diff --git a/weed/filer2/embedded/embedded_store.go b/weed/filer2/embedded/embedded_store.go
index a69190e32..f871f18e2 100644
--- a/weed/filer2/embedded/embedded_store.go
+++ b/weed/filer2/embedded/embedded_store.go
@@ -3,6 +3,7 @@ package embedded
 import (
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
 type EmbeddedStore struct {
@@ -25,7 +26,7 @@ func (filer *EmbeddedStore) AddDirectoryLink(directory *filer2.Entry, delta int3
 	return nil
 }
 
-func (filer *EmbeddedStore) AppendFileChunk(fullpath filer2.FullPath, fileChunk filer2.FileChunk) (err error) {
+func (filer *EmbeddedStore) AppendFileChunk(fullpath filer2.FullPath, fileChunks []*filer_pb.FileChunk) (err error) {
 	return nil
 }
 
diff --git a/weed/filer2/filechunks.go b/weed/filer2/filechunks.go
index b2f05de3a..9ddbe236e 100644
--- a/weed/filer2/filechunks.go
+++ b/weed/filer2/filechunks.go
@@ -1,6 +1,8 @@
 package filer2
 
-type Chunks []FileChunk
+import "github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+
+type Chunks []*filer_pb.FileChunk
 
 func (chunks Chunks) TotalSize() (size uint64) {
 	for _, c := range chunks {
diff --git a/weed/filer2/filer.go b/weed/filer2/filer.go
index 5f76d6fb0..4ee6f4e50 100644
--- a/weed/filer2/filer.go
+++ b/weed/filer2/filer.go
@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"time"
 	"os"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
 type Filer struct {
@@ -105,8 +106,8 @@ func (f *Filer) CreateEntry(entry *Entry) (error) {
 	return nil
 }
 
-func (f *Filer) AppendFileChunk(p FullPath, c FileChunk) (err error) {
-	return f.store.AppendFileChunk(p, c)
+func (f *Filer) AppendFileChunk(p FullPath, chunks []*filer_pb.FileChunk) (err error) {
+	return f.store.AppendFileChunk(p, chunks)
 }
 
 func (f *Filer) FindEntry(p FullPath) (found bool, entry *Entry, err error) {
diff --git a/weed/filer2/filer_structure.go b/weed/filer2/filer_structure.go
index b2c1f5902..1d2da752d 100644
--- a/weed/filer2/filer_structure.go
+++ b/weed/filer2/filer_structure.go
@@ -5,9 +5,9 @@ import (
 	"os"
 	"time"
 	"path/filepath"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
-type FileId string //file id in SeaweedFS
 type FullPath string
 
 func NewFullPath(dir, name string) FullPath {
@@ -51,18 +51,12 @@ type Entry struct {
 	Attr
 
 	// the following is for files
-	Chunks []FileChunk `json:"chunks,omitempty"`
-}
-
-type FileChunk struct {
-	Fid    FileId `json:"fid,omitempty"`
-	Offset int64  `json:"offset,omitempty"`
-	Size   uint64 `json:"size,omitempty"` // size in bytes
+	Chunks []*filer_pb.FileChunk `json:"chunks,omitempty"`
 }
 
 type AbstractFiler interface {
 	CreateEntry(*Entry) (error)
-	AppendFileChunk(FullPath, FileChunk) (err error)
+	AppendFileChunk(FullPath, []*filer_pb.FileChunk) (err error)
 	FindEntry(FullPath) (found bool, fileEntry *Entry, err error)
 	DeleteEntry(FullPath) (fileEntry *Entry, err error)
 
@@ -74,7 +68,7 @@ var ErrNotFound = errors.New("filer: no entry is found in filer store")
 
 type FilerStore interface {
 	InsertEntry(*Entry) (error)
-	AppendFileChunk(FullPath, FileChunk) (err error)
+	AppendFileChunk(FullPath, []*filer_pb.FileChunk) (err error)
 	FindEntry(FullPath) (found bool, entry *Entry, err error)
 	DeleteEntry(FullPath) (fileEntry *Entry, err error)
 
diff --git a/weed/filer2/memdb/memdb_store.go b/weed/filer2/memdb/memdb_store.go
index edddcca96..0276e9a7f 100644
--- a/weed/filer2/memdb/memdb_store.go
+++ b/weed/filer2/memdb/memdb_store.go
@@ -6,6 +6,7 @@ import (
 	"strings"
 	"fmt"
 	"time"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
 type MemDbStore struct {
@@ -32,13 +33,15 @@ func (filer *MemDbStore) InsertEntry(entry *filer2.Entry) (err error) {
 	return nil
 }
 
-func (filer *MemDbStore) AppendFileChunk(fullpath filer2.FullPath, fileChunk filer2.FileChunk) (err error) {
+func (filer *MemDbStore) AppendFileChunk(fullpath filer2.FullPath, fileChunks []*filer_pb.FileChunk) (err error) {
 	found, entry, err := filer.FindEntry(fullpath)
 	if !found {
 		return fmt.Errorf("No such file: %s", fullpath)
 	}
-	entry.Chunks = append(entry.Chunks, fileChunk)
+	entry.Chunks = append(entry.Chunks, fileChunks...)
 	entry.Mtime = time.Now()
+	println("appending to entry", entry.Name(), len(entry.Chunks))
+	filer.tree.ReplaceOrInsert(Entry{entry})
 	return nil
 }
 
diff --git a/weed/filesys/dir.go b/weed/filesys/dir.go
index d408dc1ac..f0191533d 100644
--- a/weed/filesys/dir.go
+++ b/weed/filesys/dir.go
@@ -9,7 +9,6 @@ import (
 
 	"bazil.org/fuse/fs"
 	"bazil.org/fuse"
-	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"time"
@@ -27,16 +26,77 @@ func (dir *Dir) Attr(context context.Context, attr *fuse.Attr) error {
 	return nil
 }
 
+func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
+	resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
+
+	err := dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		request := &filer_pb.CreateEntryRequest{
+			Directory: dir.Path,
+			Entry: &filer_pb.Entry{
+				Name:        req.Name,
+				IsDirectory: req.Mode&os.ModeDir > 0,
+				Attributes: &filer_pb.FuseAttributes{
+					Mtime:    time.Now().Unix(),
+					FileMode: uint32(req.Mode),
+					Uid:      req.Uid,
+					Gid:      req.Gid,
+				},
+			},
+		}
+
+		glog.V(1).Infof("create: %v", request)
+		if _, err := client.CreateEntry(ctx, request); err != nil {
+			return fmt.Errorf("create file: %v", err)
+		}
+
+		return nil
+	})
+
+	if err == nil {
+		node := &File{Name: req.Name, dir: dir, wfs: dir.wfs}
+		dir.NodeMap[req.Name] = node
+		return node, node, nil
+	}
+
+	return nil, nil, err
+}
+
 func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, error) {
 	dir.NodeMapLock.Lock()
 	defer dir.NodeMapLock.Unlock()
 
