diff --git a/pkg/pdpb/pdpb.pb.go b/pkg/pdpb/pdpb.pb.go
index 40d728943..ed107668c 100644
--- a/pkg/pdpb/pdpb.pb.go
+++ b/pkg/pdpb/pdpb.pb.go
@@ -67,7 +67,7 @@ func (x ErrorType) String() string {
 	return proto.EnumName(ErrorType_name, int32(x))
 }
 func (ErrorType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{0}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{0}
 }
 
 type CheckPolicy int32
@@ -90,7 +90,7 @@ func (x CheckPolicy) String() string {
 	return proto.EnumName(CheckPolicy_name, int32(x))
 }
 func (CheckPolicy) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{1}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{1}
 }
 
 type OperatorStatus int32
@@ -122,7 +122,7 @@ func (x OperatorStatus) String() string {
 	return proto.EnumName(OperatorStatus_name, int32(x))
 }
 func (OperatorStatus) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{2}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{2}
 }
 
 type RequestHeader struct {
@@ -137,7 +137,7 @@ func (m *RequestHeader) Reset()         { *m = RequestHeader{} }
 func (m *RequestHeader) String() string { return proto.CompactTextString(m) }
 func (*RequestHeader) ProtoMessage()    {}
 func (*RequestHeader) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{0}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{0}
 }
 func (m *RequestHeader) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -186,7 +186,7 @@ func (m *ResponseHeader) Reset()         { *m = ResponseHeader{} }
 func (m *ResponseHeader) String() string { return proto.CompactTextString(m) }
 func (*ResponseHeader) ProtoMessage()    {}
 func (*ResponseHeader) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{1}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{1}
 }
 func (m *ResponseHeader) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -241,7 +241,7 @@ func (m *Error) Reset()         { *m = Error{} }
 func (m *Error) String() string { return proto.CompactTextString(m) }
 func (*Error) ProtoMessage()    {}
 func (*Error) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{2}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{2}
 }
 func (m *Error) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -296,7 +296,7 @@ func (m *TsoRequest) Reset()         { *m = TsoRequest{} }
 func (m *TsoRequest) String() string { return proto.CompactTextString(m) }
 func (*TsoRequest) ProtoMessage()    {}
 func (*TsoRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{3}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{3}
 }
 func (m *TsoRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -351,7 +351,7 @@ func (m *Timestamp) Reset()         { *m = Timestamp{} }
 func (m *Timestamp) String() string { return proto.CompactTextString(m) }
 func (*Timestamp) ProtoMessage()    {}
 func (*Timestamp) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{4}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{4}
 }
 func (m *Timestamp) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -407,7 +407,7 @@ func (m *TsoResponse) Reset()         { *m = TsoResponse{} }
 func (m *TsoResponse) String() string { return proto.CompactTextString(m) }
 func (*TsoResponse) ProtoMessage()    {}
 func (*TsoResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{5}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{5}
 }
 func (m *TsoResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -470,7 +470,7 @@ func (m *BootstrapRequest) Reset()         { *m = BootstrapRequest{} }
 func (m *BootstrapRequest) String() string { return proto.CompactTextString(m) }
 func (*BootstrapRequest) ProtoMessage()    {}
 func (*BootstrapRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{6}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{6}
 }
 func (m *BootstrapRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -531,7 +531,7 @@ func (m *BootstrapResponse) Reset()         { *m = BootstrapResponse{} }
 func (m *BootstrapResponse) String() string { return proto.CompactTextString(m) }
 func (*BootstrapResponse) ProtoMessage()    {}
 func (*BootstrapResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{7}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{7}
 }
 func (m *BootstrapResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -578,7 +578,7 @@ func (m *IsBootstrappedRequest) Reset()         { *m = IsBootstrappedRequest{} }
 func (m *IsBootstrappedRequest) String() string { return proto.CompactTextString(m) }
 func (*IsBootstrappedRequest) ProtoMessage()    {}
 func (*IsBootstrappedRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{8}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{8}
 }
 func (m *IsBootstrappedRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -626,7 +626,7 @@ func (m *IsBootstrappedResponse) Reset()         { *m = IsBootstrappedResponse{}
 func (m *IsBootstrappedResponse) String() string { return proto.CompactTextString(m) }
 func (*IsBootstrappedResponse) ProtoMessage()    {}
 func (*IsBootstrappedResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{9}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{9}
 }
 func (m *IsBootstrappedResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -680,7 +680,7 @@ func (m *AllocIDRequest) Reset()         { *m = AllocIDRequest{} }
 func (m *AllocIDRequest) String() string { return proto.CompactTextString(m) }
 func (*AllocIDRequest) ProtoMessage()    {}
 func (*AllocIDRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{10}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{10}
 }
 func (m *AllocIDRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -728,7 +728,7 @@ func (m *AllocIDResponse) Reset()         { *m = AllocIDResponse{} }
 func (m *AllocIDResponse) String() string { return proto.CompactTextString(m) }
 func (*AllocIDResponse) ProtoMessage()    {}
 func (*AllocIDResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{11}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{11}
 }
 func (m *AllocIDResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -783,7 +783,7 @@ func (m *GetStoreRequest) Reset()         { *m = GetStoreRequest{} }
 func (m *GetStoreRequest) String() string { return proto.CompactTextString(m) }
 func (*GetStoreRequest) ProtoMessage()    {}
 func (*GetStoreRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{12}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{12}
 }
 func (m *GetStoreRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -839,7 +839,7 @@ func (m *GetStoreResponse) Reset()         { *m = GetStoreResponse{} }
 func (m *GetStoreResponse) String() string { return proto.CompactTextString(m) }
 func (*GetStoreResponse) ProtoMessage()    {}
 func (*GetStoreResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{13}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{13}
 }
 func (m *GetStoreResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -901,7 +901,7 @@ func (m *PutStoreRequest) Reset()         { *m = PutStoreRequest{} }
 func (m *PutStoreRequest) String() string { return proto.CompactTextString(m) }
 func (*PutStoreRequest) ProtoMessage()    {}
 func (*PutStoreRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{14}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{14}
 }
 func (m *PutStoreRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -955,7 +955,7 @@ func (m *PutStoreResponse) Reset()         { *m = PutStoreResponse{} }
 func (m *PutStoreResponse) String() string { return proto.CompactTextString(m) }
 func (*PutStoreResponse) ProtoMessage()    {}
 func (*PutStoreResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{15}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{15}
 }
 func (m *PutStoreResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1004,7 +1004,7 @@ func (m *GetAllStoresRequest) Reset()         { *m = GetAllStoresRequest{} }
 func (m *GetAllStoresRequest) String() string { return proto.CompactTextString(m) }
 func (*GetAllStoresRequest) ProtoMessage()    {}
 func (*GetAllStoresRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{16}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{16}
 }
 func (m *GetAllStoresRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1059,7 +1059,7 @@ func (m *GetAllStoresResponse) Reset()         { *m = GetAllStoresResponse{} }
 func (m *GetAllStoresResponse) String() string { return proto.CompactTextString(m) }
 func (*GetAllStoresResponse) ProtoMessage()    {}
 func (*GetAllStoresResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{17}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{17}
 }
 func (m *GetAllStoresResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1114,7 +1114,7 @@ func (m *GetRegionRequest) Reset()         { *m = GetRegionRequest{} }
 func (m *GetRegionRequest) String() string { return proto.CompactTextString(m) }
 func (*GetRegionRequest) ProtoMessage()    {}
 func (*GetRegionRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{18}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{18}
 }
 func (m *GetRegionRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1171,7 +1171,7 @@ func (m *GetRegionResponse) Reset()         { *m = GetRegionResponse{} }
 func (m *GetRegionResponse) String() string { return proto.CompactTextString(m) }
 func (*GetRegionResponse) ProtoMessage()    {}
 func (*GetRegionResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{19}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{19}
 }
 func (m *GetRegionResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1240,7 +1240,7 @@ func (m *GetRegionByIDRequest) Reset()         { *m = GetRegionByIDRequest{} }
 func (m *GetRegionByIDRequest) String() string { return proto.CompactTextString(m) }
 func (*GetRegionByIDRequest) ProtoMessage()    {}
 func (*GetRegionByIDRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{20}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{20}
 }
 func (m *GetRegionByIDRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1283,6 +1283,132 @@ func (m *GetRegionByIDRequest) GetRegionId() uint64 {
 	return 0
 }
 
