diff --git a/Cargo.lock b/Cargo.lock
index 9d9fba8..11ae5b5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -190,7 +190,7 @@ dependencies = [
 
 [[package]]
 name = "dragonfly-api"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "prost",
  "prost-types",
diff --git a/Cargo.toml b/Cargo.toml
index 671b319..4ead6c6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dragonfly-api"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Gaius <gaius.qi@gmail.com>"]
 edition = "2021"
 license = "Apache-2.0"
diff --git a/build.rs b/build.rs
index 3a218d1..a4598d0 100644
--- a/build.rs
+++ b/build.rs
@@ -10,7 +10,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .extern_path(".google.protobuf.Timestamp", "::prost_wkt_types::Timestamp")
         .extern_path(".google.protobuf.Duration", "::prost_wkt_types::Duration")
         .out_dir("src")
-        .compile(
+        .compile_protos(
             &[
                 "proto/common.proto",
                 "proto/errordetails.proto",
diff --git a/pkg/apis/dfdaemon/v2/dfdaemon.pb.go b/pkg/apis/dfdaemon/v2/dfdaemon.pb.go
index a0e3605..c89faa5 100644
--- a/pkg/apis/dfdaemon/v2/dfdaemon.pb.go
+++ b/pkg/apis/dfdaemon/v2/dfdaemon.pb.go
@@ -738,9 +738,11 @@ type DownloadPersistentCacheTaskRequest struct {
 	// Application of task.
 	Application *string `protobuf:"bytes,4,opt,name=application,proto3,oneof" json:"application,omitempty"`
 	// File path to be exported.
-	OutputPath string `protobuf:"bytes,5,opt,name=output_path,json=outputPath,proto3" json:"output_path,omitempty"`
+	OutputPath *string `protobuf:"bytes,5,opt,name=output_path,json=outputPath,proto3,oneof" json:"output_path,omitempty"`
 	// Download timeout.
 	Timeout *durationpb.Duration `protobuf:"bytes,6,opt,name=timeout,proto3,oneof" json:"timeout,omitempty"`
+	// need_piece_content is the flag to indicate whether the response needs to return piece content.
+	NeedPieceContent bool `protobuf:"varint,7,opt,name=need_piece_content,json=needPieceContent,proto3" json:"need_piece_content,omitempty"`
 }
 
 func (x *DownloadPersistentCacheTaskRequest) Reset() {
@@ -804,8 +806,8 @@ func (x *DownloadPersistentCacheTaskRequest) GetApplication() string {
 }
 
 func (x *DownloadPersistentCacheTaskRequest) GetOutputPath() string {
-	if x != nil {
-		return x.OutputPath
+	if x != nil && x.OutputPath != nil {
+		return *x.OutputPath
 	}
 	return ""
 }
@@ -817,6 +819,13 @@ func (x *DownloadPersistentCacheTaskRequest) GetTimeout() *durationpb.Duration {
 	return nil
 }
 
