purge old cache implementation

weed/command/mount.go

@@ -20,7 +20,6 @@ type MountOptions struct {
 	umaskString                 *string
 	nonempty                    *bool
 	outsideContainerClusterMode *bool
-	asyncMetaDataCaching        *bool
 }
 
 var (
@@ -48,7 +47,6 @@ func init() {
 	mountCpuProfile = cmdMount.Flag.String("cpuprofile", "", "cpu profile output file")
 	mountMemProfile = cmdMount.Flag.String("memprofile", "", "memory profile output file")
 	mountOptions.outsideContainerClusterMode = cmdMount.Flag.Bool("outsideContainerClusterMode", false, "allows other users to access the file system")
-	mountOptions.asyncMetaDataCaching = cmdMount.Flag.Bool("asyncMetaDataCaching", true, "async meta data caching. this feature will be permanent and this option will be removed.")
 }
 
 var cmdMount = &Command{

weed/command/mount_std.go

@@ -167,7 +167,6 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		MountMtime:                  time.Now(),
 		Umask:                       umask,
 		OutsideContainerClusterMode: *mountOptions.outsideContainerClusterMode,
-		AsyncMetaDataCaching:        *mountOptions.asyncMetaDataCaching,
 		Cipher:                      cipher,
 	})
 

weed/filesys/dir.go

@@ -89,22 +89,18 @@ func (dir *Dir) setRootDirAttributes(attr *fuse.Attr) {
 }
 
 func (dir *Dir) newFile(name string, entry *filer_pb.Entry) fs.Node {
-	return dir.wfs.fsNodeCache.EnsureFsNode(util.NewFullPath(dir.FullPath(), name), func() fs.Node {
-		return &File{
-			Name:           name,
-			dir:            dir,
-			wfs:            dir.wfs,
-			entry:          entry,
-			entryViewCache: nil,
-		}
-	})
+	return &File{
+		Name:           name,
+		dir:            dir,
+		wfs:            dir.wfs,
+		entry:          entry,
+		entryViewCache: nil,
+	}
 }
 
 func (dir *Dir) newDirectory(fullpath util.FullPath, entry *filer_pb.Entry) fs.Node {
 
-	return dir.wfs.fsNodeCache.EnsureFsNode(fullpath, func() fs.Node {
-		return &Dir{name: entry.Name, wfs: dir.wfs, entry: entry, parent: dir}
-	})
+	return &Dir{name: entry.Name, wfs: dir.wfs, entry: entry, parent: dir}
 
 }
 
@@ -139,9 +135,7 @@ func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
 			return fuse.EIO
 		}
 
-		if dir.wfs.option.AsyncMetaDataCaching {
-			dir.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
-		}
+		dir.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
 
 		return nil
 	}); err != nil {
@@ -190,9 +184,7 @@ func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, err
 			return err
 		}
 
-		if dir.wfs.option.AsyncMetaDataCaching {
-			dir.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
-		}
+		dir.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
 
 		return nil
 	})
@@ -213,15 +205,12 @@ func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.
 	glog.V(4).Infof("dir Lookup %s: %s by %s", dir.FullPath(), req.Name, req.Header.String())
 
 	fullFilePath := util.NewFullPath(dir.FullPath(), req.Name)
-	entry := dir.wfs.cacheGet(fullFilePath)
 
-	if dir.wfs.option.AsyncMetaDataCaching {
-		cachedEntry, cacheErr := dir.wfs.metaCache.FindEntry(context.Background(), fullFilePath)
-		if cacheErr == filer_pb.ErrNotFound {
-			return nil, fuse.ENOENT
-		}
-		entry = cachedEntry.ToProtoEntry()
+	cachedEntry, cacheErr := dir.wfs.metaCache.FindEntry(context.Background(), fullFilePath)
+	if cacheErr == filer_pb.ErrNotFound {
+		return nil, fuse.ENOENT
 	}
+	entry := cachedEntry.ToProtoEntry()
 
 	if entry == nil {
 		// glog.V(3).Infof("dir Lookup cache miss %s", fullFilePath)
@@ -230,7 +219,6 @@ func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.
 			glog.V(1).Infof("dir GetEntry %s: %v", fullFilePath, err)
 			return nil, fuse.ENOENT
 		}
-		dir.wfs.cacheSet(fullFilePath, entry, 5*time.Minute)
 	} else {
 		glog.V(4).Infof("dir Lookup cache hit %s", fullFilePath)
 	}
@@ -262,7 +250,6 @@ func (dir *Dir) ReadDirAll(ctx context.Context) (ret []fuse.Dirent, err error) {
 
 	glog.V(3).Infof("dir ReadDirAll %s", dir.FullPath())
 