+type ScanRegionsRequest struct {
+	Header               *RequestHeader `protobuf:"bytes,1,opt,name=header" json:"header,omitempty"`
+	StartKey             []byte         `protobuf:"bytes,2,opt,name=start_key,json=startKey,proto3" json:"start_key,omitempty"`
+	Limit                int32          `protobuf:"varint,3,opt,name=limit,proto3" json:"limit,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
+	XXX_unrecognized     []byte         `json:"-"`
+	XXX_sizecache        int32          `json:"-"`
+}
+
+func (m *ScanRegionsRequest) Reset()         { *m = ScanRegionsRequest{} }
+func (m *ScanRegionsRequest) String() string { return proto.CompactTextString(m) }
+func (*ScanRegionsRequest) ProtoMessage()    {}
+func (*ScanRegionsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{21}
+}
+func (m *ScanRegionsRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *ScanRegionsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_ScanRegionsRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalTo(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (dst *ScanRegionsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ScanRegionsRequest.Merge(dst, src)
+}
+func (m *ScanRegionsRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *ScanRegionsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ScanRegionsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ScanRegionsRequest proto.InternalMessageInfo
+
+func (m *ScanRegionsRequest) GetHeader() *RequestHeader {
+	if m != nil {
+		return m.Header
+	}
+	return nil
+}
+
+func (m *ScanRegionsRequest) GetStartKey() []byte {
+	if m != nil {
+		return m.StartKey
+	}
+	return nil
+}
+
+func (m *ScanRegionsRequest) GetLimit() int32 {
+	if m != nil {
+		return m.Limit
+	}
+	return 0
+}
+
+type ScanRegionsResponse struct {
+	Header               *ResponseHeader  `protobuf:"bytes,1,opt,name=header" json:"header,omitempty"`
+	Regions              []*metapb.Region `protobuf:"bytes,2,rep,name=regions" json:"regions,omitempty"`
+	Leaders              []*metapb.Peer   `protobuf:"bytes,3,rep,name=leaders" json:"leaders,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *ScanRegionsResponse) Reset()         { *m = ScanRegionsResponse{} }
+func (m *ScanRegionsResponse) String() string { return proto.CompactTextString(m) }
+func (*ScanRegionsResponse) ProtoMessage()    {}
+func (*ScanRegionsResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{22}
+}
+func (m *ScanRegionsResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *ScanRegionsResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_ScanRegionsResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalTo(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (dst *ScanRegionsResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ScanRegionsResponse.Merge(dst, src)
+}
+func (m *ScanRegionsResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *ScanRegionsResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ScanRegionsResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ScanRegionsResponse proto.InternalMessageInfo
+
+func (m *ScanRegionsResponse) GetHeader() *ResponseHeader {
+	if m != nil {
+		return m.Header
+	}
+	return nil
+}
+
+func (m *ScanRegionsResponse) GetRegions() []*metapb.Region {
+	if m != nil {
+		return m.Regions
+	}
+	return nil
+}
+
+func (m *ScanRegionsResponse) GetLeaders() []*metapb.Peer {
+	if m != nil {
+		return m.Leaders
+	}
+	return nil
+}
+
 type GetClusterConfigRequest struct {
 	Header               *RequestHeader `protobuf:"bytes,1,opt,name=header" json:"header,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
@@ -1294,7 +1420,7 @@ func (m *GetClusterConfigRequest) Reset()         { *m = GetClusterConfigRequest
 func (m *GetClusterConfigRequest) String() string { return proto.CompactTextString(m) }
 func (*GetClusterConfigRequest) ProtoMessage()    {}
 func (*GetClusterConfigRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{21}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{23}
 }
 func (m *GetClusterConfigRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1342,7 +1468,7 @@ func (m *GetClusterConfigResponse) Reset()         { *m = GetClusterConfigRespon
 func (m *GetClusterConfigResponse) String() string { return proto.CompactTextString(m) }
 func (*GetClusterConfigResponse) ProtoMessage()    {}
 func (*GetClusterConfigResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{22}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{24}
 }
 func (m *GetClusterConfigResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1397,7 +1523,7 @@ func (m *PutClusterConfigRequest) Reset()         { *m = PutClusterConfigRequest
 func (m *PutClusterConfigRequest) String() string { return proto.CompactTextString(m) }
 func (*PutClusterConfigRequest) ProtoMessage()    {}
 func (*PutClusterConfigRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{23}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{25}
 }
 func (m *PutClusterConfigRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1451,7 +1577,7 @@ func (m *PutClusterConfigResponse) Reset()         { *m = PutClusterConfigRespon
 func (m *PutClusterConfigResponse) String() string { return proto.CompactTextString(m) }
 func (*PutClusterConfigResponse) ProtoMessage()    {}
 func (*PutClusterConfigResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{24}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{26}
 }
 func (m *PutClusterConfigResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1504,7 +1630,7 @@ func (m *Member) Reset()         { *m = Member{} }
 func (m *Member) String() string { return proto.CompactTextString(m) }
 func (*Member) ProtoMessage()    {}
 func (*Member) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{25}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{27}
 }
 func (m *Member) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1579,7 +1705,7 @@ func (m *GetMembersRequest) Reset()         { *m = GetMembersRequest{} }
 func (m *GetMembersRequest) String() string { return proto.CompactTextString(m) }
 func (*GetMembersRequest) ProtoMessage()    {}
 func (*GetMembersRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{26}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{28}
 }
 func (m *GetMembersRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1629,7 +1755,7 @@ func (m *GetMembersResponse) Reset()         { *m = GetMembersResponse{} }
 func (m *GetMembersResponse) String() string { return proto.CompactTextString(m) }
 func (*GetMembersResponse) ProtoMessage()    {}
 func (*GetMembersResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{27}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{29}
 }
 func (m *GetMembersResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1698,7 +1824,7 @@ func (m *PeerStats) Reset()         { *m = PeerStats{} }
 func (m *PeerStats) String() string { return proto.CompactTextString(m) }
 func (*PeerStats) ProtoMessage()    {}
 func (*PeerStats) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{28}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{30}
 }
 func (m *PeerStats) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1772,7 +1898,7 @@ func (m *RegionHeartbeatRequest) Reset()         { *m = RegionHeartbeatRequest{}
 func (m *RegionHeartbeatRequest) String() string { return proto.CompactTextString(m) }
 func (*RegionHeartbeatRequest) ProtoMessage()    {}
 func (*RegionHeartbeatRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{29}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{31}
 }
 func (m *RegionHeartbeatRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1897,7 +2023,7 @@ func (m *ChangePeer) Reset()         { *m = ChangePeer{} }
 func (m *ChangePeer) String() string { return proto.CompactTextString(m) }
 func (*ChangePeer) ProtoMessage()    {}
 func (*ChangePeer) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{30}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{32}
 }
 func (m *ChangePeer) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1951,7 +2077,7 @@ func (m *TransferLeader) Reset()         { *m = TransferLeader{} }
 func (m *TransferLeader) String() string { return proto.CompactTextString(m) }
 func (*TransferLeader) ProtoMessage()    {}
 func (*TransferLeader) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{31}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{33}
 }
 func (m *TransferLeader) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1998,7 +2124,7 @@ func (m *Merge) Reset()         { *m = Merge{} }
 func (m *Merge) String() string { return proto.CompactTextString(m) }
 func (*Merge) ProtoMessage()    {}
 func (*Merge) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{32}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{34}
 }
 func (m *Merge) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2045,7 +2171,7 @@ func (m *SplitRegion) Reset()         { *m = SplitRegion{} }
 func (m *SplitRegion) String() string { return proto.CompactTextString(m) }
 func (*SplitRegion) ProtoMessage()    {}
 func (*SplitRegion) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{33}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{35}
 }
 func (m *SplitRegion) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2117,7 +2243,7 @@ func (m *RegionHeartbeatResponse) Reset()         { *m = RegionHeartbeatResponse
 func (m *RegionHeartbeatResponse) String() string { return proto.CompactTextString(m) }
 func (*RegionHeartbeatResponse) ProtoMessage()    {}
 func (*RegionHeartbeatResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{34}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{36}
 }
 func (m *RegionHeartbeatResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2214,7 +2340,7 @@ func (m *AskSplitRequest) Reset()         { *m = AskSplitRequest{} }
 func (m *AskSplitRequest) String() string { return proto.CompactTextString(m) }
 func (*AskSplitRequest) ProtoMessage()    {}
 func (*AskSplitRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{35}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{37}
 }
 func (m *AskSplitRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2274,7 +2400,7 @@ func (m *AskSplitResponse) Reset()         { *m = AskSplitResponse{} }
 func (m *AskSplitResponse) String() string { return proto.CompactTextString(m) }
 func (*AskSplitResponse) ProtoMessage()    {}
 func (*AskSplitResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{36}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{38}
 }
 func (m *AskSplitResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2337,7 +2463,7 @@ func (m *ReportSplitRequest) Reset()         { *m = ReportSplitRequest{} }
 func (m *ReportSplitRequest) String() string { return proto.CompactTextString(m) }
 func (*ReportSplitRequest) ProtoMessage()    {}
