diff --git a/internal/cmdline/package.go b/internal/cmdline/package.go
index 2db388d..9a54021 100644
--- a/internal/cmdline/package.go
+++ b/internal/cmdline/package.go
@@ -9,6 +9,7 @@ import (
 
 	"github.com/jedib0t/go-pretty/v6/table"
 	"gitlink.org.cn/cloudream/common/models"
+	"gitlink.org.cn/cloudream/storage-client/internal/config"
 	"gitlink.org.cn/cloudream/storage-common/pkgs/iterator"
 )
 
@@ -190,7 +191,7 @@ func PackageUploadECPackage(ctx CommandContext, rootPath string, bucketID int64,
 	}
 
 	objIter := iterator.NewUploadingObjectIterator(rootPath, uploadFilePathes)
-	taskID, err := ctx.Cmdline.Svc.PackageSvc().StartCreatingECPackage(0, bucketID, name, objIter, models.NewECRedundancyInfo(ecName))
+	taskID, err := ctx.Cmdline.Svc.PackageSvc().StartCreatingECPackage(0, bucketID, name, objIter, models.NewECRedundancyInfo(ecName, config.Cfg().ECPacketSize))
 
 	if err != nil {
 		return fmt.Errorf("upload file data failed, err: %w", err)
diff --git a/internal/http/package.go b/internal/http/package.go
index 2980901..f7ddd10 100644
--- a/internal/http/package.go
+++ b/internal/http/package.go
@@ -9,7 +9,6 @@ import (
 	"gitlink.org.cn/cloudream/common/consts/errorcode"
 	"gitlink.org.cn/cloudream/common/models"
 	"gitlink.org.cn/cloudream/common/pkgs/logger"
-	"gitlink.org.cn/cloudream/common/utils/serder"
 	"gitlink.org.cn/cloudream/storage-common/pkgs/iterator"
 )
 
@@ -49,11 +48,12 @@ func (s *PackageService) Upload(ctx *gin.Context) {
 		return
 	}
 
-	switch req.Info.Redundancy.Type {
-	case models.RedundancyRep:
+	if req.Info.Redundancy.IsRepInfo() {
 		s.uploadRep(ctx, &req)
 		return
-	case models.RedundancyEC:
+	}
+
+	if req.Info.Redundancy.IsECInfo() {
 		s.uploadEC(ctx, &req)
 		return
 	}
@@ -64,8 +64,9 @@ func (s *PackageService) Upload(ctx *gin.Context) {
 func (s *PackageService) uploadRep(ctx *gin.Context, req *PackageUploadReq) {
 	log := logger.WithField("HTTP", "Package.Upload")
 
+	var err error
 	var repInfo models.RepRedundancyInfo
-	if err := serder.AnyToAny(req.Info.Redundancy.Info, &repInfo); err != nil {
+	if repInfo, err = req.Info.Redundancy.ToRepInfo(); err != nil {
 		log.Warnf("parsing rep redundancy config: %s", err.Error())
 		ctx.JSON(http.StatusBadRequest, Failed(errorcode.BadArgument, "invalid rep redundancy config"))
 		return
@@ -107,8 +108,9 @@ func (s *PackageService) uploadRep(ctx *gin.Context, req *PackageUploadReq) {
 func (s *PackageService) uploadEC(ctx *gin.Context, req *PackageUploadReq) {
 	log := logger.WithField("HTTP", "Package.Upload")
 
+	var err error
 	var ecInfo models.ECRedundancyInfo
-	if err := serder.AnyToAny(req.Info.Redundancy.Info, &ecInfo); err != nil {
+	if ecInfo, err = req.Info.Redundancy.ToECInfo(); err != nil {
 		log.Warnf("parsing ec redundancy config: %s", err.Error())
 		ctx.JSON(http.StatusBadRequest, Failed(errorcode.BadArgument, "invalid rep redundancy config"))
 		return
diff --git a/internal/services/package.go b/internal/services/package.go
index 89c6678..d1c0d79 100644
--- a/internal/services/package.go
+++ b/internal/services/package.go
@@ -5,8 +5,6 @@ import (
 	"time"
 
 	"gitlink.org.cn/cloudream/common/models"
-	"gitlink.org.cn/cloudream/common/utils/serder"
-	"gitlink.org.cn/cloudream/storage-client/internal/config"
 	mytask "gitlink.org.cn/cloudream/storage-client/internal/task"
 	"gitlink.org.cn/cloudream/storage-common/globals"
 	agtcmd "gitlink.org.cn/cloudream/storage-common/pkgs/cmd"
@@ -61,7 +59,7 @@ func (svc *PackageService) DownloadPackage(userID int64, packageID int64) (itera
 		return nil, fmt.Errorf("getting package objects: %w", err)
 	}
 
