filer: DeleteFolderChildren for deleting large folders

weed/command/scaffold.go

@@ -59,15 +59,6 @@ const (
 #    $HOME/.seaweedfs/filer.toml
 #    /etc/seaweedfs/filer.toml
 
-[memory]
-# local in memory, mostly for testing purpose
-enabled = false
-
-[leveldb]
-# local on disk, mostly for simple single-machine setup, fairly scalable
-enabled = false
-dir = "."					# directory to store level db files
-
 [leveldb2]
 # local on disk, mostly for simple single-machine setup, fairly scalable
 # faster than previous leveldb, recommended.

weed/filer2/abstract_sql/abstract_sql_store.go

@@ -10,13 +10,14 @@ import (
 )
 
 type AbstractSqlStore struct {
-	DB               *sql.DB
+	DB                      *sql.DB
-	SqlInsert        string
+	SqlInsert               string
-	SqlUpdate        string
+	SqlUpdate               string
-	SqlFind          string
+	SqlFind                 string
-	SqlDelete        string
+	SqlDelete               string
-	SqlListExclusive string
+	SqlDeleteFolderChildren string
-	SqlListInclusive string
+	SqlListExclusive        string
+	SqlListInclusive        string
 }
 
 type TxOrDB interface {
@@ -132,6 +133,21 @@ func (store *AbstractSqlStore) DeleteEntry(ctx context.Context, fullpath filer2.
 	return nil
 }
 
+func (store *AbstractSqlStore) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) error {
+
+	res, err := store.getTxOrDB(ctx).ExecContext(ctx, store.SqlDeleteFolderChildren, hashToLong(string(fullpath)), fullpath)
+	if err != nil {
+		return fmt.Errorf("deleteFolderChildren %s: %s", fullpath, err)
+	}
+
+	_, err = res.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("deleteFolderChildren %s but no rows affected: %s", fullpath, err)
+	}
+
+	return nil
+}
+
 func (store *AbstractSqlStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool, limit int) (entries []*filer2.Entry, err error) {
 
 	sqlText := store.SqlListExclusive

weed/filer2/cassandra/cassandra_store.go

@@ -112,6 +112,17 @@ func (store *CassandraStore) DeleteEntry(ctx context.Context, fullpath filer2.Fu
 	return nil
 }
 
+func (store *CassandraStore) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) error {
+
+	if err := store.session.Query(
+		"DELETE FROM filemeta WHERE directory=?",
+		fullpath).Exec(); err != nil {
+		return fmt.Errorf("delete %s : %v", fullpath, err)
+	}
+
+	return nil
+}
+
 func (store *CassandraStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool,
 	limit int) (entries []*filer2.Entry, err error) {
 

weed/filer2/etcd/etcd_store.go

@@ -123,6 +123,16 @@ func (store *EtcdStore) DeleteEntry(ctx context.Context, fullpath filer2.FullPat
 	return nil
 }
 
+func (store *EtcdStore) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) (err error) {
+	directoryPrefix := genDirectoryKeyPrefix(fullpath, "")
+
+	if _, err := store.client.Delete(ctx, string(directoryPrefix), clientv3.WithPrefix()); err != nil {
+		return fmt.Errorf("deleteFolderChildren %s : %v", fullpath, err)
+	}
+
+	return nil
+}
+
 func (store *EtcdStore) ListDirectoryEntries(
 	ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool, limit int,
 ) (entries []*filer2.Entry, err error) {

weed/filer2/filer.go

@@ -3,7 +3,6 @@ package filer2
 import (
 	"context"
 	"fmt"
-	"math"
 	"os"
 	"path/filepath"
 	"strings"
@@ -207,67 +206,6 @@ func (f *Filer) FindEntry(ctx context.Context, p FullPath) (entry *Entry, err er
 	return f.store.FindEntry(ctx, p)
 }
 
