filer: cross cluster synchronization

other/java/client/src/main/proto/filer.proto

@@ -58,6 +58,12 @@ service SeaweedFiler {
     rpc LocateBroker (LocateBrokerRequest) returns (LocateBrokerResponse) {
     }
 
+    rpc KvGet (KvGetRequest) returns (KvGetResponse) {
+    }
+
+    rpc KvPut (KvPutRequest) returns (KvPutResponse) {
+    }
+
 }
 
 //////////////////////////////////////////////////
@@ -308,3 +314,19 @@ message LocateBrokerResponse {
     }
     repeated Resource resources = 2;
 }
+
+// Key-Value operations
+message KvGetRequest {
+    bytes key = 1;
+}
+message KvGetResponse {
+    bytes value = 1;
+    string error = 2;
+}
+message KvPutRequest {
+    bytes key = 1;
+    bytes value = 2;
+}
+message KvPutResponse {
+    string error = 1;
+}

weed/command/command.go

@@ -16,6 +16,7 @@ var Commands = []*Command{
 	cmdExport,
 	cmdFiler,
 	cmdFilerReplicate,
+	cmdFilerSynchronize,
 	cmdFix,
 	cmdMaster,
 	cmdMount,

weed/command/filer_copy.go

@@ -72,7 +72,7 @@ var cmdCopy = &Command{
 
   If "maxMB" is set to a positive number, files larger than it would be split into chunks.
 
-  `,
+`,
 }
 
 func runCopy(cmd *Command, args []string) bool {

weed/command/filer_sync.go

@@ -0,0 +1,329 @@
+package command
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/replication"
+	"github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
+	"github.com/chrislusf/seaweedfs/weed/replication/source"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"google.golang.org/grpc"
+	"io"
+	"strings"
+	"time"
+)
+
+type SyncOptions struct {
+	isActivePassive *bool
+	filerA          *string
+	filerB          *string
+	aPath           *string
+	bPath           *string
+	aReplication    *string
+	bReplication    *string
+	aCollection     *string
+	bCollection     *string
+	aTtlSec         *int
+	bTtlSec         *int
+	aDebug          *bool
+	bDebug          *bool
+}
+
+var (
+	syncOptions SyncOptions
+)
+
+func init() {
+	cmdFilerSynchronize.Run = runFilerSynchronize // break init cycle
+	syncOptions.isActivePassive = cmdFilerSynchronize.Flag.Bool("isActivePassive", false, "one directional follow if true")
+	syncOptions.filerA = cmdFilerSynchronize.Flag.String("a", "", "filer A in one SeaweedFS cluster")
+	syncOptions.filerB = cmdFilerSynchronize.Flag.String("b", "", "filer B in the other SeaweedFS cluster")
+	syncOptions.aPath = cmdFilerSynchronize.Flag.String("a.path", "/", "directory to sync on filer A")
+	syncOptions.bPath = cmdFilerSynchronize.Flag.String("b.path", "/", "directory to sync on filer B")
+	syncOptions.aReplication = cmdFilerSynchronize.Flag.String("a.replication", "", "replication on filer A")
+	syncOptions.bReplication = cmdFilerSynchronize.Flag.String("b.replication", "", "replication on filer B")
+	syncOptions.aCollection = cmdFilerSynchronize.Flag.String("a.collection", "", "collection on filer A")
+	syncOptions.bCollection = cmdFilerSynchronize.Flag.String("b.collection", "", "collection on filer B")
+	syncOptions.aTtlSec = cmdFilerSynchronize.Flag.Int("a.ttlSec", 0, "ttl in seconds on filer A")
+	syncOptions.bTtlSec = cmdFilerSynchronize.Flag.Int("b.ttlSec", 0, "ttl in seconds on filer B")
+	syncOptions.aDebug = cmdFilerSynchronize.Flag.Bool("a.debug", false, "debug mode to print out filer A received files")
+	syncOptions.bDebug = cmdFilerSynchronize.Flag.Bool("b.debug", false, "debug mode to print out filer B received files")
+}
+
+var cmdFilerSynchronize = &Command{
+	UsageLine: "filer.sync -a=<oneFilerHost>:<oneFilerPort> -b=<otherFilerHost>:<otherFilerPort>",
+	Short:     "continuously synchronize between two active-active or active-passive SeaweedFS clusters",
+	Long: `continuously synchronize file changes between two active-active or active-passive filers
+
+	filer.sync listens on filer notifications. If any file is updated, it will fetch the updated content,
+	and write to the other destination. Different from filer.replicate:
+
+	* filer.sync only works between two filers.
+	* filer.sync does not need any special message queue setup.
+	* filer.sync supports both active-active and active-passive modes.
+	
+	If restarted, the synchronization will resume from the previous checkpoints, persisted every minute.
+
+`,
+}
+
+func runFilerSynchronize(cmd *Command, args []string) bool {
+
+	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
+
+	go func() {
+		for {
+			err := doSubscribeFilerMetaChanges(grpcDialOption, *syncOptions.filerA, *syncOptions.aPath, *syncOptions.filerB,
+				*syncOptions.bPath, *syncOptions.bReplication, *syncOptions.bCollection, *syncOptions.bTtlSec, *syncOptions.bDebug)
+			if err != nil {
+				glog.Errorf("sync from %s to %s: %v", *syncOptions.filerA, *syncOptions.filerB, err)
+				time.Sleep(1747 * time.Millisecond)
+			}
+		}
+	}()
+
+	if !*syncOptions.isActivePassive {
+		go func() {
+			for {
+				err := doSubscribeFilerMetaChanges(grpcDialOption, *syncOptions.filerB, *syncOptions.bPath, *syncOptions.filerA,
+					*syncOptions.aPath, *syncOptions.aReplication, *syncOptions.aCollection, *syncOptions.aTtlSec, *syncOptions.aDebug)
+				if err != nil {
+					glog.Errorf("sync from %s to %s: %v", *syncOptions.filerB, *syncOptions.filerA, err)
+					time.Sleep(2147 * time.Millisecond)
+				}
+			}
+		}()
+	}
+
+	select {}
+
+	return true
+}
+
+func doSubscribeFilerMetaChanges(grpcDialOption grpc.DialOption, sourceFiler, sourcePath, targetFiler, targetPath string,
+	replicationStr, collection string, ttlSec int, debug bool) error {
+
+	// read source filer signature
+	sourceFilerSignature, sourceErr := replication.ReadFilerSignature(grpcDialOption, sourceFiler)
+	if sourceErr != nil {
+		return sourceErr
+	}
+	// read target filer signature
+	targetFilerSignature, targetErr := replication.ReadFilerSignature(grpcDialOption, targetFiler)
+	if targetErr != nil {
+		return targetErr
+	}
+
+	// if first time, start from now
+	// if has previously synced, resume from that point of time
+	sourceFilerOffsetTsNs, err := readSyncOffset(grpcDialOption, targetFiler, sourceFilerSignature)
+	if err != nil {
+		return err
+	}
+
+	glog.V(0).Infof("start sync %s(%d) => %s(%d) from %v(%d)", sourceFiler, sourceFilerSignature, targetFiler, targetFilerSignature, time.Unix(0, sourceFilerOffsetTsNs), sourceFilerOffsetTsNs)
+
+	// create filer sink
+	filerSource := &source.FilerSource{}
+	filerSource.DoInitialize(pb.ServerToGrpcAddress(sourceFiler), sourcePath)
+	filerSink := &filersink.FilerSink{}
+	filerSink.DoInitialize(pb.ServerToGrpcAddress(targetFiler), targetPath, replicationStr, collection, ttlSec, grpcDialOption)
+	filerSink.SetSourceFiler(filerSource)
+
+	processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
+		message := resp.EventNotification
+
+		var sourceOldKey, sourceNewKey util.FullPath
+		if message.OldEntry != nil {
+			sourceOldKey = util.FullPath(resp.Directory).Child(message.OldEntry.Name)
+		}
+		if message.NewEntry != nil {
+			sourceNewKey = util.FullPath(message.NewParentPath).Child(message.NewEntry.Name)
+		}
+
+		for _, sig := range message.Signatures {
+			if sig == targetFilerSignature && targetFilerSignature != 0 {
+				fmt.Printf("%s skipping %s change to %v\n", targetFiler, sourceFiler, message)
+				return nil
+			}
+		}
+		if debug {
+			fmt.Printf("%s check %s change %s,%s sig %v, target sig: %v\n", targetFiler, sourceFiler, sourceOldKey, sourceNewKey, message.Signatures, targetFilerSignature)
+		}
+
+		if !strings.HasPrefix(resp.Directory, sourcePath) {
+			return nil
+		}
+
+		// handle deletions
+		if message.OldEntry != nil && message.NewEntry == nil {
+			if !strings.HasPrefix(string(sourceOldKey), sourcePath) {
+				return nil
+			}
+			key := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
+			return filerSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
+		}
+
+		// handle new entries
+		if message.OldEntry == nil && message.NewEntry != nil {
+			if !strings.HasPrefix(string(sourceNewKey), sourcePath) {
+				return nil
+			}
+			key := util.Join(targetPath, string(sourceNewKey)[len(sourcePath):])
+			return filerSink.CreateEntry(key, message.NewEntry, message.Signatures)
+		}
+
+		// this is something special?
+		if message.OldEntry == nil && message.NewEntry == nil {
+			return nil
+		}
+
+		// handle updates
+		if strings.HasPrefix(string(sourceOldKey), sourcePath) {
+			// old key is in the watched directory
+			if strings.HasPrefix(string(sourceNewKey), sourcePath) {
+				// new key is also in the watched directory
+				oldKey := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
+				message.NewParentPath = util.Join(targetPath, message.NewParentPath[len(sourcePath):])
+				foundExisting, err := filerSink.UpdateEntry(string(oldKey), message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks, message.Signatures)
+				if foundExisting {
+					return err
+				}
+
+				// not able to find old entry
+				if err = filerSink.DeleteEntry(string(oldKey), message.OldEntry.IsDirectory, false, message.Signatures); err != nil {
+					return fmt.Errorf("delete old entry %v: %v", oldKey, err)
+				}
+
+				// create the new entry
+				newKey := util.Join(targetPath, string(sourceNewKey)[len(sourcePath):])
+				return filerSink.CreateEntry(newKey, message.NewEntry, message.Signatures)
+
+			} else {
+				// new key is outside of the watched directory
+				key := util.Join(targetPath, string(sourceOldKey)[len(sourcePath):])
+				return filerSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
+			}
+		} else {
+			// old key is outside of the watched directory
+			if strings.HasPrefix(string(sourceNewKey), sourcePath) {
+				// new key is in the watched directory
+				key := util.Join(targetPath, string(sourceNewKey)[len(sourcePath):])
+				return filerSink.CreateEntry(key, message.NewEntry, message.Signatures)
+			} else {
+				// new key is also outside of the watched directory
+				// skip
+			}
+		}
+
+		return nil
+	}
+
+	return pb.WithFilerClient(sourceFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+
+		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
+			ClientName: "syncTo_" + targetFiler,
+			PathPrefix: sourcePath,
+			SinceNs:    sourceFilerOffsetTsNs,
+			Signature:  targetFilerSignature,
+		})
+		if err != nil {
+			return fmt.Errorf("listen: %v", err)
+		}
+
+		var counter int64
+		var lastWriteTime time.Time
+		for {
+			resp, listenErr := stream.Recv()
+			if listenErr == io.EOF {
+				return nil
+			}
+			if listenErr != nil {
+				return listenErr
+			}
+
+			if err := processEventFn(resp); err != nil {
+				return err
+			}
+
+			counter++
+			if lastWriteTime.Add(3 * time.Second).Before(time.Now()) {
+				glog.V(0).Infof("sync %s => %s progressed to %v %0.2f/sec", sourceFiler, targetFiler, time.Unix(0, resp.TsNs), float64(counter)/float64(3))
+				counter = 0
+				lastWriteTime = time.Now()
+				if err := writeSyncOffset(grpcDialOption, targetFiler, sourceFilerSignature, resp.TsNs); err != nil {
+					return err
+				}
+			}
+
+		}
+
+	})
+
+}
+
+const (
+	SyncKeyPrefix = "sync."
+)
+
+func readSyncOffset(grpcDialOption grpc.DialOption, filer string, filerSignature int32) (lastOffsetTsNs int64, readErr error) {
+
+	readErr = pb.WithFilerClient(filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		syncKey := []byte(SyncKeyPrefix + "____")
+		util.Uint32toBytes(syncKey[len(SyncKeyPrefix):len(SyncKeyPrefix)+4], uint32(filerSignature))
+
+		resp, err := client.KvGet(context.Background(), &filer_pb.KvGetRequest{Key: syncKey})
+		if err != nil {
+			return err
+		}
+
+		if len(resp.Error) != 0 {
+			return errors.New(resp.Error)
+		}
+		if len(resp.Value) < 8 {
+			return nil
+		}
+
+		lastOffsetTsNs = int64(util.BytesToUint64(resp.Value))
+
+		return nil
+	})
+
+	return
+
+}
+
+func writeSyncOffset(grpcDialOption grpc.DialOption, filer string, filerSignature int32, offsetTsNs int64) error {
+	return pb.WithFilerClient(filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+
+		syncKey := []byte(SyncKeyPrefix + "____")
+		util.Uint32toBytes(syncKey[len(SyncKeyPrefix):len(SyncKeyPrefix)+4], uint32(filerSignature))
+
+		valueBuf := make([]byte, 8)
+		util.Uint64toBytes(valueBuf, uint64(offsetTsNs))
+
+		resp, err := client.KvPut(context.Background(), &filer_pb.KvPutRequest{
+			Key:   syncKey,
+			Value: valueBuf,
+		})
+		if err != nil {
+			return err
+		}
+
+		if len(resp.Error) != 0 {
+			return errors.New(resp.Error)
+		}
+
+		return nil
+
+	})
+
+}

