Merge pull request #33 from chrislusf/master

sync

34 files changed, 487 insertions, 417 deletions

diff --git a/weed/command/filer_copy.go b/weed/command/filer_copy.go
index 88148acc5..2295faa8a 100644
--- a/weed/command/filer_copy.go
+++ b/weed/command/filer_copy.go
@@ -111,11 +111,23 @@ func runCopy(cmd *Command, args []string) bool {
 	filerGrpcAddress := fmt.Sprintf("%s:%d", filerUrl.Hostname(), filerGrpcPort)
 	copy.grpcDialOption = security.LoadClientTLS(util.GetViper(), "grpc.client")
 
-	masters, collection, replication, maxMB, cipher, err := readFilerConfiguration(copy.grpcDialOption, filerGrpcAddress)
+	masters, collection, replication, dirBuckets, maxMB, cipher, err := readFilerConfiguration(copy.grpcDialOption, filerGrpcAddress)
 	if err != nil {
 		fmt.Printf("read from filer %s: %v\n", filerGrpcAddress, err)
 		return false
 	}
+	if strings.HasPrefix(urlPath, dirBuckets+"/") {
+		restPath := urlPath[len(dirBuckets)+1:]
+		if strings.Index(restPath, "/") > 0 {
+			expectedBucket := restPath[:strings.Index(restPath, "/")]
+			if *copy.collection == "" {
+				*copy.collection = expectedBucket
+			} else {
+				fmt.Printf("destination %s uses collection \"%s\": unexpected collection \"%v\"\n", urlPath, expectedBucket, *copy.collection)
+				return true
+			}
+		}
+	}
 	if *copy.collection == "" {
 		*copy.collection = collection
 	}
@@ -170,13 +182,14 @@ func runCopy(cmd *Command, args []string) bool {
 	return true
 }
 
-func readFilerConfiguration(grpcDialOption grpc.DialOption, filerGrpcAddress string) (masters []string, collection, replication string, maxMB uint32, cipher bool, err error) {
+func readFilerConfiguration(grpcDialOption grpc.DialOption, filerGrpcAddress string) (masters []string, collection, replication string, dirBuckets string, maxMB uint32, cipher bool, err error) {
 	err = pb.WithGrpcFilerClient(filerGrpcAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 		resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 		if err != nil {
 			return fmt.Errorf("get filer %s configuration: %v", filerGrpcAddress, err)
 		}
 		masters, collection, replication, maxMB = resp.Masters, resp.Collection, resp.Replication, resp.MaxMb
+		dirBuckets = resp.DirBuckets
 		cipher = resp.Cipher
 		return nil
 	})
@@ -206,7 +219,7 @@ func genFileCopyTask(fileOrDir string, destPath string, fileCopyTaskChan chan Fi
 
 	fileCopyTaskChan <- FileCopyTask{
 		sourceLocation:     fileOrDir,
-		destinationUrlPath: destPath,
+		destinationUrlPath: destPath+fi.Name(),
 		fileSize:           fi.Size(),
 		fileMode:           fi.Mode(),
 		uid:                uid,
@@ -298,7 +311,7 @@ func (worker *FileCopyWorker) uploadFileAsOne(task FileCopyTask, f *os.File) err
 				Replication: *worker.options.replication,
 				Collection:  *worker.options.collection,
 				TtlSec:      worker.options.ttlSec,
-				ParentPath:  task.destinationUrlPath,
+				Path:        task.destinationUrlPath,
 			}
 
 			assignResult, assignError = client.AssignVolume(context.Background(), request)
@@ -392,7 +405,7 @@ func (worker *FileCopyWorker) uploadFileInChunks(task FileCopyTask, f *os.File,
 					Replication: *worker.options.replication,
 					Collection:  *worker.options.collection,
 					TtlSec:      worker.options.ttlSec,
-					ParentPath:  task.destinationUrlPath,
+					Path:        task.destinationUrlPath+fileName,
 				}
 
 				assignResult, assignError = client.AssignVolume(context.Background(), request)
diff --git a/weed/command/master.go b/weed/command/master.go
index 74c170395..c03da7f5d 100644
--- a/weed/command/master.go
+++ b/weed/command/master.go
@@ -89,6 +89,10 @@ func runMaster(cmd *Command, args []string) bool {
 	runtime.GOMAXPROCS(runtime.NumCPU())
 	grace.SetupProfiling(*masterCpuProfile, *masterMemProfile)
 
+	parent, _ := util.FullPath(*m.metaFolder).DirAndName()
+	if util.FileExists(string(parent)) && !util.FileExists(*m.metaFolder) {
+		os.MkdirAll(*m.metaFolder, 0755)
+	}
 	if err := util.TestFolderWritable(util.ResolvePath(*m.metaFolder)); err != nil {
 		glog.Fatalf("Check Meta Folder (-mdir) Writable %s : %s", *m.metaFolder, err)
 	}
@@ -122,7 +126,7 @@ func startMaster(masterOption MasterOptions, masterWhiteList []string) {
 	}
 	// start raftServer
 	raftServer, err := weed_server.NewRaftServer(security.LoadClientTLS(util.GetViper(), "grpc.master"),
-		peers, myMasterAddress, util.ResolvePath(*masterOption.metaFolder), ms.Topo, 5, *masterOption.raftResumeState)
+		peers, myMasterAddress, util.ResolvePath(*masterOption.metaFolder), ms.Topo, *masterOption.raftResumeState)
 	if raftServer == nil {
 		glog.Fatalf("please verify %s is writable, see https://github.com/chrislusf/seaweedfs/issues/717: %s", *masterOption.metaFolder, err)
 	}
diff --git a/weed/command/mount.go b/weed/command/mount.go
index f9700679d..7fdb21254 100644
--- a/weed/command/mount.go
+++ b/weed/command/mount.go
@@ -41,7 +41,7 @@ func init() {
 	mountOptions.collection = cmdMount.Flag.String("collection", "", "collection to create the files")
 	mountOptions.replication = cmdMount.Flag.String("replication", "", "replication(e.g. 000, 001) to create to files. If empty, let filer decide.")
 	mountOptions.ttlSec = cmdMount.Flag.Int("ttl", 0, "file ttl in seconds")
-	mountOptions.chunkSizeLimitMB = cmdMount.Flag.Int("chunkSizeLimitMB", 16, "local write buffer size, also chunk large files")
+	mountOptions.chunkSizeLimitMB = cmdMount.Flag.Int("chunkSizeLimitMB", 2, "local write buffer size, also chunk large files")
 	mountOptions.cacheDir = cmdMount.Flag.String("cacheDir", os.TempDir(), "local cache directory for file chunks and meta data")
 	mountOptions.cacheSizeMB = cmdMount.Flag.Int64("cacheCapacityMB", 1000, "local file chunk cache capacity in MB (0 will disable cache)")
 	mountOptions.dataCenter = cmdMount.Flag.String("dataCenter", "", "prefer to write to the data center")
diff --git a/weed/filer/filechunk_manifest.go b/weed/filer/filechunk_manifest.go
index f45448a6e..0d01a4a36 100644
--- a/weed/filer/filechunk_manifest.go
+++ b/weed/filer/filechunk_manifest.go
@@ -101,7 +101,7 @@ func retriedFetchChunkData(urlStrings []string, cipherKey []byte, isGzipped bool
 
 	for waitTime := time.Second; waitTime < ReadWaitTime; waitTime += waitTime / 2 {
 		for _, urlString := range urlStrings {
-			shouldRetry, err = util.ReadUrlAsStream(urlString, cipherKey, isGzipped, isFullChunk, offset, size, func(data []byte) {
+			shouldRetry, err = util.ReadUrlAsStream(urlString+"?readDeleted=true", cipherKey, isGzipped, isFullChunk, offset, size, func(data []byte) {
 				buffer.Write(data)
 			})
 			if !shouldRetry {
diff --git a/weed/filer/filer.go b/weed/filer/filer.go
index 5b0698211..35f4cdc6a 100644
--- a/weed/filer/filer.go
+++ b/weed/filer/filer.go
@@ -206,8 +206,8 @@ func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool, isFr
 
 	oldEntry, _ := f.FindEntry(ctx, entry.FullPath)
 