-	fmt.Printf("mkdir %+v\n", req)
+	err := dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
-	node := &Dir{Path: path.Join(dir.Path, req.Name), wfs: dir.wfs}
-	dir.NodeMap[req.Name] = node
+		request := &filer_pb.CreateEntryRequest{
+			Directory: dir.Path,
+			Entry: &filer_pb.Entry{
+				Name:        req.Name,
+				IsDirectory: true,
+				Attributes: &filer_pb.FuseAttributes{
+					Mtime:    time.Now().Unix(),
+					FileMode: uint32(req.Mode),
+					Uid:      req.Uid,
+					Gid:      req.Gid,
+				},
+			},
+		}
 
-	return node, nil
+		glog.V(1).Infof("mkdir: %v", request)
+		if _, err := client.CreateEntry(ctx, request); err != nil {
+			return fmt.Errorf("make dir: %v", err)
+		}
+
+		return nil
+	})
+
+	if err == nil {
+		node := &Dir{Path: path.Join(dir.Path, req.Name), wfs: dir.wfs}
+		dir.NodeMap[req.Name] = node
+		return node, nil
+	}
+
+	return nil, err
 }
 
 func (dir *Dir) Lookup(ctx context.Context, name string) (node fs.Node, err error) {
@@ -75,13 +135,13 @@ func (dir *Dir) Lookup(ctx context.Context, name string) (node fs.Node, err erro
 		if entry.IsDirectory {
 			node = &Dir{Path: path.Join(dir.Path, name), wfs: dir.wfs}
 		} else {
-			node = &File{FileId: filer.FileId(entry.FileId), Name: name, dir: dir, wfs: dir.wfs}
+			node = &File{Chunks: entry.Chunks, Name: name, dir: dir, wfs: dir.wfs}
 		}
 		dir.NodeMap[name] = node
 		return node, nil
 	}
 
-	return nil, err
+	return nil, fuse.ENOENT
 }
 
 func (dir *Dir) ReadDirAll(ctx context.Context) (ret []fuse.Dirent, err error) {
diff --git a/weed/filesys/file.go b/weed/filesys/file.go
index b4a447fa6..160693c54 100644
--- a/weed/filesys/file.go
+++ b/weed/filesys/file.go
@@ -5,13 +5,14 @@ import (
 	"fmt"
 
 	"bazil.org/fuse"
-	"github.com/chrislusf/seaweedfs/weed/filer"
 	"bazil.org/fuse/fs"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"path/filepath"
 	"os"
 	"time"
+	"bytes"
+	"github.com/chrislusf/seaweedfs/weed/operation"
 )
 
 var _ = fs.Node(&File{})
@@ -20,10 +21,11 @@ var _ = fs.Node(&File{})
 var _ = fs.Handle(&File{})
 var _ = fs.HandleReadAller(&File{})
 // var _ = fs.HandleReader(&File{})
+var _ = fs.HandleFlusher(&File{})
 var _ = fs.HandleWriter(&File{})
 
 type File struct {
-	FileId filer.FileId
+	Chunks []*filer_pb.FileChunk
 	Name   string
 	dir    *Dir
 	wfs    *WFS
@@ -71,10 +73,15 @@ func (file *File) Attr(context context.Context, attr *fuse.Attr) error {
 
 func (file *File) ReadAll(ctx context.Context) (content []byte, err error) {
 
+	if len(file.Chunks) == 0 {
+		return
+	}
+
 	err = file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
+		// FIXME: need to either use Read() or implement differently
 		request := &filer_pb.GetFileContentRequest{
-			FileId: string(file.FileId),
+			FileId: file.Chunks[0].FileId,
 		}
 
 		glog.V(1).Infof("read file content: %v", request)
@@ -91,7 +98,75 @@ func (file *File) ReadAll(ctx context.Context) (content []byte, err error) {
 	return content, err
 }
 
+func (file *File) Flush(ctx context.Context, req *fuse.FlushRequest) error {
+	// write the file chunks to the filer
+	fmt.Printf("flush file %+v\n", req)
+
+	err := file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		request := &filer_pb.AppendFileChunksRequest{
+			Directory: file.dir.Path,
+			Entry: &filer_pb.Entry{
+				Name:   file.Name,
+				Chunks: file.Chunks,
+			},
+		}
+
+		glog.V(1).Infof("append chunks: %v", request)
+		if _, err := client.AppendFileChunks(ctx, request); err != nil {
+			return fmt.Errorf("create file: %v", err)
+		}
+
+		return nil
+	})
+
+	return err
+}
+
 func (file *File) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
+	// write the request to volume servers
 	fmt.Printf("write file %+v\n", req)
+
+	var fileId, host string
+
+	if err := file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		request := &filer_pb.AssignVolumeRequest{
+			Count:       1,
+			Replication: "000",
+			Collection:  "",
+		}
+
+		glog.V(1).Infof("assign volume: %v", request)
+		resp, err := client.AssignVolume(ctx, request)
+		if err != nil {
+			return err
+		}
+
+		fileId, host = resp.FileId, resp.Url
+
+		return nil
+	}); err != nil {
+		return fmt.Errorf("filer assign volume: %v", err)
+	}
+
+	fileUrl := fmt.Sprintf("http://%s/%s", host, fileId)
+	bufReader := bytes.NewReader(req.Data)
+	uploadResult, err := operation.Upload(fileUrl, file.Name, bufReader, false, "application/octet-stream", nil, "")
+	if err != nil {
+		return fmt.Errorf("upload data: %v", err)
+	}
+	if uploadResult.Error != "" {
+		return fmt.Errorf("upload result: %v", uploadResult.Error)
+	}
+
+	glog.V(1).Infof("uploaded %s/%s to: %v", file.dir.Path, file.Name, fileUrl)
+
+	file.Chunks = append(file.Chunks, &filer_pb.FileChunk{
+		FileId: fileId,
+		Offset: req.Offset,
+		Size:   uint64(uploadResult.Size),
+	})
+
 	return nil
 }
diff --git a/weed/operation/assign_file_id.go b/weed/operation/assign_file_id.go
index f2365890c..a3466bdd2 100644
--- a/weed/operation/assign_file_id.go
+++ b/weed/operation/assign_file_id.go
@@ -52,7 +52,7 @@ func Assign(server string, r *VolumeAssignRequest) (*AssignResult, error) {
 	}
 
 	jsonBlob, err := util.Post("http://"+server+"/dir/assign", values)
-	glog.V(2).Info("assign result :", string(jsonBlob))
+	glog.V(2).Infof("assign result from %s : %s", server, string(jsonBlob))
 	if err != nil {
 		return nil, err
 	}
diff --git a/weed/pb/filer.proto b/weed/pb/filer.proto
index 822bf143e..74b7efcd0 100644
--- a/weed/pb/filer.proto
+++ b/weed/pb/filer.proto
@@ -18,9 +18,18 @@ service SeaweedFiler {
     rpc GetFileContent (GetFileContentRequest) returns (GetFileContentResponse) {
     }
 