+func (x *DownloadPersistentCacheTaskRequest) GetNeedPieceContent() bool {
+	if x != nil {
+		return x.NeedPieceContent
+	}
+	return false
+}
+
 // DownloadPersistentCacheTaskStartedResponse represents task download started response of DownloadPersistentCacheTaskResponse.
 type DownloadPersistentCacheTaskStartedResponse struct {
 	state         protoimpl.MessageState
@@ -1334,7 +1343,7 @@ var file_pkg_apis_dfdaemon_v2_dfdaemon_proto_rawDesc = []byte{
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@@ -1345,91 +1354,150 @@ var file_pkg_apis_dfdaemon_v2_dfdaemon_proto_rawDesc = []byte{
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+	0x70, 0x74, 0x79, 0x12, 0x82, 0x01, 0x0a, 0x1b, 0x44, 0x6f, 0x77, 0x6e, 0x6c, 0x6f, 0x61, 0x64,
 	0x50, 0x65, 0x72, 0x73, 0x69, 0x73, 0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65, 0x54,
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+	0x73, 0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65, 0x54, 0x61, 0x73, 0x6b, 0x52, 0x65,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x30, 0x01, 0x12, 0x6a, 0x0a, 0x19, 0x55, 0x70, 0x6c, 0x6f,
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+	0x65, 0x54, 0x61, 0x73, 0x6b, 0x12, 0x2d, 0x2e, 0x64, 0x66, 0x64, 0x61, 0x65, 0x6d, 0x6f, 0x6e,
+	0x2e, 0x76, 0x32, 0x2e, 0x55, 0x70, 0x6c, 0x6f, 0x61, 0x64, 0x50, 0x65, 0x72, 0x73, 0x69, 0x73,
+	0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65, 0x54, 0x61, 0x73, 0x6b, 0x52, 0x65, 0x71,
+	0x75, 0x65, 0x73, 0x74, 0x1a, 0x1e, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x76, 0x32,
+	0x2e, 0x50, 0x65, 0x72, 0x73, 0x69, 0x73, 0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65,
+	0x54, 0x61, 0x73, 0x6b, 0x12, 0x66, 0x0a, 0x17, 0x53, 0x74, 0x61, 0x74, 0x50, 0x65, 0x72, 0x73,
+	0x69, 0x73, 0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65, 0x54, 0x61, 0x73, 0x6b, 0x12,
+	0x2b, 0x2e, 0x64, 0x66, 0x64, 0x61, 0x65, 0x6d, 0x6f, 0x6e, 0x2e, 0x76, 0x32, 0x2e, 0x53, 0x74,
+	0x61, 0x74, 0x50, 0x65, 0x72, 0x73, 0x69, 0x73, 0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68,
+	0x65, 0x54, 0x61, 0x73, 0x6b, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1e, 0x2e, 0x63,
+	0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x76, 0x32, 0x2e, 0x50, 0x65, 0x72, 0x73, 0x69, 0x73, 0x74,
+	0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65, 0x54, 0x61, 0x73, 0x6b, 0x12, 0x62, 0x0a, 0x19,
+	0x44, 0x65, 0x6c, 0x65, 0x74, 0x65, 0x50, 0x65, 0x72, 0x73, 0x69, 0x73, 0x74, 0x65, 0x6e, 0x74,
+	0x43, 0x61, 0x63, 0x68, 0x65, 0x54, 0x61, 0x73, 0x6b, 0x12, 0x2d, 0x2e, 0x64, 0x66, 0x64, 0x61,
+	0x65, 0x6d, 0x6f, 0x6e, 0x2e, 0x76, 0x32, 0x2e, 0x44, 0x65, 0x6c, 0x65, 0x74, 0x65, 0x50, 0x65,
+	0x72, 0x73, 0x69, 0x73, 0x74, 0x65, 0x6e, 0x74, 0x43, 0x61, 0x63, 0x68, 0x65, 0x54, 0x61, 0x73,
+	0x6b, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x16, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
+	0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6d, 0x70, 0x74, 0x79,
+	0x42, 0x2d, 0x5a, 0x2b, 0x64, 0x37, 0x79, 0x2e, 0x69, 0x6f, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x76,
+	0x32, 0x2f, 0x70, 0x6b, 0x67, 0x2f, 0x61, 0x70, 0x69, 0x73, 0x2f, 0x64, 0x66, 0x64, 0x61, 0x65,
+	0x6d, 0x6f, 0x6e, 0x2f, 0x76, 0x32, 0x3b, 0x64, 0x66, 0x64, 0x61, 0x65, 0x6d, 0x6f, 0x6e, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/pkg/apis/dfdaemon/v2/dfdaemon.pb.validate.go b/pkg/apis/dfdaemon/v2/dfdaemon.pb.validate.go
index ed5be51..149d139 100644
--- a/pkg/apis/dfdaemon/v2/dfdaemon.pb.validate.go
+++ b/pkg/apis/dfdaemon/v2/dfdaemon.pb.validate.go
@@ -1642,16 +1642,7 @@ func (m *DownloadPersistentCacheTaskRequest) validate(all bool) error {
 