-func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p FullPath, isRecursive bool, ignoreRecursiveError, shouldDeleteChunks bool) (err error) {
-	entry, err := f.FindEntry(ctx, p)
-	if err != nil {
-		return err
-	}
-
-	if entry.IsDirectory() {
-		limit := int(1)
-		if isRecursive {
-			limit = math.MaxInt32
-		}
-		lastFileName := ""
-		includeLastFile := false
-		for limit > 0 {
-			entries, err := f.ListDirectoryEntries(ctx, p, lastFileName, includeLastFile, PaginationSize)
-			if err != nil {
-				glog.Errorf("list folder %s: %v", p, err)
-				return fmt.Errorf("list folder %s: %v", p, err)
-			}
-
-			if len(entries) == 0 {
-				break
-			}
-
-			if isRecursive {
-				for _, sub := range entries {
-					lastFileName = sub.Name()
-					err = f.DeleteEntryMetaAndData(ctx, sub.FullPath, isRecursive, ignoreRecursiveError, shouldDeleteChunks)
-					if err != nil && !ignoreRecursiveError {
-						return err
-					}
-					limit--
-					if limit <= 0 {
-						break
-					}
-				}
-			}
-
-			if len(entries) < PaginationSize {
-				break
-			}
-		}
-
-		f.cacheDelDirectory(string(p))
-
-	}
-
-	if shouldDeleteChunks {
-		f.DeleteChunks(p, entry.Chunks)
-	}
-
-	if p == "/" {
-		return nil
-	}
-	glog.V(3).Infof("deleting entry %v", p)
-
-	f.NotifyUpdateEvent(entry, nil, shouldDeleteChunks)
-
-	return f.store.DeleteEntry(ctx, p)
-}
-
 func (f *Filer) ListDirectoryEntries(ctx context.Context, p FullPath, startFileName string, inclusive bool, limit int) ([]*Entry, error) {
 	if strings.HasSuffix(string(p), "/") && len(p) > 1 {
 		p = p[0 : len(p)-1]

weed/filer2/filer_client_util.go

@@ -3,6 +3,8 @@ package filer2
 import (
 	"context"
 	"fmt"
+	"io"
+	"math"
 	"strings"
 	"sync"
 
@@ -124,35 +126,42 @@ func GetEntry(ctx context.Context, filerClient FilerClient, fullFilePath string)
 	return
 }
 
-func ReadDirAllEntries(ctx context.Context, filerClient FilerClient, fullDirPath string, fn func(entry *filer_pb.Entry)) (err error) {
+func ReadDirAllEntries(ctx context.Context, filerClient FilerClient, fullDirPath, prefix string, fn func(entry *filer_pb.Entry, isLast bool)) (err error) {
 
 	err = filerClient.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
 
 		lastEntryName := ""
 
+		request := &filer_pb.ListEntriesRequest{
+			Directory:         fullDirPath,
+			Prefix:            prefix,
+			StartFromFileName: lastEntryName,
+			Limit:             math.MaxUint32,
+		}
+
+		glog.V(3).Infof("read directory: %v", request)
+		stream, err := client.ListEntries(ctx, request)
+		if err != nil {
+			return fmt.Errorf("list %s: %v", fullDirPath, err)
+		}
+
+		var prevEntry *filer_pb.Entry
 		for {
-
+			resp, recvErr := stream.Recv()
-			request := &filer_pb.ListEntriesRequest{
+			if recvErr != nil {
-				Directory:         fullDirPath,
+				if recvErr == io.EOF {
-				StartFromFileName: lastEntryName,
+					if prevEntry != nil {
-				Limit:             PaginationSize,
+						fn(prevEntry, true)
+					}
+					break
+				} else {
+					return recvErr
+				}
 			}
-
+			if prevEntry != nil {
-			glog.V(3).Infof("read directory: %v", request)
+				fn(prevEntry, false)
-			resp, err := client.ListEntries(ctx, request)
-			if err != nil {
-				return fmt.Errorf("list %s: %v", fullDirPath, err)
 			}
-
+			prevEntry = resp.Entry
-			for _, entry := range resp.Entries {
-				fn(entry)
-				lastEntryName = entry.Name
-			}
-
-			if len(resp.Entries) < PaginationSize {
-				break
-			}
-
 		}
 