 func (*ReportSplitRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{37}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{39}
 }
 func (m *ReportSplitRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2398,7 +2524,7 @@ func (m *ReportSplitResponse) Reset()         { *m = ReportSplitResponse{} }
 func (m *ReportSplitResponse) String() string { return proto.CompactTextString(m) }
 func (*ReportSplitResponse) ProtoMessage()    {}
 func (*ReportSplitResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{38}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{40}
 }
 func (m *ReportSplitResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2447,7 +2573,7 @@ func (m *AskBatchSplitRequest) Reset()         { *m = AskBatchSplitRequest{} }
 func (m *AskBatchSplitRequest) String() string { return proto.CompactTextString(m) }
 func (*AskBatchSplitRequest) ProtoMessage()    {}
 func (*AskBatchSplitRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{39}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{41}
 }
 func (m *AskBatchSplitRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2509,7 +2635,7 @@ func (m *SplitID) Reset()         { *m = SplitID{} }
 func (m *SplitID) String() string { return proto.CompactTextString(m) }
 func (*SplitID) ProtoMessage()    {}
 func (*SplitID) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{40}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{42}
 }
 func (m *SplitID) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2564,7 +2690,7 @@ func (m *AskBatchSplitResponse) Reset()         { *m = AskBatchSplitResponse{} }
 func (m *AskBatchSplitResponse) String() string { return proto.CompactTextString(m) }
 func (*AskBatchSplitResponse) ProtoMessage()    {}
 func (*AskBatchSplitResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{41}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{43}
 }
 func (m *AskBatchSplitResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2619,7 +2745,7 @@ func (m *ReportBatchSplitRequest) Reset()         { *m = ReportBatchSplitRequest
 func (m *ReportBatchSplitRequest) String() string { return proto.CompactTextString(m) }
 func (*ReportBatchSplitRequest) ProtoMessage()    {}
 func (*ReportBatchSplitRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{42}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{44}
 }
 func (m *ReportBatchSplitRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2673,7 +2799,7 @@ func (m *ReportBatchSplitResponse) Reset()         { *m = ReportBatchSplitRespon
 func (m *ReportBatchSplitResponse) String() string { return proto.CompactTextString(m) }
 func (*ReportBatchSplitResponse) ProtoMessage()    {}
 func (*ReportBatchSplitResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{43}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{45}
 }
 func (m *ReportBatchSplitResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2723,7 +2849,7 @@ func (m *TimeInterval) Reset()         { *m = TimeInterval{} }
 func (m *TimeInterval) String() string { return proto.CompactTextString(m) }
 func (*TimeInterval) ProtoMessage()    {}
 func (*TimeInterval) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{44}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{46}
 }
 func (m *TimeInterval) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2805,7 +2931,7 @@ func (m *StoreStats) Reset()         { *m = StoreStats{} }
 func (m *StoreStats) String() string { return proto.CompactTextString(m) }
 func (*StoreStats) ProtoMessage()    {}
 func (*StoreStats) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{45}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{47}
 }
 func (m *StoreStats) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2951,7 +3077,7 @@ func (m *StoreHeartbeatRequest) Reset()         { *m = StoreHeartbeatRequest{} }
 func (m *StoreHeartbeatRequest) String() string { return proto.CompactTextString(m) }
 func (*StoreHeartbeatRequest) ProtoMessage()    {}
 func (*StoreHeartbeatRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{46}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{48}
 }
 func (m *StoreHeartbeatRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3005,7 +3131,7 @@ func (m *StoreHeartbeatResponse) Reset()         { *m = StoreHeartbeatResponse{}
 func (m *StoreHeartbeatResponse) String() string { return proto.CompactTextString(m) }
 func (*StoreHeartbeatResponse) ProtoMessage()    {}
 func (*StoreHeartbeatResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{47}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{49}
 }
 func (m *StoreHeartbeatResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3057,7 +3183,7 @@ func (m *ScatterRegionRequest) Reset()         { *m = ScatterRegionRequest{} }
 func (m *ScatterRegionRequest) String() string { return proto.CompactTextString(m) }
 func (*ScatterRegionRequest) ProtoMessage()    {}
 func (*ScatterRegionRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{48}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{50}
 }
 func (m *ScatterRegionRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3125,7 +3251,7 @@ func (m *ScatterRegionResponse) Reset()         { *m = ScatterRegionResponse{} }
 func (m *ScatterRegionResponse) String() string { return proto.CompactTextString(m) }
 func (*ScatterRegionResponse) ProtoMessage()    {}
 func (*ScatterRegionResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{49}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{51}
 }
 func (m *ScatterRegionResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3172,7 +3298,7 @@ func (m *GetGCSafePointRequest) Reset()         { *m = GetGCSafePointRequest{} }
 func (m *GetGCSafePointRequest) String() string { return proto.CompactTextString(m) }
 func (*GetGCSafePointRequest) ProtoMessage()    {}
 func (*GetGCSafePointRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{50}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{52}
 }
 func (m *GetGCSafePointRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3220,7 +3346,7 @@ func (m *GetGCSafePointResponse) Reset()         { *m = GetGCSafePointResponse{}
 func (m *GetGCSafePointResponse) String() string { return proto.CompactTextString(m) }
 func (*GetGCSafePointResponse) ProtoMessage()    {}
 func (*GetGCSafePointResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{51}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{53}
 }
 func (m *GetGCSafePointResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3275,7 +3401,7 @@ func (m *UpdateGCSafePointRequest) Reset()         { *m = UpdateGCSafePointReque
 func (m *UpdateGCSafePointRequest) String() string { return proto.CompactTextString(m) }
 func (*UpdateGCSafePointRequest) ProtoMessage()    {}
 func (*UpdateGCSafePointRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{52}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{54}
 }
 func (m *UpdateGCSafePointRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3330,7 +3456,7 @@ func (m *UpdateGCSafePointResponse) Reset()         { *m = UpdateGCSafePointResp
 func (m *UpdateGCSafePointResponse) String() string { return proto.CompactTextString(m) }
 func (*UpdateGCSafePointResponse) ProtoMessage()    {}
 func (*UpdateGCSafePointResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{53}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{55}
 }
 func (m *UpdateGCSafePointResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3388,7 +3514,7 @@ func (m *SyncRegionRequest) Reset()         { *m = SyncRegionRequest{} }
 func (m *SyncRegionRequest) String() string { return proto.CompactTextString(m) }
 func (*SyncRegionRequest) ProtoMessage()    {}
 func (*SyncRegionRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{54}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{56}
 }
 func (m *SyncRegionRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3453,7 +3579,7 @@ func (m *SyncRegionResponse) Reset()         { *m = SyncRegionResponse{} }
 func (m *SyncRegionResponse) String() string { return proto.CompactTextString(m) }
 func (*SyncRegionResponse) ProtoMessage()    {}
 func (*SyncRegionResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{55}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{57}
 }
 func (m *SyncRegionResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3515,7 +3641,7 @@ func (m *GetOperatorRequest) Reset()         { *m = GetOperatorRequest{} }
 func (m *GetOperatorRequest) String() string { return proto.CompactTextString(m) }
 func (*GetOperatorRequest) ProtoMessage()    {}
 func (*GetOperatorRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{56}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{58}
 }
 func (m *GetOperatorRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3573,7 +3699,7 @@ func (m *GetOperatorResponse) Reset()         { *m = GetOperatorResponse{} }
 func (m *GetOperatorResponse) String() string { return proto.CompactTextString(m) }
 func (*GetOperatorResponse) ProtoMessage()    {}
 func (*GetOperatorResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_pdpb_691bc2ba3660ba2e, []int{57}
+	return fileDescriptor_pdpb_05acc470f20fb1ed, []int{59}
 }
 func (m *GetOperatorResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3659,6 +3785,8 @@ func init() {
 	proto.RegisterType((*GetRegionRequest)(nil), "pdpb.GetRegionRequest")
 	proto.RegisterType((*GetRegionResponse)(nil), "pdpb.GetRegionResponse")
 	proto.RegisterType((*GetRegionByIDRequest)(nil), "pdpb.GetRegionByIDRequest")
+	proto.RegisterType((*ScanRegionsRequest)(nil), "pdpb.ScanRegionsRequest")
+	proto.RegisterType((*ScanRegionsResponse)(nil), "pdpb.ScanRegionsResponse")
 	proto.RegisterType((*GetClusterConfigRequest)(nil), "pdpb.GetClusterConfigRequest")
 	proto.RegisterType((*GetClusterConfigResponse)(nil), "pdpb.GetClusterConfigResponse")
 	proto.RegisterType((*PutClusterConfigRequest)(nil), "pdpb.PutClusterConfigRequest")
@@ -3727,6 +3855,7 @@ type PDClient interface {
 	GetRegion(ctx context.Context, in *GetRegionRequest, opts ...grpc.CallOption) (*GetRegionResponse, error)
 	GetPrevRegion(ctx context.Context, in *GetRegionRequest, opts ...grpc.CallOption) (*GetRegionResponse, error)
 	GetRegionByID(ctx context.Context, in *GetRegionByIDRequest, opts ...grpc.CallOption) (*GetRegionResponse, error)
+	ScanRegions(ctx context.Context, in *ScanRegionsRequest, opts ...grpc.CallOption) (*ScanRegionsResponse, error)
 	AskSplit(ctx context.Context, in *AskSplitRequest, opts ...grpc.CallOption) (*AskSplitResponse, error)
 	ReportSplit(ctx context.Context, in *ReportSplitRequest, opts ...grpc.CallOption) (*ReportSplitResponse, error)
 	AskBatchSplit(ctx context.Context, in *AskBatchSplitRequest, opts ...grpc.CallOption) (*AskBatchSplitResponse, error)
@@ -3909,6 +4038,15 @@ func (c *pDClient) GetRegionByID(ctx context.Context, in *GetRegionByIDRequest,
 	return out, nil
 }
 