 	// no validation rules for Persistent
 
-	if utf8.RuneCountInString(m.GetOutputPath()) < 1 {
-		err := DownloadPersistentCacheTaskRequestValidationError{
-			field:  "OutputPath",
-			reason: "value length must be at least 1 runes",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
+	// no validation rules for NeedPieceContent
 
 	if m.Tag != nil {
 		// no validation rules for Tag
@@ -1661,6 +1652,25 @@ func (m *DownloadPersistentCacheTaskRequest) validate(all bool) error {
 		// no validation rules for Application
 	}
 
+	if m.OutputPath != nil {
+
+		if m.GetOutputPath() != "" {
+
+			if utf8.RuneCountInString(m.GetOutputPath()) < 1 {
+				err := DownloadPersistentCacheTaskRequestValidationError{
+					field:  "OutputPath",
+					reason: "value length must be at least 1 runes",
+				}
+				if !all {
+					return err
+				}
+				errors = append(errors, err)
+			}
+
+		}
+
+	}
+
 	if m.Timeout != nil {
 
 		if all {
diff --git a/pkg/apis/dfdaemon/v2/dfdaemon.proto b/pkg/apis/dfdaemon/v2/dfdaemon.proto
index 831c7dc..cab2082 100644
--- a/pkg/apis/dfdaemon/v2/dfdaemon.proto
+++ b/pkg/apis/dfdaemon/v2/dfdaemon.proto
@@ -138,9 +138,11 @@ message DownloadPersistentCacheTaskRequest {
   // Application of task.
   optional string application = 4;
   // File path to be exported.
-  string output_path = 5 [(validate.rules).string.min_len = 1];
+  optional string output_path = 5 [(validate.rules).string = {min_len: 1, ignore_empty: true}];
   // Download timeout.
   optional google.protobuf.Duration timeout = 6;
+  // need_piece_content is the flag to indicate whether the response needs to return piece content.
+  bool need_piece_content = 7;
 }
 
 // DownloadPersistentCacheTaskStartedResponse represents task download started response of DownloadPersistentCacheTaskResponse.
diff --git a/pkg/apis/dfdaemon/v2/mocks/dfdaemon_mock.go b/pkg/apis/dfdaemon/v2/mocks/dfdaemon_mock.go
index f0bf651..cbcaabb 100644
--- a/pkg/apis/dfdaemon/v2/mocks/dfdaemon_mock.go
+++ b/pkg/apis/dfdaemon/v2/mocks/dfdaemon_mock.go
@@ -185,6 +185,26 @@ func (mr *MockDfdaemonUploadClientMockRecorder) StatTask(ctx, in any, opts ...an
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "StatTask", reflect.TypeOf((*MockDfdaemonUploadClient)(nil).StatTask), varargs...)
 }
 
+// SyncHost mocks base method.
+func (m *MockDfdaemonUploadClient) SyncHost(ctx context.Context, in *dfdaemon.SyncHostRequest, opts ...grpc.CallOption) (dfdaemon.DfdaemonUpload_SyncHostClient, error) {
+	m.ctrl.T.Helper()
+	varargs := []any{ctx, in}
+	for _, a := range opts {
+		varargs = append(varargs, a)
+	}
+	ret := m.ctrl.Call(m, "SyncHost", varargs...)
+	ret0, _ := ret[0].(dfdaemon.DfdaemonUpload_SyncHostClient)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// SyncHost indicates an expected call of SyncHost.
+func (mr *MockDfdaemonUploadClientMockRecorder) SyncHost(ctx, in any, opts ...any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	varargs := append([]any{ctx, in}, opts...)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SyncHost", reflect.TypeOf((*MockDfdaemonUploadClient)(nil).SyncHost), varargs...)
+}
+
 // SyncPieces mocks base method.
 func (m *MockDfdaemonUploadClient) SyncPieces(ctx context.Context, in *dfdaemon.SyncPiecesRequest, opts ...grpc.CallOption) (dfdaemon.DfdaemonUpload_SyncPiecesClient, error) {
 	m.ctrl.T.Helper()
@@ -577,6 +597,130 @@ func (mr *MockDfdaemonUpload_DownloadPersistentCacheTaskClientMockRecorder) Trai
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Trailer", reflect.TypeOf((*MockDfdaemonUpload_DownloadPersistentCacheTaskClient)(nil).Trailer))
 }
 