 		return nil

weed/filer2/filer_delete_entry.go

@@ -0,0 +1,102 @@
+package filer2
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+)
+
+func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p FullPath, isRecursive bool, ignoreRecursiveError, shouldDeleteChunks bool) (err error) {
+	if p == "/" {
+		return nil
+	}
+
+	entry, findErr := f.FindEntry(ctx, p)
+	if findErr != nil {
+		return findErr
+	}
+
+	var chunks []*filer_pb.FileChunk
+	chunks = append(chunks, entry.Chunks...)
+	if entry.IsDirectory() {
+		// delete the folder children, not including the folder itself
+		var dirChunks []*filer_pb.FileChunk
+		dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, entry, isRecursive, ignoreRecursiveError, shouldDeleteChunks)
+		if err != nil {
+			return fmt.Errorf("delete directory %s: %v", p, err)
+		}
+		chunks = append(chunks, dirChunks...)
+		f.cacheDelDirectory(string(p))
+	}
+	// delete the file or folder
+	err = f.doDeleteEntryMetaAndData(ctx, entry, shouldDeleteChunks)
+	if err != nil {
+		return fmt.Errorf("delete file %s: %v", p, err)
+	}
+
+	if shouldDeleteChunks {
+		go f.DeleteChunks(chunks)
+	}
+
+	return nil
+}
+
+func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry, isRecursive bool, ignoreRecursiveError, shouldDeleteChunks bool) (chunks []*filer_pb.FileChunk, err error) {
+
+	lastFileName := ""
+	includeLastFile := false
+	for {
+		entries, err := f.ListDirectoryEntries(ctx, entry.FullPath, lastFileName, includeLastFile, PaginationSize)
+		if err != nil {
+			glog.Errorf("list folder %s: %v", entry.FullPath, err)
+			return nil, fmt.Errorf("list folder %s: %v", entry.FullPath, err)
+		}
+		if lastFileName == "" && !isRecursive && len(entries) > 0 {
+			// only for first iteration in the loop
+			return nil, fmt.Errorf("fail to delete non-empty folder: %s", entry.FullPath)
+		}
+
+		for _, sub := range entries {
+			lastFileName = sub.Name()
+			var dirChunks []*filer_pb.FileChunk
+			if sub.IsDirectory() {
+				dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, sub, isRecursive, ignoreRecursiveError, shouldDeleteChunks)
+			}
+			if err != nil && !ignoreRecursiveError {
+				return nil, err
+			}
+			if shouldDeleteChunks {
+				chunks = append(chunks, dirChunks...)
+			}
+		}
+
+		if len(entries) < PaginationSize {
+			break
+		}
+	}
+
+	f.cacheDelDirectory(string(entry.FullPath))
+
+	glog.V(3).Infof("deleting directory %v", entry.FullPath)
+
+	if storeDeletionErr := f.store.DeleteFolderChildren(ctx, entry.FullPath); storeDeletionErr != nil {
+		return nil, fmt.Errorf("filer store delete: %v", storeDeletionErr)
+	}
+	f.NotifyUpdateEvent(entry, nil, shouldDeleteChunks)
+
+	return chunks, nil
+}
+
+func (f *Filer) doDeleteEntryMetaAndData(ctx context.Context, entry *Entry, shouldDeleteChunks bool) (err error) {
+
+	glog.V(3).Infof("deleting entry %v", entry.FullPath)
+
+	if storeDeletionErr := f.store.DeleteEntry(ctx, entry.FullPath); storeDeletionErr != nil {
+		return fmt.Errorf("filer store delete: %v", storeDeletionErr)
+	}
+	f.NotifyUpdateEvent(entry, nil, shouldDeleteChunks)
+
+	return nil
+}

weed/filer2/filer_deletion.go

@@ -51,9 +51,8 @@ func (f *Filer) loopProcessingDeletion() {
 	}
 }
 
-func (f *Filer) DeleteChunks(fullpath FullPath, chunks []*filer_pb.FileChunk) {
+func (f *Filer) DeleteChunks(chunks []*filer_pb.FileChunk) {
 	for _, chunk := range chunks {
-		glog.V(3).Infof("deleting %s chunk %s", fullpath, chunk.String())
 		f.fileIdDeletionChan <- chunk.GetFileIdString()
 	}
 }
@@ -70,7 +69,7 @@ func (f *Filer) deleteChunksIfNotNew(oldEntry, newEntry *Entry) {
 		return
 	}
 	if newEntry == nil {
-		f.DeleteChunks(oldEntry.FullPath, oldEntry.Chunks)
+		f.DeleteChunks(oldEntry.Chunks)
 	}
 
