diff --git a/unmaintained/volume_tailer/volume_tailer.go b/unmaintained/volume_tailer/volume_tailer.go
index 22c3ebab4..8a662ef5e 100644
--- a/unmaintained/volume_tailer/volume_tailer.go
+++ b/unmaintained/volume_tailer/volume_tailer.go
@@ -10,6 +10,7 @@ import (
 	weed_server "github.com/chrislusf/seaweedfs/weed/server"
 	"github.com/chrislusf/seaweedfs/weed/storage"
 	"github.com/spf13/viper"
+	"golang.org/x/tools/godoc/util"
 
 	"io"
 	"log"
@@ -19,6 +20,7 @@ var (
 	master         = flag.String("master", "localhost:9333", "master server host and port")
 	volumeId       = flag.Int("volumeId", -1, "a volume id")
 	timeoutSeconds = flag.Int("timeoutSeconds", 0, "disconnect if no activity after these seconds")
+	showTextFile   = flag.Bool("showTextFile", false, "display textual file content")
 )
 
 func main() {
@@ -59,7 +61,51 @@ func main() {
 				}
 			}
 
-			println("header:", len(resp.NeedleHeader), "body:", len(resp.NeedleBody))
+			needleHeader := resp.NeedleHeader
+			needleBody := resp.NeedleBody
+
+			if len(needleHeader) == 0 {
+				continue
+			}
+
+			for !resp.IsLastChunk {
+				resp, recvErr = stream.Recv()
+				if recvErr != nil {
+					if recvErr == io.EOF {
+						break
+					} else {
+						return recvErr
+					}
+				}
+				needleBody = append(needleBody, resp.NeedleBody...)
+			}
+
+			n := new(storage.Needle)
+			n.ParseNeedleHeader(needleHeader)
+			n.ReadNeedleBodyBytes(needleBody, storage.CurrentVersion)
+
+			if n.Size == 0 {
+				println("-", n.String())
+				continue
+			} else {
+				println("+", n.String())
+			}
+
+			if *showTextFile {
+
+				data := n.Data
+				if n.IsGzipped() {
+					if data, err = operation.UnGzipData(data); err != nil {
+						continue
+					}
+				}
+				if util.IsText(data) {
+					println(string(data))
+				}
+
+				println("-", n.String(), "compressed", n.IsGzipped(), "original size", len(data))
+			}
+
 		}
 
 		return nil
@@ -70,5 +116,4 @@ func main() {
 		log.Printf("Error VolumeTail volume %d: %v", vid, err)
 	}
 
-
 }
diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index 949eeb49a..70f391959 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -174,6 +174,7 @@ message VolumeTailRequest {
 message VolumeTailResponse {
     bytes needle_header = 1;
     bytes needle_body = 2;
+    bool is_last_chunk = 3;
 }
 
 message ReadVolumeFileStatusRequest {
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index bb7711865..4df6db272 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -671,6 +671,7 @@ func (m *VolumeTailRequest) GetDrainingSeconds() uint32 {
 type VolumeTailResponse struct {
 	NeedleHeader []byte `protobuf:"bytes,1,opt,name=needle_header,json=needleHeader,proto3" json:"needle_header,omitempty"`
 	NeedleBody   []byte `protobuf:"bytes,2,opt,name=needle_body,json=needleBody,proto3" json:"needle_body,omitempty"`
+	IsLastChunk  bool   `protobuf:"varint,3,opt,name=is_last_chunk,json=isLastChunk" json:"is_last_chunk,omitempty"`
 }
 
 func (m *VolumeTailResponse) Reset()                    { *m = VolumeTailResponse{} }
@@ -692,6 +693,13 @@ func (m *VolumeTailResponse) GetNeedleBody() []byte {
 	return nil
 }
 