+// MockDfdaemonUpload_SyncHostClient is a mock of DfdaemonUpload_SyncHostClient interface.
+type MockDfdaemonUpload_SyncHostClient struct {
+	ctrl     *gomock.Controller
+	recorder *MockDfdaemonUpload_SyncHostClientMockRecorder
+	isgomock struct{}
+}
+
+// MockDfdaemonUpload_SyncHostClientMockRecorder is the mock recorder for MockDfdaemonUpload_SyncHostClient.
+type MockDfdaemonUpload_SyncHostClientMockRecorder struct {
+	mock *MockDfdaemonUpload_SyncHostClient
+}
+
+// NewMockDfdaemonUpload_SyncHostClient creates a new mock instance.
+func NewMockDfdaemonUpload_SyncHostClient(ctrl *gomock.Controller) *MockDfdaemonUpload_SyncHostClient {
+	mock := &MockDfdaemonUpload_SyncHostClient{ctrl: ctrl}
+	mock.recorder = &MockDfdaemonUpload_SyncHostClientMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockDfdaemonUpload_SyncHostClient) EXPECT() *MockDfdaemonUpload_SyncHostClientMockRecorder {
+	return m.recorder
+}
+
+// CloseSend mocks base method.
+func (m *MockDfdaemonUpload_SyncHostClient) CloseSend() error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CloseSend")
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// CloseSend indicates an expected call of CloseSend.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) CloseSend() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CloseSend", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).CloseSend))
+}
+
+// Context mocks base method.
+func (m *MockDfdaemonUpload_SyncHostClient) Context() context.Context {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Context")
+	ret0, _ := ret[0].(context.Context)
+	return ret0
+}
+
+// Context indicates an expected call of Context.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) Context() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Context", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).Context))
+}
+
+// Header mocks base method.
+func (m *MockDfdaemonUpload_SyncHostClient) Header() (metadata.MD, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Header")
+	ret0, _ := ret[0].(metadata.MD)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Header indicates an expected call of Header.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) Header() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Header", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).Header))
+}
+
+// Recv mocks base method.
+func (m *MockDfdaemonUpload_SyncHostClient) Recv() (*common.Host, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Recv")
+	ret0, _ := ret[0].(*common.Host)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Recv indicates an expected call of Recv.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) Recv() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Recv", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).Recv))
+}
+
+// RecvMsg mocks base method.
+func (m_2 *MockDfdaemonUpload_SyncHostClient) RecvMsg(m any) error {
+	m_2.ctrl.T.Helper()
+	ret := m_2.ctrl.Call(m_2, "RecvMsg", m)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// RecvMsg indicates an expected call of RecvMsg.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) RecvMsg(m any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "RecvMsg", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).RecvMsg), m)
+}
+
+// SendMsg mocks base method.
+func (m_2 *MockDfdaemonUpload_SyncHostClient) SendMsg(m any) error {
+	m_2.ctrl.T.Helper()
+	ret := m_2.ctrl.Call(m_2, "SendMsg", m)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// SendMsg indicates an expected call of SendMsg.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) SendMsg(m any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SendMsg", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).SendMsg), m)
+}
+
+// Trailer mocks base method.
+func (m *MockDfdaemonUpload_SyncHostClient) Trailer() metadata.MD {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Trailer")
+	ret0, _ := ret[0].(metadata.MD)
+	return ret0
+}
+
+// Trailer indicates an expected call of Trailer.
+func (mr *MockDfdaemonUpload_SyncHostClientMockRecorder) Trailer() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Trailer", reflect.TypeOf((*MockDfdaemonUpload_SyncHostClient)(nil).Trailer))
+}
+
 // MockDfdaemonUploadServer is a mock of DfdaemonUploadServer interface.
 type MockDfdaemonUploadServer struct {
 	ctrl     *gomock.Controller
@@ -704,6 +848,20 @@ func (mr *MockDfdaemonUploadServerMockRecorder) StatTask(arg0, arg1 any) *gomock
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "StatTask", reflect.TypeOf((*MockDfdaemonUploadServer)(nil).StatTask), arg0, arg1)
 }
 