-	cacheTtl := 5 * time.Minute
 	processEachEntryFn := func(entry *filer_pb.Entry, isLast bool) error {
 		fullpath := util.NewFullPath(dir.FullPath(), entry.Name)
 		inode := fullpath.AsInode()
@@ -273,29 +260,19 @@ func (dir *Dir) ReadDirAll(ctx context.Context) (ret []fuse.Dirent, err error) {
 			dirent := fuse.Dirent{Inode: inode, Name: entry.Name, Type: fuse.DT_File}
 			ret = append(ret, dirent)
 		}
-		dir.wfs.cacheSet(fullpath, entry, cacheTtl)
 		return nil
 	}
 
-	if dir.wfs.option.AsyncMetaDataCaching {
-		listedEntries, listErr := dir.wfs.metaCache.ListDirectoryEntries(context.Background(), util.FullPath(dir.FullPath()), "", false, int(dir.wfs.option.DirListCacheLimit))
-		if listErr != nil {
-			glog.Errorf("list meta cache: %v", listErr)
-			return nil, fuse.EIO
-		}
-		for _, cachedEntry := range listedEntries {
-			processEachEntryFn(cachedEntry.ToProtoEntry(), false)
-		}
-		return
+	listedEntries, listErr := dir.wfs.metaCache.ListDirectoryEntries(context.Background(), util.FullPath(dir.FullPath()), "", false, int(dir.wfs.option.DirListCacheLimit))
+	if listErr != nil {
+		glog.Errorf("list meta cache: %v", listErr)
+		return nil, fuse.EIO
 	}
-
-	readErr := filer_pb.ReadDirAllEntries(dir.wfs, util.FullPath(dir.FullPath()), "", processEachEntryFn)
-	if readErr != nil {
-		glog.V(0).Infof("list %s: %v", dir.FullPath(), err)
-		return ret, fuse.EIO
+	for _, cachedEntry := range listedEntries {
+		processEachEntryFn(cachedEntry.ToProtoEntry(), false)
 	}
+	return
 
-	return ret, err
 }
 
 func (dir *Dir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
@@ -321,12 +298,7 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 
 	dir.wfs.deleteFileChunks(entry.Chunks)
 
-	dir.wfs.cacheDelete(filePath)
-	dir.wfs.fsNodeCache.DeleteFsNode(filePath)
-
-	if dir.wfs.option.AsyncMetaDataCaching {
-		dir.wfs.metaCache.DeleteEntry(context.Background(), filePath)
-	}
+	dir.wfs.metaCache.DeleteEntry(context.Background(), filePath)
 
 	glog.V(3).Infof("remove file: %v", req)
 	err = filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, false, false, false)
@@ -342,12 +314,8 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
 
 	t := util.NewFullPath(dir.FullPath(), req.Name)
-	dir.wfs.cacheDelete(t)
-	dir.wfs.fsNodeCache.DeleteFsNode(t)
 
-	if dir.wfs.option.AsyncMetaDataCaching {
-		dir.wfs.metaCache.DeleteEntry(context.Background(), t)
-	}
+	dir.wfs.metaCache.DeleteEntry(context.Background(), t)
 
 	glog.V(3).Infof("remove directory entry: %v", req)
 	err := filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, true, false, false)
@@ -384,8 +352,6 @@ func (dir *Dir) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fus
 		dir.entry.Attributes.Mtime = req.Mtime.Unix()
 	}
 
-	dir.wfs.cacheDelete(util.FullPath(dir.FullPath()))
-
 	return dir.saveEntry()
 
 }
@@ -402,8 +368,6 @@ func (dir *Dir) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
 		return err
 	}
 
-	dir.wfs.cacheDelete(util.FullPath(dir.FullPath()))
-
 	return dir.saveEntry()
 
