diff --git a/weed/filer/filer_notify_read.go b/weed/filer/filer_notify_read.go
index 115a925e9..ac2c763e6 100644
--- a/weed/filer/filer_notify_read.go
+++ b/weed/filer/filer_notify_read.go
@@ -4,15 +4,16 @@ import (
 	"container/heap"
 	"context"
 	"fmt"
-	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
-	"github.com/seaweedfs/seaweedfs/weed/util/log_buffer"
-	"github.com/seaweedfs/seaweedfs/weed/wdclient"
-	"google.golang.org/protobuf/proto"
 	"io"
 	"math"
 	"strings"
 	"time"
 
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util/log_buffer"
+	"github.com/seaweedfs/seaweedfs/weed/wdclient"
+	"google.golang.org/protobuf/proto"
+
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )
@@ -39,6 +40,19 @@ func (f *Filer) collectPersistedLogBuffer(startPosition log_buffer.MessagePositi
 
 }
 
+func (f *Filer) HasPersistedLogFiles(startPosition log_buffer.MessagePosition) (bool, error) {
+	startDate := fmt.Sprintf("%04d-%02d-%02d", startPosition.Year(), startPosition.Month(), startPosition.Day())
+	dayEntries, _, listDayErr := f.ListDirectoryEntries(context.Background(), SystemLogDir, startDate, true, 1, "", "", "")
+
+	if listDayErr != nil {
+		return false, fmt.Errorf("fail to list log by day: %v", listDayErr)
+	}
+	if len(dayEntries) == 0 {
+		return false, nil
+	}
+	return true, nil
+}
+
 // ----------
 type LogEntryItem struct {
 	Entry *filer_pb.LogEntry
@@ -103,7 +117,7 @@ func (o *OrderedLogVisitor) GetNext() (logEntry *filer_pb.LogEntry, err error) {
 	if nextErr != nil {
 		if nextErr == io.EOF {
 			// do nothing since the filer has no more log entries
-		}else {
+		} else {
 			return nil, fmt.Errorf("failed to get next log entry: %v", nextErr)
 		}
 	} else {
@@ -230,7 +244,7 @@ func (c *LogFileEntryCollector) collectMore(v *OrderedLogVisitor) (err error) {
 		if nextErr != nil {
 			if nextErr == io.EOF {
 				// do nothing since the filer has no more log entries
-			}else {
+			} else {
 				return fmt.Errorf("failed to get next log entry for %v: %v", entryName, err)
 			}
 		} else {
diff --git a/weed/server/filer_grpc_server_sub_meta.go b/weed/server/filer_grpc_server_sub_meta.go
index 436d6746a..f4c6bfe9d 100644
--- a/weed/server/filer_grpc_server_sub_meta.go
+++ b/weed/server/filer_grpc_server_sub_meta.go
@@ -2,11 +2,12 @@ package weed_server
 
 import (
 	"fmt"
-	"github.com/seaweedfs/seaweedfs/weed/stats"
 	"strings"
 	"sync/atomic"
 	"time"
 
+	"github.com/seaweedfs/seaweedfs/weed/stats"
+
 	"google.golang.org/protobuf/proto"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
@@ -62,8 +63,19 @@ func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest,
 			return nil
 		}
 
+		glog.V(4).Infof("processed to %v: %v", clientName, processedTsNs)
 		if processedTsNs != 0 {
 			lastReadTime = log_buffer.NewMessagePosition(processedTsNs, -2)
+		} else {
+			nextDayTs := util.GetNextDayTsNano(lastReadTime.UnixNano())
+			position := log_buffer.NewMessagePosition(nextDayTs, -2)
+			found, err := fs.filer.HasPersistedLogFiles(position)
+			if err != nil {
+				return fmt.Errorf("checking persisted log files: %v", err)
+			}
+			if found {
+				lastReadTime = position
+			}
 		}
 
 		glog.V(4).Infof("read in memory %v aggregated subscribe %s from %+v", clientName, req.PathPrefix, lastReadTime)
@@ -72,10 +84,7 @@ func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest,
 			fs.filer.MetaAggregator.ListenersLock.Lock()
 			fs.filer.MetaAggregator.ListenersCond.Wait()
 			fs.filer.MetaAggregator.ListenersLock.Unlock()
-			if !fs.hasClient(req.ClientId, req.ClientEpoch) {
-				return false
-			}
-			return true
+			return fs.hasClient(req.ClientId, req.ClientEpoch)
 		}, eachLogEntryFn)
 		if readInMemoryLogErr != nil {
 			if readInMemoryLogErr == log_buffer.ResumeFromDiskError {
diff --git a/weed/util/log_buffer/log_buffer.go b/weed/util/log_buffer/log_buffer.go
index efe42176e..30498f92d 100644
--- a/weed/util/log_buffer/log_buffer.go
+++ b/weed/util/log_buffer/log_buffer.go
@@ -2,7 +2,6 @@ package log_buffer
 
 import (
 	"bytes"
-	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -11,11 +10,12 @@ import (
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )
 
-const BufferSize = 4 * 1024 * 1024
-const PreviousBufferCount = 3
+const BufferSize = 8 * 1024 * 1024
+const PreviousBufferCount = 32
 
 type dataToFlush struct {
 	startTime time.Time
diff --git a/weed/util/time.go b/weed/util/time.go
new file mode 100644
index 000000000..8e237b72d
--- /dev/null
+++ b/weed/util/time.go
@@ -0,0 +1,13 @@
+package util
+
+import (
+	"time"
+)
+
+func GetNextDayTsNano(curTs int64) int64 {
+	curTime := time.Unix(0, curTs)
+	nextDay := curTime.AddDate(0, 0, 1).Truncate(24 * time.Hour)
+	nextDayNano := nextDay.UnixNano()
+
+	return nextDayNano
+}