weed/command/watch.go

@@ -78,7 +78,10 @@ func runWatch(cmd *Command, args []string) bool {
 
 	watchErr := pb.WithFilerClient(*watchFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 
-		stream, err := client.SubscribeMetadata(context.Background(), &filer_pb.SubscribeMetadataRequest{
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+
+		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
 			ClientName: "watch",
 			PathPrefix: *watchTarget,
 			SinceNs:    time.Now().Add(-*watchStart).UnixNano(),

weed/filer/filechunks.go

@@ -226,6 +226,11 @@ func NonOverlappingVisibleIntervals(lookupFileIdFn LookupFileIdFunctionType, chu
 
 	sort.Slice(chunks, func(i, j int) bool {
 		if chunks[i].Mtime == chunks[j].Mtime {
+			filer_pb.EnsureFid(chunks[i])
+			filer_pb.EnsureFid(chunks[j])
+			if chunks[i].Fid == nil || chunks[j].Fid == nil {
+				return true
+			}
 			return chunks[i].Fid.FileKey < chunks[j].Fid.FileKey
 		}
 		return chunks[i].Mtime < chunks[j].Mtime // keep this to make tests run

weed/filer/filer_delete_entry.go

@@ -27,7 +27,7 @@ func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isR
 	if entry.IsDirectory() {
 		// delete the folder children, not including the folder itself
 		var dirChunks []*filer_pb.FileChunk
-		dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, entry, isRecursive, ignoreRecursiveError, shouldDeleteChunks && !isCollection, isFromOtherCluster)
+		dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, entry, isRecursive, ignoreRecursiveError, shouldDeleteChunks && !isCollection, isFromOtherCluster, signatures)
 		if err != nil {
 			glog.V(0).Infof("delete directory %s: %v", p, err)
 			return fmt.Errorf("delete directory %s: %v", p, err)
@@ -53,7 +53,7 @@ func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isR
 	return nil
 }
 
-func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry, isRecursive, ignoreRecursiveError, shouldDeleteChunks, isFromOtherCluster bool) (chunks []*filer_pb.FileChunk, err error) {
+func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry, isRecursive, ignoreRecursiveError, shouldDeleteChunks, isFromOtherCluster bool, signatures []int32) (chunks []*filer_pb.FileChunk, err error) {
 
 	lastFileName := ""
 	includeLastFile := false
@@ -73,7 +73,7 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 			lastFileName = sub.Name()
 			var dirChunks []*filer_pb.FileChunk
 			if sub.IsDirectory() {
-				dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, sub, isRecursive, ignoreRecursiveError, shouldDeleteChunks, false)
+				dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, sub, isRecursive, ignoreRecursiveError, shouldDeleteChunks, false, nil)
 				chunks = append(chunks, dirChunks...)
 			} else {
 				f.NotifyUpdateEvent(ctx, sub, nil, shouldDeleteChunks, isFromOtherCluster, nil)
@@ -95,7 +95,7 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 		return nil, fmt.Errorf("filer store delete: %v", storeDeletionErr)
 	}
 