-	glog.V(4).Infof("CreateEntry %s: old entry: %v exclusive:%v", entry.FullPath, oldEntry, o_excl)
 	if oldEntry == nil {
+		glog.V(4).Infof("InsertEntry %s: new entry: %v", entry.FullPath, entry.Name())
 		if err := f.Store.InsertEntry(ctx, entry); err != nil {
 			glog.Errorf("insert entry %s: %v", entry.FullPath, err)
 			return fmt.Errorf("insert entry %s: %v", entry.FullPath, err)
@@ -217,6 +217,7 @@ func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool, isFr
 			glog.V(3).Infof("EEXIST: entry %s already exists", entry.FullPath)
 			return fmt.Errorf("EEXIST: entry %s already exists", entry.FullPath)
 		}
+		glog.V(4).Infof("UpdateEntry %s: old entry: %v", entry.FullPath, oldEntry.Name())
 		if err := f.UpdateEntry(ctx, oldEntry, entry); err != nil {
 			glog.Errorf("update entry %s: %v", entry.FullPath, err)
 			return fmt.Errorf("update entry %s: %v", entry.FullPath, err)
diff --git a/weed/filer/postgres/postgres_store.go b/weed/filer/postgres/postgres_store.go
index c41700d17..2325568fe 100644
--- a/weed/filer/postgres/postgres_store.go
+++ b/weed/filer/postgres/postgres_store.go
@@ -11,7 +11,7 @@ import (
 )
 
 const (
-	CONNECTION_URL_PATTERN = "host=%s port=%d user=%s sslmode=%s connect_timeout=30"
+	CONNECTION_URL_PATTERN = "host=%s port=%d sslmode=%s connect_timeout=30"
 )
 
 func init() {
@@ -49,7 +49,10 @@ func (store *PostgresStore) initialize(user, password, hostname string, port int
 	store.SqlListExclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=$1 AND name>$2 AND directory=$3 AND name like $4 ORDER BY NAME ASC LIMIT $5"
 	store.SqlListInclusive = "SELECT NAME, meta FROM filemeta WHERE dirhash=$1 AND name>=$2 AND directory=$3 AND name like $4 ORDER BY NAME ASC LIMIT $5"
 
-	sqlUrl := fmt.Sprintf(CONNECTION_URL_PATTERN, hostname, port, user, sslmode)
+	sqlUrl := fmt.Sprintf(CONNECTION_URL_PATTERN, hostname, port, sslmode)
+	if user != "" {
+		sqlUrl += " user=" + user
+	}
 	if password != "" {
 		sqlUrl += " password=" + password
 	}
diff --git a/weed/filer/stream.go b/weed/filer/stream.go
index 363b07f14..cffdc8303 100644
--- a/weed/filer/stream.go
+++ b/weed/filer/stream.go
@@ -181,7 +181,7 @@ func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
 	var buffer bytes.Buffer
 	var shouldRetry bool
 	for _, urlString := range urlStrings {
-		shouldRetry, err = util.ReadUrlAsStream(urlString, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
+		shouldRetry, err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
 			buffer.Write(data)
 		})
 		if !shouldRetry {
diff --git a/weed/filesys/dirty_page.go b/weed/filesys/dirty_page.go
index 6fda134aa..dd0c48796 100644
--- a/weed/filesys/dirty_page.go
+++ b/weed/filesys/dirty_page.go
@@ -9,10 +9,12 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 var (
 	concurrentWriterLimit = runtime.NumCPU()
+	concurrentWriters     = util.NewLimitedConcurrentExecutor(4 * concurrentWriterLimit)
 )
 
 type ContinuousDirtyPages struct {
@@ -93,8 +95,6 @@ func (pages *ContinuousDirtyPages) saveExistingLargestPageToStorage() (hasSavedD
 
 	pages.saveToStorage(maxList.ToReader(), maxList.Offset(), chunkSize)
 
-	maxList.Destroy()
-
 	return true
 }
 
@@ -110,10 +110,8 @@ func (pages *ContinuousDirtyPages) saveToStorage(reader io.Reader, offset int64,
 	go func() {
 		defer pages.writeWaitGroup.Done()
 
-		dir, _ := pages.f.fullpath().DirAndName()
-
 		reader = io.LimitReader(reader, size)
-		chunk, collection, replication, err := pages.f.wfs.saveDataAsChunk(dir)(reader, pages.f.Name, offset)
+		chunk, collection, replication, err := pages.f.wfs.saveDataAsChunk(pages.f.fullpath())(reader, pages.f.Name, offset)
 		if err != nil {
 			glog.V(0).Infof("%s saveToStorage [%d,%d): %v", pages.f.fullpath(), offset, offset+size, err)
 			pages.chunkSaveErrChan <- err
diff --git a/weed/filesys/dirty_page_interval.go b/weed/filesys/dirty_page_interval.go
index f644bea0b..1404bf78c 100644
--- a/weed/filesys/dirty_page_interval.go
+++ b/weed/filesys/dirty_page_interval.go
@@ -5,7 +5,6 @@ import (
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/valyala/bytebufferpool"
 )
 
 type IntervalNode struct {
@@ -13,15 +12,6 @@ type IntervalNode struct {
 	Offset int64
 	Size   int64
 	Next   *IntervalNode
-	Buffer *bytebufferpool.ByteBuffer
-}
-
-func (l *IntervalNode) Bytes() []byte {
-	data := l.Data
-	if data == nil {
-		data = l.Buffer.Bytes()
-	}
-	return data
 }
 
 type IntervalLinkedList struct {
@@ -33,39 +23,16 @@ type ContinuousIntervals struct {
 	lists []*IntervalLinkedList
 }
 
-func NewIntervalLinkedList(head, tail *IntervalNode) *IntervalLinkedList {
-	list := &IntervalLinkedList{
-		Head: head,
-		Tail: tail,
-	}
-	return list
-}
-
-func (list *IntervalLinkedList) Destroy() {
-	for t := list.Head; t != nil; t = t.Next {
-		if t.Buffer != nil {
-			bytebufferpool.Put(t.Buffer)
-		}
-	}
-}
-
 func (list *IntervalLinkedList) Offset() int64 {
 	return list.Head.Offset
 }
 func (list *IntervalLinkedList) Size() int64 {
 	return list.Tail.Offset + list.Tail.Size - list.Head.Offset
 }
-
 func (list *IntervalLinkedList) addNodeToTail(node *IntervalNode) {
 	// glog.V(4).Infof("add to tail [%d,%d) + [%d,%d) => [%d,%d)", list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, node.Offset+node.Size, list.Head.Offset, node.Offset+node.Size)
-	if list.Tail.Buffer == nil {
-		list.Tail.Buffer = bytebufferpool.Get()
-		list.Tail.Buffer.Write(list.Tail.Data)
-		list.Tail.Data = nil
-	}
-	list.Tail.Buffer.Write(node.Data)
-	list.Tail.Size += int64(len(node.Data))
-	return
+	list.Tail.Next = node
+	list.Tail = node
 }
 func (list *IntervalLinkedList) addNodeToHead(node *IntervalNode) {
 	// glog.V(4).Infof("add to head [%d,%d) + [%d,%d) => [%d,%d)", node.Offset, node.Offset+node.Size, list.Head.Offset, list.Tail.Offset+list.Tail.Size, node.Offset, list.Tail.Offset+list.Tail.Size)
@@ -80,7 +47,7 @@ func (list *IntervalLinkedList) ReadData(buf []byte, start, stop int64) {
 		nodeStart, nodeStop := max(start, t.Offset), min(stop, t.Offset+t.Size)
 		if nodeStart < nodeStop {
 			// glog.V(0).Infof("copying start=%d stop=%d t=[%d,%d) t.data=%d => bufSize=%d nodeStart=%d, nodeStop=%d", start, stop, t.Offset, t.Offset+t.Size, len(t.Data), len(buf), nodeStart, nodeStop)
-			copy(buf[nodeStart-start:], t.Bytes()[nodeStart-t.Offset:nodeStop-t.Offset])
+			copy(buf[nodeStart-start:], t.Data[nodeStart-t.Offset:nodeStop-t.Offset])
 		}
 