+func (m *VolumeTailResponse) GetIsLastChunk() bool {
+	if m != nil {
+		return m.IsLastChunk
+	}
+	return false
+}
+
 type ReadVolumeFileStatusRequest struct {
 	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
 }
@@ -1563,86 +1571,87 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("volume_server.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	0xad, 0xc9, 0xaa, 0xb3, 0xa4, 0x5d, 0xa3, 0x8b, 0xb0, 0xc4, 0x05, 0x11, 0x09, 0x1f, 0x9d, 0x19,
+	0x5b, 0x93, 0x45, 0xc7, 0x7c, 0xa1, 0x75, 0x58, 0xa4, 0x71, 0x1c, 0xc5, 0xa3, 0x8e, 0x52, 0xd7,
+	0x1f, 0x08, 0x41, 0x97, 0xb3, 0x5f, 0xe8, 0xa8, 0x3b, 0xb6, 0x26, 0x03, 0x47, 0xad, 0xf1, 0x32,
+	0x2c, 0x7e, 0x33, 0x9d, 0x89, 0x63, 0xfc, 0x39, 0x8c, 0x5e, 0x11, 0x2f, 0x49, 0xa6, 0xaf, 0x54,
+	0x8c, 0x5b, 0x87, 0xd4, 0x3b, 0x4a, 0x73, 0xbf, 0x0c, 0xab, 0x26, 0x72, 0x13, 0xc1, 0xc0, 0x59,
+	0xd1, 0x82, 0x1d, 0x1f, 0x7f, 0x05, 0x97, 0x6a, 0x0c, 0x4d, 0x0d, 0x6e, 0xc0, 0xe0, 0x80, 0xc4,
+	0x7b, 0xe4, 0x80, 0xba, 0x31, 0x11, 0x2c, 0x52, 0xd6, 0x96, 0xd3, 0x37, 0x42, 0x47, 0xca, 0xf0,
+	0x6b, 0xb0, 0x0b, 0x08, 0xd1, 0x74, 0x46, 0x3c, 0xd1, 0xc6, 0x39, 0x1a, 0x43, 0x6f, 0x16, 0x53,
+	0x12, 0x04, 0x91, 0x47, 0x04, 0x55, 0x55, 0xe8, 0x38, 0x79, 0x11, 0xbe, 0x0a, 0x97, 0x6b, 0xc1,
+	0x75, 0x80, 0xf8, 0x71, 0x29, 0xfa, 0x68, 0x3a, 0x65, 0xad, 0x5c, 0xe3, 0x2b, 0x95, 0xa8, 0x95,
+	0xa5, 0xc1, 0xfd, 0xa2, 0xb4, 0x1b, 0x50, 0x12, 0x26, 0xb3, 0x56, 0xc0, 0xe5, 0x88, 0x53, 0xd3,
+	0x0c, 0x79, 0x43, 0x37, 0xc7, 0x56, 0x14, 0x04, 0xd4, 0x13, 0x2c, 0x0a, 0x53, 0xd8, 0x6b, 0x00,
+	0x5e, 0x26, 0x34, 0xad, 0x92, 0x93, 0x60, 0x1b, 0x46, 0x55, 0x53, 0x03, 0xfb, 0xa7, 0x05, 0x17,
+	0xbe, 0x36, 0x45, 0xd3, 0x8e, 0x5b, 0x1d, 0x40, 0xd1, 0xe5, 0x99, 0xb2, 0xcb, 0xf2, 0x01, 0x75,
+	0x2a, 0x07, 0x24, 0x35, 0x62, 0x3a, 0x0b, 0x98, 0x47, 0x14, 0x44, 0x57, 0x41, 0xe4, 0x45, 0x68,
+	0x08, 0x1d, 0x21, 0x82, 0xd1, 0xa2, 0xda, 0x91, 0x4b, 0x3c, 0x82, 0x8b, 0xe5, 0x58, 0x4d, 0x1a,
