diff --git a/internal/msgstream/msgstream_mock.go b/internal/msgstream/msgstream_mock.go
new file mode 100644
index 0000000000..146390adbe
--- /dev/null
+++ b/internal/msgstream/msgstream_mock.go
@@ -0,0 +1,65 @@
+package msgstream
+
+import "sync"
+
+type SimpleMsgStream struct {
+	msgChan chan *MsgPack
+
+	msgCount    int
+	msgCountMtx sync.RWMutex
+}
+
+func (ms *SimpleMsgStream) Start() {
+}
+
+func (ms *SimpleMsgStream) Close() {
+}
+
+func (ms *SimpleMsgStream) Chan() <-chan *MsgPack {
+	return ms.msgChan
+}
+
+func (ms *SimpleMsgStream) AsProducer(channels []string) {
+}
+
+func (ms *SimpleMsgStream) AsConsumer(channels []string, subName string) {
+}
+
+func (ms *SimpleMsgStream) SetRepackFunc(repackFunc RepackFunc) {
+}
+
+func (ms *SimpleMsgStream) Produce(pack *MsgPack) error {
+	ms.msgCountMtx.Lock()
+	defer ms.msgCountMtx.Unlock()
+
+	ms.msgChan <- pack
+	ms.msgCount++
+
+	return nil
+}
+
+func (ms *SimpleMsgStream) Broadcast(pack *MsgPack) error {
+	return nil
+}
+
+func (ms *SimpleMsgStream) Consume() *MsgPack {
+	ms.msgCountMtx.RLock()
+	defer ms.msgCountMtx.RUnlock()
+
+	if ms.msgCount <= 0 {
+		return nil
+	}
+
+	return <-ms.msgChan
+}
+
+func (ms *SimpleMsgStream) Seek(offset *MsgPosition) error {
+	return nil
+}
+
+func NewSimpleMsgStream() *SimpleMsgStream {
+	return &SimpleMsgStream{
+		msgChan:  make(chan *MsgPack, 1024),
+		msgCount: 0,
+	}
+}
diff --git a/internal/proxynode/task_scheduler.go b/internal/proxynode/task_scheduler.go
index 13d380083e..9f2ec6acaf 100644
--- a/internal/proxynode/task_scheduler.go
+++ b/internal/proxynode/task_scheduler.go
@@ -20,7 +20,7 @@ import (
 
 type TaskQueue interface {
 	utChan() <-chan int
-	UTEmpty() bool
+	utEmpty() bool
 	utFull() bool
 	addUnissuedTask(t task) error
 	FrontUnissuedTask() task
@@ -50,7 +50,7 @@ func (queue *BaseTaskQueue) utChan() <-chan int {
 	return queue.utBufChan
 }
 
-func (queue *BaseTaskQueue) UTEmpty() bool {
+func (queue *BaseTaskQueue) utEmpty() bool {
 	queue.utLock.Lock()
 	defer queue.utLock.Unlock()
 	return queue.unissuedTasks.Len() == 0
@@ -343,7 +343,7 @@ func (sched *TaskScheduler) definitionLoop() {
 		case <-sched.ctx.Done():
 			return
 		case <-sched.DdQueue.utChan():
-			if !sched.DdQueue.UTEmpty() {
+			if !sched.DdQueue.utEmpty() {
 				t := sched.scheduleDdTask()
 				sched.processTask(t, sched.DdQueue)
 			}
@@ -358,7 +358,7 @@ func (sched *TaskScheduler) manipulationLoop() {
 		case <-sched.ctx.Done():
 			return
 		case <-sched.DmQueue.utChan():
-			if !sched.DmQueue.UTEmpty() {
+			if !sched.DmQueue.utEmpty() {
 				t := sched.scheduleDmTask()
 				go sched.processTask(t, sched.DmQueue)
 			}
@@ -374,7 +374,7 @@ func (sched *TaskScheduler) queryLoop() {
 		case <-sched.ctx.Done():
 			return
 		case <-sched.DqQueue.utChan():
-			if !sched.DqQueue.UTEmpty() {
+			if !sched.DqQueue.utEmpty() {
 				t := sched.scheduleDqTask()
 				go sched.processTask(t, sched.DqQueue)
 			} else {
diff --git a/internal/proxyservice/timesync_test.go b/internal/proxyservice/timesync_test.go
new file mode 100644
index 0000000000..19a66ce1c3
--- /dev/null
+++ b/internal/proxyservice/timesync_test.go
@@ -0,0 +1,192 @@
+package proxyservice
+
+import (
+	"context"
+	"math"
+	"testing"
+	"time"
+
+	"github.com/zilliztech/milvus-distributed/internal/log"
+	"go.uber.org/zap"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/internalpb"
+
+	"github.com/zilliztech/milvus-distributed/internal/msgstream"
+)
+
+func ttStreamProduceLoop(ctx context.Context, ttStream msgstream.MsgStream, durationInterval time.Duration, sourceID int64) {
+	log.Debug("ttStreamProduceLoop", zap.Any("durationInterval", durationInterval))
+	timer := time.NewTicker(durationInterval)
+
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-timer.C:
+				ttMsgs := &msgstream.MsgPack{
+					BeginTs:        0,
+					EndTs:          0,
+					Msgs:           nil,
+					StartPositions: nil,
+					EndPositions:   nil,
+				}
+
+				currentT := uint64(time.Now().Nanosecond())
+				msg := &msgstream.TimeTickMsg{
+					BaseMsg: msgstream.BaseMsg{
+						Ctx:            ctx,
+						BeginTimestamp: 0,
+						EndTimestamp:   0,
+						HashValues:     nil,
+						MsgPosition:    nil,
+					},
+					TimeTickMsg: internalpb.TimeTickMsg{
+						Base: &commonpb.MsgBase{
+							MsgType:   0,
+							MsgID:     0,
+							Timestamp: currentT,
+							SourceID:  sourceID,
+						},
+					},
+				}
+
+				ttMsgs.Msgs = append(ttMsgs.Msgs, msg)
+
+				_ = ttStream.Produce(ttMsgs)
+				//log.Debug("ttStreamProduceLoop", zap.Any("Send", currentT))
+			}
+		}
+	}()
+}
+
+func TestSoftTimeTickBarrier_Start(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	err := ttBarrier.Start()
+	assert.Equal(t, nil, err)
+	defer ttBarrier.Close()
+}
+
+func TestSoftTimeTickBarrier_Close(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	err := ttBarrier.Start()
+	assert.Equal(t, nil, err)
+	defer ttBarrier.Close()
+}
+
+func TestSoftTimeTickBarrier_GetTimeTick(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	err := ttBarrier.Start()
+	assert.Equal(t, nil, err)
+	defer ttBarrier.Close()
+
+	num := 10
+	for i := 0; i < num; i++ {
+		tick, err := ttBarrier.GetTimeTick()
+		assert.Equal(t, nil, err)
+		log.Debug("TestSoftTimeTickBarrier", zap.Any("GetTimeTick", tick))
+	}
+}
+
+func TestSoftTimeTickBarrier_AddPeer(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	err := ttBarrier.Start()
+	assert.Equal(t, nil, err)
+	defer ttBarrier.Close()
+
+	newSourceID := UniqueID(2)
+	err = ttBarrier.AddPeer(newSourceID)
+	assert.Equal(t, nil, err)
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, newSourceID)
+
+	num := 10
+	for i := 0; i < num; i++ {
+		tick, err := ttBarrier.GetTimeTick()
+		assert.Equal(t, nil, err)
+		log.Debug("TestSoftTimeTickBarrier", zap.Any("GetTimeTick", tick))
+	}
+}
+
+func TestSoftTimeTickBarrier_TickChan(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	err := ttBarrier.Start()
+	assert.Equal(t, nil, err)
+	defer ttBarrier.Close()
+
+	duration := time.Second
+	timer := time.NewTimer(duration)
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-timer.C:
+			return
+		case ts := <-ttBarrier.TickChan():
+			log.Debug("TestSoftTimeTickBarrier", zap.Any("GetTimeTick", ts))
+		}
+	}
+}
diff --git a/internal/proxyservice/timetick_test.go b/internal/proxyservice/timetick_test.go
new file mode 100644
index 0000000000..9f0c2b6cc6
--- /dev/null
+++ b/internal/proxyservice/timetick_test.go
@@ -0,0 +1,55 @@
+package proxyservice
+
+import (
+	"context"
+	"math"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/zilliztech/milvus-distributed/internal/msgstream"
+)
+
+func TestTimeTick_Start(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	channels := msgstream.NewSimpleMsgStream()
+
+	tick := newTimeTick(ctx, ttBarrier, channels)
+	err := tick.Start()
+	assert.Equal(t, nil, err)
+	defer tick.Close()
+}
+
+func TestTimeTick_Close(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ttStream := msgstream.NewSimpleMsgStream()
+	sourceID := 1
+	peerIds := []UniqueID{UniqueID(sourceID)}
+	interval := 100
+	minTtInterval := Timestamp(interval)
+
+	durationInterval := time.Duration(interval*int(math.Pow10(6))) >> 18
+	ttStreamProduceLoop(ctx, ttStream, durationInterval, int64(sourceID))
+
+	ttBarrier := newSoftTimeTickBarrier(ctx, ttStream, peerIds, minTtInterval)
+	channels := msgstream.NewSimpleMsgStream()
+
+	tick := newTimeTick(ctx, ttBarrier, channels)
+	err := tick.Start()
+	assert.Equal(t, nil, err)
+	defer tick.Close()
+}