 	var toDelete []*filer_pb.FileChunk
@@ -84,5 +83,5 @@ func (f *Filer) deleteChunksIfNotNew(oldEntry, newEntry *Entry) {
 			toDelete = append(toDelete, oldChunk)
 		}
 	}
-	f.DeleteChunks(oldEntry.FullPath, toDelete)
+	f.DeleteChunks(toDelete)
 }

weed/filer2/filerstore.go

@@ -20,6 +20,7 @@ type FilerStore interface {
 	// err == filer2.ErrNotFound if not found
 	FindEntry(context.Context, FullPath) (entry *Entry, err error)
 	DeleteEntry(context.Context, FullPath) (err error)
+	DeleteFolderChildren(context.Context, FullPath) (err error)
 	ListDirectoryEntries(ctx context.Context, dirPath FullPath, startFileName string, includeStartFile bool, limit int) ([]*Entry, error)
 
 	BeginTransaction(ctx context.Context) (context.Context, error)
@@ -97,6 +98,16 @@ func (fsw *FilerStoreWrapper) DeleteEntry(ctx context.Context, fp FullPath) (err
 	return fsw.actualStore.DeleteEntry(ctx, fp)
 }
 
+func (fsw *FilerStoreWrapper) DeleteFolderChildren(ctx context.Context, fp FullPath) (err error) {
+	stats.FilerStoreCounter.WithLabelValues(fsw.actualStore.GetName(), "deleteFolderChildren").Inc()
+	start := time.Now()
+	defer func() {
+		stats.FilerStoreHistogram.WithLabelValues(fsw.actualStore.GetName(), "deleteFolderChildren").Observe(time.Since(start).Seconds())
+	}()
+
+	return fsw.actualStore.DeleteFolderChildren(ctx, fp)
+}
+
 func (fsw *FilerStoreWrapper) ListDirectoryEntries(ctx context.Context, dirPath FullPath, startFileName string, includeStartFile bool, limit int) ([]*Entry, error) {
 	stats.FilerStoreCounter.WithLabelValues(fsw.actualStore.GetName(), "list").Inc()
 	start := time.Now()

weed/filer2/leveldb/leveldb_store.go

@@ -5,12 +5,13 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/chrislusf/seaweedfs/weed/filer2"
-	"github.com/chrislusf/seaweedfs/weed/glog"
-	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/opt"
 	leveldb_util "github.com/syndtr/goleveldb/leveldb/util"
+
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 )
 
 const (
@@ -123,6 +124,34 @@ func (store *LevelDBStore) DeleteEntry(ctx context.Context, fullpath filer2.Full
 	return nil
 }
 
+func (store *LevelDBStore) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) (err error) {
+
+	batch := new(leveldb.Batch)
+
+	directoryPrefix := genDirectoryKeyPrefix(fullpath, "")
+	iter := store.db.NewIterator(&leveldb_util.Range{Start: directoryPrefix}, nil)
+	for iter.Next() {
+		key := iter.Key()
+		if !bytes.HasPrefix(key, directoryPrefix) {
+			break
+		}
+		fileName := getNameFromKey(key)
+		if fileName == "" {
+			continue
+		}
+		batch.Delete([]byte(genKey(string(fullpath), fileName)))
+	}
+	iter.Release()
+
+	err = store.db.Write(batch, nil)
+
+	if err != nil {
+		return fmt.Errorf("delete %s : %v", fullpath, err)
+	}
+
+	return nil
+}
+
 func (store *LevelDBStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool,
 	limit int) (entries []*filer2.Entry, err error) {
 

weed/filer2/leveldb2/leveldb2_store.go

@@ -8,12 +8,13 @@ import (
 	"io"
 	"os"
 
-	"github.com/chrislusf/seaweedfs/weed/filer2"
-	"github.com/chrislusf/seaweedfs/weed/glog"
-	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/opt"
 	leveldb_util "github.com/syndtr/goleveldb/leveldb/util"
+
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	weed_util "github.com/chrislusf/seaweedfs/weed/util"
 )
 
 func init() {
@@ -134,6 +135,34 @@ func (store *LevelDB2Store) DeleteEntry(ctx context.Context, fullpath filer2.Ful
 	return nil
 }
 