+func (c *pDClient) ScanRegions(ctx context.Context, in *ScanRegionsRequest, opts ...grpc.CallOption) (*ScanRegionsResponse, error) {
+	out := new(ScanRegionsResponse)
+	err := c.cc.Invoke(ctx, "/pdpb.PD/ScanRegions", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Deprecated: Do not use.
 func (c *pDClient) AskSplit(ctx context.Context, in *AskSplitRequest, opts ...grpc.CallOption) (*AskSplitResponse, error) {
 	out := new(AskSplitResponse)
@@ -4050,6 +4188,7 @@ type PDServer interface {
 	GetRegion(context.Context, *GetRegionRequest) (*GetRegionResponse, error)
 	GetPrevRegion(context.Context, *GetRegionRequest) (*GetRegionResponse, error)
 	GetRegionByID(context.Context, *GetRegionByIDRequest) (*GetRegionResponse, error)
+	ScanRegions(context.Context, *ScanRegionsRequest) (*ScanRegionsResponse, error)
 	AskSplit(context.Context, *AskSplitRequest) (*AskSplitResponse, error)
 	ReportSplit(context.Context, *ReportSplitRequest) (*ReportSplitResponse, error)
 	AskBatchSplit(context.Context, *AskBatchSplitRequest) (*AskBatchSplitResponse, error)
@@ -4317,6 +4456,24 @@ func _PD_GetRegionByID_Handler(srv interface{}, ctx context.Context, dec func(in
 	return interceptor(ctx, in, info, handler)
 }
 