-	if getPkgResp.Redundancy.Type == models.RedundancyRep {
+	if getPkgResp.Redundancy.IsRepInfo() {
 		iter, err := svc.downloadRepPackage(packageID, getObjsResp.Objects, coorCli)
 
 		if err != nil {
@@ -108,21 +106,18 @@ func (svc *PackageService) downloadECPackage(pkg model.Package, objects []model.
 		return nil, fmt.Errorf("getting package object ec data: %w", err)
 	}
 
-	var ecRed models.ECRedundancyInfo
-	if err := serder.AnyToAny(pkg.Redundancy.Info, &ecRed); err != nil {
+	var ecInfo models.ECRedundancyInfo
+	if ecInfo, err = pkg.Redundancy.ToECInfo(); err != nil {
 		return nil, fmt.Errorf("get ec redundancy info: %w", err)
 	}
 
-	getECResp, err := coorCli.GetECConfig(coormq.NewGetECConfig(ecRed.ECName))
+	getECResp, err := coorCli.GetECConfig(coormq.NewGetECConfig(ecInfo.ECName))
 	if err != nil {
 		return nil, fmt.Errorf("getting ec: %w", err)
 	}
 
-	iter := iterator.NewECObjectIterator(objects, getObjECDataResp.Data, getECResp.Config, &iterator.ECDownloadContext{
-		DownloadContext: &iterator.DownloadContext{
-			Distlock: svc.DistLock,
-		},
-		ECPacketSize: config.Cfg().ECPacketSize,
+	iter := iterator.NewECObjectIterator(objects, getObjECDataResp.Data, ecInfo, getECResp.Config, &iterator.DownloadContext{
+		Distlock: svc.DistLock,
 	})
 
 	return iter, nil
diff --git a/internal/task/create_ec_package.go b/internal/task/create_ec_package.go
index 005abd4..caa29ca 100644
--- a/internal/task/create_ec_package.go
+++ b/internal/task/create_ec_package.go
@@ -4,7 +4,6 @@ import (
 	"time"
 
 	"gitlink.org.cn/cloudream/common/models"
-	"gitlink.org.cn/cloudream/storage-client/internal/config"
 	"gitlink.org.cn/cloudream/storage-common/pkgs/cmd"
 	"gitlink.org.cn/cloudream/storage-common/pkgs/iterator"
 )
@@ -24,11 +23,8 @@ func NewCreateECPackage(userID int64, bucketID int64, name string, objIter itera
 }
 
 func (t *CreateECPackage) Execute(ctx TaskContext, complete CompleteFn) {
-	ret, err := t.cmd.Execute(&cmd.UpdateECPackageContext{
-		UpdatePackageContext: &cmd.UpdatePackageContext{
-			Distlock: ctx.distlock,
-		},
-		ECPacketSize: config.Cfg().ECPacketSize,
+	ret, err := t.cmd.Execute(&cmd.UpdatePackageContext{
+		Distlock: ctx.distlock,
 	})
 	t.Result = ret
 
diff --git a/internal/task/update_ec_package.go b/internal/task/update_ec_package.go
index 15035db..2750e6e 100644
--- a/internal/task/update_ec_package.go
+++ b/internal/task/update_ec_package.go
@@ -3,7 +3,6 @@ package task
 import (
 	"time"
 
-	"gitlink.org.cn/cloudream/storage-client/internal/config"
 	"gitlink.org.cn/cloudream/storage-common/pkgs/cmd"
 	"gitlink.org.cn/cloudream/storage-common/pkgs/iterator"
 )
@@ -23,11 +22,8 @@ func NewUpdateECPackage(userID int64, packageID int64, objectIter iterator.Uploa
 }
 
 func (t *UpdateECPackage) Execute(ctx TaskContext, complete CompleteFn) {
-	ret, err := t.cmd.Execute(&cmd.UpdateECPackageContext{
-		UpdatePackageContext: &cmd.UpdatePackageContext{
-			Distlock: ctx.distlock,
-		},
-		ECPacketSize: config.Cfg().ECPacketSize,
+	ret, err := t.cmd.Execute(&cmd.UpdatePackageContext{
+		Distlock: ctx.distlock,
 	})
 
 	t.Result = ret