+	0x9f, 0xc1, 0x86, 0x96, 0xec, 0x1e, 0x87, 0xde, 0xae, 0xba, 0x0d, 0xad, 0x8a, 0xfe, 0xb7, 0x05,
+	0xa3, 0xaa, 0xa1, 0xe9, 0xe2, 0x0f, 0xad, 0xc0, 0xfb, 0xe6, 0x87, 0xfe, 0x07, 0x3d, 0x41, 0x58,
+	0xe0, 0x46, 0xfb, 0xfb, 0x9c, 0x8a, 0xd1, 0xd2, 0xd8, 0x9a, 0x74, 0x1d, 0x90, 0xa2, 0xe7, 0x4a,
+	0x82, 0xee, 0xc0, 0xd0, 0xd3, 0x9d, 0xec, 0xc6, 0xf4, 0x2d, 0xe3, 0x12, 0x79, 0x59, 0x05, 0x76,
+	0xce, 0x4b, 0x3b, 0x5c, 0x8b, 0x11, 0x86, 0x01, 0xf3, 0xdf, 0xb9, 0x6a, 0x80, 0xa8, 0xeb, 0xbf,
+	0xa2, 0xd0, 0x7a, 0xcc, 0x7f, 0xf7, 0x2d, 0x0b, 0xe8, 0xae, 0x9c, 0x02, 0xaf, 0xe0, 0x8a, 0x4e,
+	0x7e, 0x27, 0xf4, 0x62, 0x3a, 0xa5, 0xa1, 0x20, 0xc1, 0x56, 0x34, 0x3b, 0x6e, 0xd5, 0x02, 0x97,
+	0x60, 0x85, 0xb3, 0xd0, 0xa3, 0x6e, 0xa8, 0xc7, 0x50, 0xd7, 0x59, 0x56, 0xdf, 0xcf, 0x38, 0x7e,
+	0x02, 0x57, 0x1b, 0x70, 0x4d, 0x65, 0xaf, 0x43, 0x5f, 0x05, 0xe6, 0x45, 0xa1, 0xa0, 0xa1, 0x50,
+	0xd8, 0x7d, 0xa7, 0x27, 0x65, 0x5b, 0x5a, 0x84, 0x3f, 0x01, 0xa4, 0x31, 0x9e, 0x46, 0x49, 0xd8,
+	0xee, 0x6a, 0x5e, 0x80, 0xb5, 0x82, 0x89, 0xe9, 0x8d, 0x47, 0xb0, 0xae, 0xc5, 0x2f, 0xc3, 0x69,
+	0x6b, 0xac, 0x0d, 0xb8, 0x50, 0x32, 0x32, 0x68, 0x0f, 0x53, 0x27, 0xc5, 0x77, 0xe2, 0x54, 0xb0,
+	0x8b, 0x69, 0x04, 0xc5, 0xa7, 0x02, 0xff, 0x65, 0xc1, 0xf9, 0x74, 0x8c, 0xb4, 0xac, 0xfa, 0x7b,
+	0xb6, 0x5d, 0xa7, 0xb1, 0xed, 0xba, 0x27, 0x6d, 0x37, 0x81, 0x21, 0x8f, 0x92, 0xd8, 0xa3, 0xae,
+	0x4f, 0x04, 0x71, 0xc3, 0xc8, 0xa7, 0xa6, 0x2b, 0xcf, 0x6a, 0xf9, 0x36, 0x11, 0xe4, 0x59, 0xe4,
+	0x53, 0xbc, 0x9e, 0x1e, 0x4a, 0xfe, 0x34, 0x71, 0x08, 0xe7, 0xe4, 0xb7, 0x6c, 0xab, 0x96, 0x39,
+	0xf4, 0x18, 0x77, 0xd3, 0xee, 0x54, 0x49, 0xac, 0x38, 0xab, 0x8c, 0xef, 0xe8, 0xd6, 0x34, 0xfb,
+	0x3e, 0x11, 0x7a, 0xbf, 0x93, 0xee, 0x6f, 0x13, 0x21, 0xf7, 0xf1, 0xa7, 0x30, 0x3c, 0xf1, 0xd7,
+	0xbe, 0xa3, 0x92, 0xb4, 0xd8, 0x2f, 0x08, 0x0b, 0x3e, 0xb0, 0xc5, 0xd1, 0x04, 0xce, 0xf9, 0x31,