+func (store *LevelDB2Store) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) (err error) {
+	directoryPrefix, partitionId := genDirectoryKeyPrefix(fullpath, "", store.dbCount)
+
+	batch := new(leveldb.Batch)
+
+	iter := store.dbs[partitionId].NewIterator(&leveldb_util.Range{Start: directoryPrefix}, nil)
+	for iter.Next() {
+		key := iter.Key()
+		if !bytes.HasPrefix(key, directoryPrefix) {
+			break
+		}
+		fileName := getNameFromKey(key)
+		if fileName == "" {
+			continue
+		}
+		batch.Delete(append(directoryPrefix, []byte(fileName)...))
+	}
+	iter.Release()
+
+	err = store.dbs[partitionId].Write(batch, nil)
+
+	if err != nil {
+		return fmt.Errorf("delete %s : %v", fullpath, err)
+	}
+
+	return nil
+}
+
 func (store *LevelDB2Store) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool,
 	limit int) (entries []*filer2.Entry, err error) {
 

weed/filer2/memdb/memdb_store.go

@@ -1,132 +0,0 @@
-package memdb
-
-import (
-	"context"
-	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/filer2"
-	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/google/btree"
-	"strings"
-	"sync"
-)
-
-func init() {
-	filer2.Stores = append(filer2.Stores, &MemDbStore{})
-}
-
-type MemDbStore struct {
-	tree     *btree.BTree
-	treeLock sync.Mutex
-}
-
-type entryItem struct {
-	*filer2.Entry
-}
-
-func (a entryItem) Less(b btree.Item) bool {
-	return strings.Compare(string(a.FullPath), string(b.(entryItem).FullPath)) < 0
-}
-
-func (store *MemDbStore) GetName() string {
-	return "memory"
-}
-
-func (store *MemDbStore) Initialize(configuration util.Configuration) (err error) {
-	store.tree = btree.New(8)
-	return nil
-}
-
-func (store *MemDbStore) BeginTransaction(ctx context.Context) (context.Context, error) {
-	return ctx, nil
-}
-func (store *MemDbStore) CommitTransaction(ctx context.Context) error {
-	return nil
-}
-func (store *MemDbStore) RollbackTransaction(ctx context.Context) error {
-	return nil
-}
-
-func (store *MemDbStore) InsertEntry(ctx context.Context, entry *filer2.Entry) (err error) {
-	// println("inserting", entry.FullPath)
-	store.treeLock.Lock()
-	store.tree.ReplaceOrInsert(entryItem{entry})
-	store.treeLock.Unlock()
-	return nil
-}
-
-func (store *MemDbStore) UpdateEntry(ctx context.Context, entry *filer2.Entry) (err error) {
-	if _, err = store.FindEntry(ctx, entry.FullPath); err != nil {
-		return fmt.Errorf("no such file %s : %v", entry.FullPath, err)
-	}
-	store.treeLock.Lock()
-	store.tree.ReplaceOrInsert(entryItem{entry})
-	store.treeLock.Unlock()
-	return nil
-}
-
-func (store *MemDbStore) FindEntry(ctx context.Context, fullpath filer2.FullPath) (entry *filer2.Entry, err error) {
-	item := store.tree.Get(entryItem{&filer2.Entry{FullPath: fullpath}})
-	if item == nil {
-		return nil, filer2.ErrNotFound
-	}
-	entry = item.(entryItem).Entry
-	return entry, nil
-}
-
-func (store *MemDbStore) DeleteEntry(ctx context.Context, fullpath filer2.FullPath) (err error) {
-	store.treeLock.Lock()
-	store.tree.Delete(entryItem{&filer2.Entry{FullPath: fullpath}})
-	store.treeLock.Unlock()
-	return nil
-}
-
-func (store *MemDbStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool, limit int) (entries []*filer2.Entry, err error) {
-
-	startFrom := string(fullpath)
-	if startFileName != "" {
-		startFrom = startFrom + "/" + startFileName
-	}
-
-	store.tree.AscendGreaterOrEqual(entryItem{&filer2.Entry{FullPath: filer2.FullPath(startFrom)}},
-		func(item btree.Item) bool {
-			if limit <= 0 {
-				return false
-			}
-			entry := item.(entryItem).Entry
-			// println("checking", entry.FullPath)
-
-			if entry.FullPath == fullpath {
-				// skipping the current directory
-				// println("skipping the folder", entry.FullPath)
-				return true
-			}
-
-			dir, name := entry.FullPath.DirAndName()
-			if name == startFileName {
-				if inclusive {
-					limit--
-					entries = append(entries, entry)
-				}
-				return true
-			}
-
-			// only iterate the same prefix
-			if !strings.HasPrefix(string(entry.FullPath), string(fullpath)) {
-				// println("breaking from", entry.FullPath)
-				return false
-			}
-
-			if dir != string(fullpath) {
-				// this could be items in deeper directories
-				// println("skipping deeper folder", entry.FullPath)
-				return true
-			}
-			// now process the directory items
-			// println("adding entry", entry.FullPath)
-			limit--
-			entries = append(entries, entry)
-			return true
-		},
-	)
-	return entries, nil
-}