 		if t.Next == nil {
@@ -105,15 +72,8 @@ func subList(list *IntervalLinkedList, start, stop int64) *IntervalLinkedList {
 			// skip non overlapping IntervalNode
 			continue
 		}
-		data := t.Bytes()[nodeStart-t.Offset : nodeStop-t.Offset]
-		if t.Data == nil {
-			// need to clone if the bytes is from byte buffer
-			t := make([]byte, len(data))
-			copy(t, data)
-			data = t
-		}
 		nodes = append(nodes, &IntervalNode{
-			Data:   data,
+			Data:   t.Data[nodeStart-t.Offset : nodeStop-t.Offset],
 			Offset: nodeStart,
 			Size:   nodeStop - nodeStart,
 			Next:   nil,
@@ -122,7 +82,10 @@ func subList(list *IntervalLinkedList, start, stop int64) *IntervalLinkedList {
 	for i := 1; i < len(nodes); i++ {
 		nodes[i-1].Next = nodes[i]
 	}
-	return NewIntervalLinkedList(nodes[0], nodes[len(nodes)-1])
+	return &IntervalLinkedList{
+		Head: nodes[0],
+		Tail: nodes[len(nodes)-1],
+	}
 }
 
 func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) {
@@ -132,7 +95,7 @@ func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) {
 	// append to the tail and return
 	if len(c.lists) == 1 {
 		lastSpan := c.lists[0]
-		if lastSpan.Tail.Offset + lastSpan.Tail.Size == offset {
+		if lastSpan.Tail.Offset+lastSpan.Tail.Size == offset {
 			lastSpan.addNodeToTail(interval)
 			return
 		}
@@ -190,7 +153,10 @@ func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) {
 		nextList.addNodeToHead(interval)
 	}
 	if prevList == nil && nextList == nil {
-		c.lists = append(c.lists, NewIntervalLinkedList(interval, interval))
+		c.lists = append(c.lists, &IntervalLinkedList{
+			Head: interval,
+			Tail: interval,
+		})
 	}
 
 	return
@@ -198,12 +164,11 @@ func (c *ContinuousIntervals) AddInterval(data []byte, offset int64) {
 
 func (c *ContinuousIntervals) RemoveLargestIntervalLinkedList() *IntervalLinkedList {
 	var maxSize int64
-	maxIndex, maxOffset := -1, int64(-1)
+	maxIndex := -1
 	for k, list := range c.lists {
-		listSize := list.Size()
-		if maxSize < listSize || (maxSize == listSize && list.Offset() < maxOffset ) {
-			maxSize = listSize
-			maxIndex, maxOffset = k, list.Offset()
+		if maxSize <= list.Size() {
+			maxSize = list.Size()
+			maxIndex = k
 		}
 	}
 	if maxSize <= 0 {
@@ -246,10 +211,10 @@ func (c *ContinuousIntervals) ReadDataAt(data []byte, startOffset int64) (maxSto
 func (l *IntervalLinkedList) ToReader() io.Reader {
 	var readers []io.Reader
 	t := l.Head
-	readers = append(readers, util.NewBytesReader(t.Bytes()))
+	readers = append(readers, util.NewBytesReader(t.Data))
 	for t.Next != nil {
 		t = t.Next
-		readers = append(readers, bytes.NewReader(t.Bytes()))
+		readers = append(readers, bytes.NewReader(t.Data))
 	}
 	if len(readers) == 1 {
 		return readers[0]
diff --git a/weed/filesys/file.go b/weed/filesys/file.go
index 98ee010d8..7aa1016d7 100644
--- a/weed/filesys/file.go
+++ b/weed/filesys/file.go
@@ -253,15 +253,16 @@ func (file *File) Forget() {
 }
 
 func (file *File) maybeLoadEntry(ctx context.Context) error {
-	if (file.entry == nil || len(file.entry.HardLinkId) != 0) && file.isOpen <= 0 {
-		entry, err := file.wfs.maybeLoadEntry(file.dir.FullPath(), file.Name)
-		if err != nil {
-			glog.V(3).Infof("maybeLoadEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err)
-			return err
-		}
-		if entry != nil {
-			file.setEntry(entry)
-		}
+	if (file.entry != nil && len(file.entry.HardLinkId) != 0) || file.isOpen > 0 {
+		return nil
+	}
+	entry, err := file.wfs.maybeLoadEntry(file.dir.FullPath(), file.Name)
+	if err != nil {
+		glog.V(3).Infof("maybeLoadEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err)
+		return err
+	}
+	if entry != nil {
+		file.setEntry(entry)
 	}
 	return nil
 }
diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index e3163117c..54bde3494 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -126,7 +126,7 @@ func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, error) {
 
 	totalRead, err := fh.f.reader.ReadAt(buff, offset)
 
-	if err != nil && err != io.EOF{
+	if err != nil && err != io.EOF {
 		glog.Errorf("file handle read %s: %v", fh.f.fullpath(), err)
 	}
 
@@ -143,6 +143,11 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 
 	// write the request to volume servers
 	data := req.Data
+	if len(data) <= 512 {
+		// fuse message cacheable size
+		data = make([]byte, len(req.Data))
+		copy(data, req.Data)
+	}
 
 	fh.f.entry.Attributes.FileSize = uint64(max(req.Offset+int64(len(data)), int64(fh.f.entry.Attributes.FileSize)))
 	glog.V(4).Infof("%v write [%d,%d) %d", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)), len(req.Data))
@@ -251,7 +256,7 @@ func (fh *FileHandle) doFlush(ctx context.Context, header fuse.Header) error {
 		manifestChunks, nonManifestChunks := filer.SeparateManifestChunks(fh.f.entry.Chunks)
 
 		chunks, _ := filer.CompactFileChunks(filer.LookupFn(fh.f.wfs), nonManifestChunks)
-		chunks, manifestErr := filer.MaybeManifestize(fh.f.wfs.saveDataAsChunk(fh.f.dir.FullPath()), chunks)
+		chunks, manifestErr := filer.MaybeManifestize(fh.f.wfs.saveDataAsChunk(fh.f.fullpath()), chunks)
 		if manifestErr != nil {
 			// not good, but should be ok
 			glog.V(0).Infof("MaybeManifestize: %v", manifestErr)
diff --git a/weed/filesys/meta_cache/meta_cache.go b/weed/filesys/meta_cache/meta_cache.go
index 0dd129623..4b282253d 100644
--- a/weed/filesys/meta_cache/meta_cache.go
+++ b/weed/filesys/meta_cache/meta_cache.go
@@ -21,13 +21,15 @@ type MetaCache struct {
 	sync.RWMutex
 	visitedBoundary *bounded_tree.BoundedTree
 	uidGidMapper    *UidGidMapper
+	invalidateFunc  func(util.FullPath)
 }
 