+    rpc CreateEntry (CreateEntryRequest) returns (CreateEntryResponse) {
+    }
+
+    rpc AppendFileChunks (AppendFileChunksRequest) returns (AppendFileChunksResponse) {
+    }
+
     rpc DeleteEntry (DeleteEntryRequest) returns (DeleteEntryResponse) {
     }
 
+    rpc AssignVolume (AssignVolumeRequest) returns (AssignVolumeResponse) {
+    }
+
 }
 
 //////////////////////////////////////////////////
@@ -45,10 +54,16 @@ message ListEntriesResponse {
 message Entry {
     string name = 1;
     bool is_directory = 2;
-    string file_id = 3;
+    repeated FileChunk chunks = 3;
     FuseAttributes attributes = 4;
 }
 
+message FileChunk {
+    string file_id = 1;
+    int64 offset = 2;
+    uint64 size = 3;
+}
+
 message FuseAttributes {
     uint64 file_size = 1;
     int64 mtime = 2;
@@ -75,6 +90,14 @@ message GetFileContentResponse {
     bytes content = 1;
 }
 
+message CreateEntryRequest {
+    string directory = 1;
+    Entry entry = 2;
+}
+
+message CreateEntryResponse {
+}
+
 message DeleteEntryRequest {
     string directory = 1;
     string name = 2;
@@ -83,3 +106,23 @@ message DeleteEntryRequest {
 
 message DeleteEntryResponse {
 }
+
+message AssignVolumeRequest {
+    int32 count = 1;
+    string collection = 2;
+    string replication = 3;
+}
+
+message AssignVolumeResponse {
+    string file_id = 1;
+    string url = 2;
+    string public_url = 3;
+    int32 count = 4;
+}
+
+message AppendFileChunksRequest {
+    string directory = 1;
+    Entry entry = 2;
+}
+message AppendFileChunksResponse {
+}
diff --git a/weed/pb/filer_pb/filer.pb.go b/weed/pb/filer_pb/filer.pb.go
index 98d2c32b6..369fa0826 100644
--- a/weed/pb/filer_pb/filer.pb.go
+++ b/weed/pb/filer_pb/filer.pb.go
@@ -14,13 +14,20 @@ It has these top-level messages:
 	ListEntriesRequest
 	ListEntriesResponse
 	Entry
+	FileChunk
 	FuseAttributes
 	GetFileAttributesRequest
 	GetFileAttributesResponse
 	GetFileContentRequest
 	GetFileContentResponse
+	CreateEntryRequest
+	CreateEntryResponse
 	DeleteEntryRequest
 	DeleteEntryResponse
+	AssignVolumeRequest
+	AssignVolumeResponse
+	AppendFileChunksRequest
+	AppendFileChunksResponse
 */
 package filer_pb
 
@@ -119,7 +126,7 @@ func (m *ListEntriesResponse) GetEntries() []*Entry {
 type Entry struct {
 	Name        string          `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
 	IsDirectory bool            `protobuf:"varint,2,opt,name=is_directory,json=isDirectory" json:"is_directory,omitempty"`
-	FileId      string          `protobuf:"bytes,3,opt,name=file_id,json=fileId" json:"file_id,omitempty"`
+	Chunks      []*FileChunk    `protobuf:"bytes,3,rep,name=chunks" json:"chunks,omitempty"`
 	Attributes  *FuseAttributes `protobuf:"bytes,4,opt,name=attributes" json:"attributes,omitempty"`
 }
 
@@ -142,11 +149,11 @@ func (m *Entry) GetIsDirectory() bool {
 	return false
 }
 
-func (m *Entry) GetFileId() string {
+func (m *Entry) GetChunks() []*FileChunk {
 	if m != nil {
-		return m.FileId
+		return m.Chunks
 	}
-	return ""
+	return nil
 }
 
 func (m *Entry) GetAttributes() *FuseAttributes {
@@ -156,6 +163,38 @@ func (m *Entry) GetAttributes() *FuseAttributes {
 	return nil
 }
 
+type FileChunk struct {
+	FileId string `protobuf:"bytes,1,opt,name=file_id,json=fileId" json:"file_id,omitempty"`
+	Offset int64  `protobuf:"varint,2,opt,name=offset" json:"offset,omitempty"`
+	Size   uint64 `protobuf:"varint,3,opt,name=size" json:"size,omitempty"`
+}
+
+func (m *FileChunk) Reset()                    { *m = FileChunk{} }
+func (m *FileChunk) String() string            { return proto.CompactTextString(m) }
+func (*FileChunk) ProtoMessage()               {}
+func (*FileChunk) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *FileChunk) GetFileId() string {
+	if m != nil {
+		return m.FileId
+	}
+	return ""
+}
+
+func (m *FileChunk) GetOffset() int64 {
+	if m != nil {
+		return m.Offset
+	}
+	return 0
+}
+
+func (m *FileChunk) GetSize() uint64 {
+	if m != nil {
+		return m.Size
+	}
+	return 0
+}
+
 type FuseAttributes struct {
 	FileSize uint64 `protobuf:"varint,1,opt,name=file_size,json=fileSize" json:"file_size,omitempty"`
 	Mtime    int64  `protobuf:"varint,2,opt,name=mtime" json:"mtime,omitempty"`
@@ -167,7 +206,7 @@ type FuseAttributes struct {
 func (m *FuseAttributes) Reset()                    { *m = FuseAttributes{} }
 func (m *FuseAttributes) String() string            { return proto.CompactTextString(m) }
 func (*FuseAttributes) ProtoMessage()               {}
-func (*FuseAttributes) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+func (*FuseAttributes) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
 
 func (m *FuseAttributes) GetFileSize() uint64 {
 	if m != nil {
@@ -213,7 +252,7 @@ type GetFileAttributesRequest struct {
 func (m *GetFileAttributesRequest) Reset()                    { *m = GetFileAttributesRequest{} }
 func (m *GetFileAttributesRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetFileAttributesRequest) ProtoMessage()               {}
-func (*GetFileAttributesRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+func (*GetFileAttributesRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
 
