diff --git a/_vendor/src/github.com/pingcap/kvproto/pkg/eraftpb/eraftpb.pb.go b/_vendor/src/github.com/pingcap/kvproto/pkg/eraftpb/eraftpb.pb.go
index 552a9050222..a312ad02eea 100644
--- a/_vendor/src/github.com/pingcap/kvproto/pkg/eraftpb/eraftpb.pb.go
+++ b/_vendor/src/github.com/pingcap/kvproto/pkg/eraftpb/eraftpb.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-gogo.
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
 // source: eraftpb.proto
-// DO NOT EDIT!
 
 /*
 	Package eraftpb is a generated protocol buffer package.
@@ -812,24 +811,6 @@ func (m *ConfChange) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
-func encodeFixed64Eraftpb(dAtA []byte, offset int, v uint64) int {
-	dAtA[offset] = uint8(v)
-	dAtA[offset+1] = uint8(v >> 8)
-	dAtA[offset+2] = uint8(v >> 16)
-	dAtA[offset+3] = uint8(v >> 24)
-	dAtA[offset+4] = uint8(v >> 32)
-	dAtA[offset+5] = uint8(v >> 40)
-	dAtA[offset+6] = uint8(v >> 48)
-	dAtA[offset+7] = uint8(v >> 56)
-	return offset + 8
-}
-func encodeFixed32Eraftpb(dAtA []byte, offset int, v uint32) int {
-	dAtA[offset] = uint8(v)
-	dAtA[offset+1] = uint8(v >> 8)
-	dAtA[offset+2] = uint8(v >> 16)
-	dAtA[offset+3] = uint8(v >> 24)
-	return offset + 4
-}
 func encodeVarintEraftpb(dAtA []byte, offset int, v uint64) int {
 	for v >= 1<<7 {
 		dAtA[offset] = uint8(v&0x7f | 0x80)
@@ -1852,7 +1833,24 @@ func (m *ConfState) Unmarshal(dAtA []byte) error {
 		}
 		switch fieldNum {
 		case 1:
-			if wireType == 2 {
+			if wireType == 0 {
+				var v uint64
+				for shift := uint(0); ; shift += 7 {
+					if shift >= 64 {
+						return ErrIntOverflowEraftpb
+					}
+					if iNdEx >= l {
+						return io.ErrUnexpectedEOF
+					}
+					b := dAtA[iNdEx]
+					iNdEx++
+					v |= (uint64(b) & 0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				m.Nodes = append(m.Nodes, v)
+			} else if wireType == 2 {
 				var packedLen int
 				for shift := uint(0); ; shift += 7 {
 					if shift >= 64 {
@@ -1893,7 +1891,11 @@ func (m *ConfState) Unmarshal(dAtA []byte) error {
 					}
 					m.Nodes = append(m.Nodes, v)
 				}
-			} else if wireType == 0 {
+			} else {
+				return fmt.Errorf("proto: wrong wireType = %d for field Nodes", wireType)
+			}
+		case 2:
+			if wireType == 0 {
 				var v uint64
 				for shift := uint(0); ; shift += 7 {
 					if shift >= 64 {
@@ -1909,12 +1911,8 @@ func (m *ConfState) Unmarshal(dAtA []byte) error {
 						break
 					}
 				}
-				m.Nodes = append(m.Nodes, v)
-			} else {
-				return fmt.Errorf("proto: wrong wireType = %d for field Nodes", wireType)
-			}
-		case 2:
-			if wireType == 2 {
+				m.Learners = append(m.Learners, v)
+			} else if wireType == 2 {
 				var packedLen int
 				for shift := uint(0); ; shift += 7 {
 					if shift >= 64 {
@@ -1955,23 +1953,6 @@ func (m *ConfState) Unmarshal(dAtA []byte) error {
 					}
 					m.Learners = append(m.Learners, v)
 				}
-			} else if wireType == 0 {
-				var v uint64
-				for shift := uint(0); ; shift += 7 {
-					if shift >= 64 {
-						return ErrIntOverflowEraftpb
-					}
-					if iNdEx >= l {
-						return io.ErrUnexpectedEOF
-					}
-					b := dAtA[iNdEx]
-					iNdEx++
-					v |= (uint64(b) & 0x7F) << shift
-					if b < 0x80 {
-						break
-					}
-				}
-				m.Learners = append(m.Learners, v)
 			} else {
 				return fmt.Errorf("proto: wrong wireType = %d for field Learners", wireType)
 			}
diff --git a/_vendor/src/github.com/pingcap/kvproto/pkg/metapb/metapb.pb.go b/_vendor/src/github.com/pingcap/kvproto/pkg/metapb/metapb.pb.go
index 3da13857558..62687c68721 100644
--- a/_vendor/src/github.com/pingcap/kvproto/pkg/metapb/metapb.pb.go
+++ b/_vendor/src/github.com/pingcap/kvproto/pkg/metapb/metapb.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-gogo.
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
 // source: metapb.proto
-// DO NOT EDIT!
 
