diff --git a/weed-fs/src/cmd/weed/upload.go b/weed-fs/src/cmd/weed/upload.go
index 8502ca417..515816921 100644
--- a/weed-fs/src/cmd/weed/upload.go
+++ b/weed-fs/src/cmd/weed/upload.go
@@ -1,127 +1,150 @@
 package main
 
 import (
-  "bytes"
-  "encoding/json"
-  "errors"
-  "flag"
-  "fmt"
-  "io"
-  "io/ioutil"
-  "mime/multipart"
-  "net/http"
-  "net/url"
-  "os"
-  "pkg/util"
-  "strconv"
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"os"
+	"pkg/util"
+	"strconv"
 )
 
+var uploadReplication *string
+
 func init() {
-  cmdUpload.Run = runUpload // break init cycle
-  IsDebug = cmdUpload.Flag.Bool("debug", false, "verbose debug information")
-  server  = cmdUpload.Flag.String("server", "localhost:9333", "weedfs master location")
+	cmdUpload.Run = runUpload // break init cycle
+	IsDebug = cmdUpload.Flag.Bool("debug", false, "verbose debug information")
+	server = cmdUpload.Flag.String("server", "localhost:9333", "weedfs master location")
+	uploadReplication = cmdUpload.Flag.String("replication", "00", "replication type(00,01,10,11)")
 }
 
 var cmdUpload = &Command{
-  UsageLine: "upload -server=localhost:9333 file1 file2 file2",
-  Short:     "upload a set of files, using consecutive file keys",
-  Long: `upload a set of files, using consecutive file keys.
+	UsageLine: "upload -server=localhost:9333 file1 [file2 file3]",
+	Short:     "upload one or a list of files",
+	Long: `upload one or a list of files. 
+  It uses consecutive file keys for the list of files.
   e.g. If the file1 uses key k, file2 can be read via k_1
 
   `,
 }
 
 type AssignResult struct {
-  Fid       string "fid"
-  Url       string "url"
-  PublicUrl string "publicUrl"
-  Count     int    `json:",string"`
-  Error     string "error"
+	Fid       string "fid"
+	Url       string "url"
+	PublicUrl string "publicUrl"
+	Count     int
+	Error     string "error"
 }
 
 func assign(count int) (*AssignResult, error) {
-  values := make(url.Values)
-  values.Add("count", strconv.Itoa(count))
-  jsonBlob, err := util.Post("http://"+*server+"/dir/assign", values)
-  if err != nil {
-    return nil, err
-  }
-  var ret AssignResult
-  err = json.Unmarshal(jsonBlob, &ret)
-  if err != nil {
-    return nil, err
-  }
-  if ret.Count <= 0 {
-    return nil, errors.New(ret.Error)
-  }
-  return &ret, nil
+	values := make(url.Values)
+	values.Add("count", strconv.Itoa(count))
+	values.Add("replication", *uploadReplication)
+	jsonBlob, err := util.Post("http://"+*server+"/dir/assign2", values)
+	if *IsDebug {
+		fmt.Println("debug", *IsDebug, "assign result :", string(jsonBlob))
+	}
+	if err != nil {
+		return nil, err
+	}
+	var ret AssignResult
+	err = json.Unmarshal(jsonBlob, &ret)
+	if err != nil {
+		return nil, err
+	}
+	if ret.Count <= 0 {
+		return nil, errors.New(ret.Error)
+	}
+	return &ret, nil
 }
 