-func NewMetaCache(dbFolder string, baseDir util.FullPath, uidGidMapper *UidGidMapper) *MetaCache {
+func NewMetaCache(dbFolder string, baseDir util.FullPath, uidGidMapper *UidGidMapper, invalidateFunc func(util.FullPath)) *MetaCache {
 	return &MetaCache{
 		localStore:      openMetaStore(dbFolder),
 		visitedBoundary: bounded_tree.NewBoundedTree(baseDir),
 		uidGidMapper:    uidGidMapper,
+		invalidateFunc:  invalidateFunc,
 	}
 }
 
@@ -70,6 +72,7 @@ func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath uti
 				// skip the unnecessary deletion
 				// leave the update to the following InsertEntry operation
 			} else {
+				glog.V(3).Infof("DeleteEntry %s/%s", oldPath, oldPath.Name())
 				if err := mc.localStore.DeleteEntry(ctx, oldPath); err != nil {
 					return err
 				}
@@ -82,6 +85,7 @@ func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath uti
 	if newEntry != nil {
 		newDir, _ := newEntry.DirAndName()
 		if mc.visitedBoundary.HasVisited(util.FullPath(newDir)) {
+			glog.V(3).Infof("InsertEntry %s/%s", newDir, newEntry.Name())
 			if err := mc.localStore.InsertEntry(ctx, newEntry); err != nil {
 				return err
 			}
diff --git a/weed/filesys/meta_cache/meta_cache_subscribe.go b/weed/filesys/meta_cache/meta_cache_subscribe.go
index 9b72cadcf..f9973f436 100644
--- a/weed/filesys/meta_cache/meta_cache_subscribe.go
+++ b/weed/filesys/meta_cache/meta_cache_subscribe.go
@@ -23,15 +23,15 @@ func SubscribeMetaEvents(mc *MetaCache, selfSignature int32, client filer_pb.Fil
 			}
 		}
 
+		dir := resp.Directory
 		var oldPath util.FullPath
 		var newEntry *filer.Entry
 		if message.OldEntry != nil {
-			oldPath = util.NewFullPath(resp.Directory, message.OldEntry.Name)
+			oldPath = util.NewFullPath(dir, message.OldEntry.Name)
 			glog.V(4).Infof("deleting %v", oldPath)
 		}
 
 		if message.NewEntry != nil {
-			dir := resp.Directory
 			if message.NewParentPath != "" {
 				dir = message.NewParentPath
 			}
@@ -39,7 +39,14 @@ func SubscribeMetaEvents(mc *MetaCache, selfSignature int32, client filer_pb.Fil
 			glog.V(4).Infof("creating %v", key)
 			newEntry = filer.FromPbEntry(dir, message.NewEntry)
 		}
-		return mc.AtomicUpdateEntryFromFiler(context.Background(), oldPath, newEntry)
+		err := mc.AtomicUpdateEntryFromFiler(context.Background(), oldPath, newEntry)
+		if err == nil && message.OldEntry != nil && message.NewEntry != nil {
+			key := util.NewFullPath(dir, message.NewEntry.Name)
+			mc.invalidateFunc(key)
+		}
+
+		return err
+
 	}
 
 	for {
diff --git a/weed/filesys/wfs.go b/weed/filesys/wfs.go
index 265fc95a8..759e21b15 100644
--- a/weed/filesys/wfs.go
+++ b/weed/filesys/wfs.go
@@ -92,7 +92,14 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 		wfs.chunkCache = chunk_cache.NewTieredChunkCache(256, cacheDir, option.CacheSizeMB, 1024*1024)
 	}
 
-	wfs.metaCache = meta_cache.NewMetaCache(path.Join(cacheDir, "meta"), util.FullPath(option.FilerMountRootPath), option.UidGidMapper)
+	wfs.metaCache = meta_cache.NewMetaCache(path.Join(cacheDir, "meta"), util.FullPath(option.FilerMountRootPath), option.UidGidMapper, func(filePath util.FullPath) {
+		fsNode := wfs.fsNodeCache.GetFsNode(filePath)
+		if fsNode != nil {
+			if file, ok := fsNode.(*File); ok {
+				file.entry = nil
+			}
+		}
+	})
 	startTime := time.Now()
 	go meta_cache.SubscribeMetaEvents(wfs.metaCache, wfs.signature, wfs, wfs.option.FilerMountRootPath, startTime.UnixNano())
 	grace.OnInterrupt(func() {
@@ -119,10 +126,12 @@ func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (fileHandle *FileHand
 	defer wfs.handlesLock.Unlock()
 
 	inodeId := file.fullpath().AsInode()
-	existingHandle, found := wfs.handles[inodeId]
-	if found && existingHandle != nil {
-		file.isOpen++
-		return existingHandle
+	if file.isOpen > 0 {
+		existingHandle, found := wfs.handles[inodeId]
+		if found && existingHandle != nil {
+			file.isOpen++
+			return existingHandle
+		}
 	}
 
 	fileHandle = newFileHandle(file, uid, gid)
diff --git a/weed/filesys/wfs_write.go b/weed/filesys/wfs_write.go
index 27b2297ed..83e40e7f5 100644
--- a/weed/filesys/wfs_write.go
+++ b/weed/filesys/wfs_write.go
@@ -10,9 +10,10 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
-func (wfs *WFS) saveDataAsChunk(dir string) filer.SaveDataAsChunkFunctionType {
+func (wfs *WFS) saveDataAsChunk(fullPath util.FullPath) filer.SaveDataAsChunkFunctionType {
 
 	return func(reader io.Reader, filename string, offset int64) (chunk *filer_pb.FileChunk, collection, replication string, err error) {
 		var fileId, host string
@@ -26,7 +27,7 @@ func (wfs *WFS) saveDataAsChunk(dir string) filer.SaveDataAsChunkFunctionType {
 				Collection:  wfs.option.Collection,
 				TtlSec:      wfs.option.TtlSec,
 				DataCenter:  wfs.option.DataCenter,
-				ParentPath:  dir,
+				Path:        string(fullPath),
 			}
 
 			resp, err := client.AssignVolume(context.Background(), request)
diff --git a/weed/operation/upload_content.go b/weed/operation/upload_content.go
index 9eb05f6e1..a4148cb22 100644
--- a/weed/operation/upload_content.go
+++ b/weed/operation/upload_content.go
@@ -19,6 +19,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/valyala/bytebufferpool"
 )
 
 type UploadResult struct {
@@ -80,11 +81,14 @@ func doUpload(uploadUrl string, filename string, cipher bool, reader io.Reader,
 	if ok {
 		data = bytesReader.Bytes
 	} else {
-		data, err = ioutil.ReadAll(reader)
+		buf := bytebufferpool.Get()
+		_, err = buf.ReadFrom(reader)
+		defer bytebufferpool.Put(buf)
 		if err != nil {
 			err = fmt.Errorf("read input: %v", err)
 			return
 		}
+		data = buf.Bytes()
 	}
 	uploadResult, uploadErr := retriedUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
 	return uploadResult, uploadErr, data
@@ -115,7 +119,7 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 		}
 		if shouldBeCompressed, iAmSure := util.IsCompressableFileType(filepath.Base(filename), mtype); iAmSure && shouldBeCompressed {
 			shouldGzipNow = true
-		} else if !iAmSure && mtype == "" && len(data) > 128 {
+		} else if !iAmSure && mtype == "" && len(data) > 16*1024 {
 			var compressed []byte
 			compressed, err = util.GzipData(data[0:128])
 			shouldGzipNow = len(compressed)*10 < 128*9 // can not compress to less than 90%
@@ -184,8 +188,9 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 }
 
 func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error, filename string, isGzipped bool, originalDataSize int, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (*UploadResult, error) {
-	body_buf := bytes.NewBufferString("")
-	body_writer := multipart.NewWriter(body_buf)
+	buf := bytebufferpool.Get()
+	defer bytebufferpool.Put(buf)
+	body_writer := multipart.NewWriter(buf)
 	h := make(textproto.MIMEHeader)
 	h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="file"; filename="%s"`, fileNameEscaper.Replace(filename)))
 	if mtype == "" {
@@ -213,7 +218,7 @@ func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error
 		return nil, err
 	}
 