 }
@@ -420,8 +384,6 @@ func (dir *Dir) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) e
 		return err
 	}
 
-	dir.wfs.cacheDelete(util.FullPath(dir.FullPath()))
-
 	return dir.saveEntry()
 
 }
@@ -444,8 +406,6 @@ func (dir *Dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp
 
 func (dir *Dir) Forget() {
 	glog.V(3).Infof("Forget dir %s", dir.FullPath())
-
-	dir.wfs.fsNodeCache.DeleteFsNode(util.FullPath(dir.FullPath()))
 }
 
 func (dir *Dir) maybeLoadEntry() error {
@@ -478,9 +438,7 @@ func (dir *Dir) saveEntry() error {
 			return fuse.EIO
 		}
 
-		if dir.wfs.option.AsyncMetaDataCaching {
-			dir.wfs.metaCache.UpdateEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
-		}
+		dir.wfs.metaCache.UpdateEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
 
 		return nil
 	})

weed/filesys/dir_link.go

@@ -42,9 +42,7 @@ func (dir *Dir) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node,
 			return fuse.EIO
 		}
 
-		if dir.wfs.option.AsyncMetaDataCaching {
-			dir.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
-		}
+		dir.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
 
 		return nil
 	})

weed/filesys/dir_rename.go

@@ -38,14 +38,5 @@ func (dir *Dir) Rename(ctx context.Context, req *fuse.RenameRequest, newDirector
 
 	})
 
-	if err == nil {
-		dir.wfs.cacheDelete(newPath)
-		dir.wfs.cacheDelete(oldPath)
-
-		// fmt.Printf("rename path: %v => %v\n", oldPath, newPath)
-		dir.wfs.fsNodeCache.Move(oldPath, newPath)
-
-	}
-
 	return err
 }

weed/filesys/file.go

@@ -150,8 +150,6 @@ func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *f
 		return nil
 	}
 
-	file.wfs.cacheDelete(file.fullpath())
-
 	return file.saveEntry()
 
 }
@@ -168,8 +166,6 @@ func (file *File) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error
 		return err
 	}
 
-	file.wfs.cacheDelete(file.fullpath())
-
 	return file.saveEntry()
 
 }
@@ -186,8 +182,6 @@ func (file *File) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest)
 		return err
 	}
 
-	file.wfs.cacheDelete(file.fullpath())
-
 	return file.saveEntry()
 
 }
@@ -219,7 +213,6 @@ func (file *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
 func (file *File) Forget() {
 	t := util.NewFullPath(file.dir.FullPath(), file.Name)
 	glog.V(3).Infof("Forget file %s", t)
-	file.wfs.fsNodeCache.DeleteFsNode(t)
 }
 
 func (file *File) maybeLoadEntry(ctx context.Context) error {
@@ -278,9 +271,7 @@ func (file *File) saveEntry() error {
 			return fuse.EIO
 		}
 
-		if file.wfs.option.AsyncMetaDataCaching {
-			file.wfs.metaCache.UpdateEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
-		}
+		file.wfs.metaCache.UpdateEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
 
 		return nil
 	})

weed/filesys/filehandle.go

@@ -214,9 +214,7 @@ func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 			return fmt.Errorf("fh flush create %s: %v", fh.f.fullpath(), err)
 		}
 
-		if fh.f.wfs.option.AsyncMetaDataCaching {
-			fh.f.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
-		}
+		fh.f.wfs.metaCache.InsertEntry(context.Background(), filer2.FromPbEntry(request.Directory, request.Entry))
 