 type UploadResult struct {
-  Size int
+	Size int
 }
 
 func upload(filename string, uploadUrl string) (int, string) {
-  body_buf := bytes.NewBufferString("")
-  body_writer := multipart.NewWriter(body_buf)
-  file_writer, err := body_writer.CreateFormFile("file", filename)
-  if err != nil {
-    panic(err.Error())
-  }
-  fh, err := os.Open(filename)
-  if err != nil {
-    panic(err.Error())
-  }
-  io.Copy(file_writer, fh)
-  content_type := body_writer.FormDataContentType()
-  body_writer.Close()
-  resp, err := http.Post(uploadUrl, content_type, body_buf)
-  if err != nil {
-    panic(err.Error())
-  }
-  defer resp.Body.Close()
-  resp_body, err := ioutil.ReadAll(resp.Body)
-  if err != nil {
-    panic(err.Error())
-  }
-  var ret UploadResult
-  err = json.Unmarshal(resp_body, &ret)
-  if err != nil {
-    panic(err.Error())
-  }
-  //fmt.Println("Uploaded " + strconv.Itoa(ret.Size) + " Bytes to " + uploadUrl)
-  return ret.Size, uploadUrl
+	if *IsDebug {
+		fmt.Println("Start uploading file:", filename)
+	}
+	body_buf := bytes.NewBufferString("")
+	body_writer := multipart.NewWriter(body_buf)
+	file_writer, err := body_writer.CreateFormFile("file", filename)
+	if err != nil {
+		if *IsDebug {
+			fmt.Println("Failed to create form file:", filename)
+		}
+		panic(err.Error())
+	}
+	fh, err := os.Open(filename)
+	if err != nil {
+		if *IsDebug {
+			fmt.Println("Failed to open file:", filename)
+		}
+		panic(err.Error())
+	}
+	io.Copy(file_writer, fh)
+	content_type := body_writer.FormDataContentType()
+	body_writer.Close()
+	resp, err := http.Post(uploadUrl, content_type, body_buf)
+	if err != nil {
+		if *IsDebug {
+			fmt.Println("Failed to upload file to", uploadUrl)
+		}
+		panic(err.Error())
+	}
+	defer resp.Body.Close()
+	resp_body, err := ioutil.ReadAll(resp.Body)
+	if *IsDebug {
+		fmt.Println("Upload response:", string(resp_body))
+	}
+	if err != nil {
+		panic(err.Error())
+	}
+	var ret UploadResult
+	err = json.Unmarshal(resp_body, &ret)
+	if err != nil {
+		panic(err.Error())
+	}
+	//fmt.Println("Uploaded " + strconv.Itoa(ret.Size) + " Bytes to " + uploadUrl)
+	return ret.Size, uploadUrl
 }
 
 type SubmitResult struct {
-  Fid  string "fid"
-  Size int    "size"
+	Fid  string "fid"
+	Size int    "size"
 }
 
-func submit(files []string)([]SubmitResult) {
-  ret, err := assign(len(files))
-  if err != nil {
-    panic(err)
-  }
-  results := make([]SubmitResult, len(files))
-  for index, file := range files {
-    fid := ret.Fid
-    if index > 0 {
-      fid = fid + "_" + strconv.Itoa(index)
-    }
-    uploadUrl := "http://" + ret.PublicUrl + "/" + fid
-    results[index].Size, _ = upload(file, uploadUrl)
-    results[index].Fid = fid
-  }
-  return results
+func submit(files []string) []SubmitResult {
+	ret, err := assign(len(files))
+	if err != nil {
+		panic(err)
+	}
+	results := make([]SubmitResult, len(files))
+	for index, file := range files {
+		fid := ret.Fid
+		if index > 0 {
+			fid = fid + "_" + strconv.Itoa(index)
+		}
+		uploadUrl := "http://" + ret.PublicUrl + "/" + fid
+		results[index].Size, _ = upload(file, uploadUrl)
+		results[index].Fid = fid
+	}
+	return results
 }
 
 func runUpload(cmd *Command, args []string) bool {
-  if len(cmdUpload.Flag.Args()) == 0 {
-    return false
-  }
-  results := submit(flag.Args())
-  bytes, _ := json.Marshal(results)
-  fmt.Print(string(bytes))
-  return true
+	*IsDebug = true
+	if len(cmdUpload.Flag.Args()) == 0 {
+		return false
+	}
+	results := submit(args)
+	bytes, _ := json.Marshal(results)
+	fmt.Print(string(bytes))
+	return true
 }
diff --git a/weed-fs/src/cmd/weed/volume.go b/weed-fs/src/cmd/weed/volume.go
index bf941056c..66296c5ee 100644
--- a/weed-fs/src/cmd/weed/volume.go
+++ b/weed-fs/src/cmd/weed/volume.go
@@ -28,7 +28,7 @@ var cmdVolume = &Command{
 
