
+	}
+	glog.V(0).Infof("connected to ydb: %s", whoAmI.String())
+
+	tablePath := path.Join(store.tablePathPrefix, abstract_sql.DEFAULT_TABLE)
+	if err := store.createTable(ctx, tablePath); err != nil {
+		glog.Errorf("createTable %s: %v", tablePath, err)
+	}
+
 	return nil
 }
 
@@ -102,11 +124,11 @@ func (store *YdbStore) insertOrUpdateEntry(ctx context.Context, entry *filer.Ent
 
 	fileMeta := FileMeta{util.HashStringToLong(dir), name, dir, meta}
 	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) (err error) {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), query))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dir), query))
 		if err != nil {
 			return fmt.Errorf("Prepare %s : %v", dir, err)
 		}
-		_, _, err = stmt.Execute(ctx, rwTX, fileMeta.QueryParameters())
+		_, _, err = stmt.Execute(ctx, rwTX, fileMeta.queryParameters())
 		return err
 	})
 }
@@ -124,7 +146,7 @@ func (store *YdbStore) FindEntry(ctx context.Context, fullpath util.FullPath) (e
 	var data []byte
 	entryFound := false
 	err = store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) error {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), findQuery))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dir), findQuery))
 		if err != nil {
 			return fmt.Errorf("Prepare %s : %v", entry.FullPath, err)
 		}
@@ -163,7 +185,7 @@ func (store *YdbStore) FindEntry(ctx context.Context, fullpath util.FullPath) (e
 func (store *YdbStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) {
 	dir, name := fullpath.DirAndName()
 	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) (err error) {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), deleteQuery))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dir), deleteQuery))
 		if err != nil {
 			return fmt.Errorf("Prepare %s : %v", dir, err)
 		}
@@ -177,7 +199,7 @@ func (store *YdbStore) DeleteEntry(ctx context.Context, fullpath util.FullPath)
 func (store *YdbStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
 	dir, _ := fullpath.DirAndName()
 	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) (err error) {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), deleteFolderChildrenQuery))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dir), deleteFolderChildrenQuery))
 		if err != nil {
 			return fmt.Errorf("Prepare %s : %v", dir, err)
 		}
@@ -199,7 +221,7 @@ func (store *YdbStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath
 		startFileCompOp = ">="
 	}
 	err = store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) error {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dir), fmt.Sprintf(ListDirectoryQuery, startFileCompOp)))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dir), fmt.Sprintf(listDirectoryQuery, startFileCompOp)))
 		if err != nil {
 			return fmt.Errorf("Prepare %s : %v", dir, err)
 		}
@@ -277,22 +299,91 @@ func (store *YdbStore) Shutdown() {
 	_ = store.DB.Close(context.Background())
 }
 
-func (store *YdbStore) getPrefix(dir string) string {
+func (store *YdbStore) CanDropWholeBucket() bool {
+	return store.SupportBucketTable
+}
+
+func (store *YdbStore) OnBucketCreation(bucket string) {
+	store.dbsLock.Lock()
+	defer store.dbsLock.Unlock()
+
+	if err := store.createTable(context.Background(), bucket); err != nil {
+		glog.Errorf("createTable %s: %v", bucket, err)
+	}
+
+	if store.dbs == nil {
+		return
+	}
+	store.dbs[bucket] = true
+}
+
+func (store *YdbStore) OnBucketDeletion(bucket string) {
+	store.dbsLock.Lock()
+	defer store.dbsLock.Unlock()
+
+	if err := store.deleteTable(context.Background(), bucket); err != nil {
+		glog.Errorf("deleteTable %s: %v", bucket, err)
+	}
+
+	if store.dbs == nil {
+		return
+	}
+	delete(store.dbs, bucket)
+}
+
+func (store *YdbStore) createTable(ctx context.Context, prefix string) error {
+	e, err := store.DB.Scheme().DescribePath(ctx, prefix)
+	if err != nil {
+		return fmt.Errorf("describe path %s error:%v", prefix, err)
+	}
+	if e.IsTable() {
+		return nil
+	}
+	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) error {
+		return s.CreateTable(ctx, prefix, createTableOptions()...)
+	})
+}
+
+func (store *YdbStore) deleteTable(ctx context.Context, prefix string) error {
 	if !store.SupportBucketTable {
-		return store.tablePathPrefix
+		return nil
+	}
+	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) error {
+		return s.DropTable(ctx, path.Join(prefix, abstract_sql.DEFAULT_TABLE))
+	})
+}
+
+func (store *YdbStore) getPrefix(ctx context.Context, dir string) (tablePathPrefix string) {
+	tablePathPrefix = store.tablePathPrefix
+	if !store.SupportBucketTable {
+		return
 	}
 
 	prefixBuckets := store.dirBuckets + "/"
 	if strings.HasPrefix(dir, prefixBuckets) {
 		// detect bucket
 		bucketAndDir := dir[len(prefixBuckets):]
-		if t := strings.Index(bucketAndDir, "/"); t > 0 {
-			return path.Join(bucketAndDir[:t], store.tablePathPrefix)
+		t := strings.Index(bucketAndDir, "/")
+		if t < 0 {
+			return
 		}
-	}
-	return store.tablePathPrefix
-}
+		bucket := bucketAndDir[:t]
 