 		fh.f.wfs.deleteFileChunks(garbages)
 		for i, chunk := range garbages {

weed/filesys/fscache.go

@@ -1,207 +0,0 @@
-package filesys
-
-import (
-	"sync"
-
-	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/seaweedfs/fuse/fs"
-)
-
-type FsCache struct {
-	root *FsNode
-	sync.RWMutex
-}
-type FsNode struct {
-	parent       *FsNode
-	node         fs.Node
-	name         string
-	childrenLock sync.RWMutex
-	children     map[string]*FsNode
-}
-
-func newFsCache(root fs.Node) *FsCache {
-	return &FsCache{
-		root: &FsNode{
-			node: root,
-		},
-	}
-}
-
-func (c *FsCache) GetFsNode(path util.FullPath) fs.Node {
-
-	c.RLock()
-	defer c.RUnlock()
-
-	return c.doGetFsNode(path)
-}
-
-func (c *FsCache) doGetFsNode(path util.FullPath) fs.Node {
-	t := c.root
-	for _, p := range path.Split() {
-		t = t.findChild(p)
-		if t == nil {
-			return nil
-		}
-	}
-	return t.node
-}
-
-func (c *FsCache) SetFsNode(path util.FullPath, node fs.Node) {
-
-	c.Lock()
-	defer c.Unlock()
-
-	c.doSetFsNode(path, node)
-}
-
-func (c *FsCache) doSetFsNode(path util.FullPath, node fs.Node) {
-	t := c.root
-	for _, p := range path.Split() {
-		t = t.ensureChild(p)
-	}
-	t.node = node
-}
-
-func (c *FsCache) EnsureFsNode(path util.FullPath, genNodeFn func() fs.Node) fs.Node {
-
-	c.Lock()
-	defer c.Unlock()
-
-	t := c.doGetFsNode(path)
-	if t != nil {
-		return t
-	}
-	t = genNodeFn()
-	c.doSetFsNode(path, t)
-	return t
-}
-
-func (c *FsCache) DeleteFsNode(path util.FullPath) {
-
-	c.Lock()
-	defer c.Unlock()
-
-	t := c.root
-	for _, p := range path.Split() {
-		t = t.findChild(p)
-		if t == nil {
-			return
-		}
-	}
-	if t.parent != nil {
-		t.parent.disconnectChild(t)
-	}
-	t.deleteSelf()
-}
-
-// oldPath and newPath are full path including the new name
-func (c *FsCache) Move(oldPath util.FullPath, newPath util.FullPath) *FsNode {
-
-	c.Lock()
-	defer c.Unlock()
-
-	// find old node
-	src := c.root
-	for _, p := range oldPath.Split() {
-		src = src.findChild(p)
-		if src == nil {
-			return src
-		}
-	}
-	if src.parent != nil {
-		src.parent.disconnectChild(src)
-	}
-
-	// find new node
-	target := c.root
-	for _, p := range newPath.Split() {
-		target = target.ensureChild(p)
-	}
-	parent := target.parent
-	src.name = target.name
-	if dir, ok := src.node.(*Dir); ok {
-		dir.name = target.name // target is not Dir, but a shortcut
-	}
-	if f, ok := src.node.(*File); ok {
-		f.Name = target.name
-		if f.entry != nil {
-			f.entry.Name = f.Name
-		}
-	}
-	parent.disconnectChild(target)
-
-	target.deleteSelf()
-
-	src.connectToParent(parent)
-
-	return src
-}
-
-func (n *FsNode) connectToParent(parent *FsNode) {
-	n.parent = parent
-	oldNode := parent.findChild(n.name)
-	if oldNode != nil {
-		oldNode.deleteSelf()
-	}
-	if dir, ok := n.node.(*Dir); ok {
-		dir.parent = parent.node.(*Dir)
-	}
-	if f, ok := n.node.(*File); ok {
-		f.dir = parent.node.(*Dir)
-	}
-	n.childrenLock.Lock()
-	parent.children[n.name] = n
-	n.childrenLock.Unlock()
-}
-
-func (n *FsNode) findChild(name string) *FsNode {
-	n.childrenLock.RLock()
-	defer n.childrenLock.RUnlock()
-
-	child, found := n.children[name]
-	if found {
-		return child
-	}
-	return nil
-}
-
-func (n *FsNode) ensureChild(name string) *FsNode {
-	n.childrenLock.Lock()
-	defer n.childrenLock.Unlock()
-
-	if n.children == nil {
-		n.children = make(map[string]*FsNode)
-	}
-	child, found := n.children[name]
-	if found {
-		return child
-	}
-	t := &FsNode{
-		parent:   n,
-		node:     nil,
-		name:     name,
-		children: nil,
-	}
-	n.children[name] = t
-	return t
-}
-
-func (n *FsNode) disconnectChild(child *FsNode) {
-	n.childrenLock.Lock()
-	delete(n.children, child.name)
-	n.childrenLock.Unlock()
-	child.parent = nil
-}
-
-func (n *FsNode) deleteSelf() {
-	n.childrenLock.Lock()
-	for _, child := range n.children {
-		child.deleteSelf()
-	}
-	n.children = nil
-	n.childrenLock.Unlock()
-
-	n.node = nil
-	n.parent = nil
-
-}