weed/filer2/memdb/memdb_store_test.go

@@ -1,149 +0,0 @@
-package memdb
-
-import (
-	"context"
-	"github.com/chrislusf/seaweedfs/weed/filer2"
-	"testing"
-)
-
-func TestCreateAndFind(t *testing.T) {
-	filer := filer2.NewFiler(nil, nil)
-	store := &MemDbStore{}
-	store.Initialize(nil)
-	filer.SetStore(store)
-	filer.DisableDirectoryCache()
-
-	ctx := context.Background()
-
-	fullpath := filer2.FullPath("/home/chris/this/is/one/file1.jpg")
-
-	entry1 := &filer2.Entry{
-		FullPath: fullpath,
-		Attr: filer2.Attr{
-			Mode: 0440,
-			Uid:  1234,
-			Gid:  5678,
-		},
-	}
-
-	if err := filer.CreateEntry(ctx, entry1); err != nil {
-		t.Errorf("create entry %v: %v", entry1.FullPath, err)
-		return
-	}
-
-	entry, err := filer.FindEntry(ctx, fullpath)
-
-	if err != nil {
-		t.Errorf("find entry: %v", err)
-		return
-	}
-
-	if entry.FullPath != entry1.FullPath {
-		t.Errorf("find wrong entry: %v", entry.FullPath)
-		return
-	}
-
-}
-
-func TestCreateFileAndList(t *testing.T) {
-	filer := filer2.NewFiler(nil, nil)
-	store := &MemDbStore{}
-	store.Initialize(nil)
-	filer.SetStore(store)
-	filer.DisableDirectoryCache()
-
-	ctx := context.Background()
-
-	entry1 := &filer2.Entry{
-		FullPath: filer2.FullPath("/home/chris/this/is/one/file1.jpg"),
-		Attr: filer2.Attr{
-			Mode: 0440,
-			Uid:  1234,
-			Gid:  5678,
-		},
-	}
-
-	entry2 := &filer2.Entry{
-		FullPath: filer2.FullPath("/home/chris/this/is/one/file2.jpg"),
-		Attr: filer2.Attr{
-			Mode: 0440,
-			Uid:  1234,
-			Gid:  5678,
-		},
-	}
-
-	filer.CreateEntry(ctx, entry1)
-	filer.CreateEntry(ctx, entry2)
-
-	// checking the 2 files
-	entries, err := filer.ListDirectoryEntries(ctx, filer2.FullPath("/home/chris/this/is/one/"), "", false, 100)
-
-	if err != nil {
-		t.Errorf("list entries: %v", err)
-		return
-	}
-
-	if len(entries) != 2 {
-		t.Errorf("list entries count: %v", len(entries))
-		return
-	}
-
-	if entries[0].FullPath != entry1.FullPath {
-		t.Errorf("find wrong entry 1: %v", entries[0].FullPath)
-		return
-	}
-
-	if entries[1].FullPath != entry2.FullPath {
-		t.Errorf("find wrong entry 2: %v", entries[1].FullPath)
-		return
-	}
-
-	// checking the offset
-	entries, err = filer.ListDirectoryEntries(ctx, filer2.FullPath("/home/chris/this/is/one/"), "file1.jpg", false, 100)
-	if len(entries) != 1 {
-		t.Errorf("list entries count: %v", len(entries))
-		return
-	}
-
-	// checking one upper directory
-	entries, _ = filer.ListDirectoryEntries(ctx, filer2.FullPath("/home/chris/this/is"), "", false, 100)
-	if len(entries) != 1 {
-		t.Errorf("list entries count: %v", len(entries))
-		return
-	}
-
-	// checking root directory
-	entries, _ = filer.ListDirectoryEntries(ctx, filer2.FullPath("/"), "", false, 100)
-	if len(entries) != 1 {
-		t.Errorf("list entries count: %v", len(entries))
-		return
-	}
-
-	// add file3
-	file3Path := filer2.FullPath("/home/chris/this/is/file3.jpg")
-	entry3 := &filer2.Entry{
-		FullPath: file3Path,
-		Attr: filer2.Attr{
-			Mode: 0440,
-			Uid:  1234,
-			Gid:  5678,
-		},
-	}
-	filer.CreateEntry(ctx, entry3)
-
-	// checking one upper directory
-	entries, _ = filer.ListDirectoryEntries(ctx, filer2.FullPath("/home/chris/this/is"), "", false, 100)
-	if len(entries) != 2 {
-		t.Errorf("list entries count: %v", len(entries))
-		return
-	}
-
-	// delete file and count
-	filer.DeleteEntryMetaAndData(ctx, file3Path, false, false, false)
-	entries, _ = filer.ListDirectoryEntries(ctx, filer2.FullPath("/home/chris/this/is"), "", false, 100)
-	if len(entries) != 1 {
-		t.Errorf("list entries count: %v", len(entries))
-		return
-	}
-
-}