-	f.NotifyUpdateEvent(ctx, entry, nil, shouldDeleteChunks, isFromOtherCluster, nil)
+	f.NotifyUpdateEvent(ctx, entry, nil, shouldDeleteChunks, isFromOtherCluster, signatures)
 
 	return chunks, nil
 }

weed/filer/filer_notify.go

@@ -30,6 +30,15 @@ func (f *Filer) NotifyUpdateEvent(ctx context.Context, oldEntry, newEntry *Entry
 	if strings.HasPrefix(fullpath, SystemLogDir) {
 		return
 	}
+	foundSelf := false
+	for _, sig := range signatures {
+		if sig == f.Signature {
+			foundSelf = true
+		}
+	}
+	if !foundSelf {
+		signatures = append(signatures, f.Signature)
+	}
 
 	newParentPath := ""
 	if newEntry != nil {
@@ -41,7 +50,7 @@ func (f *Filer) NotifyUpdateEvent(ctx context.Context, oldEntry, newEntry *Entry
 		DeleteChunks:       deleteChunks,
 		NewParentPath:      newParentPath,
 		IsFromOtherCluster: isFromOtherCluster,
-		Signatures:         append(signatures, f.Signature),
+		Signatures:         signatures,
 	}
 
 	if notification.Queue != nil {

weed/filesys/dir.go

@@ -328,7 +328,7 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 
 	// first, ensure the filer store can correctly delete
 	glog.V(3).Infof("remove file: %v", req)
-	err = filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, false, false, false, false, dir.wfs.signature)
+	err = filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, false, false, false, false, []int32{dir.wfs.signature})
 	if err != nil {
 		glog.V(3).Infof("not found remove file %s/%s: %v", dir.FullPath(), req.Name, err)
 		return fuse.ENOENT
@@ -348,7 +348,7 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
 
 	glog.V(3).Infof("remove directory entry: %v", req)
-	err := filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, true, false, false, false, dir.wfs.signature)
+	err := filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, true, false, false, false, []int32{dir.wfs.signature})
 	if err != nil {
 		glog.V(0).Infof("remove %s/%s: %v", dir.FullPath(), req.Name, err)
 		if strings.Contains(err.Error(), "non-empty") {

weed/filesys/meta_cache/meta_cache_subscribe.go

@@ -44,7 +44,9 @@ func SubscribeMetaEvents(mc *MetaCache, selfSignature int32, client filer_pb.Fil
 
 	for {
 		err := client.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-			stream, err := client.SubscribeMetadata(context.Background(), &filer_pb.SubscribeMetadataRequest{
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+			stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
 				ClientName: "mount",
 				PathPrefix: dir,
 				SinceNs:    lastTsNs,
@@ -71,7 +73,7 @@ func SubscribeMetaEvents(mc *MetaCache, selfSignature int32, client filer_pb.Fil
 		})
 		if err != nil {
 			glog.Errorf("subscribing filer meta change: %v", err)
-			time.Sleep(time.Second)
 		}
+		time.Sleep(time.Second)
 	}
 }

weed/messaging/broker/broker_grpc_server.go

@@ -19,7 +19,7 @@ func (broker *MessageBroker) DeleteTopic(c context.Context, request *messaging_p
 	if exists, err := filer_pb.Exists(broker, dir, entry, true); err != nil {
 		return nil, err
 	} else if exists {
-		err = filer_pb.Remove(broker, dir, entry, true, true, true, false, 0)
+		err = filer_pb.Remove(broker, dir, entry, true, true, true, false, nil)
 	}
 	return resp, nil
 }

weed/messaging/broker/broker_grpc_server_subscribe.go

@@ -2,6 +2,7 @@ package broker
 
 import (
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/util/log_buffer"
 	"io"
 	"strings"
 	"time"
@@ -113,12 +114,21 @@ func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_Subs
 
 	// fmt.Printf("subscriber %s read %d on disk log %v\n", subscriberId, messageCount, lastReadTime)
 
-	err = lock.logBuffer.LoopProcessLogData(lastReadTime, func() bool {
+	for {
+		lastReadTime, err = lock.logBuffer.LoopProcessLogData(lastReadTime, func() bool {
 			lock.Mutex.Lock()
 			lock.cond.Wait()
 			lock.Mutex.Unlock()
 			return isConnected
 		}, eachLogEntryFn)
+		if err != nil {
+			glog.Errorf("processed to %v: %v", lastReadTime, err)
+			time.Sleep(3127 * time.Millisecond)
+			if err != log_buffer.ResumeError {
+				break
+			}
+		}
+	}
 
 	return err
 

weed/operation/upload_content.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"net/textproto"
 	"path/filepath"
+	"runtime/debug"
 	"strings"
 	"time"
 
@@ -85,7 +86,7 @@ func doUpload(uploadUrl string, filename string, cipher bool, reader io.Reader,
 }
 
 func retriedUploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputCompressed bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
-	for i := 0; i < 3; i++ {
+	for i := 0; i < 1; i++ {
 		uploadResult, err = doUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
 		if err == nil {
 			return
@@ -221,8 +222,9 @@ func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error
 	}
 	resp, post_err := HttpClient.Do(req)
 	if post_err != nil {
-		glog.Errorf("upload to %v: %v", uploadUrl, post_err)
-		return nil, fmt.Errorf("upload to %v: %v", uploadUrl, post_err)
+		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)
 	}
 	defer util.CloseResponse(resp)
 

weed/pb/filer.proto

@@ -58,6 +58,12 @@ service SeaweedFiler {
     rpc LocateBroker (LocateBrokerRequest) returns (LocateBrokerResponse) {
     }
 
+    rpc KvGet (KvGetRequest) returns (KvGetResponse) {
+    }
+
+    rpc KvPut (KvPutRequest) returns (KvPutResponse) {
+    }
+
 }
 
 //////////////////////////////////////////////////
@@ -308,3 +314,19 @@ message LocateBrokerResponse {
     }
     repeated Resource resources = 2;
 }
+
+// Key-Value operations
+message KvGetRequest {
+    bytes key = 1;
+}
+message KvGetResponse {
+    bytes value = 1;
+    string error = 2;
+}
+message KvPutRequest {
+    bytes key = 1;
+    bytes value = 2;
+}
+message KvPutResponse {
+    string error = 1;
+}

weed/pb/filer_pb/filer.pb.go

@@ -2608,6 +2608,211 @@ func (x *LocateBrokerResponse) GetResources() []*LocateBrokerResponse_Resource {
 	return nil
 }
 