weed/filesys/fscache_test.go

@@ -1,96 +0,0 @@
-package filesys
-
-import (
-	"testing"
-
-	"github.com/chrislusf/seaweedfs/weed/util"
-)
-
-func TestPathSplit(t *testing.T) {
-	parts := util.FullPath("/").Split()
-	if len(parts) != 0 {
-		t.Errorf("expecting an empty list, but getting %d", len(parts))
-	}
-
-	parts = util.FullPath("/readme.md").Split()
-	if len(parts) != 1 {
-		t.Errorf("expecting an empty list, but getting %d", len(parts))
-	}
-
-}
-
-func TestFsCache(t *testing.T) {
-
-	cache := newFsCache(nil)
-
-	x := cache.GetFsNode(util.FullPath("/y/x"))
-	if x != nil {
-		t.Errorf("wrong node!")
-	}
-
-	p := util.FullPath("/a/b/c")
-	cache.SetFsNode(p, &File{Name: "cc"})
-	tNode := cache.GetFsNode(p)
-	tFile := tNode.(*File)
-	if tFile.Name != "cc" {
-		t.Errorf("expecting a FsNode")
-	}
-
-	cache.SetFsNode(util.FullPath("/a/b/d"), &File{Name: "dd"})
-	cache.SetFsNode(util.FullPath("/a/b/e"), &File{Name: "ee"})
-	cache.SetFsNode(util.FullPath("/a/b/f"), &File{Name: "ff"})
-	cache.SetFsNode(util.FullPath("/z"), &File{Name: "zz"})
-	cache.SetFsNode(util.FullPath("/a"), &File{Name: "aa"})
-
-	b := cache.GetFsNode(util.FullPath("/a/b"))
-	if b != nil {
-		t.Errorf("unexpected node!")
-	}
-
-	a := cache.GetFsNode(util.FullPath("/a"))
-	if a == nil {
-		t.Errorf("missing node!")
-	}
-
-	cache.DeleteFsNode(util.FullPath("/a"))
-	if b != nil {
-		t.Errorf("unexpected node!")
-	}
-
-	a = cache.GetFsNode(util.FullPath("/a"))
-	if a != nil {
-		t.Errorf("wrong DeleteFsNode!")
-	}
-
-	z := cache.GetFsNode(util.FullPath("/z"))
-	if z == nil {
-		t.Errorf("missing node!")
-	}
-
-	y := cache.GetFsNode(util.FullPath("/x/y"))
-	if y != nil {
-		t.Errorf("wrong node!")
-	}
-
-}
-
-func TestFsCacheMove(t *testing.T) {
-
-	cache := newFsCache(nil)
-
-	cache.SetFsNode(util.FullPath("/a/b/d"), &File{Name: "dd"})
-	cache.SetFsNode(util.FullPath("/a/b/e"), &File{Name: "ee"})
-	cache.SetFsNode(util.FullPath("/z"), &File{Name: "zz"})
-	cache.SetFsNode(util.FullPath("/a"), &File{Name: "aa"})
-
-	cache.Move(util.FullPath("/a/b"), util.FullPath("/z/x"))
-
-	d := cache.GetFsNode(util.FullPath("/z/x/d"))
-	if d == nil {
-		t.Errorf("unexpected nil node!")
-	}
-	if d.(*File).Name != "dd" {
-		t.Errorf("unexpected non dd node!")
-	}
-
-}

weed/filesys/wfs.go

@@ -10,18 +10,19 @@ import (
 	"sync"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/util/grace"
-	"github.com/karlseguin/ccache"
 	"google.golang.org/grpc"
 