weed/filer2/mysql/mysql_store.go

@@ -46,6 +46,7 @@ func (store *MysqlStore) initialize(user, password, hostname string, port int, d
 	store.SqlUpdate = "UPDATE filemeta SET meta=? WHERE dirhash=? AND name=? AND directory=?"
 	store.SqlFind = "SELECT meta FROM filemeta WHERE dirhash=? AND name=? AND directory=?"
 	store.SqlDelete = "DELETE FROM filemeta WHERE dirhash=? AND name=? AND directory=?"
+	store.SqlDeleteFolderChildren = "DELETE FROM filemeta WHERE dirhash=? AND directory=?"
 	store.SqlListExclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=? AND name>? AND directory=? ORDER BY NAME ASC LIMIT ?"
 	store.SqlListInclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=? AND name>=? AND directory=? ORDER BY NAME ASC LIMIT ?"
 

weed/filer2/postgres/postgres_store.go

@@ -45,6 +45,7 @@ func (store *PostgresStore) initialize(user, password, hostname string, port int
 	store.SqlUpdate = "UPDATE filemeta SET meta=$1 WHERE dirhash=$2 AND name=$3 AND directory=$4"
 	store.SqlFind = "SELECT meta FROM filemeta WHERE dirhash=$1 AND name=$2 AND directory=$3"
 	store.SqlDelete = "DELETE FROM filemeta WHERE dirhash=$1 AND name=$2 AND directory=$3"
+	store.SqlDeleteFolderChildren = "DELETE FROM filemeta WHERE dirhash=$1 AND directory=$2"
 	store.SqlListExclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=$1 AND name>$2 AND directory=$3 ORDER BY NAME ASC LIMIT $4"
 	store.SqlListInclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=$1 AND name>=$2 AND directory=$3 ORDER BY NAME ASC LIMIT $4"
 

weed/filer2/redis/universal_redis_store.go

@@ -99,6 +99,24 @@ func (store *UniversalRedisStore) DeleteEntry(ctx context.Context, fullpath file
 	return nil
 }
 
+func (store *UniversalRedisStore) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) (err error) {
+
+	members, err := store.Client.SMembers(genDirectoryListKey(string(fullpath))).Result()
+	if err != nil {
+		return fmt.Errorf("delete folder %s : %v", fullpath, err)
+	}
+
+	for _, fileName := range members {
+		path := filer2.NewFullPath(string(fullpath), fileName)
+		_, err = store.Client.Del(string(path)).Result()
+		if err != nil {
+			return fmt.Errorf("delete %s in parent dir: %v", fullpath, err)
+		}
+	}
+
+	return nil
+}
+
 func (store *UniversalRedisStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool,
 	limit int) (entries []*filer2.Entry, err error) {
 

weed/filer2/tikv/tikv_store.go

@@ -141,6 +141,38 @@ func (store *TikvStore) DeleteEntry(ctx context.Context, fullpath filer2.FullPat
 	return nil
 }
 