-func (store *YdbStore) withPragma(prefix, query string) string {
-	return `PRAGMA TablePathPrefix("` + prefix + `");` + query
+		if bucket != "" {
+			return
+		}
+		store.dbsLock.Lock()
+		defer store.dbsLock.Unlock()
+
+		if _, found := store.dbs[bucket]; !found {
+			if err := store.createTable(ctx,
+				path.Join(store.tablePathPrefix, bucket, abstract_sql.DEFAULT_TABLE)); err == nil {
+				store.dbs[bucket] = true
+			} else {
+				glog.Errorf("createTable %s: %v", bucket, err)
+			}
+		}
+		tablePathPrefix = path.Join(store.tablePathPrefix, bucket)
+	}
+	return
 }
diff --git a/weed/filer/ydb/ydb_store_kv.go b/weed/filer/ydb/ydb_store_kv.go
index b2a7af74f..81ac6446b 100644
--- a/weed/filer/ydb/ydb_store_kv.go
+++ b/weed/filer/ydb/ydb_store_kv.go
@@ -15,11 +15,11 @@ func (store *YdbStore) KvPut(ctx context.Context, key []byte, value []byte) (err
 	dirStr, dirHash, name := abstract_sql.GenDirAndName(key)
 	fileMeta := FileMeta{dirHash, name, dirStr, value}
 	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) (err error) {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dirStr), insertQuery))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dirStr), insertQuery))
 		if err != nil {
 			return fmt.Errorf("Prepare %s: %v", util.NewFullPath(dirStr, name), err)
 		}
-		_, _, err = stmt.Execute(ctx, rwTX, fileMeta.QueryParameters())
+		_, _, err = stmt.Execute(ctx, rwTX, fileMeta.queryParameters())
 		if err != nil {
 			return fmt.Errorf("kv put %s: %v", util.NewFullPath(dirStr, name), err)
 		}
@@ -31,7 +31,7 @@ func (store *YdbStore) KvGet(ctx context.Context, key []byte) (value []byte, err
 	dirStr, dirHash, name := abstract_sql.GenDirAndName(key)
 	valueFound := false
 	err = store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) error {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dirStr), findQuery))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dirStr), findQuery))
 		if err != nil {
 			return fmt.Errorf("Prepare %s: %v", util.NewFullPath(dirStr, name), err)
 		}
@@ -62,7 +62,7 @@ func (store *YdbStore) KvGet(ctx context.Context, key []byte) (value []byte, err
 func (store *YdbStore) KvDelete(ctx context.Context, key []byte) (err error) {
 	dirStr, dirHash, name := abstract_sql.GenDirAndName(key)
 	return store.DB.Table().Do(ctx, func(ctx context.Context, s table.Session) (err error) {
-		stmt, err := s.Prepare(ctx, store.withPragma(store.getPrefix(dirStr), insertQuery))
+		stmt, err := s.Prepare(ctx, withPragma(store.getPrefix(ctx, dirStr), insertQuery))
 		if err != nil {
 			return fmt.Errorf("Prepare %s: %v", util.NewFullPath(dirStr, name), err)
 		}
diff --git a/weed/filer/ydb/ydb_types.go b/weed/filer/ydb/ydb_types.go
index fb1df3eee..3c381797a 100644
--- a/weed/filer/ydb/ydb_types.go
+++ b/weed/filer/ydb/ydb_types.go
@@ -2,6 +2,7 @@ package ydb
 
 import (
 	"github.com/ydb-platform/ydb-go-sdk/v3/table"
+	"github.com/ydb-platform/ydb-go-sdk/v3/table/options"
 	"github.com/ydb-platform/ydb-go-sdk/v3/table/types"
 )
 
@@ -18,10 +19,23 @@ type FileMeta struct {
 //ydb:gen scan,value
 type FileMetas []FileMeta
 
-func (fm *FileMeta) QueryParameters() *table.QueryParameters {
+func (fm *FileMeta) queryParameters() *table.QueryParameters {
 	return table.NewQueryParameters(
 		table.ValueParam("$dir_hash", types.Int64Value(fm.DirHash)),
 		table.ValueParam("$name", types.UTF8Value(fm.Name)),
 		table.ValueParam("$directory", types.UTF8Value(fm.Directory)),
 		table.ValueParam("$meta", types.StringValue(fm.Meta)))
 }
+
+func createTableOptions() []options.CreateTableOption {
+	return []options.CreateTableOption{
+		options.WithColumn("dir_hash", types.TypeUint64),
+		options.WithColumn("name", types.TypeUTF8),
+		options.WithColumn("directory", types.TypeUTF8),
+		options.WithColumn("meta", types.TypeString),
+		options.WithPrimaryKeyColumn("dir_hash", "name"),
+	}
+}
+func withPragma(prefix, query string) string {
+	return `PRAGMA TablePathPrefix("` + prefix + `");` + query
+}