 var (
 	vport          = cmdVolume.Flag.Int("port", 8080, "http listen port")
-	volumeFolder    = cmdVolume.Flag.String("dir", "/tmp", "data directory to store files")
+	volumeFolder   = cmdVolume.Flag.String("dir", "/tmp", "data directory to store files")
 	volumes        = cmdVolume.Flag.String("volumes", "", "comma-separated list, or ranges of volume ids")
 	publicUrl      = cmdVolume.Flag.String("publicUrl", "localhost:8080", "public url to serve data read")
 	masterNode     = cmdVolume.Flag.String("mserver", "localhost:9333", "master directory server to store mappings")
@@ -88,15 +88,16 @@ func GetHandler(w http.ResponseWriter, r *http.Request) {
 	}
 	cookie := n.Cookie
 	count, e := store.Read(volumeId, n)
-	if e != nil {
-    w.WriteHeader(404)
-	}
-	if *IsDebug {
-		log.Println("read bytes", count, "error", e)
+  if *IsDebug {
+    log.Println("read bytes", count, "error", e)
+  }
+	if e != nil || count <= 0 {
+		w.WriteHeader(404)
+		return
 	}
 	if n.Cookie != cookie {
 		log.Println("request with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
-    w.WriteHeader(404)
+		w.WriteHeader(404)
 		return
 	}
 	if ext != "" {
@@ -161,6 +162,7 @@ func DeleteHandler(w http.ResponseWriter, r *http.Request) {
 	writeJson(w, r, m)
 }
 func parseURLPath(path string) (vid, fid, ext string) {
+
 	sepIndex := strings.LastIndex(path, "/")
 	commaIndex := strings.LastIndex(path[sepIndex:], ",")
 	if commaIndex <= 0 {
@@ -181,17 +183,17 @@ func parseURLPath(path string) (vid, fid, ext string) {
 }
 
 func runVolume(cmd *Command, args []string) bool {
-  fileInfo, err := os.Stat(*volumeFolder)
+	fileInfo, err := os.Stat(*volumeFolder)
 	//TODO: now default to 1G, this value should come from server?
-	if err!=nil{
-	  log.Fatalf("No Existing Folder:%s", *volumeFolder)
+	if err != nil {
+		log.Fatalf("No Existing Folder:%s", *volumeFolder)
 	}
 	if !fileInfo.IsDir() {
-    log.Fatalf("Volume Folder should not be a file:%s", *volumeFolder)
+		log.Fatalf("Volume Folder should not be a file:%s", *volumeFolder)
 	}
-  perm:=fileInfo.Mode().Perm()
-  log.Println("Volume Folder permission:", perm)
-	
+	perm := fileInfo.Mode().Perm()
+	log.Println("Volume Folder permission:", perm)
+
 	store = storage.NewStore(*vport, *publicUrl, *volumeFolder, *maxVolumeCount, *volumes)
 	defer store.Close()
 	http.HandleFunc("/", storeHandler)
@@ -199,7 +201,6 @@ func runVolume(cmd *Command, args []string) bool {
 	http.HandleFunc("/admin/assign_volume", assignVolumeHandler)
 	http.HandleFunc("/admin/set_volume_locations_list", setVolumeLocationsHandler)
 
-
 	go func() {
 		for {
 			store.Join(*masterNode)
diff --git a/weed-fs/src/pkg/replication/volume_growth.go b/weed-fs/src/pkg/replication/volume_growth.go
index 41d7bd18c..0176033d8 100644
--- a/weed-fs/src/pkg/replication/volume_growth.go
+++ b/weed-fs/src/pkg/replication/volume_growth.go
@@ -126,7 +126,7 @@ func (vg *VolumeGrowth) GrowByCountAndType(count int, repType storage.Replicatio
 func (vg *VolumeGrowth) grow(topo *topology.Topology, vid storage.VolumeId, repType storage.ReplicationType, servers ...*topology.DataNode) error {
 	for _, server := range servers {
 		if err := AllocateVolume(server, vid, repType); err == nil {
-			vi := storage.VolumeInfo{Id: vid, Size: 0}
+			vi := storage.VolumeInfo{Id: vid, Size: 0, RepType:repType}
 			server.AddOrUpdateVolume(vi)
 			topo.RegisterVolumeLayout(&vi, server)
 			fmt.Println("Created Volume", vid, "on", server)
diff --git a/weed-fs/src/pkg/topology/data_center.go b/weed-fs/src/pkg/topology/data_center.go
index c661090e8..a5d8cc749 100644
--- a/weed-fs/src/pkg/topology/data_center.go
+++ b/weed-fs/src/pkg/topology/data_center.go
@@ -38,6 +38,7 @@ func (dc *DataCenter) GetOrCreateRack(ip string) *Rack {
 