+// SyncHost mocks base method.
+func (m *MockDfdaemonUploadServer) SyncHost(arg0 *dfdaemon.SyncHostRequest, arg1 dfdaemon.DfdaemonUpload_SyncHostServer) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "SyncHost", arg0, arg1)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// SyncHost indicates an expected call of SyncHost.
+func (mr *MockDfdaemonUploadServerMockRecorder) SyncHost(arg0, arg1 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SyncHost", reflect.TypeOf((*MockDfdaemonUploadServer)(nil).SyncHost), arg0, arg1)
+}
+
 // SyncPieces mocks base method.
 func (m *MockDfdaemonUploadServer) SyncPieces(arg0 *dfdaemon.SyncPiecesRequest, arg1 dfdaemon.DfdaemonUpload_SyncPiecesServer) error {
 	m.ctrl.T.Helper()
@@ -1114,6 +1272,126 @@ func (mr *MockDfdaemonUpload_DownloadPersistentCacheTaskServerMockRecorder) SetT
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetTrailer", reflect.TypeOf((*MockDfdaemonUpload_DownloadPersistentCacheTaskServer)(nil).SetTrailer), arg0)
 }
 
+// MockDfdaemonUpload_SyncHostServer is a mock of DfdaemonUpload_SyncHostServer interface.
+type MockDfdaemonUpload_SyncHostServer struct {
+	ctrl     *gomock.Controller
+	recorder *MockDfdaemonUpload_SyncHostServerMockRecorder
+	isgomock struct{}
+}
+
+// MockDfdaemonUpload_SyncHostServerMockRecorder is the mock recorder for MockDfdaemonUpload_SyncHostServer.
+type MockDfdaemonUpload_SyncHostServerMockRecorder struct {
+	mock *MockDfdaemonUpload_SyncHostServer
+}
+
+// NewMockDfdaemonUpload_SyncHostServer creates a new mock instance.
+func NewMockDfdaemonUpload_SyncHostServer(ctrl *gomock.Controller) *MockDfdaemonUpload_SyncHostServer {
+	mock := &MockDfdaemonUpload_SyncHostServer{ctrl: ctrl}
+	mock.recorder = &MockDfdaemonUpload_SyncHostServerMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockDfdaemonUpload_SyncHostServer) EXPECT() *MockDfdaemonUpload_SyncHostServerMockRecorder {
+	return m.recorder
+}
+
+// Context mocks base method.
+func (m *MockDfdaemonUpload_SyncHostServer) Context() context.Context {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Context")
+	ret0, _ := ret[0].(context.Context)
+	return ret0
+}
+
+// Context indicates an expected call of Context.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) Context() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Context", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).Context))
+}
+
+// RecvMsg mocks base method.
+func (m_2 *MockDfdaemonUpload_SyncHostServer) RecvMsg(m any) error {
+	m_2.ctrl.T.Helper()
+	ret := m_2.ctrl.Call(m_2, "RecvMsg", m)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// RecvMsg indicates an expected call of RecvMsg.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) RecvMsg(m any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "RecvMsg", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).RecvMsg), m)
+}
+
+// Send mocks base method.
+func (m *MockDfdaemonUpload_SyncHostServer) Send(arg0 *common.Host) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Send", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Send indicates an expected call of Send.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) Send(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Send", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).Send), arg0)
+}
+
+// SendHeader mocks base method.
+func (m *MockDfdaemonUpload_SyncHostServer) SendHeader(arg0 metadata.MD) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "SendHeader", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// SendHeader indicates an expected call of SendHeader.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) SendHeader(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SendHeader", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).SendHeader), arg0)