-	req, postErr := http.NewRequest("POST", uploadUrl, body_buf)
+	req, postErr := http.NewRequest("POST", uploadUrl, bytes.NewReader(buf.Bytes()))
 	if postErr != nil {
 		glog.V(1).Infof("create upload request %s: %v", uploadUrl, postErr)
 		return nil, fmt.Errorf("create upload request %s: %v", uploadUrl, postErr)
@@ -225,12 +230,14 @@ func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error
 	if jwt != "" {
 		req.Header.Set("Authorization", "BEARER "+string(jwt))
 	}
+	// print("+")
 	resp, post_err := HttpClient.Do(req)
 	if post_err != nil {
 		glog.Errorf("upload %s %d bytes to %v: %v", filename, originalDataSize, uploadUrl, post_err)
 		debug.PrintStack()
 		return nil, fmt.Errorf("upload %s %d bytes to %v: %v", filename, originalDataSize, uploadUrl, post_err)
 	}
+	// print("-")
 	defer util.CloseResponse(resp)
 
 	var ret UploadResult
diff --git a/weed/pb/filer.proto b/weed/pb/filer.proto
index 40a46b33f..11c29e6ec 100644
--- a/weed/pb/filer.proto
+++ b/weed/pb/filer.proto
@@ -217,7 +217,7 @@ message AssignVolumeRequest {
     string replication = 3;
     int32 ttl_sec = 4;
     string data_center = 5;
-    string parent_path = 6;
+    string path = 6;
     string rack = 7;
 }
 
diff --git a/weed/pb/filer_pb/filer.pb.go b/weed/pb/filer_pb/filer.pb.go
index 36d35eb8b..3d54ea2c9 100644
--- a/weed/pb/filer_pb/filer.pb.go
+++ b/weed/pb/filer_pb/filer.pb.go
@@ -1480,7 +1480,7 @@ type AssignVolumeRequest struct {
 	Replication string `protobuf:"bytes,3,opt,name=replication,proto3" json:"replication,omitempty"`
 	TtlSec      int32  `protobuf:"varint,4,opt,name=ttl_sec,json=ttlSec,proto3" json:"ttl_sec,omitempty"`
 	DataCenter  string `protobuf:"bytes,5,opt,name=data_center,json=dataCenter,proto3" json:"data_center,omitempty"`
-	ParentPath  string `protobuf:"bytes,6,opt,name=parent_path,json=parentPath,proto3" json:"parent_path,omitempty"`
+	Path        string `protobuf:"bytes,6,opt,name=path,proto3" json:"path,omitempty"`
 	Rack        string `protobuf:"bytes,7,opt,name=rack,proto3" json:"rack,omitempty"`
 }
 
@@ -1551,9 +1551,9 @@ func (x *AssignVolumeRequest) GetDataCenter() string {
 	return ""
 }
 
-func (x *AssignVolumeRequest) GetParentPath() string {
+func (x *AssignVolumeRequest) GetPath() string {
 	if x != nil {
-		return x.ParentPath
+		return x.Path
 	}
 	return ""
 }
@@ -3259,7 +3259,7 @@ var file_filer_proto_rawDesc = []byte{
 	0x65, 0x77, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x6e,
 	0x65, 0x77, 0x4e, 0x61, 0x6d, 0x65, 0x22, 0x1b, 0x0a, 0x19, 0x41, 0x74, 0x6f, 0x6d, 0x69, 0x63,
 	0x52, 0x65, 0x6e, 0x61, 0x6d, 0x65, 0x45, 0x6e, 0x74, 0x72, 0x79, 0x52, 0x65, 0x73, 0x70, 0x6f,
-	0x6e, 0x73, 0x65, 0x22, 0xdc, 0x01, 0x0a, 0x13, 0x41, 0x73, 0x73, 0x69, 0x67, 0x6e, 0x56, 0x6f,
+	0x6e, 0x73, 0x65, 0x22, 0xcf, 0x01, 0x0a, 0x13, 0x41, 0x73, 0x73, 0x69, 0x67, 0x6e, 0x56, 0x6f,
 	0x6c, 0x75, 0x6d, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x14, 0x0a, 0x05, 0x63,
 	0x6f, 0x75, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x05, 0x63, 0x6f, 0x75, 0x6e,
 	0x74, 0x12, 0x1e, 0x0a, 0x0a, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x18,
@@ -3269,279 +3269,279 @@ var file_filer_proto_rawDesc = []byte{
 	0x69, 0x6f, 0x6e, 0x12, 0x17, 0x0a, 0x07, 0x74, 0x74, 0x6c, 0x5f, 0x73, 0x65, 0x63, 0x18, 0x04,
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-	0x05, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x12, 0x16, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70,
-	0x62, 0x2e, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x17,
-	0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x52,
-	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x3a, 0x0a, 0x05, 0x4b, 0x76, 0x50,
-	0x75, 0x74, 0x12, 0x16, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76,
-	0x50, 0x75, 0x74, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x17, 0x2e, 0x66, 0x69, 0x6c,
-	0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x50, 0x75, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f,
-	0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x4f, 0x0a, 0x10, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64,
-	0x66, 0x73, 0x2e, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x42, 0x0a, 0x46, 0x69, 0x6c, 0x65, 0x72,
-	0x50, 0x72, 0x6f, 0x74, 0x6f, 0x5a, 0x2f, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f,
-	0x6d, 0x2f, 0x63, 0x68, 0x72, 0x69, 0x73, 0x6c, 0x75, 0x73, 0x66, 0x2f, 0x73, 0x65, 0x61, 0x77,
-	0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x77, 0x65, 0x65, 0x64, 0x2f, 0x70, 0x62, 0x2f, 0x66, 0x69,
-	0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x64, 0x61, 0x74, 0x61, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x30, 0x01,
+	0x12, 0x65, 0x0a, 0x16, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62, 0x65, 0x4c, 0x6f, 0x63,
+	0x61, 0x6c, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x12, 0x22, 0x2e, 0x66, 0x69, 0x6c,
+	0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62, 0x65, 0x4d,
+	0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x23,
+	0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72,
+	0x69, 0x62, 0x65, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x52, 0x65, 0x73, 0x70, 0x6f,
+	0x6e, 0x73, 0x65, 0x22, 0x00, 0x30, 0x01, 0x12, 0x56, 0x0a, 0x0d, 0x4b, 0x65, 0x65, 0x70, 0x43,
+	0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65, 0x64, 0x12, 0x1e, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72,
+	0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x65, 0x65, 0x70, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65,
+	0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1f, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72,
+	0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x65, 0x65, 0x70, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65,
+	0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x28, 0x01, 0x30, 0x01, 0x12,
+	0x4f, 0x0a, 0x0c, 0x4c, 0x6f, 0x63, 0x61, 0x74, 0x65, 0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x12,
+	0x1d, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4c, 0x6f, 0x63, 0x61, 0x74,
+	0x65, 0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1e,
+	0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4c, 0x6f, 0x63, 0x61, 0x74, 0x65,
+	0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00,
+	0x12, 0x3a, 0x0a, 0x05, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x12, 0x16, 0x2e, 0x66, 0x69, 0x6c, 0x65,
+	0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73,
+	0x74, 0x1a, 0x17, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x47,
+	0x65, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x3a, 0x0a, 0x05,
+	0x4b, 0x76, 0x50, 0x75, 0x74, 0x12, 0x16, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62,
+	0x2e, 0x4b, 0x76, 0x50, 0x75, 0x74, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x17, 0x2e,
+	0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x50, 0x75, 0x74, 0x52, 0x65,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x4f, 0x0a, 0x10, 0x73, 0x65, 0x61, 0x77,
+	0x65, 0x65, 0x64, 0x66, 0x73, 0x2e, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x42, 0x0a, 0x46, 0x69,
+	0x6c, 0x65, 0x72, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x5a, 0x2f, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
+	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x68, 0x72, 0x69, 0x73, 0x6c, 0x75, 0x73, 0x66, 0x2f, 0x73,
+	0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x77, 0x65, 0x65, 0x64, 0x2f, 0x70, 0x62,
+	0x2f, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
 }
 