 func (m *GetFileAttributesRequest) GetName() string {
 	if m != nil {
@@ -243,7 +282,7 @@ type GetFileAttributesResponse struct {
 func (m *GetFileAttributesResponse) Reset()                    { *m = GetFileAttributesResponse{} }
 func (m *GetFileAttributesResponse) String() string            { return proto.CompactTextString(m) }
 func (*GetFileAttributesResponse) ProtoMessage()               {}
-func (*GetFileAttributesResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+func (*GetFileAttributesResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
 
 func (m *GetFileAttributesResponse) GetAttributes() *FuseAttributes {
 	if m != nil {
@@ -259,7 +298,7 @@ type GetFileContentRequest struct {
 func (m *GetFileContentRequest) Reset()                    { *m = GetFileContentRequest{} }
 func (m *GetFileContentRequest) String() string            { return proto.CompactTextString(m) }
 func (*GetFileContentRequest) ProtoMessage()               {}
-func (*GetFileContentRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+func (*GetFileContentRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
 
 func (m *GetFileContentRequest) GetFileId() string {
 	if m != nil {
@@ -275,7 +314,7 @@ type GetFileContentResponse struct {
 func (m *GetFileContentResponse) Reset()                    { *m = GetFileContentResponse{} }
 func (m *GetFileContentResponse) String() string            { return proto.CompactTextString(m) }
 func (*GetFileContentResponse) ProtoMessage()               {}
-func (*GetFileContentResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+func (*GetFileContentResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
 
 func (m *GetFileContentResponse) GetContent() []byte {
 	if m != nil {
@@ -284,6 +323,38 @@ func (m *GetFileContentResponse) GetContent() []byte {
 	return nil
 }
 
+type CreateEntryRequest struct {
+	Directory string `protobuf:"bytes,1,opt,name=directory" json:"directory,omitempty"`
+	Entry     *Entry `protobuf:"bytes,2,opt,name=entry" json:"entry,omitempty"`
+}
+
+func (m *CreateEntryRequest) Reset()                    { *m = CreateEntryRequest{} }
+func (m *CreateEntryRequest) String() string            { return proto.CompactTextString(m) }
+func (*CreateEntryRequest) ProtoMessage()               {}
+func (*CreateEntryRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
+
+func (m *CreateEntryRequest) GetDirectory() string {
+	if m != nil {
+		return m.Directory
+	}
+	return ""
+}
+
+func (m *CreateEntryRequest) GetEntry() *Entry {
+	if m != nil {
+		return m.Entry
+	}
+	return nil
+}
+
+type CreateEntryResponse struct {
+}
+
+func (m *CreateEntryResponse) Reset()                    { *m = CreateEntryResponse{} }
+func (m *CreateEntryResponse) String() string            { return proto.CompactTextString(m) }
+func (*CreateEntryResponse) ProtoMessage()               {}
+func (*CreateEntryResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} }
+
 type DeleteEntryRequest struct {
 	Directory   string `protobuf:"bytes,1,opt,name=directory" json:"directory,omitempty"`
 	Name        string `protobuf:"bytes,2,opt,name=name" json:"name,omitempty"`
@@ -293,7 +364,7 @@ type DeleteEntryRequest struct {
 func (m *DeleteEntryRequest) Reset()                    { *m = DeleteEntryRequest{} }
 func (m *DeleteEntryRequest) String() string            { return proto.CompactTextString(m) }
 func (*DeleteEntryRequest) ProtoMessage()               {}
-func (*DeleteEntryRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
+func (*DeleteEntryRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13} }
 
 func (m *DeleteEntryRequest) GetDirectory() string {
 	if m != nil {
@@ -322,7 +393,111 @@ type DeleteEntryResponse struct {
 func (m *DeleteEntryResponse) Reset()                    { *m = DeleteEntryResponse{} }
 func (m *DeleteEntryResponse) String() string            { return proto.CompactTextString(m) }
 func (*DeleteEntryResponse) ProtoMessage()               {}
-func (*DeleteEntryResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
+func (*DeleteEntryResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{14} }
+
+type AssignVolumeRequest struct {
+	Count       int32  `protobuf:"varint,1,opt,name=count" json:"count,omitempty"`
+	Collection  string `protobuf:"bytes,2,opt,name=collection" json:"collection,omitempty"`
+	Replication string `protobuf:"bytes,3,opt,name=replication" json:"replication,omitempty"`
+}
+
+func (m *AssignVolumeRequest) Reset()                    { *m = AssignVolumeRequest{} }
+func (m *AssignVolumeRequest) String() string            { return proto.CompactTextString(m) }
+func (*AssignVolumeRequest) ProtoMessage()               {}
+func (*AssignVolumeRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{15} }
+
+func (m *AssignVolumeRequest) GetCount() int32 {
+	if m != nil {
+		return m.Count
+	}
+	return 0
+}
+
+func (m *AssignVolumeRequest) GetCollection() string {
+	if m != nil {
+		return m.Collection
+	}
+	return ""
+}
+
+func (m *AssignVolumeRequest) GetReplication() string {
+	if m != nil {
+		return m.Replication
+	}
+	return ""
+}
+
+type AssignVolumeResponse struct {
+	FileId    string `protobuf:"bytes,1,opt,name=file_id,json=fileId" json:"file_id,omitempty"`
+	Url       string `protobuf:"bytes,2,opt,name=url" json:"url,omitempty"`
+	PublicUrl string `protobuf:"bytes,3,opt,name=public_url,json=publicUrl" json:"public_url,omitempty"`
+	Count     int32  `protobuf:"varint,4,opt,name=count" json:"count,omitempty"`
+}
+
+func (m *AssignVolumeResponse) Reset()                    { *m = AssignVolumeResponse{} }
+func (m *AssignVolumeResponse) String() string            { return proto.CompactTextString(m) }
+func (*AssignVolumeResponse) ProtoMessage()               {}
+func (*AssignVolumeResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{16} }
+
+func (m *AssignVolumeResponse) GetFileId() string {
+	if m != nil {
+		return m.FileId
+	}
+	return ""
+}
+
+func (m *AssignVolumeResponse) GetUrl() string {
+	if m != nil {
+		return m.Url
+	}
+	return ""
+}
+
+func (m *AssignVolumeResponse) GetPublicUrl() string {
+	if m != nil {
+		return m.PublicUrl
+	}
+	return ""
+}
+
+func (m *AssignVolumeResponse) GetCount() int32 {
+	if m != nil {
+		return m.Count
+	}
+	return 0
+}
+
+type AppendFileChunksRequest struct {
+	Directory string `protobuf:"bytes,1,opt,name=directory" json:"directory,omitempty"`
+	Entry     *Entry `protobuf:"bytes,2,opt,name=entry" json:"entry,omitempty"`
+}
+
+func (m *AppendFileChunksRequest) Reset()                    { *m = AppendFileChunksRequest{} }
+func (m *AppendFileChunksRequest) String() string            { return proto.CompactTextString(m) }
+func (*AppendFileChunksRequest) ProtoMessage()               {}
+func (*AppendFileChunksRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{17} }
+
+func (m *AppendFileChunksRequest) GetDirectory() string {
+	if m != nil {
+		return m.Directory
+	}
+	return ""
+}
+
+func (m *AppendFileChunksRequest) GetEntry() *Entry {
+	if m != nil {
+		return m.Entry
+	}
+	return nil
+}
+
+type AppendFileChunksResponse struct {
+}
+
+func (m *AppendFileChunksResponse) Reset()                    { *m = AppendFileChunksResponse{} }
+func (m *AppendFileChunksResponse) String() string            { return proto.CompactTextString(m) }
+func (*AppendFileChunksResponse) ProtoMessage()               {}
+func (*AppendFileChunksResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
 