+// Key-Value operations
+type KvGetRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key []byte `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+}
+
+func (x *KvGetRequest) Reset() {
+	*x = KvGetRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_filer_proto_msgTypes[40]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KvGetRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KvGetRequest) ProtoMessage() {}
+
+func (x *KvGetRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_filer_proto_msgTypes[40]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KvGetRequest.ProtoReflect.Descriptor instead.
+func (*KvGetRequest) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{40}
+}
+
+func (x *KvGetRequest) GetKey() []byte {
+	if x != nil {
+		return x.Key
+	}
+	return nil
+}
+
+type KvGetResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Value []byte `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
+	Error string `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (x *KvGetResponse) Reset() {
+	*x = KvGetResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_filer_proto_msgTypes[41]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KvGetResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KvGetResponse) ProtoMessage() {}
+
+func (x *KvGetResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_filer_proto_msgTypes[41]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KvGetResponse.ProtoReflect.Descriptor instead.
+func (*KvGetResponse) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{41}
+}
+
+func (x *KvGetResponse) GetValue() []byte {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *KvGetResponse) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
+type KvPutRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Key   []byte `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+	Value []byte `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *KvPutRequest) Reset() {
+	*x = KvPutRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_filer_proto_msgTypes[42]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KvPutRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KvPutRequest) ProtoMessage() {}
+
+func (x *KvPutRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_filer_proto_msgTypes[42]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KvPutRequest.ProtoReflect.Descriptor instead.
+func (*KvPutRequest) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{42}
+}
+
+func (x *KvPutRequest) GetKey() []byte {
+	if x != nil {
+		return x.Key
+	}
+	return nil
+}
+
+func (x *KvPutRequest) GetValue() []byte {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+type KvPutResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Error string `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (x *KvPutResponse) Reset() {
+	*x = KvPutResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_filer_proto_msgTypes[43]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KvPutResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KvPutResponse) ProtoMessage() {}
+
+func (x *KvPutResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_filer_proto_msgTypes[43]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KvPutResponse.ProtoReflect.Descriptor instead.
+func (*KvPutResponse) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{43}
+}
+
+func (x *KvPutResponse) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
 // if found, send the exact address
 // if not found, send the full list of existing brokers
 type LocateBrokerResponse_Resource struct {
@@ -2622,7 +2827,7 @@ type LocateBrokerResponse_Resource struct {
 func (x *LocateBrokerResponse_Resource) Reset() {
 	*x = LocateBrokerResponse_Resource{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[42]
+		mi := &file_filer_proto_msgTypes[46]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2635,7 +2840,7 @@ func (x *LocateBrokerResponse_Resource) String() string {
 func (*LocateBrokerResponse_Resource) ProtoMessage() {}
 
 func (x *LocateBrokerResponse_Resource) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[42]
+	mi := &file_filer_proto_msgTypes[46]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3001,102 +3206,121 @@ var file_filer_proto_rawDesc = []byte{
 	0x20, 0x01, 0x28, 0x09, 0x52, 0x0d, 0x67, 0x72, 0x70, 0x63, 0x41, 0x64, 0x64, 0x72, 0x65, 0x73,
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-	0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x46, 0x69, 0x6c, 0x65, 0x72, 0x12, 0x67, 0x0a, 0x14, 0x4c,
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+	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 (
@@ -3111,7 +3335,7 @@ func file_filer_proto_rawDescGZIP() []byte {
 	return file_filer_proto_rawDescData
 }
 
-var file_filer_proto_msgTypes = make([]protoimpl.MessageInfo, 43)
+var file_filer_proto_msgTypes = make([]protoimpl.MessageInfo, 47)
 var file_filer_proto_goTypes = []interface{}{
 	(*LookupDirectoryEntryRequest)(nil),   // 0: filer_pb.LookupDirectoryEntryRequest
 	(*LookupDirectoryEntryResponse)(nil),  // 1: filer_pb.LookupDirectoryEntryResponse
@@ -3153,16 +3377,20 @@ var file_filer_proto_goTypes = []interface{}{
 	(*KeepConnectedResponse)(nil),         // 37: filer_pb.KeepConnectedResponse
 	(*LocateBrokerRequest)(nil),           // 38: filer_pb.LocateBrokerRequest
 	(*LocateBrokerResponse)(nil),          // 39: filer_pb.LocateBrokerResponse
-	nil,                                   // 40: filer_pb.Entry.ExtendedEntry
-	nil,                                   // 41: filer_pb.LookupVolumeResponse.LocationsMapEntry
-	(*LocateBrokerResponse_Resource)(nil), // 42: filer_pb.LocateBrokerResponse.Resource
+	(*KvGetRequest)(nil),                  // 40: filer_pb.KvGetRequest
+	(*KvGetResponse)(nil),                 // 41: filer_pb.KvGetResponse
+	(*KvPutRequest)(nil),                  // 42: filer_pb.KvPutRequest
+	(*KvPutResponse)(nil),                 // 43: filer_pb.KvPutResponse
+	nil,                                   // 44: filer_pb.Entry.ExtendedEntry
+	nil,                                   // 45: filer_pb.LookupVolumeResponse.LocationsMapEntry
+	(*LocateBrokerResponse_Resource)(nil), // 46: filer_pb.LocateBrokerResponse.Resource
 }
 var file_filer_proto_depIdxs = []int32{
 	4,  // 0: filer_pb.LookupDirectoryEntryResponse.entry:type_name -> filer_pb.Entry
 	4,  // 1: filer_pb.ListEntriesResponse.entry:type_name -> filer_pb.Entry
 	7,  // 2: filer_pb.Entry.chunks:type_name -> filer_pb.FileChunk
 	10, // 3: filer_pb.Entry.attributes:type_name -> filer_pb.FuseAttributes
-	40, // 4: filer_pb.Entry.extended:type_name -> filer_pb.Entry.ExtendedEntry
+	44, // 4: filer_pb.Entry.extended:type_name -> filer_pb.Entry.ExtendedEntry
 	4,  // 5: filer_pb.FullEntry.entry:type_name -> filer_pb.Entry
 	4,  // 6: filer_pb.EventNotification.old_entry:type_name -> filer_pb.Entry
 	4,  // 7: filer_pb.EventNotification.new_entry:type_name -> filer_pb.Entry
@@ -3173,9 +3401,9 @@ var file_filer_proto_depIdxs = []int32{
 	4,  // 12: filer_pb.UpdateEntryRequest.entry:type_name -> filer_pb.Entry
 	7,  // 13: filer_pb.AppendToEntryRequest.chunks:type_name -> filer_pb.FileChunk
 	25, // 14: filer_pb.Locations.locations:type_name -> filer_pb.Location
-	41, // 15: filer_pb.LookupVolumeResponse.locations_map:type_name -> filer_pb.LookupVolumeResponse.LocationsMapEntry
+	45, // 15: filer_pb.LookupVolumeResponse.locations_map:type_name -> filer_pb.LookupVolumeResponse.LocationsMapEntry
 	6,  // 16: filer_pb.SubscribeMetadataResponse.event_notification:type_name -> filer_pb.EventNotification
-	42, // 17: filer_pb.LocateBrokerResponse.resources:type_name -> filer_pb.LocateBrokerResponse.Resource
+	46, // 17: filer_pb.LocateBrokerResponse.resources:type_name -> filer_pb.LocateBrokerResponse.Resource
 	24, // 18: filer_pb.LookupVolumeResponse.LocationsMapEntry.value:type_name -> filer_pb.Locations
 	0,  // 19: filer_pb.SeaweedFiler.LookupDirectoryEntry:input_type -> filer_pb.LookupDirectoryEntryRequest
 	2,  // 20: filer_pb.SeaweedFiler.ListEntries:input_type -> filer_pb.ListEntriesRequest
@@ -3193,24 +3421,28 @@ var file_filer_proto_depIdxs = []int32{
 	33, // 32: filer_pb.SeaweedFiler.SubscribeLocalMetadata:input_type -> filer_pb.SubscribeMetadataRequest
 	36, // 33: filer_pb.SeaweedFiler.KeepConnected:input_type -> filer_pb.KeepConnectedRequest
 	38, // 34: filer_pb.SeaweedFiler.LocateBroker:input_type -> filer_pb.LocateBrokerRequest
-	1,  // 35: filer_pb.SeaweedFiler.LookupDirectoryEntry:output_type -> filer_pb.LookupDirectoryEntryResponse
-	3,  // 36: filer_pb.SeaweedFiler.ListEntries:output_type -> filer_pb.ListEntriesResponse
-	12, // 37: filer_pb.SeaweedFiler.CreateEntry:output_type -> filer_pb.CreateEntryResponse
-	14, // 38: filer_pb.SeaweedFiler.UpdateEntry:output_type -> filer_pb.UpdateEntryResponse
-	16, // 39: filer_pb.SeaweedFiler.AppendToEntry:output_type -> filer_pb.AppendToEntryResponse
-	18, // 40: filer_pb.SeaweedFiler.DeleteEntry:output_type -> filer_pb.DeleteEntryResponse
-	20, // 41: filer_pb.SeaweedFiler.AtomicRenameEntry:output_type -> filer_pb.AtomicRenameEntryResponse
-	22, // 42: filer_pb.SeaweedFiler.AssignVolume:output_type -> filer_pb.AssignVolumeResponse
-	26, // 43: filer_pb.SeaweedFiler.LookupVolume:output_type -> filer_pb.LookupVolumeResponse
-	28, // 44: filer_pb.SeaweedFiler.DeleteCollection:output_type -> filer_pb.DeleteCollectionResponse
-	30, // 45: filer_pb.SeaweedFiler.Statistics:output_type -> filer_pb.StatisticsResponse
-	32, // 46: filer_pb.SeaweedFiler.GetFilerConfiguration:output_type -> filer_pb.GetFilerConfigurationResponse
-	34, // 47: filer_pb.SeaweedFiler.SubscribeMetadata:output_type -> filer_pb.SubscribeMetadataResponse
-	34, // 48: filer_pb.SeaweedFiler.SubscribeLocalMetadata:output_type -> filer_pb.SubscribeMetadataResponse
-	37, // 49: filer_pb.SeaweedFiler.KeepConnected:output_type -> filer_pb.KeepConnectedResponse
-	39, // 50: filer_pb.SeaweedFiler.LocateBroker:output_type -> filer_pb.LocateBrokerResponse
-	35, // [35:51] is the sub-list for method output_type
-	19, // [19:35] is the sub-list for method input_type
+	40, // 35: filer_pb.SeaweedFiler.KvGet:input_type -> filer_pb.KvGetRequest
+	42, // 36: filer_pb.SeaweedFiler.KvPut:input_type -> filer_pb.KvPutRequest
+	1,  // 37: filer_pb.SeaweedFiler.LookupDirectoryEntry:output_type -> filer_pb.LookupDirectoryEntryResponse
+	3,  // 38: filer_pb.SeaweedFiler.ListEntries:output_type -> filer_pb.ListEntriesResponse
+	12, // 39: filer_pb.SeaweedFiler.CreateEntry:output_type -> filer_pb.CreateEntryResponse
+	14, // 40: filer_pb.SeaweedFiler.UpdateEntry:output_type -> filer_pb.UpdateEntryResponse
+	16, // 41: filer_pb.SeaweedFiler.AppendToEntry:output_type -> filer_pb.AppendToEntryResponse
+	18, // 42: filer_pb.SeaweedFiler.DeleteEntry:output_type -> filer_pb.DeleteEntryResponse
+	20, // 43: filer_pb.SeaweedFiler.AtomicRenameEntry:output_type -> filer_pb.AtomicRenameEntryResponse
+	22, // 44: filer_pb.SeaweedFiler.AssignVolume:output_type -> filer_pb.AssignVolumeResponse
+	26, // 45: filer_pb.SeaweedFiler.LookupVolume:output_type -> filer_pb.LookupVolumeResponse
+	28, // 46: filer_pb.SeaweedFiler.DeleteCollection:output_type -> filer_pb.DeleteCollectionResponse
+	30, // 47: filer_pb.SeaweedFiler.Statistics:output_type -> filer_pb.StatisticsResponse
+	32, // 48: filer_pb.SeaweedFiler.GetFilerConfiguration:output_type -> filer_pb.GetFilerConfigurationResponse
+	34, // 49: filer_pb.SeaweedFiler.SubscribeMetadata:output_type -> filer_pb.SubscribeMetadataResponse
+	34, // 50: filer_pb.SeaweedFiler.SubscribeLocalMetadata:output_type -> filer_pb.SubscribeMetadataResponse
+	37, // 51: filer_pb.SeaweedFiler.KeepConnected:output_type -> filer_pb.KeepConnectedResponse
+	39, // 52: filer_pb.SeaweedFiler.LocateBroker:output_type -> filer_pb.LocateBrokerResponse
+	41, // 53: filer_pb.SeaweedFiler.KvGet:output_type -> filer_pb.KvGetResponse
+	43, // 54: filer_pb.SeaweedFiler.KvPut:output_type -> filer_pb.KvPutResponse
+	37, // [37:55] is the sub-list for method output_type
+	19, // [19:37] is the sub-list for method input_type
 	19, // [19:19] is the sub-list for extension type_name
 	19, // [19:19] is the sub-list for extension extendee
 	0,  // [0:19] is the sub-list for field type_name
@@ -3702,7 +3934,55 @@ func file_filer_proto_init() {
 				return nil
 			}
 		}
+		file_filer_proto_msgTypes[40].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KvGetRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_filer_proto_msgTypes[41].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KvGetResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 		file_filer_proto_msgTypes[42].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KvPutRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_filer_proto_msgTypes[43].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KvPutResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_filer_proto_msgTypes[46].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*LocateBrokerResponse_Resource); i {
 			case 0:
 				return &v.state
@@ -3721,7 +4001,7 @@ func file_filer_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_filer_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   43,
+			NumMessages:   47,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
@@ -3763,6 +4043,8 @@ type SeaweedFilerClient interface {
 	SubscribeLocalMetadata(ctx context.Context, in *SubscribeMetadataRequest, opts ...grpc.CallOption) (SeaweedFiler_SubscribeLocalMetadataClient, error)
 	KeepConnected(ctx context.Context, opts ...grpc.CallOption) (SeaweedFiler_KeepConnectedClient, error)
 	LocateBroker(ctx context.Context, in *LocateBrokerRequest, opts ...grpc.CallOption) (*LocateBrokerResponse, error)
+	KvGet(ctx context.Context, in *KvGetRequest, opts ...grpc.CallOption) (*KvGetResponse, error)
+	KvPut(ctx context.Context, in *KvPutRequest, opts ...grpc.CallOption) (*KvPutResponse, error)
 }
 