 func (dc *DataCenter) ToMap() interface{}{
   m := make(map[string]interface{})
+  m["Max"] = dc.GetMaxVolumeCount()
   m["Free"] = dc.FreeSpace()
   var racks []interface{}
   for _, c := range dc.Children() {
diff --git a/weed-fs/src/pkg/topology/data_node.go b/weed-fs/src/pkg/topology/data_node.go
index cb625a41b..cfdae45c3 100644
--- a/weed-fs/src/pkg/topology/data_node.go
+++ b/weed-fs/src/pkg/topology/data_node.go
@@ -49,8 +49,8 @@ func (dn *DataNode) ToMap() interface{} {
 	ret["Ip"] = dn.Ip
 	ret["Port"] = dn.Port
 	ret["Volumes"] = dn.GetActiveVolumeCount()
-	ret["MaxVolumeCount"] = dn.GetMaxVolumeCount()
-	ret["FreeVolumeCount"] = dn.FreeSpace()
+	ret["Max"] = dn.GetMaxVolumeCount()
+	ret["Free"] = dn.FreeSpace()
 	ret["PublicUrl"] = dn.PublicUrl
 	return ret
 }
diff --git a/weed-fs/src/pkg/topology/rack.go b/weed-fs/src/pkg/topology/rack.go
index 16520d14a..bea7d61d7 100644
--- a/weed-fs/src/pkg/topology/rack.go
+++ b/weed-fs/src/pkg/topology/rack.go
@@ -32,10 +32,10 @@ func (r *Rack) GetOrCreateDataNode(ip string, port int, publicUrl string, maxVol
 		if dn.MatchLocation(ip, port) {
 			dn.LastSeen = time.Now().Unix()
 			if dn.Dead {
-			  dn.Dead = false
-			  r.GetTopology().chanRecoveredDataNodes <- dn
+				dn.Dead = false
+				r.GetTopology().chanRecoveredDataNodes <- dn
+				dn.UpAdjustMaxVolumeCountDelta(maxVolumeCount - dn.maxVolumeCount)
 			}
-			dn.UpAdjustMaxVolumeCountDelta(maxVolumeCount - dn.maxVolumeCount)
 			return dn
 		}
 	}
@@ -51,6 +51,7 @@ func (r *Rack) GetOrCreateDataNode(ip string, port int, publicUrl string, maxVol
 
 func (rack *Rack) ToMap() interface{} {
 	m := make(map[string]interface{})
+	m["Max"] = rack.GetMaxVolumeCount()
 	m["Free"] = rack.FreeSpace()
 	var dns []interface{}
 	for _, c := range rack.Children() {
diff --git a/weed-fs/src/pkg/topology/topology.go b/weed-fs/src/pkg/topology/topology.go
index 8dcd64dca..90f402e28 100644
--- a/weed-fs/src/pkg/topology/topology.go
+++ b/weed-fs/src/pkg/topology/topology.go
@@ -23,8 +23,6 @@ type Topology struct {
 	chanDeadDataNodes      chan *DataNode
 	chanRecoveredDataNodes chan *DataNode
 	chanFullVolumes        chan *storage.VolumeInfo
-	chanIncomplemteVolumes chan *storage.VolumeInfo
-	chanRecoveredVolumes   chan *storage.VolumeInfo
 }
 
 func NewTopology(id string, dirname string, filename string, volumeSizeLimit uint64, pulse int) *Topology {
@@ -42,8 +40,6 @@ func NewTopology(id string, dirname string, filename string, volumeSizeLimit uin
 	t.chanDeadDataNodes = make(chan *DataNode)
 	t.chanRecoveredDataNodes = make(chan *DataNode)
 	t.chanFullVolumes = make(chan *storage.VolumeInfo)
-	t.chanIncomplemteVolumes = make(chan *storage.VolumeInfo)
-	t.chanRecoveredVolumes = make(chan *storage.VolumeInfo)
 