 func init() {
 	proto.RegisterType((*LookupDirectoryEntryRequest)(nil), "filer_pb.LookupDirectoryEntryRequest")
@@ -330,13 +505,20 @@ func init() {
 	proto.RegisterType((*ListEntriesRequest)(nil), "filer_pb.ListEntriesRequest")
 	proto.RegisterType((*ListEntriesResponse)(nil), "filer_pb.ListEntriesResponse")
 	proto.RegisterType((*Entry)(nil), "filer_pb.Entry")
+	proto.RegisterType((*FileChunk)(nil), "filer_pb.FileChunk")
 	proto.RegisterType((*FuseAttributes)(nil), "filer_pb.FuseAttributes")
 	proto.RegisterType((*GetFileAttributesRequest)(nil), "filer_pb.GetFileAttributesRequest")
 	proto.RegisterType((*GetFileAttributesResponse)(nil), "filer_pb.GetFileAttributesResponse")
 	proto.RegisterType((*GetFileContentRequest)(nil), "filer_pb.GetFileContentRequest")
 	proto.RegisterType((*GetFileContentResponse)(nil), "filer_pb.GetFileContentResponse")
+	proto.RegisterType((*CreateEntryRequest)(nil), "filer_pb.CreateEntryRequest")
+	proto.RegisterType((*CreateEntryResponse)(nil), "filer_pb.CreateEntryResponse")
 	proto.RegisterType((*DeleteEntryRequest)(nil), "filer_pb.DeleteEntryRequest")
 	proto.RegisterType((*DeleteEntryResponse)(nil), "filer_pb.DeleteEntryResponse")
+	proto.RegisterType((*AssignVolumeRequest)(nil), "filer_pb.AssignVolumeRequest")
+	proto.RegisterType((*AssignVolumeResponse)(nil), "filer_pb.AssignVolumeResponse")
+	proto.RegisterType((*AppendFileChunksRequest)(nil), "filer_pb.AppendFileChunksRequest")
+	proto.RegisterType((*AppendFileChunksResponse)(nil), "filer_pb.AppendFileChunksResponse")
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -354,7 +536,10 @@ type SeaweedFilerClient interface {
 	ListEntries(ctx context.Context, in *ListEntriesRequest, opts ...grpc.CallOption) (*ListEntriesResponse, error)
 	GetFileAttributes(ctx context.Context, in *GetFileAttributesRequest, opts ...grpc.CallOption) (*GetFileAttributesResponse, error)
 	GetFileContent(ctx context.Context, in *GetFileContentRequest, opts ...grpc.CallOption) (*GetFileContentResponse, error)
+	CreateEntry(ctx context.Context, in *CreateEntryRequest, opts ...grpc.CallOption) (*CreateEntryResponse, error)
+	AppendFileChunks(ctx context.Context, in *AppendFileChunksRequest, opts ...grpc.CallOption) (*AppendFileChunksResponse, error)
 	DeleteEntry(ctx context.Context, in *DeleteEntryRequest, opts ...grpc.CallOption) (*DeleteEntryResponse, error)
+	AssignVolume(ctx context.Context, in *AssignVolumeRequest, opts ...grpc.CallOption) (*AssignVolumeResponse, error)
 }
 
 type seaweedFilerClient struct {
@@ -401,6 +586,24 @@ func (c *seaweedFilerClient) GetFileContent(ctx context.Context, in *GetFileCont
 	return out, nil
 }
 
+func (c *seaweedFilerClient) CreateEntry(ctx context.Context, in *CreateEntryRequest, opts ...grpc.CallOption) (*CreateEntryResponse, error) {
+	out := new(CreateEntryResponse)
+	err := grpc.Invoke(ctx, "/filer_pb.SeaweedFiler/CreateEntry", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *seaweedFilerClient) AppendFileChunks(ctx context.Context, in *AppendFileChunksRequest, opts ...grpc.CallOption) (*AppendFileChunksResponse, error) {
+	out := new(AppendFileChunksResponse)
+	err := grpc.Invoke(ctx, "/filer_pb.SeaweedFiler/AppendFileChunks", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *seaweedFilerClient) DeleteEntry(ctx context.Context, in *DeleteEntryRequest, opts ...grpc.CallOption) (*DeleteEntryResponse, error) {
 	out := new(DeleteEntryResponse)
 	err := grpc.Invoke(ctx, "/filer_pb.SeaweedFiler/DeleteEntry", in, out, c.cc, opts...)
@@ -410,6 +613,15 @@ func (c *seaweedFilerClient) DeleteEntry(ctx context.Context, in *DeleteEntryReq
 	return out, nil
 }
 