+	0x61, 0x21, 0x0b, 0x0f, 0x76, 0xa9, 0x17, 0x85, 0x3e, 0x57, 0x71, 0x0e, 0x9c, 0xb2, 0x18, 0xff,
+	0x96, 0xd6, 0x4c, 0xbb, 0x3d, 0x79, 0x21, 0x43, 0x4a, 0xfd, 0x80, 0xba, 0x87, 0x94, 0xf8, 0x34,
+	0x36, 0x01, 0xf7, 0xb5, 0xf0, 0x3b, 0x25, 0x93, 0xf3, 0xc0, 0x28, 0xed, 0x45, 0xfe, 0xb1, 0x0a,
+	0xa1, 0xef, 0x80, 0x16, 0x3d, 0x89, 0xfc, 0x63, 0x75, 0xc9, 0xb9, 0x1b, 0x10, 0x2e, 0x5c, 0xef,
+	0x30, 0x09, 0x8f, 0x4c, 0xad, 0x7a, 0x8c, 0x7f, 0x4f, 0xb8, 0xd8, 0x92, 0x22, 0xfc, 0x25, 0x5c,
+	0x76, 0x28, 0xf1, 0x75, 0x0c, 0xea, 0xea, 0xb7, 0x1f, 0x8f, 0xff, 0x58, 0x70, 0xa5, 0xde, 0xb8,
+	0xcd, 0x88, 0xbc, 0x0f, 0x28, 0x1b, 0x41, 0x82, 0x4d, 0x29, 0x17, 0x64, 0x3a, 0x33, 0x85, 0x1c,
+	0x9a, 0x39, 0xf4, 0x22, 0x95, 0x57, 0x07, 0x56, 0xa7, 0x32, 0xb0, 0x24, 0x62, 0xda, 0x16, 0x39,
+	0xc4, 0xae, 0x46, 0xf4, 0x75, 0x7b, 0x14, 0x10, 0x33, 0x6d, 0x85, 0xb8, 0xa8, 0x11, 0x8d, 0xa2,
+	0x42, 0xbc, 0x0a, 0x60, 0xfa, 0x26, 0x09, 0xd3, 0x89, 0xbb, 0xaa, 0xbb, 0x26, 0x09, 0x05, 0xfe,
+	0x01, 0x60, 0x9b, 0xf1, 0x23, 0x9d, 0xb5, 0xbc, 0x3a, 0x3e, 0x8b, 0xcd, 0x0b, 0x2b, 0x97, 0x52,
+	0x42, 0x82, 0xc0, 0xe4, 0x24, 0x97, 0x92, 0x6d, 0x25, 0x9c, 0xfa, 0x26, 0x7a, 0xb5, 0x96, 0xb2,
+	0xfd, 0x98, 0x52, 0x13, 0xa8, 0x5a, 0xe3, 0xdf, 0x2d, 0x58, 0x7d, 0x4a, 0xa7, 0x06, 0xf9, 0x1a,
+	0xc0, 0x41, 0x14, 0x47, 0x89, 0x60, 0x21, 0xe5, 0xca, 0xc1, 0xa2, 0x93, 0x93, 0xfc, 0x77, 0x3f,
+	0x8a, 0xfd, 0xd1, 0x60, 0xdf, 0xe4, 0xae, 0xd6, 0x52, 0x76, 0x48, 0xc9, 0xcc, 0xa4, 0xab, 0xd6,
+	0x92, 0x3b, 0x72, 0x41, 0xbc, 0x23, 0xf5, 0x9e, 0x74, 0x1d, 0xfd, 0xf1, 0xf0, 0x8f, 0x01, 0xf4,
+	0xcd, 0xfb, 0xa8, 0xc8, 0x2b, 0xfa, 0x09, 0x7a, 0x39, 0xd2, 0x8b, 0x6e, 0x56, 0xb9, 0x6d, 0x95,
+	0x44, 0xdb, 0xff, 0x9f, 0xa3, 0x65, 0xe6, 0xc8, 0x02, 0x0a, 0xe1, 0x7c, 0x85, 0x54, 0xa2, 0xbb,
+	0x55, 0xeb, 0x26, 0xca, 0x6a, 0xdf, 0x6b, 0xa5, 0x9b, 0xf9, 0x13, 0xb0, 0x56, 0xc3, 0x12, 0xd1,
+	0xfd, 0x39, 0x28, 0x05, 0xa6, 0x6a, 0x7f, 0xd4, 0x52, 0x3b, 0xf3, 0xfa, 0x06, 0x50, 0x95, 0x42,