 type seaweedFilerClient struct {
@@ -4008,6 +4290,24 @@ func (c *seaweedFilerClient) LocateBroker(ctx context.Context, in *LocateBrokerR
 	return out, nil
 }
 
+func (c *seaweedFilerClient) KvGet(ctx context.Context, in *KvGetRequest, opts ...grpc.CallOption) (*KvGetResponse, error) {
+	out := new(KvGetResponse)
+	err := c.cc.Invoke(ctx, "/filer_pb.SeaweedFiler/KvGet", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *seaweedFilerClient) KvPut(ctx context.Context, in *KvPutRequest, opts ...grpc.CallOption) (*KvPutResponse, error) {
+	out := new(KvPutResponse)
+	err := c.cc.Invoke(ctx, "/filer_pb.SeaweedFiler/KvPut", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // SeaweedFilerServer is the server API for SeaweedFiler service.
 type SeaweedFilerServer interface {
 	LookupDirectoryEntry(context.Context, *LookupDirectoryEntryRequest) (*LookupDirectoryEntryResponse, error)
@@ -4026,6 +4326,8 @@ type SeaweedFilerServer interface {
 	SubscribeLocalMetadata(*SubscribeMetadataRequest, SeaweedFiler_SubscribeLocalMetadataServer) error
 	KeepConnected(SeaweedFiler_KeepConnectedServer) error
 	LocateBroker(context.Context, *LocateBrokerRequest) (*LocateBrokerResponse, error)
+	KvGet(context.Context, *KvGetRequest) (*KvGetResponse, error)
+	KvPut(context.Context, *KvPutRequest) (*KvPutResponse, error)
 }
 
 // UnimplementedSeaweedFilerServer can be embedded to have forward compatible implementations.
@@ -4080,6 +4382,12 @@ func (*UnimplementedSeaweedFilerServer) KeepConnected(SeaweedFiler_KeepConnected
 func (*UnimplementedSeaweedFilerServer) LocateBroker(context.Context, *LocateBrokerRequest) (*LocateBrokerResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method LocateBroker not implemented")
 }
+func (*UnimplementedSeaweedFilerServer) KvGet(context.Context, *KvGetRequest) (*KvGetResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method KvGet not implemented")
+}
+func (*UnimplementedSeaweedFilerServer) KvPut(context.Context, *KvPutRequest) (*KvPutResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method KvPut not implemented")
+}
 
 func RegisterSeaweedFilerServer(s *grpc.Server, srv SeaweedFilerServer) {
 	s.RegisterService(&_SeaweedFiler_serviceDesc, srv)
@@ -4390,6 +4698,42 @@ func _SeaweedFiler_LocateBroker_Handler(srv interface{}, ctx context.Context, de
 	return interceptor(ctx, in, info, handler)
 }
 