+func (c *seaweedFilerClient) AssignVolume(ctx context.Context, in *AssignVolumeRequest, opts ...grpc.CallOption) (*AssignVolumeResponse, error) {
+	out := new(AssignVolumeResponse)
+	err := grpc.Invoke(ctx, "/filer_pb.SeaweedFiler/AssignVolume", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for SeaweedFiler service
 
 type SeaweedFilerServer interface {
@@ -417,7 +629,10 @@ type SeaweedFilerServer interface {
 	ListEntries(context.Context, *ListEntriesRequest) (*ListEntriesResponse, error)
 	GetFileAttributes(context.Context, *GetFileAttributesRequest) (*GetFileAttributesResponse, error)
 	GetFileContent(context.Context, *GetFileContentRequest) (*GetFileContentResponse, error)
+	CreateEntry(context.Context, *CreateEntryRequest) (*CreateEntryResponse, error)
+	AppendFileChunks(context.Context, *AppendFileChunksRequest) (*AppendFileChunksResponse, error)
 	DeleteEntry(context.Context, *DeleteEntryRequest) (*DeleteEntryResponse, error)
+	AssignVolume(context.Context, *AssignVolumeRequest) (*AssignVolumeResponse, error)
 }
 
 func RegisterSeaweedFilerServer(s *grpc.Server, srv SeaweedFilerServer) {
@@ -496,6 +711,42 @@ func _SeaweedFiler_GetFileContent_Handler(srv interface{}, ctx context.Context,
 	return interceptor(ctx, in, info, handler)
 }
 
+func _SeaweedFiler_CreateEntry_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CreateEntryRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedFilerServer).CreateEntry(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/filer_pb.SeaweedFiler/CreateEntry",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedFilerServer).CreateEntry(ctx, req.(*CreateEntryRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _SeaweedFiler_AppendFileChunks_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(AppendFileChunksRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedFilerServer).AppendFileChunks(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/filer_pb.SeaweedFiler/AppendFileChunks",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedFilerServer).AppendFileChunks(ctx, req.(*AppendFileChunksRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _SeaweedFiler_DeleteEntry_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(DeleteEntryRequest)
 	if err := dec(in); err != nil {
@@ -514,6 +765,24 @@ func _SeaweedFiler_DeleteEntry_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }
 
+func _SeaweedFiler_AssignVolume_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(AssignVolumeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedFilerServer).AssignVolume(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/filer_pb.SeaweedFiler/AssignVolume",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedFilerServer).AssignVolume(ctx, req.(*AssignVolumeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _SeaweedFiler_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "filer_pb.SeaweedFiler",
 	HandlerType: (*SeaweedFilerServer)(nil),
@@ -534,10 +803,22 @@ var _SeaweedFiler_serviceDesc = grpc.ServiceDesc{
 			MethodName: "GetFileContent",
 			Handler:    _SeaweedFiler_GetFileContent_Handler,
 		},
+		{
+			MethodName: "CreateEntry",
+			Handler:    _SeaweedFiler_CreateEntry_Handler,
+		},
+		{
+			MethodName: "AppendFileChunks",
+			Handler:    _SeaweedFiler_AppendFileChunks_Handler,
+		},
 		{
 			MethodName: "DeleteEntry",
 			Handler:    _SeaweedFiler_DeleteEntry_Handler,
 		},
+		{
+			MethodName: "AssignVolume",
+			Handler:    _SeaweedFiler_AssignVolume_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "filer.proto",
@@ -546,39 +827,53 @@ var _SeaweedFiler_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("filer.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	// 762 bytes of a gzipped FileDescriptorProto
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+	0x62, 0xe3, 0x84, 0x63, 0x6c, 0xd5, 0x64, 0x3f, 0x2c, 0xcd, 0x21, 0x89, 0xf1, 0x2c, 0xd3, 0xdb,
+	0x9a, 0x2d, 0x7d, 0x05, 0xcd, 0x2c, 0x1c, 0xd9, 0x85, 0x35, 0xe1, 0x33, 0x64, 0xae, 0x42, 0xdb,
+	0x10, 0xd7, 0x17, 0x2e, 0xd9, 0x81, 0x46, 0x30, 0x99, 0xc4, 0xc8, 0x25, 0x52, 0xd3, 0x56, 0x37,
+	0x51, 0x5b, 0xcc, 0x1e, 0xd1, 0x32, 0xfb, 0xc6, 0x49, 0xcd, 0x96, 0x67, 0xfa, 0xc9, 0x80, 0xcd,
+	0x62, 0x42, 0xb2, 0x07, 0x4d, 0x19, 0x57, 0xda, 0x1a, 0xd2, 0x56, 0xee, 0xcd, 0x0d, 0x7b, 0x44,
+	0xd2, 0x85, 0xfa, 0x8c, 0x33, 0x35, 0x7b, 0xd3, 0x4e, 0x2f, 0x99, 0xcb, 0x2c, 0x70, 0xd3, 0xf0,
+	0x1b, 0xa9, 0xcb, 0xcb, 0xc0, 0x45, 0xb2, 0x05, 0x66, 0xc2, 0x5c, 0x59, 0xe7, 0x86, 0x2d, 0x8e,
+	0x42, 0x32, 0x65, 0xae, 0x55, 0x4f, 0x25, 0x53, 0xe6, 0xd2, 0x09, 0x58, 0xff, 0x23, 0x17, 0xb5,
+	0x69, 0x95, 0xab, 0xe1, 0x57, 0x8d, 0xe4, 0x00, 0x20, 0x1c, 0x45, 0xe8, 0x73, 0x31, 0x16, 0xb5,
+	0x87, 0xcd, 0x54, 0x72, 0xc1, 0x22, 0xbd, 0x35, 0xa6, 0xde, 0x1a, 0x7a, 0x0b, 0xbf, 0x54, 0xe4,
+	0x51, 0x0b, 0x53, 0x9c, 0x8b, 0xf1, 0x8c, 0xb9, 0xfc, 0x05, 0xdb, 0x2a, 0xec, 0x79, 0xe0, 0x73,
+	0xf4, 0xf9, 0x1c, 0xfb, 0xa2, 0x19, 0xd1, 0x01, 0xec, 0x3c, 0xf5, 0x50, 0x28, 0x2c, 0x58, 0x73,
+	0x52, 0x91, 0x74, 0x69, 0xdb, 0xf3, 0x2b, 0x7d, 0x03, 0xe4, 0x3c, 0xc2, 0x11, 0xc7, 0x67, 0x50,
+	0x35, 0xa3, 0xdd, 0xea, 0x52, 0xda, 0x6d, 0x43, 0xa7, 0x10, 0x3a, 0xc5, 0x42, 0x19, 0x90, 0x0b,
+	0xf4, 0xf0, 0x59, 0x19, 0x2b, 0x1e, 0x87, 0x12, 0x83, 0xcc, 0x12, 0x83, 0x04, 0x82, 0x42, 0x2a,
+	0x85, 0x60, 0x06, 0x9d, 0xb3, 0x38, 0x66, 0x53, 0xff, 0x75, 0xe0, 0x25, 0x33, 0x9c, 0x43, 0xe8,
+	0x42, 0xdd, 0x09, 0x12, 0xd5, 0xa2, 0xba, 0x9d, 0x5e, 0xc8, 0x21, 0x80, 0x13, 0x78, 0x1e, 0x3a,
+	0x9c, 0x05, 0xbe, 0x02, 0xa0, 0x49, 0x48, 0x1f, 0x5a, 0x11, 0x86, 0x1e, 0x73, 0x46, 0xd2, 0x20,
+	0x5d, 0x0d, 0x5d, 0x44, 0x3f, 0x40, 0xb7, 0x98, 0x4e, 0x0d, 0x65, 0x21, 0xd7, 0xc4, 0x72, 0x47,
+	0x9e, 0xca, 0x25, 0x8e, 0x72, 0x35, 0x93, 0xb1, 0xc7, 0x9c, 0xa1, 0x50, 0x98, 0x6a, 0x35, 0xa5,
+	0xe4, 0x36, 0xf2, 0x72, 0xe4, 0x35, 0x0d, 0x39, 0xbd, 0x83, 0xdd, 0xb3, 0x30, 0x44, 0xdf, 0xcd,
+	0xe8, 0x1d, 0xff, 0xd0, 0xf9, 0xf6, 0xc0, 0x2a, 0xc7, 0x4f, 0x6b, 0x1b, 0x7c, 0xa9, 0x43, 0xfb,
+	0x06, 0x47, 0x1f, 0x11, 0xa5, 0x36, 0x22, 0x53, 0xe8, 0x56, 0x3d, 0xe5, 0xe4, 0x38, 0x0f, 0xbe,
+	0xe4, 0xdb, 0xd1, 0xfb, 0xfd, 0x5b, 0x66, 0x6a, 0xb4, 0x2b, 0xe4, 0x0a, 0x5a, 0xda, 0xc3, 0x4d,
+	0xf6, 0x35, 0xc7, 0xd2, 0x37, 0xa0, 0x77, 0xb0, 0x40, 0x9b, 0x45, 0xbb, 0x83, 0x9f, 0x4b, 0xdc,
+	0x26, 0x34, 0xf7, 0x5a, 0xf4, 0xc0, 0xf4, 0x7e, 0x5b, 0x6a, 0x93, 0xc5, 0xbf, 0x85, 0xcd, 0x22,
+	0x65, 0xc9, 0xaf, 0x25, 0xc7, 0x22, 0xfd, 0x7b, 0xfd, 0xc5, 0x06, 0x7a, 0x13, 0x34, 0xea, 0xe9,
+	0x4d, 0x28, 0x93, 0x5d, 0x6f, 0x42, 0x15, 0x5f, 0x57, 0xc8, 0x5b, 0xd8, 0x7a, 0x3a, 0x68, 0x72,
+	0x94, 0x3b, 0x2d, 0x58, 0xb2, 0x1e, 0x5d, 0x66, 0xa2, 0x43, 0xd5, 0x38, 0xaa, 0x43, 0x2d, 0xbf,
+	0x12, 0x3a, 0xd4, 0x2a, 0x62, 0xaf, 0x90, 0x6b, 0x68, 0xeb, 0x5c, 0x23, 0x9a, 0x43, 0x05, 0xe5,
+	0x7b, 0x87, 0x8b, 0xd4, 0xf3, 0x80, 0xe3, 0x86, 0xfc, 0xc9, 0xf9, 0xfb, 0x6b, 0x00, 0x00, 0x00,
+	0xff, 0xff, 0xfe, 0xa5, 0x31, 0x33, 0xf3, 0x08, 0x00, 0x00,
 }
diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index 4d31782da..46a534ffa 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -9,6 +9,8 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"path/filepath"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"time"
+	"os"
 )
 