+func _PD_ScanRegions_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ScanRegionsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(PDServer).ScanRegions(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/pdpb.PD/ScanRegions",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(PDServer).ScanRegions(ctx, req.(*ScanRegionsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _PD_AskSplit_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(AskSplitRequest)
 	if err := dec(in); err != nil {
@@ -4571,6 +4728,10 @@ var _PD_serviceDesc = grpc.ServiceDesc{
 			MethodName: "GetRegionByID",
 			Handler:    _PD_GetRegionByID_Handler,
 		},
+		{
+			MethodName: "ScanRegions",
+			Handler:    _PD_ScanRegions_Handler,
+		},
 		{
 			MethodName: "AskSplit",
 			Handler:    _PD_AskSplit_Handler,
@@ -5442,7 +5603,7 @@ func (m *GetRegionByIDRequest) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
-func (m *GetClusterConfigRequest) Marshal() (dAtA []byte, err error) {
+func (m *ScanRegionsRequest) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
 	n, err := m.MarshalTo(dAtA)
@@ -5452,7 +5613,7 @@ func (m *GetClusterConfigRequest) Marshal() (dAtA []byte, err error) {
 	return dAtA[:n], nil
 }
 
-func (m *GetClusterConfigRequest) MarshalTo(dAtA []byte) (int, error) {
+func (m *ScanRegionsRequest) MarshalTo(dAtA []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -5467,13 +5628,24 @@ func (m *GetClusterConfigRequest) MarshalTo(dAtA []byte) (int, error) {
 		}
 		i += n27
 	}
+	if len(m.StartKey) > 0 {
+		dAtA[i] = 0x12
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(len(m.StartKey)))
+		i += copy(dAtA[i:], m.StartKey)
+	}
+	if m.Limit != 0 {
+		dAtA[i] = 0x18
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(m.Limit))
+	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
 	}
 	return i, nil
 }
 
-func (m *GetClusterConfigResponse) Marshal() (dAtA []byte, err error) {
+func (m *ScanRegionsResponse) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
 	n, err := m.MarshalTo(dAtA)
@@ -5483,7 +5655,7 @@ func (m *GetClusterConfigResponse) Marshal() (dAtA []byte, err error) {
 	return dAtA[:n], nil
 }
 
-func (m *GetClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
+func (m *ScanRegionsResponse) MarshalTo(dAtA []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -5498,11 +5670,56 @@ func (m *GetClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
 		}
 		i += n28
 	}
-	if m.Cluster != nil {
-		dAtA[i] = 0x12
+	if len(m.Regions) > 0 {
+		for _, msg := range m.Regions {
+			dAtA[i] = 0x12
+			i++
+			i = encodeVarintPdpb(dAtA, i, uint64(msg.Size()))
+			n, err := msg.MarshalTo(dAtA[i:])
+			if err != nil {
+				return 0, err
+			}
+			i += n
+		}
+	}
+	if len(m.Leaders) > 0 {
+		for _, msg := range m.Leaders {
+			dAtA[i] = 0x1a
+			i++
+			i = encodeVarintPdpb(dAtA, i, uint64(msg.Size()))
+			n, err := msg.MarshalTo(dAtA[i:])
+			if err != nil {
+				return 0, err
+			}
+			i += n
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		i += copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	return i, nil
+}
+
+func (m *GetClusterConfigRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *GetClusterConfigRequest) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if m.Header != nil {
+		dAtA[i] = 0xa
 		i++
-		i = encodeVarintPdpb(dAtA, i, uint64(m.Cluster.Size()))
-		n29, err := m.Cluster.MarshalTo(dAtA[i:])
+		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
+		n29, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
@@ -5514,7 +5731,7 @@ func (m *GetClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
-func (m *PutClusterConfigRequest) Marshal() (dAtA []byte, err error) {
+func (m *GetClusterConfigResponse) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
 	n, err := m.MarshalTo(dAtA)
@@ -5524,7 +5741,7 @@ func (m *PutClusterConfigRequest) Marshal() (dAtA []byte, err error) {
 	return dAtA[:n], nil
 }
 
-func (m *PutClusterConfigRequest) MarshalTo(dAtA []byte) (int, error) {
+func (m *GetClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -5555,7 +5772,7 @@ func (m *PutClusterConfigRequest) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
-func (m *PutClusterConfigResponse) Marshal() (dAtA []byte, err error) {
+func (m *PutClusterConfigRequest) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
 	n, err := m.MarshalTo(dAtA)
@@ -5565,7 +5782,7 @@ func (m *PutClusterConfigResponse) Marshal() (dAtA []byte, err error) {
 	return dAtA[:n], nil
 }
 