+	0xa2, 0x7b, 0x73, 0x61, 0x4e, 0x28, 0xaa, 0x7d, 0xbf, 0x9d, 0x72, 0x63, 0xa2, 0x9a, 0x5c, 0xce,
+	0x4d, 0xb4, 0x40, 0x5f, 0xe7, 0x26, 0x5a, 0x62, 0xac, 0x0b, 0xe8, 0x08, 0x86, 0x65, 0xe2, 0x89,
+	0xee, 0x34, 0xfd, 0x1a, 0xaa, 0xf0, 0x5a, 0xfb, 0x6e, 0x1b, 0xd5, 0xcc, 0x19, 0x85, 0xb3, 0x45,
+	0x72, 0x88, 0x6e, 0x57, 0xed, 0x6b, 0xa9, 0xae, 0x3d, 0x99, 0xaf, 0x98, 0xcf, 0xa9, 0x4c, 0x18,
+	0xeb, 0x72, 0x6a, 0x60, 0xa3, 0x75, 0x39, 0x35, 0xf1, 0x4f, 0xbc, 0x80, 0x7e, 0x4d, 0x59, 0x48,
+	0x89, 0x48, 0xa1, 0xcd, 0x26, 0x98, 0x7a, 0x26, 0x67, 0x3f, 0x68, 0xad, 0x9f, 0xfa, 0xfe, 0xd8,
+	0x92, 0x77, 0x3d, 0xc7, 0xa7, 0xea, 0xee, 0x7a, 0x95, 0xa1, 0xd5, 0xdd, 0xf5, 0x3a, 0x52, 0xb6,
+	0x80, 0xf6, 0x60, 0x50, 0x60, 0x58, 0xe8, 0x56, 0x93, 0x65, 0x91, 0xb7, 0xd9, 0xb7, 0xe7, 0xea,
+	0x65, 0x3e, 0xdc, 0x74, 0x7a, 0x99, 0x71, 0xd5, 0x18, 0x5c, 0x71, 0x5e, 0xdd, 0x9a, 0xa7, 0x96,
+	0x39, 0xf8, 0x11, 0xe0, 0x84, 0x10, 0xa1, 0x1b, 0x4d, 0x76, 0xf9, 0xa3, 0xb8, 0x79, 0xba, 0x52,
+	0x06, 0xfd, 0x33, 0xac, 0xd7, 0x3d, 0xbd, 0xa8, 0xe6, 0x16, 0x9e, 0xf2, 0xbe, 0xdb, 0x9b, 0x6d,
+	0xd5, 0x33, 0xc7, 0x2f, 0x61, 0x25, 0xa5, 0x57, 0xe8, 0x7a, 0xd5, 0xba, 0x44, 0xf5, 0x6c, 0x7c,
+	0x9a, 0x4a, 0xae, 0x9b, 0x5e, 0xa7, 0xa5, 0x92, 0x3c, 0xa8, 0xb9, 0x54, 0x39, 0x72, 0xd6, 0x5c,
+	0xaa, 0x3c, 0x95, 0x92, 0xe0, 0x7b, 0x4b, 0xea, 0x5f, 0x9d, 0x47, 0xff, 0x06, 0x00, 0x00, 0xff,
+	0xff, 0x71, 0xd9, 0xf3, 0x7e, 0xec, 0x11, 0x00, 0x00,
 }
diff --git a/weed/server/volume_grpc_stream_follow.go b/weed/server/volume_grpc_tail.go
similarity index 77%
rename from weed/server/volume_grpc_stream_follow.go
rename to weed/server/volume_grpc_tail.go
index 52a9c1473..da248498f 100644
--- a/weed/server/volume_grpc_stream_follow.go
+++ b/weed/server/volume_grpc_tail.go
@@ -30,6 +30,7 @@ func (vs *VolumeServer) VolumeTail(req *volume_server_pb.VolumeTailRequest, stre
 		time.Sleep(2 * time.Second)
 