 func (fs *FilerServer) LookupDirectoryEntry(ctx context.Context, req *filer_pb.LookupDirectoryEntryRequest) (*filer_pb.LookupDirectoryEntryResponse, error) {
@@ -21,16 +23,11 @@ func (fs *FilerServer) LookupDirectoryEntry(ctx context.Context, req *filer_pb.L
 		return nil, fmt.Errorf("%s not found under %s", req.Name, req.Directory)
 	}
 
-	var fileId string
-	if !entry.IsDirectory() && len(entry.Chunks) > 0 {
-		fileId = string(entry.Chunks[0].Fid)
-	}
-
 	return &filer_pb.LookupDirectoryEntryResponse{
 		Entry: &filer_pb.Entry{
 			Name:        req.Name,
 			IsDirectory: entry.IsDirectory(),
-			FileId:      fileId,
+			Chunks:      entry.Chunks,
 		},
 	}, nil
 }
@@ -44,16 +41,12 @@ func (fs *FilerServer) ListEntries(ctx context.Context, req *filer_pb.ListEntrie
 
 	resp := &filer_pb.ListEntriesResponse{}
 	for _, entry := range entries {
-		var fileId string
-		if !entry.IsDirectory() && len(entry.Chunks) > 0 {
-			fileId = string(entry.Chunks[0].Fid)
-		}
 
 		glog.V(0).Infof("%s attr=%v size=%d", entry.Name(), entry.Attr, filer2.Chunks(entry.Chunks).TotalSize())
 		resp.Entries = append(resp.Entries, &filer_pb.Entry{
 			Name:        entry.Name(),
 			IsDirectory: entry.IsDirectory(),
-			FileId:      fileId,
+			Chunks:      entry.Chunks,
 			Attributes: &filer_pb.FuseAttributes{
 				FileSize: filer2.Chunks(entry.Chunks).TotalSize(),
 				Mtime:    entry.Mtime.Unix(),
@@ -106,15 +99,63 @@ func (fs *FilerServer) GetFileContent(ctx context.Context, req *filer_pb.GetFile
 	}, nil
 }
 