-func (m *PutClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
+func (m *PutClusterConfigRequest) MarshalTo(dAtA []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -5580,6 +5797,47 @@ func (m *PutClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
 		}
 		i += n32
 	}
+	if m.Cluster != nil {
+		dAtA[i] = 0x12
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(m.Cluster.Size()))
+		n33, err := m.Cluster.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n33
+	}
+	if m.XXX_unrecognized != nil {
+		i += copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	return i, nil
+}
+
+func (m *PutClusterConfigResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *PutClusterConfigResponse) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if m.Header != nil {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
+		n34, err := m.Header.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n34
+	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
 	}
@@ -5672,11 +5930,11 @@ func (m *GetMembersRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n33, err := m.Header.MarshalTo(dAtA[i:])
+		n35, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n33
+		i += n35
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -5703,11 +5961,11 @@ func (m *GetMembersResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n34, err := m.Header.MarshalTo(dAtA[i:])
+		n36, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n34
+		i += n36
 	}
 	if len(m.Members) > 0 {
 		for _, msg := range m.Members {
@@ -5725,21 +5983,21 @@ func (m *GetMembersResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x1a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Leader.Size()))
-		n35, err := m.Leader.MarshalTo(dAtA[i:])
+		n37, err := m.Leader.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n35
+		i += n37
 	}
 	if m.EtcdLeader != nil {
 		dAtA[i] = 0x22
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.EtcdLeader.Size()))
-		n36, err := m.EtcdLeader.MarshalTo(dAtA[i:])
+		n38, err := m.EtcdLeader.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n36
+		i += n38
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -5766,11 +6024,11 @@ func (m *PeerStats) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Peer.Size()))
-		n37, err := m.Peer.MarshalTo(dAtA[i:])
+		n39, err := m.Peer.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n37
+		i += n39
 	}
 	if m.DownSeconds != 0 {
 		dAtA[i] = 0x10
@@ -5802,31 +6060,31 @@ func (m *RegionHeartbeatRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n38, err := m.Header.MarshalTo(dAtA[i:])
+		n40, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n38
+		i += n40
 	}
 	if m.Region != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Region.Size()))
-		n39, err := m.Region.MarshalTo(dAtA[i:])
+		n41, err := m.Region.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n39
+		i += n41
 	}
 	if m.Leader != nil {
 		dAtA[i] = 0x1a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Leader.Size()))
-		n40, err := m.Leader.MarshalTo(dAtA[i:])
+		n42, err := m.Leader.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n40
+		i += n42
 	}
 	if len(m.DownPeers) > 0 {
 		for _, msg := range m.DownPeers {
@@ -5881,11 +6139,11 @@ func (m *RegionHeartbeatRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x62
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Interval.Size()))
-		n41, err := m.Interval.MarshalTo(dAtA[i:])
+		n43, err := m.Interval.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n41
+		i += n43
 	}
 	if m.ApproximateKeys != 0 {
 		dAtA[i] = 0x68
@@ -5917,11 +6175,11 @@ func (m *ChangePeer) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Peer.Size()))
-		n42, err := m.Peer.MarshalTo(dAtA[i:])
+		n44, err := m.Peer.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n42
+		i += n44
 	}
 	if m.ChangeType != 0 {
 		dAtA[i] = 0x10
@@ -5953,11 +6211,11 @@ func (m *TransferLeader) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Peer.Size()))
-		n43, err := m.Peer.MarshalTo(dAtA[i:])
+		n45, err := m.Peer.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n43
+		i += n45
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -5984,11 +6242,11 @@ func (m *Merge) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Target.Size()))
-		n44, err := m.Target.MarshalTo(dAtA[i:])
+		n46, err := m.Target.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n44
+		i += n46
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6041,31 +6299,31 @@ func (m *RegionHeartbeatResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n45, err := m.Header.MarshalTo(dAtA[i:])
+		n47, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n45
+		i += n47
 	}
 	if m.ChangePeer != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.ChangePeer.Size()))
-		n46, err := m.ChangePeer.MarshalTo(dAtA[i:])
+		n48, err := m.ChangePeer.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n46
+		i += n48
 	}
 	if m.TransferLeader != nil {
 		dAtA[i] = 0x1a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.TransferLeader.Size()))
-		n47, err := m.TransferLeader.MarshalTo(dAtA[i:])
+		n49, err := m.TransferLeader.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n47
+		i += n49
 	}
 	if m.RegionId != 0 {
 		dAtA[i] = 0x20
@@ -6076,41 +6334,41 @@ func (m *RegionHeartbeatResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x2a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.RegionEpoch.Size()))
-		n48, err := m.RegionEpoch.MarshalTo(dAtA[i:])
+		n50, err := m.RegionEpoch.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n48
+		i += n50
 	}
 	if m.TargetPeer != nil {
 		dAtA[i] = 0x32
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.TargetPeer.Size()))
-		n49, err := m.TargetPeer.MarshalTo(dAtA[i:])
+		n51, err := m.TargetPeer.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n49
+		i += n51
 	}
 	if m.Merge != nil {
 		dAtA[i] = 0x3a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Merge.Size()))
-		n50, err := m.Merge.MarshalTo(dAtA[i:])
+		n52, err := m.Merge.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n50
+		i += n52
 	}
 	if m.SplitRegion != nil {
 		dAtA[i] = 0x42
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.SplitRegion.Size()))
-		n51, err := m.SplitRegion.MarshalTo(dAtA[i:])
+		n53, err := m.SplitRegion.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n51
+		i += n53
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6137,21 +6395,21 @@ func (m *AskSplitRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n52, err := m.Header.MarshalTo(dAtA[i:])
+		n54, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n52
+		i += n54
 	}
 	if m.Region != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Region.Size()))
-		n53, err := m.Region.MarshalTo(dAtA[i:])
+		n55, err := m.Region.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n53
+		i += n55
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6178,11 +6436,11 @@ func (m *AskSplitResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n54, err := m.Header.MarshalTo(dAtA[i:])
+		n56, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n54
+		i += n56
 	}
 	if m.NewRegionId != 0 {
 		dAtA[i] = 0x10
@@ -6190,21 +6448,21 @@ func (m *AskSplitResponse) MarshalTo(dAtA []byte) (int, error) {
 		i = encodeVarintPdpb(dAtA, i, uint64(m.NewRegionId))
 	}
 	if len(m.NewPeerIds) > 0 {
-		dAtA56 := make([]byte, len(m.NewPeerIds)*10)
-		var j55 int
+		dAtA58 := make([]byte, len(m.NewPeerIds)*10)
+		var j57 int
 		for _, num := range m.NewPeerIds {
 			for num >= 1<<7 {
-				dAtA56[j55] = uint8(uint64(num)&0x7f | 0x80)
+				dAtA58[j57] = uint8(uint64(num)&0x7f | 0x80)
 				num >>= 7
-				j55++
+				j57++
 			}
-			dAtA56[j55] = uint8(num)
-			j55++
+			dAtA58[j57] = uint8(num)
+			j57++
 		}
 		dAtA[i] = 0x1a
 		i++
-		i = encodeVarintPdpb(dAtA, i, uint64(j55))
-		i += copy(dAtA[i:], dAtA56[:j55])
+		i = encodeVarintPdpb(dAtA, i, uint64(j57))
+		i += copy(dAtA[i:], dAtA58[:j57])
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6231,31 +6489,31 @@ func (m *ReportSplitRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n57, err := m.Header.MarshalTo(dAtA[i:])
+		n59, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n57
+		i += n59
 	}
 	if m.Left != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Left.Size()))
-		n58, err := m.Left.MarshalTo(dAtA[i:])
+		n60, err := m.Left.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n58
+		i += n60
 	}
 	if m.Right != nil {
 		dAtA[i] = 0x1a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Right.Size()))
-		n59, err := m.Right.MarshalTo(dAtA[i:])
+		n61, err := m.Right.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n59
+		i += n61
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6282,11 +6540,11 @@ func (m *ReportSplitResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n60, err := m.Header.MarshalTo(dAtA[i:])
+		n62, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n60
+		i += n62
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6313,21 +6571,21 @@ func (m *AskBatchSplitRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n61, err := m.Header.MarshalTo(dAtA[i:])
+		n63, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n61
+		i += n63
 	}
 	if m.Region != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Region.Size()))
-		n62, err := m.Region.MarshalTo(dAtA[i:])
+		n64, err := m.Region.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n62
+		i += n64
 	}
 	if m.SplitCount != 0 {
 		dAtA[i] = 0x18
@@ -6361,21 +6619,21 @@ func (m *SplitID) MarshalTo(dAtA []byte) (int, error) {
 		i = encodeVarintPdpb(dAtA, i, uint64(m.NewRegionId))
 	}
 	if len(m.NewPeerIds) > 0 {
-		dAtA64 := make([]byte, len(m.NewPeerIds)*10)
-		var j63 int
+		dAtA66 := make([]byte, len(m.NewPeerIds)*10)
+		var j65 int
 		for _, num := range m.NewPeerIds {
 			for num >= 1<<7 {
-				dAtA64[j63] = uint8(uint64(num)&0x7f | 0x80)
+				dAtA66[j65] = uint8(uint64(num)&0x7f | 0x80)
 				num >>= 7
-				j63++
+				j65++
 			}
-			dAtA64[j63] = uint8(num)
-			j63++
+			dAtA66[j65] = uint8(num)
+			j65++
 		}
 		dAtA[i] = 0x12
 		i++
-		i = encodeVarintPdpb(dAtA, i, uint64(j63))
-		i += copy(dAtA[i:], dAtA64[:j63])
+		i = encodeVarintPdpb(dAtA, i, uint64(j65))
+		i += copy(dAtA[i:], dAtA66[:j65])
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6402,11 +6660,11 @@ func (m *AskBatchSplitResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n65, err := m.Header.MarshalTo(dAtA[i:])
+		n67, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n65
+		i += n67
 	}
 	if len(m.Ids) > 0 {
 		for _, msg := range m.Ids {
@@ -6445,11 +6703,11 @@ func (m *ReportBatchSplitRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n66, err := m.Header.MarshalTo(dAtA[i:])
+		n68, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n66
+		i += n68
 	}
 	if len(m.Regions) > 0 {
 		for _, msg := range m.Regions {
@@ -6488,11 +6746,11 @@ func (m *ReportBatchSplitResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n67, err := m.Header.MarshalTo(dAtA[i:])
+		n69, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n67
+		i += n69
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6625,11 +6883,11 @@ func (m *StoreStats) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x7a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Interval.Size()))
-		n68, err := m.Interval.MarshalTo(dAtA[i:])
+		n70, err := m.Interval.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n68
+		i += n70
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6656,21 +6914,21 @@ func (m *StoreHeartbeatRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n69, err := m.Header.MarshalTo(dAtA[i:])
+		n71, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n69
+		i += n71
 	}
 	if m.Stats != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Stats.Size()))
-		n70, err := m.Stats.MarshalTo(dAtA[i:])
+		n72, err := m.Stats.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n70
+		i += n72
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6697,11 +6955,11 @@ func (m *StoreHeartbeatResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n71, err := m.Header.MarshalTo(dAtA[i:])
+		n73, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n71
+		i += n73
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6728,11 +6986,11 @@ func (m *ScatterRegionRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n72, err := m.Header.MarshalTo(dAtA[i:])
+		n74, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n72
+		i += n74
 	}
 	if m.RegionId != 0 {
 		dAtA[i] = 0x10
@@ -6743,21 +7001,21 @@ func (m *ScatterRegionRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x1a
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Region.Size()))
-		n73, err := m.Region.MarshalTo(dAtA[i:])
+		n75, err := m.Region.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n73
+		i += n75
 	}
 	if m.Leader != nil {
 		dAtA[i] = 0x22
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Leader.Size()))
-		n74, err := m.Leader.MarshalTo(dAtA[i:])
+		n76, err := m.Leader.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n74
+		i += n76
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6784,11 +7042,11 @@ func (m *ScatterRegionResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n75, err := m.Header.MarshalTo(dAtA[i:])
+		n77, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n75
+		i += n77
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6815,11 +7073,11 @@ func (m *GetGCSafePointRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n76, err := m.Header.MarshalTo(dAtA[i:])
+		n78, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n76
+		i += n78
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -6846,11 +7104,11 @@ func (m *GetGCSafePointResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n77, err := m.Header.MarshalTo(dAtA[i:])
+		n79, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n77
+		i += n79
 	}
 	if m.SafePoint != 0 {
 		dAtA[i] = 0x10
@@ -6882,11 +7140,11 @@ func (m *UpdateGCSafePointRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n78, err := m.Header.MarshalTo(dAtA[i:])
+		n80, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n78
+		i += n80
 	}
 	if m.SafePoint != 0 {
 		dAtA[i] = 0x10
@@ -6918,11 +7176,11 @@ func (m *UpdateGCSafePointResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n79, err := m.Header.MarshalTo(dAtA[i:])
+		n81, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n79
+		i += n81
 	}
 	if m.NewSafePoint != 0 {
 		dAtA[i] = 0x10
@@ -6954,21 +7212,21 @@ func (m *SyncRegionRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n80, err := m.Header.MarshalTo(dAtA[i:])
+		n82, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n80
+		i += n82
 	}
 	if m.Member != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Member.Size()))
-		n81, err := m.Member.MarshalTo(dAtA[i:])
+		n83, err := m.Member.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n81
+		i += n83
 	}
 	if m.StartIndex != 0 {
 		dAtA[i] = 0x18
@@ -7000,11 +7258,11 @@ func (m *SyncRegionResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n82, err := m.Header.MarshalTo(dAtA[i:])
+		n84, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n82
+		i += n84
 	}
 	if len(m.Regions) > 0 {
 		for _, msg := range m.Regions {
@@ -7048,11 +7306,11 @@ func (m *GetOperatorRequest) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n83, err := m.Header.MarshalTo(dAtA[i:])
+		n85, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n83
+		i += n85
 	}
 	if m.RegionId != 0 {
 		dAtA[i] = 0x10
@@ -7084,11 +7342,11 @@ func (m *GetOperatorResponse) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintPdpb(dAtA, i, uint64(m.Header.Size()))
-		n84, err := m.Header.MarshalTo(dAtA[i:])
+		n86, err := m.Header.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n84
+		i += n86
 	}
 	if m.RegionId != 0 {
 		dAtA[i] = 0x10
@@ -7476,6 +7734,51 @@ func (m *GetRegionByIDRequest) Size() (n int) {
 	return n
 }
 