+func (store *TikvStore) DeleteFolderChildren(ctx context.Context, fullpath filer2.FullPath) (err error) {
+
+	directoryPrefix := genDirectoryKeyPrefix(fullpath, "")
+
+	tx := store.getTx(ctx)
+
+	iter, err := tx.Iter(directoryPrefix, nil)
+	if err != nil {
+		return fmt.Errorf("deleteFolderChildren %s: %v", fullpath, err)
+	}
+	defer iter.Close()
+	for iter.Valid() {
+		key := iter.Key()
+		if !bytes.HasPrefix(key, directoryPrefix) {
+			break
+		}
+		fileName := getNameFromKey(key)
+		if fileName == "" {
+			iter.Next()
+			continue
+		}
+
+		if err = tx.Delete(genKey(string(fullpath), fileName)); err != nil {
+			return fmt.Errorf("delete %s : %v", fullpath, err)
+		}
+
+		iter.Next()
+	}
+
+	return nil
+}
+
 func (store *TikvStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool,
 	limit int) (entries []*filer2.Entry, err error) {
 

weed/s3api/s3api_server.go

@@ -1,12 +1,6 @@
 package s3api
 
 import (
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/cassandra"
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/leveldb"
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/memdb"
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/mysql"
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/postgres"
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/redis"
 	"github.com/gorilla/mux"
 	"google.golang.org/grpc"
 	"net/http"

weed/server/filer_grpc_server.go

@@ -140,7 +140,7 @@ func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntr
 	})
 
 	if err == nil {
-		fs.filer.DeleteChunks(fullpath, garbages)
+		fs.filer.DeleteChunks(garbages)
 	}
 
 	return &filer_pb.CreateEntryResponse{}, err
@@ -189,8 +189,8 @@ func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntr
 	}
 
 	if err = fs.filer.UpdateEntry(ctx, entry, newEntry); err == nil {
-		fs.filer.DeleteChunks(entry.FullPath, unusedChunks)
+		fs.filer.DeleteChunks(unusedChunks)
-		fs.filer.DeleteChunks(entry.FullPath, garbages)
+		fs.filer.DeleteChunks(garbages)
 	}
 
 	fs.filer.NotifyUpdateEvent(entry, newEntry, true)

weed/server/filer_server.go

@@ -18,7 +18,6 @@ import (
 	_ "github.com/chrislusf/seaweedfs/weed/filer2/etcd"
 	_ "github.com/chrislusf/seaweedfs/weed/filer2/leveldb"
 	_ "github.com/chrislusf/seaweedfs/weed/filer2/leveldb2"
-	_ "github.com/chrislusf/seaweedfs/weed/filer2/memdb"
 	_ "github.com/chrislusf/seaweedfs/weed/filer2/mysql"
 	_ "github.com/chrislusf/seaweedfs/weed/filer2/postgres"
 	_ "github.com/chrislusf/seaweedfs/weed/filer2/redis"

weed/server/filer_server_handlers_write.go

@@ -194,7 +194,7 @@ func (fs *FilerServer) updateFilerStore(ctx context.Context, r *http.Request, w
 	}
 	// glog.V(4).Infof("saving %s => %+v", path, entry)
 	if dbErr := fs.filer.CreateEntry(ctx, entry); dbErr != nil {
-		fs.filer.DeleteChunks(entry.FullPath, entry.Chunks)
+		fs.filer.DeleteChunks(entry.Chunks)
 		glog.V(0).Infof("failing to write %s to filer server : %v", path, dbErr)
 		writeJsonError(w, r, http.StatusInternalServerError, dbErr)
 		err = dbErr

weed/server/filer_server_handlers_write_autochunk.go

@@ -177,7 +177,7 @@ func (fs *FilerServer) doAutoChunk(ctx context.Context, w http.ResponseWriter, r
 		Chunks: fileChunks,
 	}
 	if dbErr := fs.filer.CreateEntry(ctx, entry); dbErr != nil {
-		fs.filer.DeleteChunks(entry.FullPath, entry.Chunks)
+		fs.filer.DeleteChunks(entry.Chunks)
 		replyerr = dbErr
 		filerResult.Error = dbErr.Error()
 		glog.V(0).Infof("failing to write %s to filer server : %v", path, dbErr)