diff --git a/weed/mq/balancer/balancer.go b/weed/mq/balancer/balancer.go
index 258b29f2f..d93cc8de8 100644
--- a/weed/mq/balancer/balancer.go
+++ b/weed/mq/balancer/balancer.go
@@ -49,10 +49,8 @@ func (bs *BrokerStats) UpdateStats(stats *mq_pb.BrokerStats) {
 	for _, topicPartitionStats := range stats.Stats {
 		tps := &TopicPartitionStats{
 			TopicPartition: topic.TopicPartition{
-				Namespace:  topicPartitionStats.Topic.Namespace,
-				Topic:      topicPartitionStats.Topic.Name,
-				RangeStart: topicPartitionStats.Partition.RangeStart,
-				RangeStop:  topicPartitionStats.Partition.RangeStop,
+				Topic:     topic.Topic{Namespace: topicPartitionStats.Topic.Namespace, Name: topicPartitionStats.Topic.Name},
+				Partition: topic.Partition{RangeStart: topicPartitionStats.Partition.RangeStart, RangeStop: topicPartitionStats.Partition.RangeStop, RingSize: topicPartitionStats.Partition.RingSize},
 			},
 			ConsumerCount: topicPartitionStats.ConsumerCount,
 			IsLeader:      topicPartitionStats.IsLeader,
@@ -73,10 +71,8 @@ func (bs *BrokerStats) UpdateStats(stats *mq_pb.BrokerStats) {
 func (bs *BrokerStats) RegisterAssignment(t *mq_pb.Topic, partition *mq_pb.Partition) {
 	tps := &TopicPartitionStats{
 		TopicPartition: topic.TopicPartition{
-			Namespace:  t.Namespace,
-			Topic:      t.Name,
-			RangeStart: partition.RangeStart,
-			RangeStop:  partition.RangeStop,
+			Topic:     topic.Topic{Namespace: t.Namespace, Name: t.Name},
+			Partition: topic.Partition{RangeStart: partition.RangeStart, RangeStop: partition.RangeStop},
 		},
 		ConsumerCount: 0,
 		IsLeader:      true,
diff --git a/weed/mq/balancer/lookup.go b/weed/mq/balancer/lookup.go
index 7362fbab7..d5b78fc45 100644
--- a/weed/mq/balancer/lookup.go
+++ b/weed/mq/balancer/lookup.go
@@ -16,7 +16,7 @@ func (b *Balancer) LookupOrAllocateTopicPartitions(topic *mq_pb.Topic, publish b
 		for topicPartitionStatsItem := range brokerStats.Stats.IterBuffered() {
 			topicPartitionStat := topicPartitionStatsItem.Val
 			if topicPartitionStat.TopicPartition.Namespace == topic.Namespace &&
-				topicPartitionStat.TopicPartition.Topic == topic.Name {
+				topicPartitionStat.TopicPartition.Name == topic.Name {
 				assignment := &mq_pb.BrokerPartitionAssignment{
 					Partition: &mq_pb.Partition{
 						RingSize:   MaxPartitionCount,
diff --git a/weed/mq/broker/broker_grpc_lookup.go b/weed/mq/broker/broker_grpc_lookup.go
index 93586e22d..74a3a9822 100644
--- a/weed/mq/broker/broker_grpc_lookup.go
+++ b/weed/mq/broker/broker_grpc_lookup.go
@@ -70,7 +70,7 @@ func (broker *MessageQueueBroker) ListTopics(ctx context.Context, request *mq_pb
 			topicPartitionStat := topicPartitionStatsItem.Val
 			topic := &mq_pb.Topic{
 				Namespace: topicPartitionStat.TopicPartition.Namespace,
-				Name:      topicPartitionStat.TopicPartition.Topic,
+				Name:      topicPartitionStat.TopicPartition.Name,
 			}
 			topicKey := fmt.Sprintf("%s/%s", topic.Namespace, topic.Name)
 			if _, found := knownTopics[topicKey]; found {
diff --git a/weed/mq/topic/local_manager.go b/weed/mq/topic/local_manager.go
index e3ee46a1e..0c54f2bb1 100644
--- a/weed/mq/topic/local_manager.go
+++ b/weed/mq/topic/local_manager.go
@@ -75,10 +75,12 @@ func (manager *LocalTopicManager) CollectStats(duration time.Duration) *mq_pb.Br
 	manager.topics.IterCb(func(topic string, localTopic *LocalTopic) {
 		for _, localPartition := range localTopic.Partitions {
 			topicPartition := &TopicPartition{
-				Namespace:  string(localTopic.Namespace),
-				Topic:      localTopic.Name,
-				RangeStart: localPartition.RangeStart,
-				RangeStop:  localPartition.RangeStop,
+				Topic: Topic{Namespace: localTopic.Namespace, Name: localTopic.Name},
+				Partition: Partition{
+					RingSize:   localPartition.RingSize,
+					RangeStart: localPartition.RangeStart,
+					RangeStop:  localPartition.RangeStop,
+				},
 			}
 			stats.Stats[topicPartition.String()] = &mq_pb.TopicPartitionStats{
 				Topic: &mq_pb.Topic{
diff --git a/weed/mq/topic/topic.go b/weed/mq/topic/topic.go
index 430999179..3d457e6f1 100644
--- a/weed/mq/topic/topic.go
+++ b/weed/mq/topic/topic.go
@@ -7,14 +7,12 @@ import (
 	"time"
 )
 
-type Namespace string
-
 type Topic struct {
-	Namespace Namespace
+	Namespace string
 	Name      string
 }
 
-func NewTopic(namespace Namespace, name string) Topic {
+func NewTopic(namespace string, name string) Topic {
 	return Topic{
 		Namespace: namespace,
 		Name:      name,
@@ -22,7 +20,7 @@ func NewTopic(namespace Namespace, name string) Topic {
 }
 func FromPbTopic(topic *mq_pb.Topic) Topic {
 	return Topic{
-		Namespace: Namespace(topic.Namespace),
+		Namespace: topic.Namespace,
 		Name:      topic.Name,
 	}
 }
@@ -41,7 +39,7 @@ type Segment struct {
 func FromPbSegment(segment *mq_pb.Segment) *Segment {
 	return &Segment{
 		Topic: Topic{
-			Namespace: Namespace(segment.Namespace),
+			Namespace: segment.Namespace,
 			Name:      segment.Topic,
 		},
 		Id: segment.Id,
diff --git a/weed/mq/topic/topic_partition.go b/weed/mq/topic/topic_partition.go
index 3d927b1d8..20b33a7e4 100644
--- a/weed/mq/topic/topic_partition.go
+++ b/weed/mq/topic/topic_partition.go
@@ -3,10 +3,8 @@ package topic
 import "fmt"
 
 type TopicPartition struct {
-	Namespace  string
-	Topic      string
-	RangeStart int32
-	RangeStop  int32
+	Topic
+	Partition
 }
 
 func (tp *TopicPartition) String() string {