diff --git a/sdks/storage/shard_storage.go b/sdks/storage/shard_storage.go
index 1aeba6e..1285532 100644
--- a/sdks/storage/shard_storage.go
+++ b/sdks/storage/shard_storage.go
@@ -9,13 +9,14 @@ import (
 
 // 分片存储服务的配置数据
 type ShardStoreConfig interface {
-	GetType() string
+	GetShardStoreType() string
 	// 输出调试用的字符串，不要包含敏感信息
 	String() string
 }
 
 var _ = serder.UseTypeUnionInternallyTagged(types.Ref(types.NewTypeUnion[ShardStoreConfig](
 	(*LocalShardStorage)(nil),
+	(*S3ShardStorage)(nil),
 )), "type")
 
 type LocalShardStorage struct {
@@ -25,10 +26,24 @@ type LocalShardStorage struct {
 	MaxSize         int64  `json:"maxSize"`
 }
 
-func (s *LocalShardStorage) GetType() string {
+func (s *LocalShardStorage) GetShardStoreType() string {
 	return "Local"
 }
 
 func (s *LocalShardStorage) String() string {
 	return fmt.Sprintf("Local[root=%s, maxSize=%d]", s.Root, s.MaxSize)
 }
+
+type S3ShardStorage struct {
+	serder.Metadata `union:"S3"`
+	Type            string `json:"type"`
+	Root            string `json:"root"`
+}
+
+func (s *S3ShardStorage) GetShardStoreType() string {
+	return "S3"
+}
+
+func (s *S3ShardStorage) String() string {
+	return fmt.Sprintf("S3[root=%s]", s.Root)
+}
diff --git a/sdks/storage/storage.go b/sdks/storage/storage.go
index 440d7eb..0d1fcd8 100644
--- a/sdks/storage/storage.go
+++ b/sdks/storage/storage.go
@@ -33,13 +33,16 @@ func (s *Storage) String() string {
 
 // 存储服务地址
 type StorageType interface {
-	GetType() string
+	GetStorageType() string
 	// 输出调试用的字符串，不要包含敏感信息
 	String() string
 }
 
 var _ = serder.UseTypeUnionInternallyTagged(types.Ref(types.NewTypeUnion[StorageType](
 	(*LocalStorageType)(nil),
+	(*OBSType)(nil),
+	(*OSSType)(nil),
+	(*COSType)(nil),
 )), "type")
 
 type LocalStorageType struct {
@@ -47,7 +50,7 @@ type LocalStorageType struct {
 	Type            string `json:"type"`
 }
 
-func (a *LocalStorageType) GetType() string {
+func (a *LocalStorageType) GetStorageType() string {
 	return "Local"
 }
 
@@ -57,6 +60,7 @@ func (a *LocalStorageType) String() string {
 
 type OSSType struct {
 	serder.Metadata `union:"OSS"`
+	Type            string `json:"type"`
 	Region          string `json:"region"`
 	AK              string `json:"accessKeyId"`
 	SK              string `json:"secretAccessKey"`
@@ -64,16 +68,17 @@ type OSSType struct {
 	Bucket          string `json:"bucket"`
 }
 
-func (a *OSSType) GetType() string {
-	return "OSSAddress"
+func (a *OSSType) GetStorageType() string {
+	return "OSS"
 }
 
 func (a *OSSType) String() string {
-	return "OSSAddress"
+	return "OSS"
 }
 
-type OBSAddress struct {
-	serder.Metadata `union:"Local"`
+type OBSType struct {
+	serder.Metadata `union:"OBS"`
+	Type            string `json:"type"`
 	Region          string `json:"region"`
 	AK              string `json:"accessKeyId"`
 	SK              string `json:"secretAccessKey"`
@@ -81,16 +86,17 @@ type OBSAddress struct {
 	Bucket          string `json:"bucket"`
 }
 
-func (a *OBSAddress) GetType() string {
-	return "OBSAddress"
+func (a *OBSType) GetStorageType() string {
+	return "OBS"
 }
 
-func (a *OBSAddress) String() string {
-	return "OBSAddress"
+func (a *OBSType) String() string {
+	return "OBS"
 }
 
-type COSAddress struct {
-	serder.Metadata `union:"Local"`
+type COSType struct {
+	serder.Metadata `union:"COS"`
+	Type            string `json:"type"`
 	Region          string `json:"region"`
 	AK              string `json:"accessKeyId"`
 	SK              string `json:"secretAccessKey"`
@@ -98,10 +104,10 @@ type COSAddress struct {
 	Bucket          string `json:"bucket"`
 }
 
-func (a *COSAddress) GetType() string {
-	return "COSAddress"
+func (a *COSType) GetStorageType() string {
+	return "COS"
 }
 
-func (a *COSAddress) String() string {
-	return "COSAddress"
+func (a *COSType) String() string {
+	return "COS"
 }
diff --git a/utils/io2/stats.go b/utils/io2/stats.go
new file mode 100644
index 0000000..b6c7956
--- /dev/null
+++ b/utils/io2/stats.go
@@ -0,0 +1,22 @@
+package io2
+
+import "io"
+
+type Counter struct {
+	inner io.Reader
+	count int64
+}
+
+func (c *Counter) Read(buf []byte) (n int, err error) {
+	n, err = c.inner.Read(buf)
+	c.count += int64(n)
+	return
+}
+
+func (c *Counter) Count() int64 {
+	return c.count
+}
+
+func NewCounter(inner io.Reader) *Counter {
+	return &Counter{inner: inner, count: 0}
+}