+}
+
+// SendMsg mocks base method.
+func (m_2 *MockDfdaemonUpload_SyncHostServer) SendMsg(m any) error {
+	m_2.ctrl.T.Helper()
+	ret := m_2.ctrl.Call(m_2, "SendMsg", m)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// SendMsg indicates an expected call of SendMsg.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) SendMsg(m any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SendMsg", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).SendMsg), m)
+}
+
+// SetHeader mocks base method.
+func (m *MockDfdaemonUpload_SyncHostServer) SetHeader(arg0 metadata.MD) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "SetHeader", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// SetHeader indicates an expected call of SetHeader.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) SetHeader(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetHeader", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).SetHeader), arg0)
+}
+
+// SetTrailer mocks base method.
+func (m *MockDfdaemonUpload_SyncHostServer) SetTrailer(arg0 metadata.MD) {
+	m.ctrl.T.Helper()
+	m.ctrl.Call(m, "SetTrailer", arg0)
+}
+
+// SetTrailer indicates an expected call of SetTrailer.
+func (mr *MockDfdaemonUpload_SyncHostServerMockRecorder) SetTrailer(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetTrailer", reflect.TypeOf((*MockDfdaemonUpload_SyncHostServer)(nil).SetTrailer), arg0)
+}
+
 // MockDfdaemonDownloadClient is a mock of DfdaemonDownloadClient interface.
 type MockDfdaemonDownloadClient struct {
 	ctrl     *gomock.Controller
diff --git a/proto/dfdaemon.proto b/proto/dfdaemon.proto
index 89bf0e8..64f28e2 100644
--- a/proto/dfdaemon.proto
+++ b/proto/dfdaemon.proto
@@ -127,9 +127,11 @@ message DownloadPersistentCacheTaskRequest {
   // Application of task.
   optional string application = 4;
   // File path to be exported.
-  string output_path = 5;
+  optional string output_path = 5;
   // Download timeout.
   optional google.protobuf.Duration timeout = 6;
+  // need_piece_content is the flag to indicate whether the response needs to return piece content.
+  bool need_piece_content = 7;
 }
 
 // DownloadPersistentCacheTaskStartedResponse represents task download started response of DownloadPersistentCacheTaskResponse.
diff --git a/src/descriptor.bin b/src/descriptor.bin
index 4a8b933..4bd2ff8 100644
Binary files a/src/descriptor.bin and b/src/descriptor.bin differ
diff --git a/src/dfdaemon.v2.rs b/src/dfdaemon.v2.rs
index 9509440..f3051a6 100644
--- a/src/dfdaemon.v2.rs
+++ b/src/dfdaemon.v2.rs
@@ -161,11 +161,14 @@ pub struct DownloadPersistentCacheTaskRequest {
     #[prost(string, optional, tag = "4")]
     pub application: ::core::option::Option<::prost::alloc::string::String>,
     /// File path to be exported.
-    #[prost(string, tag = "5")]
-    pub output_path: ::prost::alloc::string::String,
+    #[prost(string, optional, tag = "5")]
+    pub output_path: ::core::option::Option<::prost::alloc::string::String>,
     /// Download timeout.
     #[prost(message, optional, tag = "6")]
     pub timeout: ::core::option::Option<::prost_wkt_types::Duration>,
+    /// need_piece_content is the flag to indicate whether the response needs to return piece content.
+    #[prost(bool, tag = "7")]
+    pub need_piece_content: bool,
 }
 /// DownloadPersistentCacheTaskStartedResponse represents task download started response of DownloadPersistentCacheTaskResponse.
 #[derive(serde::Serialize, serde::Deserialize)]