 var (
diff --git a/weed/replication/sink/filersink/fetch_write.go b/weed/replication/sink/filersink/fetch_write.go
index 98330da6b..d193ff81c 100644
--- a/weed/replication/sink/filersink/fetch_write.go
+++ b/weed/replication/sink/filersink/fetch_write.go
@@ -15,7 +15,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/security"
 )
 
-func (fs *FilerSink) replicateChunks(sourceChunks []*filer_pb.FileChunk, dir string) (replicatedChunks []*filer_pb.FileChunk, err error) {
+func (fs *FilerSink) replicateChunks(sourceChunks []*filer_pb.FileChunk, path string) (replicatedChunks []*filer_pb.FileChunk, err error) {
 	if len(sourceChunks) == 0 {
 		return
 	}
@@ -27,7 +27,7 @@ func (fs *FilerSink) replicateChunks(sourceChunks []*filer_pb.FileChunk, dir str
 		wg.Add(1)
 		go func(chunk *filer_pb.FileChunk, index int) {
 			defer wg.Done()
-			replicatedChunk, e := fs.replicateOneChunk(chunk, dir)
+			replicatedChunk, e := fs.replicateOneChunk(chunk, path)
 			if e != nil {
 				err = e
 			}
@@ -39,9 +39,9 @@ func (fs *FilerSink) replicateChunks(sourceChunks []*filer_pb.FileChunk, dir str
 	return
 }
 
-func (fs *FilerSink) replicateOneChunk(sourceChunk *filer_pb.FileChunk, dir string) (*filer_pb.FileChunk, error) {
+func (fs *FilerSink) replicateOneChunk(sourceChunk *filer_pb.FileChunk, path string) (*filer_pb.FileChunk, error) {
 
-	fileId, err := fs.fetchAndWrite(sourceChunk, dir)
+	fileId, err := fs.fetchAndWrite(sourceChunk, path)
 	if err != nil {
 		return nil, fmt.Errorf("copy %s: %v", sourceChunk.GetFileIdString(), err)
 	}
@@ -58,7 +58,7 @@ func (fs *FilerSink) replicateOneChunk(sourceChunk *filer_pb.FileChunk, dir stri
 	}, nil
 }
 
-func (fs *FilerSink) fetchAndWrite(sourceChunk *filer_pb.FileChunk, dir string) (fileId string, err error) {
+func (fs *FilerSink) fetchAndWrite(sourceChunk *filer_pb.FileChunk, path string) (fileId string, err error) {
 
 	filename, header, resp, err := fs.filerSource.ReadPart(sourceChunk.GetFileIdString())
 	if err != nil {
@@ -77,7 +77,7 @@ func (fs *FilerSink) fetchAndWrite(sourceChunk *filer_pb.FileChunk, dir string)
 			Collection:  fs.collection,
 			TtlSec:      fs.ttlSec,
 			DataCenter:  fs.dataCenter,
-			ParentPath:  dir,
+			Path:        path,
 		}
 
 		resp, err := client.AssignVolume(context.Background(), request)
diff --git a/weed/replication/sink/filersink/filer_sink.go b/weed/replication/sink/filersink/filer_sink.go
index f1d8ff840..6f467ea58 100644
--- a/weed/replication/sink/filersink/filer_sink.go
+++ b/weed/replication/sink/filersink/filer_sink.go
@@ -96,7 +96,7 @@ func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry, signatures [
 			}
 		}
 
-		replicatedChunks, err := fs.replicateChunks(entry.Chunks, dir)
+		replicatedChunks, err := fs.replicateChunks(entry.Chunks, key)
 
 		if err != nil {
 			// only warning here since the source chunk may have been deleted already
@@ -180,7 +180,7 @@ func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParent
 		}
 
 		// replicate the chunks that are new in the source
-		replicatedChunks, err := fs.replicateChunks(newChunks, newParentPath)
+		replicatedChunks, err := fs.replicateChunks(newChunks, key)
 		if err != nil {
 			return true, fmt.Errorf("replicte %s chunks error: %v", key, err)
 		}
diff --git a/weed/replication/sink/s3sink/s3_write.go b/weed/replication/sink/s3sink/s3_write.go
index 45265d1ba..b172ea2c3 100644
--- a/weed/replication/sink/s3sink/s3_write.go
+++ b/weed/replication/sink/s3sink/s3_write.go
@@ -163,7 +163,7 @@ func (s3sink *S3Sink) buildReadSeeker(chunk *filer.ChunkView) (io.ReadSeeker, er
 	}
 	buf := make([]byte, chunk.Size)
 	for _, fileUrl := range fileUrls {
-		_, err = util.ReadUrl(fileUrl, nil, false, false, chunk.Offset, int(chunk.Size), buf)
+		_, err = util.ReadUrl(fileUrl+"?readDeleted=true", nil, false, false, chunk.Offset, int(chunk.Size), buf)
 		if err != nil {
 			glog.V(1).Infof("read from %s: %v", fileUrl, err)
 		} else {
diff --git a/weed/s3api/s3api_bucket_handlers.go b/weed/s3api/s3api_bucket_handlers.go
index d8f4812ea..ab48b19c1 100644
--- a/weed/s3api/s3api_bucket_handlers.go
+++ b/weed/s3api/s3api_bucket_handlers.go
@@ -67,7 +67,7 @@ func (s3a *S3ApiServer) PutBucketHandler(w http.ResponseWriter, r *http.Request)
 		}); err != nil {
 			glog.Errorf("list collection: %v", err)
 			return fmt.Errorf("list collections: %v", err)
-		}else {
+		} else {
 			for _, c := range resp.Collections {
 				if bucket == c.Name {
 					errCode = s3err.ErrBucketAlreadyExists
diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index d6dddf911..8f326f5c7 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -152,7 +152,7 @@ func (fs *FilerServer) lookupFileId(fileId string) (targetUrls []string, err err
 
 func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntryRequest) (resp *filer_pb.CreateEntryResponse, err error) {
 