+	"github.com/chrislusf/seaweedfs/weed/util/grace"
+
+	"github.com/seaweedfs/fuse"
+	"github.com/seaweedfs/fuse/fs"
+
 	"github.com/chrislusf/seaweedfs/weed/filesys/meta_cache"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/util/chunk_cache"
-	"github.com/seaweedfs/fuse"
-	"github.com/seaweedfs/fuse/fs"
 )
 
 type Option struct {
@@ -47,7 +48,6 @@ type Option struct {
 
 	OutsideContainerClusterMode bool // whether the mount runs outside SeaweedFS containers
 	Cipher                      bool // whether encrypt data on volume server
-	AsyncMetaDataCaching        bool // whether asynchronously cache meta data
 
 }
 
@@ -56,7 +56,6 @@ var _ = fs.FSStatfser(&WFS{})
 
 type WFS struct {
 	option                    *Option
-	listDirectoryEntriesCache *ccache.Cache
 
 	// contains all open handles, protected by handlesLock
 	handlesLock sync.Mutex
@@ -67,7 +66,6 @@ type WFS struct {
 	stats statsCache
 
 	root        fs.Node
-	fsNodeCache *FsCache
 
 	chunkCache *chunk_cache.ChunkCache
 	metaCache  *meta_cache.MetaCache
@@ -80,7 +78,6 @@ type statsCache struct {
 func NewSeaweedFileSystem(option *Option) *WFS {
 	wfs := &WFS{
 		option:                    option,
-		listDirectoryEntriesCache: ccache.New(ccache.Configure().MaxSize(option.DirListCacheLimit * 3).ItemsToPrune(100)),
 		handles:                   make(map[uint64]*FileHandle),
 		bufPool: sync.Pool{
 			New: func() interface{} {
@@ -95,21 +92,18 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 			wfs.chunkCache.Shutdown()
 		})
 	}
-	if wfs.option.AsyncMetaDataCaching {
-		wfs.metaCache = meta_cache.NewMetaCache(path.Join(option.CacheDir, "meta"))
-		startTime := time.Now()
-		if err := meta_cache.InitMetaCache(wfs.metaCache, wfs, wfs.option.FilerMountRootPath); err != nil {
-			glog.V(0).Infof("failed to init meta cache: %v", err)
-		} else {
-			go meta_cache.SubscribeMetaEvents(wfs.metaCache, wfs, wfs.option.FilerMountRootPath, startTime.UnixNano())
-			grace.OnInterrupt(func() {
-				wfs.metaCache.Shutdown()
-			})
-		}
+	wfs.metaCache = meta_cache.NewMetaCache(path.Join(option.CacheDir, "meta"))
+	startTime := time.Now()
+	if err := meta_cache.InitMetaCache(wfs.metaCache, wfs, wfs.option.FilerMountRootPath); err != nil {
+		glog.V(0).Infof("failed to init meta cache: %v", err)
+	} else {
+		go meta_cache.SubscribeMetaEvents(wfs.metaCache, wfs, wfs.option.FilerMountRootPath, startTime.UnixNano())
+		grace.OnInterrupt(func() {
+			wfs.metaCache.Shutdown()
+		})
 	}
 
 	wfs.root = &Dir{name: wfs.option.FilerMountRootPath, wfs: wfs}
-	wfs.fsNodeCache = newFsCache(wfs.root)
 
 	return wfs
 }
@@ -229,24 +223,6 @@ func (wfs *WFS) Statfs(ctx context.Context, req *fuse.StatfsRequest, resp *fuse.
 	return nil
 }
 
-func (wfs *WFS) cacheGet(path util.FullPath) *filer_pb.Entry {
-	item := wfs.listDirectoryEntriesCache.Get(string(path))
-	if item != nil && !item.Expired() {
-		return item.Value().(*filer_pb.Entry)
-	}
-	return nil
-}
-func (wfs *WFS) cacheSet(path util.FullPath, entry *filer_pb.Entry, ttl time.Duration) {
-	if entry == nil {
-		wfs.listDirectoryEntriesCache.Delete(string(path))
-	} else {
-		wfs.listDirectoryEntriesCache.Set(string(path), entry, ttl)
-	}
-}
-func (wfs *WFS) cacheDelete(path util.FullPath) {
-	wfs.listDirectoryEntriesCache.Delete(string(path))
-}
-
 func (wfs *WFS) AdjustedUrl(hostAndPort string) string {
 	if !wfs.option.OutsideContainerClusterMode {
 		return hostAndPort