 		if req.DrainingSeconds == 0 {
+			lastTimestampNs = lastProcessedTimestampNs
 			continue
 		}
 		if lastProcessedTimestampNs == lastTimestampNs {
@@ -59,18 +60,31 @@ func sendNeedlesSince(stream volume_server_pb.VolumeServer_VolumeTailServer, v *
 
 	if isLastOne {
 		// need to heart beat to the client to ensure the connection health
-		sendErr := stream.Send(&volume_server_pb.VolumeTailResponse{})
+		sendErr := stream.Send(&volume_server_pb.VolumeTailResponse{IsLastChunk: true})
 		return lastTimestampNs, sendErr
 	}
 
 	err = storage.ScanVolumeFileNeedleFrom(v.Version(), v.DataFile(), foundOffset.ToAcutalOffset(), func(needleHeader, needleBody []byte, needleAppendAtNs uint64) error {
 
-		sendErr := stream.Send(&volume_server_pb.VolumeTailResponse{
-			NeedleHeader: needleHeader,
-			NeedleBody:   needleBody,
-		})
-		if sendErr != nil {
-			return sendErr
+		blockSizeLimit := 1024 * 1024 * 2
+		isLastChunk := false
+
+		// need to send body by chunks
+		for i := 0; i < len(needleBody); i += blockSizeLimit {
+			stopOffset := i + blockSizeLimit
+			if stopOffset >= len(needleBody) {
+				isLastChunk = true
+				stopOffset = len(needleBody)
+			}
+
+			sendErr := stream.Send(&volume_server_pb.VolumeTailResponse{
+				NeedleHeader: needleHeader,
+				NeedleBody:   needleBody[i:stopOffset],
+				IsLastChunk:  isLastChunk,
+			})
+			if sendErr != nil {
+				return sendErr
+			}
 		}
 
 		lastProcessedTimestampNs = needleAppendAtNs
diff --git a/weed/storage/needle_read_write.go b/weed/storage/needle_read_write.go
index 6e709d6c2..1a2c99450 100644
--- a/weed/storage/needle_read_write.go
+++ b/weed/storage/needle_read_write.go
@@ -304,28 +304,35 @@ func (n *Needle) ReadNeedleBody(r *os.File, version Version, offset int64, bodyL
 	if bodyLength <= 0 {
 		return nil, nil
 	}
+	bytes = make([]byte, bodyLength)
+	if _, err = r.ReadAt(bytes, offset); err != nil {
+		return
+	}
+
+	err = n.ReadNeedleBodyBytes(bytes, version)
+
+	return
+}
+
+func (n *Needle) ReadNeedleBodyBytes(needleBody []byte, version Version) (err error) {
+
+	if len(needleBody) <= 0 {
+		return nil
+	}
 	switch version {
 	case Version1:
-		bytes = make([]byte, bodyLength)
-		if _, err = r.ReadAt(bytes, offset); err != nil {
-			return
-		}
-		n.Data = bytes[:n.Size]
+		n.Data = needleBody[:n.Size]
 		n.Checksum = NewCRC(n.Data)
 	case Version2, Version3:
-		bytes = make([]byte, bodyLength)
-		if _, err = r.ReadAt(bytes, offset); err != nil {
-			return
-		}
-		err = n.readNeedleDataVersion2(bytes[0:n.Size])
+		err = n.readNeedleDataVersion2(needleBody[0:n.Size])
 		n.Checksum = NewCRC(n.Data)
 
 		if version == Version3 {
 			tsOffset := n.Size + NeedleChecksumSize
-			n.AppendAtNs = util.BytesToUint64(bytes[tsOffset : tsOffset+TimestampSize])
+			n.AppendAtNs = util.BytesToUint64(needleBody[tsOffset : tsOffset+TimestampSize])
 		}
 	default:
-		err = fmt.Errorf("Unsupported Version! (%d)", version)
+		err = fmt.Errorf("unsupported version %d!", version)
 	}
 	return
 }