-	glog.V(4).Infof("CreateEntry %v", req)
+	glog.V(4).Infof("CreateEntry %v/%v", req.Directory, req.Entry.Name)
 
 	resp = &filer_pb.CreateEntryResponse{}
 
@@ -327,7 +327,7 @@ func (fs *FilerServer) AssignVolume(ctx context.Context, req *filer_pb.AssignVol
 	if req.TtlSec > 0 {
 		ttlStr = strconv.Itoa(int(req.TtlSec))
 	}
-	collection, replication, _ := fs.detectCollection(req.ParentPath, req.Collection, req.Replication)
+	collection, replication, _ := fs.detectCollection(req.Path, req.Collection, req.Replication)
 
 	var altRequest *operation.VolumeAssignRequest
 
diff --git a/weed/server/master_ui/templates.go b/weed/server/master_ui/templates.go
index 7189064d0..60873f6aa 100644
--- a/weed/server/master_ui/templates.go
+++ b/weed/server/master_ui/templates.go
@@ -88,7 +88,11 @@ var StatusTpl = template.Must(template.New("status").Parse(`<!DOCTYPE html>
             <tr>
               <td><code>{{ $dc.Id }}</code></td>
               <td>{{ $rack.Id }}</td>
-              <td><a href="http://{{ $dn.Url }}/ui/index.html">{{ $dn.Url }}</a></td>
+              <td><a href="http://{{ $dn.Url }}/ui/index.html">{{ $dn.Url }}</a> 
+                {{ if ne $dn.PublicUrl $dn.Url }}
+					/ <a href="http://{{ $dn.PublicUrl }}/ui/index.html">{{ $dn.PublicUrl }}</a> 
+                {{ end }}
+			  </td>
               <td>{{ $dn.Volumes }}</td>
               <td>{{ $dn.VolumeIds}}</td>
               <td>{{ $dn.EcShards }}</td>
diff --git a/weed/server/raft_server.go b/weed/server/raft_server.go
index 073c1ff16..85841e409 100644
--- a/weed/server/raft_server.go
+++ b/weed/server/raft_server.go
@@ -2,6 +2,7 @@ package weed_server
 
 import (
 	"encoding/json"
+	"math/rand"
 	"os"
 	"path"
 	"sort"
@@ -50,7 +51,7 @@ func (s StateMachine) Recovery(data []byte) error {
 	return nil
 }
 
-func NewRaftServer(grpcDialOption grpc.DialOption, peers []string, serverAddr, dataDir string, topo *topology.Topology, pulseSeconds int, raftResumeState bool) (*RaftServer, error) {
+func NewRaftServer(grpcDialOption grpc.DialOption, peers []string, serverAddr, dataDir string, topo *topology.Topology, raftResumeState bool) (*RaftServer, error) {
 	s := &RaftServer{
 		peers:      peers,
 		serverAddr: serverAddr,
@@ -84,8 +85,8 @@ func NewRaftServer(grpcDialOption grpc.DialOption, peers []string, serverAddr, d
 		glog.V(0).Infoln(err)
 		return nil, err
 	}
-	s.raftServer.SetHeartbeatInterval(500 * time.Millisecond)
-	s.raftServer.SetElectionTimeout(time.Duration(pulseSeconds) * 500 * time.Millisecond)
+	s.raftServer.SetHeartbeatInterval(time.Duration(300+rand.Intn(150)) * time.Millisecond)
+	s.raftServer.SetElectionTimeout(10 * time.Second)
 	if err := s.raftServer.LoadSnapshot(); err != nil {
 		return nil, err
 	}
diff --git a/weed/server/webdav_server.go b/weed/server/webdav_server.go
index 86307c0cf..3e9f882e3 100644
--- a/weed/server/webdav_server.go
+++ b/weed/server/webdav_server.go
@@ -387,7 +387,7 @@ func (f *WebDavFile) Write(buf []byte) (int, error) {
 			Count:       1,
 			Replication: "",
 			Collection:  f.fs.option.Collection,
-			ParentPath:  dir,
+			Path:        f.name,
 		}
 
 		resp, err := client.AssignVolume(ctx, request)
diff --git a/weed/stats/metrics.go b/weed/stats/metrics.go
index 13ab3bae1..3f5d851a4 100644
--- a/weed/stats/metrics.go
+++ b/weed/stats/metrics.go
@@ -101,6 +101,14 @@ var (
 			Help:      "Actual disk size used by volumes.",
 		}, []string{"collection", "type"})
 
+	VolumeServerResourceGauge = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "volumeServer",
+			Name:      "resource",
+			Help:      "Resource usage",
+		}, []string{"name", "type"})
+
 	S3RequestCounter = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
 			Namespace: "SeaweedFS",
@@ -132,6 +140,7 @@ func init() {
 	Gather.MustRegister(VolumeServerMaxVolumeCounter)
 	Gather.MustRegister(VolumeServerReadOnlyVolumeGauge)
 	Gather.MustRegister(VolumeServerDiskSizeGauge)
+	Gather.MustRegister(VolumeServerResourceGauge)
 
 	Gather.MustRegister(S3RequestCounter)
 	Gather.MustRegister(S3RequestHistogram)
diff --git a/weed/storage/disk_location.go b/weed/storage/disk_location.go
index c309b3f92..ed57aa54b 100644
--- a/weed/storage/disk_location.go
+++ b/weed/storage/disk_location.go
@@ -305,6 +305,9 @@ func (l *DiskLocation) CheckDiskSpace() {
 	for {
 		if dir, e := filepath.Abs(l.Directory); e == nil {
 			s := stats.NewDiskStatus(dir)
+			stats.VolumeServerResourceGauge.WithLabelValues(l.Directory, "all").Set(float64(s.All))
+			stats.VolumeServerResourceGauge.WithLabelValues(l.Directory, "used").Set(float64(s.Used))
+			stats.VolumeServerResourceGauge.WithLabelValues(l.Directory, "free").Set(float64(s.Free))
 			if (s.PercentFree < l.MinFreeSpacePercent) != l.isDiskSpaceLow {
 				l.isDiskSpaceLow = !l.isDiskSpaceLow
 			}
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 72a388379..b9fcfcba9 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -206,11 +206,12 @@ func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 		maxVolumeCount = maxVolumeCount + location.MaxVolumeCount
 		location.volumesLock.RLock()
 		for _, v := range location.volumes {
-			if maxFileKey < v.MaxFileKey() {
-				maxFileKey = v.MaxFileKey()
+			curMaxFileKey, volumeMessage := v.ToVolumeInformationMessage()
+			if maxFileKey < curMaxFileKey {
+				maxFileKey = curMaxFileKey
 			}
-			if !v.expired(s.GetVolumeSizeLimit()) {
-				volumeMessages = append(volumeMessages, v.ToVolumeInformationMessage())
+			if !v.expired(volumeMessage.Size, s.GetVolumeSizeLimit()) {
+				volumeMessages = append(volumeMessages, volumeMessage)
 			} else {
 				if v.expiredLongEnough(MAX_TTL_VOLUME_REMOVAL_DELAY) {
 					deleteVids = append(deleteVids, v.Id)
@@ -218,10 +219,13 @@ func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 					glog.V(0).Infoln("volume", v.Id, "is expired.")
 				}
 			}
-			fileSize, _, _ := v.FileStat()
-			collectionVolumeSize[v.Collection] += fileSize
+			collectionVolumeSize[v.Collection] += volumeMessage.Size
 			if v.IsReadOnly() {
 				collectionVolumeReadOnlyCount[v.Collection] += 1
+			} else {
+				if _, exist := collectionVolumeReadOnlyCount[v.Collection]; !exist {
+					collectionVolumeReadOnlyCount[v.Collection] = 0
+				}
 			}
 		}
 		location.volumesLock.RUnlock()
diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index 2d46fbcdf..a7a963a59 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -178,12 +178,12 @@ func (v *Volume) NeedToReplicate() bool {
 // except when volume is empty
 // or when the volume does not have a ttl
 // or when volumeSizeLimit is 0 when server just starts
-func (v *Volume) expired(volumeSizeLimit uint64) bool {
+func (v *Volume) expired(contentSize uint64, volumeSizeLimit uint64) bool {
 	if volumeSizeLimit == 0 {
 		// skip if we don't know size limit
 		return false
 	}
-	if v.ContentSize() == 0 {
+	if contentSize <= super_block.SuperBlockSize {
 		return false
 	}
 	if v.Ttl == nil || v.Ttl.Minutes() == 0 {
@@ -214,16 +214,32 @@ func (v *Volume) expiredLongEnough(maxDelayMinutes uint32) bool {
 	return false
 }
 