+func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntryRequest) (resp *filer_pb.CreateEntryResponse, err error) {
+	err = fs.filer.CreateEntry(&filer2.Entry{
+		FullPath: filer2.FullPath(filepath.Join(req.Directory, req.Entry.Name)),
+		Attr: filer2.Attr{
+			Mtime:  time.Unix(req.Entry.Attributes.Mtime, 0),
+			Crtime: time.Unix(req.Entry.Attributes.Mtime, 0),
+			Mode:   os.FileMode(req.Entry.Attributes.FileMode),
+			Uid:    req.Entry.Attributes.Uid,
+			Gid:    req.Entry.Attributes.Gid,
+		},
+	})
+
+	if err == nil {
+	}
+
+	return &filer_pb.CreateEntryResponse{}, err
+}
+
+func (fs *FilerServer) AppendFileChunks(ctx context.Context, req *filer_pb.AppendFileChunksRequest) (*filer_pb.AppendFileChunksResponse, error) {
+	err := fs.filer.AppendFileChunk(
+		filer2.FullPath(filepath.Join(req.Directory, req.Entry.Name)),
+		req.Entry.Chunks,
+	)
+
+	return &filer_pb.AppendFileChunksResponse{}, err
+}
+
 func (fs *FilerServer) DeleteEntry(ctx context.Context, req *filer_pb.DeleteEntryRequest) (resp *filer_pb.DeleteEntryResponse, err error) {
 	entry, err := fs.filer.DeleteEntry(filer2.FullPath(filepath.Join(req.Directory, req.Name)))
 	if err == nil {
 		for _, chunk := range entry.Chunks {
-			fid := string(chunk.Fid)
-			if err = operation.DeleteFile(fs.getMasterNode(), fid, fs.jwt(fid)); err != nil {
-				glog.V(0).Infof("deleting file %s: %v", fid, err)
+			if err = operation.DeleteFile(fs.getMasterNode(), chunk.FileId, fs.jwt(chunk.FileId)); err != nil {
+				glog.V(0).Infof("deleting file %s: %v", chunk.FileId, err)
 			}
 		}
 	}
 	return &filer_pb.DeleteEntryResponse{}, err
 }
+
+func (fs *FilerServer) AssignVolume(ctx context.Context, req *filer_pb.AssignVolumeRequest) (resp *filer_pb.AssignVolumeResponse, err error) {
+
+	assignResult, err := operation.Assign(fs.master, &operation.VolumeAssignRequest{
+		Count:       uint64(req.Count),
+		Replication: req.Replication,
+		Collection:  req.Collection,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("assign volume: %v", err)
+	}
+	if assignResult.Error != "" {
+		return nil, fmt.Errorf("assign volume result: %v", assignResult.Error)
+	}
+
+	return &filer_pb.AssignVolumeResponse{
+		FileId:    assignResult.Fid,
+		Count:     int32(assignResult.Count),
+		Url:       assignResult.Url,
+		PublicUrl: assignResult.PublicUrl,
+	}, err
+}
diff --git a/weed/server/filer_server_handlers_admin.go b/weed/server/filer_server_handlers_admin.go
index 5c1b23255..9872dcbd1 100644
--- a/weed/server/filer_server_handlers_admin.go
+++ b/weed/server/filer_server_handlers_admin.go
@@ -6,6 +6,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"strconv"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
 func (fs *FilerServer) registerHandler(w http.ResponseWriter, r *http.Request) {
@@ -22,9 +23,9 @@ func (fs *FilerServer) registerHandler(w http.ResponseWriter, r *http.Request) {
 		Attr: filer2.Attr{
 			Mode: 0660,
 		},
-		Chunks: []filer2.FileChunk{{
-			Fid:  filer2.FileId(fileId),
-			Size: fileSize,
+		Chunks: []*filer_pb.FileChunk{{
+			FileId: fileId,
+			Size:   fileSize,
 		}},
 	}
 	err = fs.filer.CreateEntry(entry)
diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index 9d13757be..3517299cf 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -98,7 +98,7 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 	}
 
 	// FIXME pick the right fid
-	fileId := string(entry.Chunks[0].Fid)
+	fileId := entry.Chunks[0].FileId
 
 	urlLocation, err := operation.LookupFileId(fs.getMasterNode(), fileId)
 	if err != nil {
diff --git a/weed/server/filer_server_handlers_write.go b/weed/server/filer_server_handlers_write.go
index 1a4b62235..4d988e6a2 100644
--- a/weed/server/filer_server_handlers_write.go
+++ b/weed/server/filer_server_handlers_write.go
@@ -23,6 +23,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/storage"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
 type FilerPostResult struct {
@@ -80,7 +81,7 @@ func (fs *FilerServer) queryFileInfoByPath(w http.ResponseWriter, r *http.Reques
 		glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
 		writeJsonError(w, r, http.StatusInternalServerError, err)
 	} else if found {
-		fileId = string(entry.Chunks[0].Fid)
+		fileId = entry.Chunks[0].FileId
 		urlLocation, err = operation.LookupFileId(fs.getMasterNode(), fileId)
 		if err != nil {
 			glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
@@ -318,7 +319,7 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	// also delete the old fid unless PUT operation
 	if r.Method != "PUT" {
 		if found, entry, err := fs.filer.FindEntry(filer2.FullPath(path)); err == nil && found {
-			oldFid := string(entry.Chunks[0].Fid)
+			oldFid := entry.Chunks[0].FileId
 			operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
 		} else if err != nil && err != filer.ErrNotFound {
 			glog.V(0).Infof("error %v occur when finding %s in filer store", err, path)
@@ -331,9 +332,9 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 		Attr: filer2.Attr{
 			Mode: 0660,
 		},
-		Chunks: []filer2.FileChunk{{
-			Fid:  filer2.FileId(fileId),
-			Size: uint64(r.ContentLength),
+		Chunks: []*filer_pb.FileChunk{{
+			FileId: fileId,
+			Size:   uint64(r.ContentLength),
 		}},
 	}
 	if db_err := fs.filer.CreateEntry(entry); db_err != nil {
@@ -415,7 +416,7 @@ func (fs *FilerServer) doAutoChunk(w http.ResponseWriter, r *http.Request, conte
 		fileName = path.Base(fileName)
 	}
 
-	var fileChunks []filer2.FileChunk
+	var fileChunks []*filer_pb.FileChunk
 
 	totalBytesRead := int64(0)
 	tmpBufferSize := int32(1024 * 1024)
@@ -455,8 +456,8 @@ func (fs *FilerServer) doAutoChunk(w http.ResponseWriter, r *http.Request, conte
 
 			// Save to chunk manifest structure
 			fileChunks = append(fileChunks,
-				filer2.FileChunk{
-					Fid:    filer2.FileId(fileId),
+				&filer_pb.FileChunk{
+					FileId: fileId,
 					Offset: chunkOffset,
 					Size:   uint64(chunkBufOffset),
 				},
@@ -483,7 +484,7 @@ func (fs *FilerServer) doAutoChunk(w http.ResponseWriter, r *http.Request, conte
 	if r.Method != "PUT" {
 		if found, entry, err := fs.filer.FindEntry(filer2.FullPath(path)); found && err == nil {
 			for _, chunk := range entry.Chunks {
-				oldFid := string(chunk.Fid)
+				oldFid := chunk.FileId
 				operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
 			}
 		} else if err != nil {
@@ -535,7 +536,7 @@ func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 
 	if entry != nil && !entry.IsDirectory() {
 		for _, chunk := range entry.Chunks {
-			oldFid := string(chunk.Fid)
+			oldFid := chunk.FileId
 			operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
 		}
 	}