 	return t
 }
@@ -124,6 +120,7 @@ func (t *Topology) GetOrCreateDataCenter(ip string) *DataCenter {
 
 func (t *Topology) ToMap() interface{} {
 	m := make(map[string]interface{})
+  m["Max"] = t.GetMaxVolumeCount()
 	m["Free"] = t.FreeSpace()
 	var dcs []interface{}
 	for _, c := range t.Children() {
diff --git a/weed-fs/src/pkg/topology/topology_event_handling.go b/weed-fs/src/pkg/topology/topology_event_handling.go
index 813826a61..0ede2ba1e 100644
--- a/weed-fs/src/pkg/topology/topology_event_handling.go
+++ b/weed-fs/src/pkg/topology/topology_event_handling.go
@@ -18,10 +18,6 @@ func (t *Topology) StartRefreshWritableVolumes() {
 	go func() {
 		for {
 			select {
-			case v := <-t.chanIncomplemteVolumes:
-				fmt.Println("Volume", v, "is incomplete!")
-			case v := <-t.chanRecoveredVolumes:
-				fmt.Println("Volume", v, "is recovered!")
 			case v := <-t.chanFullVolumes:
 				t.SetVolumeCapacityFull(v)
 				fmt.Println("Volume", v, "is full!")
@@ -38,6 +34,9 @@ func (t *Topology) StartRefreshWritableVolumes() {
 func (t *Topology) SetVolumeCapacityFull(volumeInfo *storage.VolumeInfo) {
 	vl := t.GetVolumeLayout(volumeInfo.RepType)
 	vl.SetVolumeCapacityFull(volumeInfo.Id)
+	for _, dn := range vl.vid2location[volumeInfo.Id].list {
+		dn.UpAdjustActiveVolumeCountDelta(-1)
+	}
 }
 func (t *Topology) UnRegisterDataNode(dn *DataNode) {
 	for _, v := range dn.volumes {
@@ -45,6 +44,9 @@ func (t *Topology) UnRegisterDataNode(dn *DataNode) {
 		vl := t.GetVolumeLayout(v.RepType)
 		vl.SetVolumeUnavailable(dn, v.Id)
 	}
+	dn.UpAdjustActiveVolumeCountDelta(-dn.GetActiveVolumeCount())
+	dn.UpAdjustMaxVolumeCountDelta(-dn.GetMaxVolumeCount())
+	dn.Parent().UnlinkChildNode(dn.Id())
 }
 func (t *Topology) RegisterRecoveredDataNode(dn *DataNode) {
 	for _, v := range dn.volumes {
diff --git a/weed-fs/src/pkg/topology/volume_layout.go b/weed-fs/src/pkg/topology/volume_layout.go
index ba091b9bb..5159e8e75 100644
--- a/weed-fs/src/pkg/topology/volume_layout.go
+++ b/weed-fs/src/pkg/topology/volume_layout.go
@@ -76,16 +76,18 @@ func (vl *VolumeLayout) setVolumeWritable(vid storage.VolumeId) bool {
 }
 
 func (vl *VolumeLayout) SetVolumeUnavailable(dn *DataNode, vid storage.VolumeId) bool {
-  if vl.vid2location[vid].Remove(dn) {
-    if vl.vid2location[vid].Length() < vl.repType.GetCopyCount() {
-      return vl.removeFromWritable(vid)
-    }
-  }
-  return false
+	if vl.vid2location[vid].Remove(dn) {
+		if vl.vid2location[vid].Length() < vl.repType.GetCopyCount() {
+			fmt.Println("Volume", vid, "has", vl.vid2location[vid].Length(), "replica, less than required", vl.repType.GetCopyCount())
+			return vl.removeFromWritable(vid)
+		}
+	}
+	return false
 }
 func (vl *VolumeLayout) SetVolumeAvailable(dn *DataNode, vid storage.VolumeId) bool {
 	if vl.vid2location[vid].Add(dn) {
 		if vl.vid2location[vid].Length() >= vl.repType.GetCopyCount() {
+			fmt.Println("Volume", vid, "becomes writable")
 			return vl.setVolumeWritable(vid)
 		}
 	}