+func (m *ScanRegionsRequest) Size() (n int) {
+	var l int
+	_ = l
+	if m.Header != nil {
+		l = m.Header.Size()
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	l = len(m.StartKey)
+	if l > 0 {
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	if m.Limit != 0 {
+		n += 1 + sovPdpb(uint64(m.Limit))
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func (m *ScanRegionsResponse) Size() (n int) {
+	var l int
+	_ = l
+	if m.Header != nil {
+		l = m.Header.Size()
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	if len(m.Regions) > 0 {
+		for _, e := range m.Regions {
+			l = e.Size()
+			n += 1 + l + sovPdpb(uint64(l))
+		}
+	}
+	if len(m.Leaders) > 0 {
+		for _, e := range m.Leaders {
+			l = e.Size()
+			n += 1 + l + sovPdpb(uint64(l))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
 func (m *GetClusterConfigRequest) Size() (n int) {
 	var l int
 	_ = l
@@ -10513,6 +10816,286 @@ func (m *GetRegionByIDRequest) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *ScanRegionsRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowPdpb
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ScanRegionsRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ScanRegionsRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Header", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Header == nil {
+				m.Header = &RequestHeader{}
+			}
+			if err := m.Header.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field StartKey", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.StartKey = append(m.StartKey[:0], dAtA[iNdEx:postIndex]...)
+			if m.StartKey == nil {
+				m.StartKey = []byte{}
+			}
+			iNdEx = postIndex
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Limit", wireType)
+			}
+			m.Limit = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Limit |= (int32(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipPdpb(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *ScanRegionsResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowPdpb
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ScanRegionsResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ScanRegionsResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Header", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Header == nil {
+				m.Header = &ResponseHeader{}
+			}
+			if err := m.Header.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Regions", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Regions = append(m.Regions, &metapb.Region{})
+			if err := m.Regions[len(m.Regions)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Leaders", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Leaders = append(m.Leaders, &metapb.Peer{})
+			if err := m.Leaders[len(m.Leaders)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipPdpb(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthPdpb
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func (m *GetClusterConfigRequest) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
@@ -15507,171 +16090,176 @@ var (
 	ErrIntOverflowPdpb   = fmt.Errorf("proto: integer overflow")
 )
 
-func init() { proto.RegisterFile("pdpb.proto", fileDescriptor_pdpb_691bc2ba3660ba2e) }
-
-var fileDescriptor_pdpb_691bc2ba3660ba2e = []byte{
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+func init() { proto.RegisterFile("pdpb.proto", fileDescriptor_pdpb_05acc470f20fb1ed) }
+
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+	0x5f, 0xbe, 0x94, 0x1f, 0x39, 0x54, 0xa5, 0x30, 0x83, 0x0a, 0xee, 0x9f, 0x85, 0xf4, 0x4e, 0xdf,
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+	0xb6, 0xf1, 0xcf, 0x6f, 0x6f, 0x1b, 0xff, 0xfe, 0xf6, 0xb6, 0xf1, 0x87, 0xff, 0xdc, 0x5e, 0x81,
+	0xba, 0xe3, 0x1d, 0x6f, 0x33, 0xeb, 0xf4, 0x62, 0xfb, 0xf4, 0x42, 0xfc, 0x5b, 0xd4, 0x61, 0x5e,
+	0xfc, 0xf9, 0xe1, 0x7f, 0x03, 0x00, 0x00, 0xff, 0xff, 0xe0, 0x98, 0x59, 0x05, 0x75, 0x25, 0x00,
+	0x00,
 }
diff --git a/proto/pdpb.proto b/proto/pdpb.proto
index 2aa6b8aee..3125fe29c 100644
--- a/proto/pdpb.proto
+++ b/proto/pdpb.proto
@@ -43,6 +43,8 @@ service PD {
 
     rpc GetRegionByID(GetRegionByIDRequest) returns (GetRegionResponse) {}
 
+    rpc ScanRegions(ScanRegionsRequest) returns (ScanRegionsResponse) {}
+
     rpc AskSplit(AskSplitRequest) returns (AskSplitResponse) {
         // Use AskBatchSplit instead.
         option deprecated = true;
@@ -204,6 +206,20 @@ message GetRegionByIDRequest {
 
 // Use GetRegionResponse as the response of GetRegionByIDRequest.
 
+message ScanRegionsRequest {
+    RequestHeader header = 1;
+
+    bytes start_key = 2;
+    int32 limit = 3;
+}
+
+message ScanRegionsResponse {
+    ResponseHeader header = 1;
+
+    repeated metapb.Region regions = 2;
+    repeated metapb.Peer leaders = 3;
+}
+
 message GetClusterConfigRequest {
     RequestHeader header = 1;
 }
diff --git a/src/prost.rs b/src/prost.rs
index fde402c5d..1e12c0341 100644
--- a/src/prost.rs
+++ b/src/prost.rs
@@ -2,59 +2,31 @@
 
 pub use raft::eraftpb;
 
-pub mod coprocessor {
-    include!("prost/coprocessor.rs");
-    include!("prost/wrapper_coprocessor.rs");
-}
-pub mod deadlockpb {
-    include!("prost/deadlockpb.rs");
-    include!("prost/wrapper_deadlockpb.rs");
-}
-pub mod debugpb {
-    include!("prost/debugpb.rs");
-    include!("prost/wrapper_debugpb.rs");
-}
-pub mod enginepb {
-    include!("prost/enginepb.rs");
-    include!("prost/wrapper_enginepb.rs");
-}
-pub mod errorpb {
-    include!("prost/errorpb.rs");
-    include!("prost/wrapper_errorpb.rs");
-}
-pub mod import_kvpb {
-    include!("prost/import_kvpb.rs");
-    include!("prost/wrapper_import_kvpb.rs");
-}
-pub mod import_sstpb {
-    include!("prost/import_sstpb.rs");
-    include!("prost/wrapper_import_sstpb.rs");
-}
-pub mod kvrpcpb {
-    include!("prost/kvrpcpb.rs");
-    include!("prost/wrapper_kvrpcpb.rs");
-}
-pub mod metapb {
-    include!("prost/metapb.rs");
-    include!("prost/wrapper_metapb.rs");
-}
-pub mod pdpb {
-    include!("prost/pdpb.rs");
-    include!("prost/wrapper_pdpb.rs");
-}
-pub mod raft_cmdpb {
-    include!("prost/raft_cmdpb.rs");
-    include!("prost/wrapper_raft_cmdpb.rs");
-}
-pub mod raft_serverpb {
-    include!("prost/raft_serverpb.rs");
-    include!("prost/wrapper_raft_serverpb.rs");
-}
-pub mod rustproto {
-    include!("prost/rustproto.rs");
-    include!("prost/wrapper_rustproto.rs");
-}
-pub mod tikvpb {
-    include!("prost/tikvpb.rs");
-    include!("prost/wrapper_tikvpb.rs");
-}
+pub mod coprocessor{
+include!("prost/coprocessor.rs");include!("prost/wrapper_coprocessor.rs");}
+pub mod deadlockpb{
+include!("prost/deadlockpb.rs");include!("prost/wrapper_deadlockpb.rs");}
+pub mod debugpb{
+include!("prost/debugpb.rs");include!("prost/wrapper_debugpb.rs");}
+pub mod enginepb{
+include!("prost/enginepb.rs");include!("prost/wrapper_enginepb.rs");}
+pub mod errorpb{
+include!("prost/errorpb.rs");include!("prost/wrapper_errorpb.rs");}
+pub mod import_kvpb{
+include!("prost/import_kvpb.rs");include!("prost/wrapper_import_kvpb.rs");}
+pub mod import_sstpb{
+include!("prost/import_sstpb.rs");include!("prost/wrapper_import_sstpb.rs");}
+pub mod kvrpcpb{
+include!("prost/kvrpcpb.rs");include!("prost/wrapper_kvrpcpb.rs");}
+pub mod metapb{
+include!("prost/metapb.rs");include!("prost/wrapper_metapb.rs");}
+pub mod pdpb{
+include!("prost/pdpb.rs");include!("prost/wrapper_pdpb.rs");}
+pub mod raft_cmdpb{
+include!("prost/raft_cmdpb.rs");include!("prost/wrapper_raft_cmdpb.rs");}
+pub mod raft_serverpb{
+include!("prost/raft_serverpb.rs");include!("prost/wrapper_raft_serverpb.rs");}
+pub mod rustproto{
+include!("prost/rustproto.rs");include!("prost/wrapper_rustproto.rs");}
+pub mod tikvpb{
+include!("prost/tikvpb.rs");include!("prost/wrapper_tikvpb.rs");}
diff --git a/src/prost/pdpb.rs b/src/prost/pdpb.rs
index 3fa0f34b8..55abac559 100644
--- a/src/prost/pdpb.rs
+++ b/src/prost/pdpb.rs
@@ -150,6 +150,24 @@ pub struct GetRegionByIdRequest {
 }
 // Use GetRegionResponse as the response of GetRegionByIDRequest.
 