-func (v *Volume) ToVolumeInformationMessage() *master_pb.VolumeInformationMessage {
-	size, _, modTime := v.FileStat()
+func (v *Volume) CollectStatus() (maxFileKey types.NeedleId, datFileSize int64, modTime time.Time, fileCount, deletedCount, deletedSize uint64) {
+	v.dataFileAccessLock.RLock()
+	defer v.dataFileAccessLock.RUnlock()
+	glog.V(3).Infof("CollectStatus volume %d", v.Id)
+
+	maxFileKey = v.nm.MaxFileKey()
+	datFileSize, modTime, _ = v.DataBackend.GetStat()
+	fileCount = uint64(v.nm.FileCount())
+	deletedCount = uint64(v.nm.DeletedCount())
+	deletedSize = v.nm.DeletedSize()
+	fileCount = uint64(v.nm.FileCount())
+
+	return
+}
+
+func (v *Volume) ToVolumeInformationMessage() (types.NeedleId, *master_pb.VolumeInformationMessage) {
+
+	maxFileKey, volumeSize, modTime, fileCount, deletedCount, deletedSize := v.CollectStatus()
 
-	volumInfo := &master_pb.VolumeInformationMessage{
+	volumeInfo := &master_pb.VolumeInformationMessage{
 		Id:               uint32(v.Id),
-		Size:             size,
+		Size:             uint64(volumeSize),
 		Collection:       v.Collection,
-		FileCount:        v.FileCount(),
-		DeleteCount:      v.DeletedCount(),
-		DeletedByteCount: v.DeletedSize(),
+		FileCount:        fileCount,
+		DeleteCount:      deletedCount,
+		DeletedByteCount: deletedSize,
 		ReadOnly:         v.IsReadOnly(),
 		ReplicaPlacement: uint32(v.ReplicaPlacement.Byte()),
 		Version:          uint32(v.Version()),
@@ -232,9 +248,9 @@ func (v *Volume) ToVolumeInformationMessage() *master_pb.VolumeInformationMessag
 		ModifiedAtSecond: modTime.Unix(),
 	}
 
-	volumInfo.RemoteStorageName, volumInfo.RemoteStorageKey = v.RemoteStorageNameKey()
+	volumeInfo.RemoteStorageName, volumeInfo.RemoteStorageKey = v.RemoteStorageNameKey()
 
-	return volumInfo
+	return maxFileKey, volumeInfo
 }
 
 func (v *Volume) RemoteStorageNameKey() (storageName, storageKey string) {
diff --git a/weed/storage/volume_read_write.go b/weed/storage/volume_read_write.go
index 10c87c8ea..94c1d0ea1 100644
--- a/weed/storage/volume_read_write.go
+++ b/weed/storage/volume_read_write.go
@@ -185,7 +185,7 @@ func (v *Volume) doWriteRequest(n *needle.Needle) (offset uint64, size Size, isU
 }
 
 func (v *Volume) syncDelete(n *needle.Needle) (Size, error) {
-	glog.V(4).Infof("delete needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
+	// glog.V(4).Infof("delete needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
 	actualSize := needle.GetActualSize(0, v.Version())
 	v.dataFileAccessLock.Lock()
 	defer v.dataFileAccessLock.Unlock()
diff --git a/weed/topology/volume_layout.go b/weed/topology/volume_layout.go
index dddcfc9c9..ffe36e95b 100644
--- a/weed/topology/volume_layout.go
+++ b/weed/topology/volume_layout.go
@@ -139,7 +139,7 @@ func (vl *VolumeLayout) RegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
 	vl.accessLock.Lock()
 	defer vl.accessLock.Unlock()
 
-	defer vl.ensureCorrectWritables(v)
+	defer vl.ensureCorrectWritables(v.Id)
 	defer vl.rememberOversizedVolume(v, dn)
 
 	if _, ok := vl.vid2location[v.Id]; !ok {
@@ -189,7 +189,7 @@ func (vl *VolumeLayout) UnRegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
 
 		vl.readonlyVolumes.Remove(v.Id, dn)
 		vl.oversizedVolumes.Remove(v.Id, dn)
-		vl.ensureCorrectWritables(v)
+		vl.ensureCorrectWritables(v.Id)
 
 		if location.Length() == 0 {
 			delete(vl.vid2location, v.Id)
@@ -202,19 +202,30 @@ func (vl *VolumeLayout) EnsureCorrectWritables(v *storage.VolumeInfo) {
 	vl.accessLock.Lock()
 	defer vl.accessLock.Unlock()
 
-	vl.ensureCorrectWritables(v)
+	vl.ensureCorrectWritables(v.Id)
 }
 
-func (vl *VolumeLayout) ensureCorrectWritables(v *storage.VolumeInfo) {
-	if vl.enoughCopies(v.Id) && vl.isWritable(v) {
-		if !vl.oversizedVolumes.IsTrue(v.Id) {
-			vl.setVolumeWritable(v.Id)
+func (vl *VolumeLayout) ensureCorrectWritables(vid needle.VolumeId) {
+	if vl.enoughCopies(vid) && vl.isAllWritable(vid) {
+		if !vl.oversizedVolumes.IsTrue(vid) {
+			vl.setVolumeWritable(vid)
 		}
 	} else {
-		vl.removeFromWritable(v.Id)
+		vl.removeFromWritable(vid)
 	}
 }
 
+func (vl *VolumeLayout) isAllWritable(vid needle.VolumeId) bool {
+	for _, dn := range vl.vid2location[vid].list {
+		if v, found := dn.volumes[vid]; found {
+			if v.ReadOnly {
+				return false
+			}
+		}
+	}
+	return true
+}
+
 func (vl *VolumeLayout) isOversized(v *storage.VolumeInfo) bool {
 	return uint64(v.Size) >= vl.volumeSizeLimit
 }
diff --git a/weed/util/config.go b/weed/util/config.go
index 7b6e92f08..6acf21c12 100644
--- a/weed/util/config.go
+++ b/weed/util/config.go
@@ -27,7 +27,11 @@ func LoadConfiguration(configFileName string, required bool) (loaded bool) {
 	glog.V(1).Infof("Reading %s.toml from %s", configFileName, viper.ConfigFileUsed())
 
 	if err := viper.MergeInConfig(); err != nil { // Handle errors reading the config file
-		glog.V(1).Infof("Reading %s: %v", viper.ConfigFileUsed(), err)
+		logLevel := glog.Level(0)
+		if strings.Contains(err.Error(), "Not Found") {
+			logLevel = 1
+		}
+		glog.V(logLevel).Infof("Reading %s: %v", viper.ConfigFileUsed(), err)
 		if required {
 			glog.Fatalf("Failed to load %s.toml file from current directory, or $HOME/.seaweedfs/, or /etc/seaweedfs/"+
 				"\n\nPlease use this command to generate the default %s.toml file\n"+
diff --git a/weed/util/constants.go b/weed/util/constants.go
index 5cfa58fbc..177c20a60 100644
--- a/weed/util/constants.go
+++ b/weed/util/constants.go
@@ -5,7 +5,7 @@ import (
 )
 
 var (
-	VERSION = fmt.Sprintf("%s %d.%02d", sizeLimit, 2, 05)
+	VERSION = fmt.Sprintf("%s %d.%02d", sizeLimit, 2, 07)
 	COMMIT  = ""
 )