+func _SeaweedFiler_KvGet_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(KvGetRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedFilerServer).KvGet(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/filer_pb.SeaweedFiler/KvGet",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedFilerServer).KvGet(ctx, req.(*KvGetRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _SeaweedFiler_KvPut_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(KvPutRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SeaweedFilerServer).KvPut(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/filer_pb.SeaweedFiler/KvPut",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SeaweedFilerServer).KvPut(ctx, req.(*KvPutRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _SeaweedFiler_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "filer_pb.SeaweedFiler",
 	HandlerType: (*SeaweedFilerServer)(nil),
@@ -4442,6 +4786,14 @@ var _SeaweedFiler_serviceDesc = grpc.ServiceDesc{
 			MethodName: "LocateBroker",
 			Handler:    _SeaweedFiler_LocateBroker_Handler,
 		},
+		{
+			MethodName: "KvGet",
+			Handler:    _SeaweedFiler_KvGet_Handler,
+		},
+		{
+			MethodName: "KvPut",
+			Handler:    _SeaweedFiler_KvPut_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{

weed/pb/filer_pb/filer_client.go

@@ -214,7 +214,7 @@ func MkFile(filerClient FilerClient, parentDirectoryPath string, fileName string
 	})
 }
 
-func Remove(filerClient FilerClient, parentDirectoryPath, name string, isDeleteData, isRecursive, ignoreRecursiveErr, isFromOtherCluster bool, signature int32) error {
+func Remove(filerClient FilerClient, parentDirectoryPath, name string, isDeleteData, isRecursive, ignoreRecursiveErr, isFromOtherCluster bool, signatures []int32) error {
 	return filerClient.WithFilerClient(func(client SeaweedFilerClient) error {
 
 		deleteEntryRequest := &DeleteEntryRequest{
@@ -224,9 +224,7 @@ func Remove(filerClient FilerClient, parentDirectoryPath, name string, isDeleteD
 			IsRecursive:          isRecursive,
 			IgnoreRecursiveError: ignoreRecursiveErr,
 			IsFromOtherCluster:   isFromOtherCluster,
-		}
-		if signature != 0 {
-			deleteEntryRequest.Signatures = []int32{signature}
+			Signatures:           signatures,
 		}
 		if resp, err := client.DeleteEntry(context.Background(), deleteEntryRequest); err != nil {
 			if strings.Contains(err.Error(), ErrNotFound.Error()) {

weed/pb/filer_pb/filer_pb_helper.go

@@ -59,6 +59,15 @@ func BeforeEntrySerialization(chunks []*FileChunk) {
 	}
 }
 
+func EnsureFid(chunk *FileChunk) {
+	if chunk.Fid != nil {
+		return
+	}
+	if fid, err := ToFileIdObject(chunk.FileId); err == nil {
+		chunk.Fid = fid
+	}
+}
+
 func AfterEntryDeserialization(chunks []*FileChunk) {
 
 	for _, chunk := range chunks {

weed/replication/replicator.go

@@ -3,6 +3,8 @@ package replication
 import (
 	"context"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"google.golang.org/grpc"
 	"strings"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
@@ -43,28 +45,43 @@ func (r *Replicator) Replicate(ctx context.Context, key string, message *filer_p
 	key = newKey
 	if message.OldEntry != nil && message.NewEntry == nil {
 		glog.V(4).Infof("deleting %v", key)
-		return r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks)
+		return r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
 	}
 	if message.OldEntry == nil && message.NewEntry != nil {
 		glog.V(4).Infof("creating %v", key)
-		return r.sink.CreateEntry(key, message.NewEntry)
+		return r.sink.CreateEntry(key, message.NewEntry, message.Signatures)
 	}
 	if message.OldEntry == nil && message.NewEntry == nil {
 		glog.V(0).Infof("weird message %+v", message)
 		return nil
 	}
 
-	foundExisting, err := r.sink.UpdateEntry(key, message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks)
+	foundExisting, err := r.sink.UpdateEntry(key, message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks, message.Signatures)
 	if foundExisting {
 		glog.V(4).Infof("updated %v", key)
 		return err
 	}
 
-	err = r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, false)
+	err = r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, false, message.Signatures)
 	if err != nil {
 		return fmt.Errorf("delete old entry %v: %v", key, err)
 	}
 
 	glog.V(4).Infof("creating missing %v", key)
-	return r.sink.CreateEntry(key, message.NewEntry)
+	return r.sink.CreateEntry(key, message.NewEntry, message.Signatures)
 }
+
+func ReadFilerSignature(grpcDialOption grpc.DialOption, filer string) (filerSignature int32, readErr error) {
+	if readErr = pb.WithFilerClient(filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		if resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{}); err != nil {
+			return fmt.Errorf("GetFilerConfiguration %s: %v", filer, err)
+		} else {
+			filerSignature = resp.Signature
+		}
+		return nil
+	}); readErr != nil {
+		return 0, readErr
+	}
+	return filerSignature, nil
+}
+

weed/replication/sink/azuresink/azure_sink.go

@@ -70,7 +70,7 @@ func (g *AzureSink) initialize(accountName, accountKey, container, dir string) e
 	return nil
 }
 
-func (g *AzureSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
+func (g *AzureSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
 
 	key = cleanKey(key)
 
@@ -87,7 +87,7 @@ func (g *AzureSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks boo
 
 }
 
-func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
+func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
 
 	key = cleanKey(key)
 
@@ -132,7 +132,7 @@ func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
 }
 
-func (g *AzureSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+func (g *AzureSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
 	key = cleanKey(key)
 	// TODO improve efficiency
 	return false, nil

weed/replication/sink/b2sink/b2_sink.go

@@ -57,7 +57,7 @@ func (g *B2Sink) initialize(accountId, accountKey, bucket, dir string) error {
 	return nil
 }
 
-func (g *B2Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
+func (g *B2Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
 
 	key = cleanKey(key)
 
@@ -76,7 +76,7 @@ func (g *B2Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool)
 
 }
 
-func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
+func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
 
 	key = cleanKey(key)
 
@@ -123,7 +123,7 @@ func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
 }
 
-func (g *B2Sink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+func (g *B2Sink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
 
 	key = cleanKey(key)
 

weed/replication/sink/filersink/filer_sink.go

@@ -25,7 +25,6 @@ type FilerSink struct {
 	ttlSec         int32
 	dataCenter     string
 	grpcDialOption grpc.DialOption
-	signature      int32
 }
 
 func init() {
@@ -41,37 +40,36 @@ func (fs *FilerSink) GetSinkToDirectory() string {
 }
 
 func (fs *FilerSink) Initialize(configuration util.Configuration, prefix string) error {
-	return fs.initialize(
+	return fs.DoInitialize(
 		configuration.GetString(prefix+"grpcAddress"),
 		configuration.GetString(prefix+"directory"),
 		configuration.GetString(prefix+"replication"),
 		configuration.GetString(prefix+"collection"),
 		configuration.GetInt(prefix+"ttlSec"),
-	)
+		security.LoadClientTLS(util.GetViper(), "grpc.client"))
 }
 
 func (fs *FilerSink) SetSourceFiler(s *source.FilerSource) {
 	fs.filerSource = s
 }
 
-func (fs *FilerSink) initialize(grpcAddress string, dir string,
-	replication string, collection string, ttlSec int) (err error) {
+func (fs *FilerSink) DoInitialize(grpcAddress string, dir string,
+	replication string, collection string, ttlSec int, grpcDialOption grpc.DialOption) (err error) {
 	fs.grpcAddress = grpcAddress
 	fs.dir = dir
 	fs.replication = replication
 	fs.collection = collection
 	fs.ttlSec = int32(ttlSec)
-	fs.grpcDialOption = security.LoadClientTLS(util.GetViper(), "grpc.client")
-	fs.signature = util.RandomInt32()
+	fs.grpcDialOption = grpcDialOption
 	return nil
 }
 
-func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
+func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
 
 	dir, name := util.FullPath(key).DirAndName()
 
-	glog.V(1).Infof("delete entry: %v", key)
-	err := filer_pb.Remove(fs, dir, name, deleteIncludeChunks, false, false, true, fs.signature)
+	glog.V(4).Infof("delete entry: %v", key)
+	err := filer_pb.Remove(fs, dir, name, deleteIncludeChunks, true, true, true, signatures)
 	if err != nil {
 		glog.V(0).Infof("delete entry %s: %v", key, err)
 		return fmt.Errorf("delete entry %s: %v", key, err)
@@ -79,7 +77,7 @@ func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bo
 	return nil
 }
 