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ScanRegionsRequest {
+    #[prost(message, optional, tag="1")]
+    pub header: ::std::option::Option<RequestHeader>,
+    #[prost(bytes, tag="2")]
+    pub start_key: std::vec::Vec<u8>,
+    #[prost(int32, tag="3")]
+    pub limit: i32,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ScanRegionsResponse {
+    #[prost(message, optional, tag="1")]
+    pub header: ::std::option::Option<ResponseHeader>,
+    #[prost(message, repeated, tag="2")]
+    pub regions: ::std::vec::Vec<super::metapb::Region>,
+    #[prost(message, repeated, tag="3")]
+    pub leaders: ::std::vec::Vec<super::metapb::Peer>,
+}
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct GetClusterConfigRequest {
     #[prost(message, optional, tag="1")]
@@ -569,6 +587,7 @@ const METHOD_PD_REGION_HEARTBEAT: ::grpcio::Method<RegionHeartbeatRequest, Regio
 const METHOD_PD_GET_REGION: ::grpcio::Method<GetRegionRequest, GetRegionResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/GetRegion", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
 const METHOD_PD_GET_PREV_REGION: ::grpcio::Method<GetRegionRequest, GetRegionResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/GetPrevRegion", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
 const METHOD_PD_GET_REGION_BY_ID: ::grpcio::Method<GetRegionByIdRequest, GetRegionResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/GetRegionByID", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
+const METHOD_PD_SCAN_REGIONS: ::grpcio::Method<ScanRegionsRequest, ScanRegionsResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/ScanRegions", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
 const METHOD_PD_ASK_SPLIT: ::grpcio::Method<AskSplitRequest, AskSplitResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/AskSplit", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
 const METHOD_PD_REPORT_SPLIT: ::grpcio::Method<ReportSplitRequest, ReportSplitResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/ReportSplit", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
 const METHOD_PD_ASK_BATCH_SPLIT: ::grpcio::Method<AskBatchSplitRequest, AskBatchSplitResponse> = ::grpcio::Method{ty: ::grpcio::MethodType::Unary, name: "/pdpb.PD/AskBatchSplit", req_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, resp_mar: ::grpcio::Marshaller { ser: ::grpcio::pr_ser, de: ::grpcio::pr_de }, };
@@ -632,6 +651,10 @@ pub fn get_region_by_id_opt(&self, req: &GetRegionByIdRequest, opt: ::grpcio::Ca
 pub fn get_region_by_id(&self, req: &GetRegionByIdRequest) -> ::grpcio::Result<GetRegionResponse,> { self.get_region_by_id_opt(req, ::grpcio::CallOption::default()) }
 pub fn get_region_by_id_async_opt(&self, req: &GetRegionByIdRequest, opt: ::grpcio::CallOption) -> ::grpcio::Result<::grpcio::ClientUnaryReceiver<GetRegionResponse>,> { self.client.unary_call_async(&METHOD_PD_GET_REGION_BY_ID, req, opt) }
 pub fn get_region_by_id_async(&self, req: &GetRegionByIdRequest) -> ::grpcio::Result<::grpcio::ClientUnaryReceiver<GetRegionResponse>,> { self.get_region_by_id_async_opt(req, ::grpcio::CallOption::default()) }
+pub fn scan_regions_opt(&self, req: &ScanRegionsRequest, opt: ::grpcio::CallOption) -> ::grpcio::Result<ScanRegionsResponse,> { self.client.unary_call(&METHOD_PD_SCAN_REGIONS, req, opt) }
+pub fn scan_regions(&self, req: &ScanRegionsRequest) -> ::grpcio::Result<ScanRegionsResponse,> { self.scan_regions_opt(req, ::grpcio::CallOption::default()) }
+pub fn scan_regions_async_opt(&self, req: &ScanRegionsRequest, opt: ::grpcio::CallOption) -> ::grpcio::Result<::grpcio::ClientUnaryReceiver<ScanRegionsResponse>,> { self.client.unary_call_async(&METHOD_PD_SCAN_REGIONS, req, opt) }
+pub fn scan_regions_async(&self, req: &ScanRegionsRequest) -> ::grpcio::Result<::grpcio::ClientUnaryReceiver<ScanRegionsResponse>,> { self.scan_regions_async_opt(req, ::grpcio::CallOption::default()) }
 pub fn ask_split_opt(&self, req: &AskSplitRequest, opt: ::grpcio::CallOption) -> ::grpcio::Result<AskSplitResponse,> { self.client.unary_call(&METHOD_PD_ASK_SPLIT, req, opt) }
 pub fn ask_split(&self, req: &AskSplitRequest) -> ::grpcio::Result<AskSplitResponse,> { self.ask_split_opt(req, ::grpcio::CallOption::default()) }
 pub fn ask_split_async_opt(&self, req: &AskSplitRequest, opt: ::grpcio::CallOption) -> ::grpcio::Result<::grpcio::ClientUnaryReceiver<AskSplitResponse>,> { self.client.unary_call_async(&METHOD_PD_ASK_SPLIT, req, opt) }
@@ -690,6 +713,7 @@ fn region_heartbeat(&mut self, ctx: ::grpcio::RpcContext, stream: ::grpcio::Requ
 fn get_region(&mut self, ctx: ::grpcio::RpcContext, req: GetRegionRequest, sink: ::grpcio::UnarySink<GetRegionResponse>);
 fn get_prev_region(&mut self, ctx: ::grpcio::RpcContext, req: GetRegionRequest, sink: ::grpcio::UnarySink<GetRegionResponse>);
 fn get_region_by_id(&mut self, ctx: ::grpcio::RpcContext, req: GetRegionByIdRequest, sink: ::grpcio::UnarySink<GetRegionResponse>);
+fn scan_regions(&mut self, ctx: ::grpcio::RpcContext, req: ScanRegionsRequest, sink: ::grpcio::UnarySink<ScanRegionsResponse>);
 fn ask_split(&mut self, ctx: ::grpcio::RpcContext, req: AskSplitRequest, sink: ::grpcio::UnarySink<AskSplitResponse>);
 fn report_split(&mut self, ctx: ::grpcio::RpcContext, req: ReportSplitRequest, sink: ::grpcio::UnarySink<ReportSplitResponse>);
 fn ask_batch_split(&mut self, ctx: ::grpcio::RpcContext, req: AskBatchSplitRequest, sink: ::grpcio::UnarySink<AskBatchSplitResponse>);
@@ -731,6 +755,8 @@ builder = builder.add_unary_handler(&METHOD_PD_GET_PREV_REGION, move |ctx, req,
 let mut instance = s.clone();
 builder = builder.add_unary_handler(&METHOD_PD_GET_REGION_BY_ID, move |ctx, req, resp| instance.get_region_by_id(ctx, req, resp));
 let mut instance = s.clone();
+builder = builder.add_unary_handler(&METHOD_PD_SCAN_REGIONS, move |ctx, req, resp| instance.scan_regions(ctx, req, resp));
+let mut instance = s.clone();
 builder = builder.add_unary_handler(&METHOD_PD_ASK_SPLIT, move |ctx, req, resp| instance.ask_split(ctx, req, resp));
 let mut instance = s.clone();
 builder = builder.add_unary_handler(&METHOD_PD_REPORT_SPLIT, move |ctx, req, resp| instance.report_split(ctx, req, resp));
diff --git a/src/prost/wrapper_pdpb.rs b/src/prost/wrapper_pdpb.rs
index ae610a04f..31e72ec01 100644
--- a/src/prost/wrapper_pdpb.rs
+++ b/src/prost/wrapper_pdpb.rs
@@ -1103,6 +1103,118 @@ fn merge_from_bytes(&mut self, bytes: &[u8]) -> ::protobuf::ProtobufResult<()> {
             Ok(())
         }
 }
+impl ScanRegionsRequest {
+pub fn new_() -> ScanRegionsRequest { ::std::default::Default::default() }
+#[inline] pub fn has_header(&self) -> bool { self.header.is_some() }
+#[inline] pub fn clear_header(&mut self) { self.header = ::std::option::Option::None }
+#[inline] pub fn set_header(&mut self, v: RequestHeader) { self.header = ::std::option::Option::Some(v); }
+#[inline] pub fn get_header(&self) -> &RequestHeader { match self.header.as_ref() {
+                            Some(v) => v,
+                            None => <RequestHeader as ::protobuf::Message>::default_instance(),
+                        } }
+#[inline] pub fn mut_header(&mut self) -> &mut RequestHeader { if self.header.is_none() {
+                                self.header = ::std::option::Option::Some(RequestHeader::default());
+                            }
+                            self.header.as_mut().unwrap() } 
+#[inline] pub fn take_header(&mut self) -> RequestHeader { self.header.take().unwrap_or_else(RequestHeader::default) }
+#[inline] pub fn clear_start_key(&mut self) { self.start_key.clear(); }
+#[inline] pub fn set_start_key(&mut self, v: std :: vec :: Vec < u8 >) { self.start_key = v; }
+#[inline] pub fn get_start_key(&self) -> &[u8] { &self.start_key }
+#[inline] pub fn mut_start_key(&mut self) -> &mut std :: vec :: Vec < u8 > { &mut self.start_key }
+#[inline] pub fn take_start_key(&mut self) -> std :: vec :: Vec < u8 > { ::std::mem::replace(&mut self.start_key, ::std::vec::Vec::new()) }
+#[inline] pub fn clear_limit(&mut self) { self.limit = 0 }
+#[inline] pub fn set_limit(&mut self, v: i32) { self.limit = v; }
+#[inline] pub fn get_limit(&self) -> i32 { self.limit }
+}
+impl ::protobuf::Clear for ScanRegionsRequest {fn clear(&mut self) { ::prost::Message::clear(self); }
+}
+impl ::protobuf::Message for ScanRegionsRequest {fn compute_size(&self) -> u32 { ::prost::Message::encoded_len(self) as u32 }
+fn get_cached_size(&self) -> u32 { ::prost::Message::encoded_len(self) as u32 }
+fn as_any(&self) -> &::std::any::Any { self as &::std::any::Any }
+fn descriptor(&self) -> &'static ::protobuf::reflect::MessageDescriptor { Self::descriptor_static() }
+fn new() -> Self { Self::new_() }
+fn write_to_with_cached_sizes(&self, _os: &mut ::protobuf::CodedOutputStream) -> ::protobuf::ProtobufResult<()> { unimplemented!(); }
+fn default_instance() -> &'static ScanRegionsRequest {
+            ::lazy_static::lazy_static! {
+                static ref INSTANCE: ScanRegionsRequest = ScanRegionsRequest::new_();
+            }
+            &*INSTANCE
+        }
+fn is_initialized(&self) -> bool { true }
+fn merge_from(&mut self, _is: &mut ::protobuf::CodedInputStream) -> ::protobuf::ProtobufResult<()> { unimplemented!(); }
+fn get_unknown_fields(&self) -> &::protobuf::UnknownFields { unimplemented!(); }
+fn mut_unknown_fields(&mut self) -> &mut ::protobuf::UnknownFields { unimplemented!(); }
+fn write_to_bytes(&self) -> ::protobuf::ProtobufResult<Vec<u8>> {
+            let mut buf = Vec::new();
+            if let Err(_) = ::prost::Message::encode(self, &mut buf) {
+                return Err(::protobuf::ProtobufError::WireError(::protobuf::error::WireError::Other));
+            }
+            Ok(buf)
+        }
+fn merge_from_bytes(&mut self, bytes: &[u8]) -> ::protobuf::ProtobufResult<()> {
+            if let Err(_) = ::prost::Message::merge(self, bytes) {
+                return Err(::protobuf::ProtobufError::WireError(::protobuf::error::WireError::Other));
+            }
+            Ok(())
+        }
+}
+impl ScanRegionsResponse {
+pub fn new_() -> ScanRegionsResponse { ::std::default::Default::default() }
+#[inline] pub fn has_header(&self) -> bool { self.header.is_some() }
+#[inline] pub fn clear_header(&mut self) { self.header = ::std::option::Option::None }
+#[inline] pub fn set_header(&mut self, v: ResponseHeader) { self.header = ::std::option::Option::Some(v); }
+#[inline] pub fn get_header(&self) -> &ResponseHeader { match self.header.as_ref() {
+                            Some(v) => v,
+                            None => <ResponseHeader as ::protobuf::Message>::default_instance(),
+                        } }
+#[inline] pub fn mut_header(&mut self) -> &mut ResponseHeader { if self.header.is_none() {
+                                self.header = ::std::option::Option::Some(ResponseHeader::default());
+                            }
+                            self.header.as_mut().unwrap() } 
+#[inline] pub fn take_header(&mut self) -> ResponseHeader { self.header.take().unwrap_or_else(ResponseHeader::default) }
+#[inline] pub fn clear_regions(&mut self) { self.regions.clear(); }
+#[inline] pub fn set_regions(&mut self, v: :: std :: vec :: Vec < super :: metapb :: Region >) { self.regions = v; }
+#[inline] pub fn get_regions(&self) -> &:: std :: vec :: Vec < super :: metapb :: Region > { &self.regions }
+#[inline] pub fn mut_regions(&mut self) -> &mut :: std :: vec :: Vec < super :: metapb :: Region > { &mut self.regions }
+#[inline] pub fn take_regions(&mut self) -> :: std :: vec :: Vec < super :: metapb :: Region > { ::std::mem::replace(&mut self.regions, ::std::vec::Vec::new()) }
+#[inline] pub fn clear_leaders(&mut self) { self.leaders.clear(); }
+#[inline] pub fn set_leaders(&mut self, v: :: std :: vec :: Vec < super :: metapb :: Peer >) { self.leaders = v; }
+#[inline] pub fn get_leaders(&self) -> &:: std :: vec :: Vec < super :: metapb :: Peer > { &self.leaders }
+#[inline] pub fn mut_leaders(&mut self) -> &mut :: std :: vec :: Vec < super :: metapb :: Peer > { &mut self.leaders }
+#[inline] pub fn take_leaders(&mut self) -> :: std :: vec :: Vec < super :: metapb :: Peer > { ::std::mem::replace(&mut self.leaders, ::std::vec::Vec::new()) }
+}
+impl ::protobuf::Clear for ScanRegionsResponse {fn clear(&mut self) { ::prost::Message::clear(self); }
+}
+impl ::protobuf::Message for ScanRegionsResponse {fn compute_size(&self) -> u32 { ::prost::Message::encoded_len(self) as u32 }
+fn get_cached_size(&self) -> u32 { ::prost::Message::encoded_len(self) as u32 }
+fn as_any(&self) -> &::std::any::Any { self as &::std::any::Any }
+fn descriptor(&self) -> &'static ::protobuf::reflect::MessageDescriptor { Self::descriptor_static() }
+fn new() -> Self { Self::new_() }
+fn write_to_with_cached_sizes(&self, _os: &mut ::protobuf::CodedOutputStream) -> ::protobuf::ProtobufResult<()> { unimplemented!(); }
+fn default_instance() -> &'static ScanRegionsResponse {
+            ::lazy_static::lazy_static! {
+                static ref INSTANCE: ScanRegionsResponse = ScanRegionsResponse::new_();
+            }
+            &*INSTANCE
+        }
+fn is_initialized(&self) -> bool { true }
+fn merge_from(&mut self, _is: &mut ::protobuf::CodedInputStream) -> ::protobuf::ProtobufResult<()> { unimplemented!(); }
+fn get_unknown_fields(&self) -> &::protobuf::UnknownFields { unimplemented!(); }
+fn mut_unknown_fields(&mut self) -> &mut ::protobuf::UnknownFields { unimplemented!(); }
+fn write_to_bytes(&self) -> ::protobuf::ProtobufResult<Vec<u8>> {
+            let mut buf = Vec::new();
+            if let Err(_) = ::prost::Message::encode(self, &mut buf) {
+                return Err(::protobuf::ProtobufError::WireError(::protobuf::error::WireError::Other));
+            }
+            Ok(buf)
+        }
+fn merge_from_bytes(&mut self, bytes: &[u8]) -> ::protobuf::ProtobufResult<()> {
+            if let Err(_) = ::prost::Message::merge(self, bytes) {
+                return Err(::protobuf::ProtobufError::WireError(::protobuf::error::WireError::Other));
+            }
+            Ok(())
+        }
+}
 impl GetClusterConfigRequest {
 pub fn new_() -> GetClusterConfigRequest { ::std::default::Default::default() }
 #[inline] pub fn has_header(&self) -> bool { self.header.is_some() }