-func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry) error {
+func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
 
 	return fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
@@ -93,7 +91,7 @@ func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		glog.V(1).Infof("lookup: %v", lookupRequest)
 		if resp, err := filer_pb.LookupEntry(client, lookupRequest); err == nil {
 			if filer.ETag(resp.Entry) == filer.ETag(entry) {
-				glog.V(0).Infof("already replicated %s", key)
+				glog.V(3).Infof("already replicated %s", key)
 				return nil
 			}
 		}
@@ -101,11 +99,11 @@ func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		replicatedChunks, err := fs.replicateChunks(entry.Chunks, dir)
 
 		if err != nil {
-			glog.V(0).Infof("replicate entry chunks %s: %v", key, err)
-			return fmt.Errorf("replicate entry chunks %s: %v", key, err)
+			// only warning here since the source chunk may have been deleted already
+			glog.Warningf("replicate entry chunks %s: %v", key, err)
 		}
 
-		glog.V(0).Infof("replicated %s %+v ===> %+v", key, entry.Chunks, replicatedChunks)
+		glog.V(4).Infof("replicated %s %+v ===> %+v", key, entry.Chunks, replicatedChunks)
 
 		request := &filer_pb.CreateEntryRequest{
 			Directory: dir,
@@ -116,10 +114,10 @@ func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 				Chunks:      replicatedChunks,
 			},
 			IsFromOtherCluster: true,
-			Signatures:         []int32{fs.signature},
+			Signatures:         signatures,
 		}
 
-		glog.V(1).Infof("create: %v", request)
+		glog.V(3).Infof("create: %v", request)
 		if err := filer_pb.CreateEntry(client, request); err != nil {
 			glog.V(0).Infof("create entry %s: %v", key, err)
 			return fmt.Errorf("create entry %s: %v", key, err)
@@ -129,7 +127,7 @@ func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 	})
 }
 
-func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
 
 	dir, name := util.FullPath(key).DirAndName()
 
@@ -158,16 +156,16 @@ func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParent
 		return false, fmt.Errorf("lookup %s: %v", key, err)
 	}
 
-	glog.V(0).Infof("oldEntry %+v, newEntry %+v, existingEntry: %+v", oldEntry, newEntry, existingEntry)
+	glog.V(4).Infof("oldEntry %+v, newEntry %+v, existingEntry: %+v", oldEntry, newEntry, existingEntry)
 
 	if existingEntry.Attributes.Mtime > newEntry.Attributes.Mtime {
 		// skip if already changed
 		// this usually happens when the messages are not ordered
-		glog.V(0).Infof("late updates %s", key)
+		glog.V(2).Infof("late updates %s", key)
 	} else if filer.ETag(newEntry) == filer.ETag(existingEntry) {
 		// skip if no change
 		// this usually happens when retrying the replication
-		glog.V(0).Infof("already replicated %s", key)
+		glog.V(3).Infof("already replicated %s", key)
 	} else {
 		// find out what changed
 		deletedChunks, newChunks, err := compareChunks(filer.LookupFn(fs), oldEntry, newEntry)
@@ -196,7 +194,7 @@ func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParent
 			Directory:          newParentPath,
 			Entry:              existingEntry,
 			IsFromOtherCluster: true,
-			Signatures:         []int32{fs.signature},
+			Signatures:         signatures,
 		}
 
 		if _, err := client.UpdateEntry(context.Background(), request); err != nil {

weed/replication/sink/gcssink/gcs_sink.go

@@ -69,7 +69,7 @@ func (g *GcsSink) initialize(google_application_credentials, bucketName, dir str
 	return nil
 }
 
-func (g *GcsSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
+func (g *GcsSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
 
 	if isDirectory {
 		key = key + "/"
@@ -83,7 +83,7 @@ func (g *GcsSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool)
 
 }
 
-func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry) error {
+func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
 
 	if entry.IsDirectory {
 		return nil
@@ -119,7 +119,7 @@ func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
 }
 
-func (g *GcsSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+func (g *GcsSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
 	// TODO improve efficiency
 	return false, nil
 }

weed/replication/sink/replication_sink.go

@@ -9,9 +9,9 @@ import (
 type ReplicationSink interface {
 	GetName() string
 	Initialize(configuration util.Configuration, prefix string) error
-	DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error
-	CreateEntry(key string, entry *filer_pb.Entry) error
-	UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error)
+	DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error
+	CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error
+	UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error)
 	GetSinkToDirectory() string
 	SetSourceFiler(s *source.FilerSource)
 }

weed/replication/sink/s3sink/s3_sink.go

@@ -83,7 +83,7 @@ func (s3sink *S3Sink) initialize(awsAccessKeyId, awsSecretAccessKey, region, buc
 	return nil
 }
 
-func (s3sink *S3Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
+func (s3sink *S3Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
 
 	key = cleanKey(key)
 
@@ -95,7 +95,7 @@ func (s3sink *S3Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks b
 
 }
 
-func (s3sink *S3Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
+func (s3sink *S3Sink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
 	key = cleanKey(key)
 
 	if entry.IsDirectory {
@@ -136,7 +136,7 @@ func (s3sink *S3Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
 }
 
-func (s3sink *S3Sink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+func (s3sink *S3Sink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
 	key = cleanKey(key)
 	// TODO improve efficiency
 	return false, nil

weed/replication/source/filer_source.go

@@ -28,13 +28,13 @@ type FilerSource struct {
 }
 
 func (fs *FilerSource) Initialize(configuration util.Configuration, prefix string) error {
-	return fs.initialize(
+	return fs.DoInitialize(
 		configuration.GetString(prefix+"grpcAddress"),
 		configuration.GetString(prefix+"directory"),
 	)
 }
 
-func (fs *FilerSource) initialize(grpcAddress string, dir string) (err error) {
+func (fs *FilerSource) DoInitialize(grpcAddress string, dir string) (err error) {
 	fs.grpcAddress = grpcAddress
 	fs.Dir = dir
 	fs.grpcDialOption = security.LoadClientTLS(util.GetViper(), "grpc.client")

weed/server/filer_grpc_server.go

@@ -314,7 +314,7 @@ func (fs *FilerServer) DeleteEntry(ctx context.Context, req *filer_pb.DeleteEntr
 
 	glog.V(4).Infof("DeleteEntry %v", req)
 
-	err = fs.filer.DeleteEntryMetaAndData(ctx, util.JoinPath(req.Directory, req.Name), req.IsRecursive, req.IgnoreRecursiveError, req.IsDeleteData, req.IsFromOtherCluster, nil)
+	err = fs.filer.DeleteEntryMetaAndData(ctx, util.JoinPath(req.Directory, req.Name), req.IsRecursive, req.IgnoreRecursiveError, req.IsDeleteData, req.IsFromOtherCluster, req.Signatures)
 	resp = &filer_pb.DeleteEntryResponse{}
 	if err != nil {
 		resp.Error = err.Error()

weed/server/filer_grpc_server_kv.go

@@ -0,0 +1,42 @@
+package weed_server
+
+import (
+	"context"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+)
+
+func (fs *FilerServer) KvGet(ctx context.Context, req *filer_pb.KvGetRequest) (*filer_pb.KvGetResponse, error) {
+
+	value, err := fs.filer.Store.KvGet(ctx, req.Key)
+	if err == filer.ErrKvNotFound {
+		return &filer_pb.KvGetResponse{}, nil
+	}
+
+	if err != nil {
+		return &filer_pb.KvGetResponse{Error: err.Error()}, nil
+	}
+
+	return &filer_pb.KvGetResponse{
+		Value: value,
+	}, nil
+
+}
+
+// KvPut sets the key~value. if empty value, delete the kv entry
+func (fs *FilerServer) KvPut(ctx context.Context, req *filer_pb.KvPutRequest) (*filer_pb.KvPutResponse, error) {
+
+	if len(req.Value) == 0 {
+		if err := fs.filer.Store.KvDelete(ctx, req.Key); err != nil {
+			return &filer_pb.KvPutResponse{Error: err.Error()}, nil
+		}
+	}
+
+	err := fs.filer.Store.KvPut(ctx, req.Key, req.Value)
+	if err != nil {
+		return &filer_pb.KvPutResponse{Error: err.Error()}, nil
+	}
+
+	return &filer_pb.KvPutResponse{}, nil
+
+}

weed/server/filer_grpc_server_sub_meta.go

@@ -2,6 +2,7 @@ package weed_server
 
 import (
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/util/log_buffer"
 	"strings"
 	"time"
 
@@ -24,7 +25,7 @@ func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest,
 	lastReadTime := time.Unix(0, req.SinceNs)
 	glog.V(0).Infof(" %v starts to subscribe %s from %+v", clientName, req.PathPrefix, lastReadTime)
 
-	eachEventNotificationFn := eachEventNotificationFn(req, stream, clientName, req.Signature)
+	eachEventNotificationFn := fs.eachEventNotificationFn(req, stream, clientName, req.Signature)
 
 	eachLogEntryFn := eachLogEntryFn(eachEventNotificationFn)
 
@@ -37,12 +38,21 @@ func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest,
 		lastReadTime = time.Unix(0, processedTsNs)
 	}
 
-	err = fs.filer.MetaAggregator.MetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
+	for {
+		lastReadTime, err = fs.filer.MetaAggregator.MetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
 			fs.filer.MetaAggregator.ListenersLock.Lock()
 			fs.filer.MetaAggregator.ListenersCond.Wait()
 			fs.filer.MetaAggregator.ListenersLock.Unlock()
 			return true
 		}, eachLogEntryFn)
+		if err != nil {
+			glog.Errorf("processed to %v: %v", lastReadTime, err)
+			time.Sleep(3127 * time.Millisecond)
+			if err != log_buffer.ResumeError {
+				break
+			}
+		}
+	}
 
 	return err
 
@@ -59,7 +69,7 @@ func (fs *FilerServer) SubscribeLocalMetadata(req *filer_pb.SubscribeMetadataReq
 	lastReadTime := time.Unix(0, req.SinceNs)
 	glog.V(0).Infof(" %v local subscribe %s from %+v", clientName, req.PathPrefix, lastReadTime)
 
-	eachEventNotificationFn := eachEventNotificationFn(req, stream, clientName, req.Signature)
+	eachEventNotificationFn := fs.eachEventNotificationFn(req, stream, clientName, req.Signature)
 
 	eachLogEntryFn := eachLogEntryFn(eachEventNotificationFn)
 
@@ -75,12 +85,21 @@ func (fs *FilerServer) SubscribeLocalMetadata(req *filer_pb.SubscribeMetadataReq
 	glog.V(0).Infof("after local log reads, %v local subscribe %s from %+v", clientName, req.PathPrefix, lastReadTime)
 
 	// println("reading from in memory logs ...")
-	err = fs.filer.LocalMetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
+	for {
+		lastReadTime, err = fs.filer.LocalMetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
 			fs.listenersLock.Lock()
 			fs.listenersCond.Wait()
 			fs.listenersLock.Unlock()
 			return true
 		}, eachLogEntryFn)
+		if err != nil {
+			glog.Errorf("processed to %v: %v", lastReadTime, err)
+			time.Sleep(3127 * time.Millisecond)
+			if err != log_buffer.ResumeError {
+				break
+			}
+		}
+	}
 
 	return err
 
@@ -102,13 +121,20 @@ func eachLogEntryFn(eachEventNotificationFn func(dirPath string, eventNotificati
 	}
 }
 
-func eachEventNotificationFn(req *filer_pb.SubscribeMetadataRequest, stream filer_pb.SeaweedFiler_SubscribeMetadataServer, clientName string, clientSignature int32) func(dirPath string, eventNotification *filer_pb.EventNotification, tsNs int64) error {
+func (fs *FilerServer) eachEventNotificationFn(req *filer_pb.SubscribeMetadataRequest, stream filer_pb.SeaweedFiler_SubscribeMetadataServer, clientName string, clientSignature int32) func(dirPath string, eventNotification *filer_pb.EventNotification, tsNs int64) error {
 	return func(dirPath string, eventNotification *filer_pb.EventNotification, tsNs int64) error {
 
+		foundSelf := false
 		for _, sig := range eventNotification.Signatures {
 			if sig == clientSignature && clientSignature != 0 {
 				return nil
 			}
+			if sig == fs.filer.Signature {
+				foundSelf = true
+			}
+		}
+		if !foundSelf {
+			eventNotification.Signatures = append(eventNotification.Signatures, fs.filer.Signature)
 		}
 
 		// get complete path to the file or directory

weed/server/webdav_server.go

@@ -259,7 +259,7 @@ func (fs *WebDavFileSystem) removeAll(ctx context.Context, fullFilePath string)
 
 	dir, name := util.FullPath(fullFilePath).DirAndName()
 
-	return filer_pb.Remove(fs, dir, name, true, false, false, false, fs.signature)
+	return filer_pb.Remove(fs, dir, name, true, false, false, false, []int32{fs.signature})
 
 }
 

weed/shell/command_bucket_delete.go

@@ -49,6 +49,6 @@ func (c *commandBucketDelete) Do(args []string, commandEnv *CommandEnv, writer i
 		return fmt.Errorf("read buckets: %v", err)
 	}
 
-	return filer_pb.Remove(commandEnv, filerBucketsPath, *bucketName, false, true, true, false, 0)
+	return filer_pb.Remove(commandEnv, filerBucketsPath, *bucketName, false, true, true, false, nil)
 
 }

weed/shell/command_volume_fix_replication.go

@@ -79,6 +79,10 @@ func (c *commandVolumeFixReplication) Do(args []string, commandEnv *CommandEnv,
 		allLocations = append(allLocations, loc)
 	})
 
+	if len(allLocations) == 0 {
+		return fmt.Errorf("no data nodes at all")
+	}
+
 	// find all under replicated volumes
 	var underReplicatedVolumeIds, overReplicatedVolumeIds []uint32
 	for vid, replicas := range volumeReplicas {
@@ -100,10 +104,6 @@ func (c *commandVolumeFixReplication) Do(args []string, commandEnv *CommandEnv,
 		return nil
 	}
 
-	if len(allLocations) == 0 {
-		return fmt.Errorf("no data nodes at all")
-	}
-
 	// find the most under populated data nodes
 	keepDataNodesSorted(allLocations)
 

weed/util/log_buffer/log_read.go

@@ -2,6 +2,7 @@ package log_buffer
 
 import (
 	"bytes"
+	"fmt"
 	"time"
 
 	"github.com/golang/protobuf/proto"
@@ -11,13 +12,17 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
+var (
+	ResumeError = fmt.Errorf("resume")
+)
+
 func (logBuffer *LogBuffer) LoopProcessLogData(
 	startTreadTime time.Time,
 	waitForDataFn func() bool,
-	eachLogDataFn func(logEntry *filer_pb.LogEntry) error) (err error) {
+	eachLogDataFn func(logEntry *filer_pb.LogEntry) error) (lastReadTime time.Time, err error) {
 	// loop through all messages
 	var bytesBuf *bytes.Buffer
-	lastReadTime := startTreadTime
+	lastReadTime = startTreadTime
 	defer func() {
 		if bytesBuf != nil {
 			logBuffer.ReleaseMemory(bytesBuf)
@@ -48,10 +53,13 @@ func (logBuffer *LogBuffer) LoopProcessLogData(
 		for pos := 0; pos+4 < len(buf); {
 
 			size := util.BytesToUint32(buf[pos : pos+4])
+			if pos+4+int(size) > len(buf) {
+				err = ResumeError
+				glog.Errorf("LoopProcessLogData: read buffer %v read %d [%d,%d) from [0,%d)", lastReadTime, batchSize, pos, pos+int(size)+4, len(buf))
+				return
+			}
 			entryData := buf[pos+4 : pos+4+int(size)]
 
-			// fmt.Printf("read buffer read %d [%d,%d) from [0,%d)\n", batchSize, pos, pos+int(size)+4, len(buf))
-
 			logEntry := &filer_pb.LogEntry{}
 			if err = proto.Unmarshal(entryData, logEntry); err != nil {
 				glog.Errorf("unexpected unmarshal messaging_pb.Message: %v", err)