 /*
 	Package metapb is a generated protocol buffer package.
@@ -477,24 +476,6 @@ func (m *Peer) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
-func encodeFixed64Metapb(dAtA []byte, offset int, v uint64) int {
-	dAtA[offset] = uint8(v)
-	dAtA[offset+1] = uint8(v >> 8)
-	dAtA[offset+2] = uint8(v >> 16)
-	dAtA[offset+3] = uint8(v >> 24)
-	dAtA[offset+4] = uint8(v >> 32)
-	dAtA[offset+5] = uint8(v >> 40)
-	dAtA[offset+6] = uint8(v >> 48)
-	dAtA[offset+7] = uint8(v >> 56)
-	return offset + 8
-}
-func encodeFixed32Metapb(dAtA []byte, offset int, v uint32) int {
-	dAtA[offset] = uint8(v)
-	dAtA[offset+1] = uint8(v >> 8)
-	dAtA[offset+2] = uint8(v >> 16)
-	dAtA[offset+3] = uint8(v >> 24)
-	return offset + 4
-}
 func encodeVarintMetapb(dAtA []byte, offset int, v uint64) int {
 	for v >= 1<<7 {
 		dAtA[offset] = uint8(v&0x7f | 0x80)
diff --git a/_vendor/src/github.com/pingcap/kvproto/pkg/pdpb/pdpb.pb.go b/_vendor/src/github.com/pingcap/kvproto/pkg/pdpb/pdpb.pb.go
index b64335a8380..7d51a66c15e 100644
--- a/_vendor/src/github.com/pingcap/kvproto/pkg/pdpb/pdpb.pb.go
+++ b/_vendor/src/github.com/pingcap/kvproto/pkg/pdpb/pdpb.pb.go
@@ -47,6 +47,8 @@
 		StoreStats
 		StoreHeartbeatRequest
 		StoreHeartbeatResponse
+		ScatterRegionRequest
+		ScatterRegionResponse
 */
 package pdpb
 
@@ -1232,6 +1234,64 @@ func (m *StoreHeartbeatResponse) GetHeader() *ResponseHeader {
 	return nil
 }
 
+type ScatterRegionRequest struct {
+	Header   *RequestHeader `protobuf:"bytes,1,opt,name=header" json:"header,omitempty"`
+	RegionId uint64         `protobuf:"varint,2,opt,name=region_id,json=regionId,proto3" json:"region_id,omitempty"`
+	// PD will use these region information if it can't find the region.
+	// For example, the region is just split and hasn't report to PD yet.
+	Region *metapb.Region `protobuf:"bytes,3,opt,name=region" json:"region,omitempty"`
+	Leader *metapb.Peer   `protobuf:"bytes,4,opt,name=leader" json:"leader,omitempty"`
+}
+
+func (m *ScatterRegionRequest) Reset()                    { *m = ScatterRegionRequest{} }
+func (m *ScatterRegionRequest) String() string            { return proto.CompactTextString(m) }
+func (*ScatterRegionRequest) ProtoMessage()               {}
+func (*ScatterRegionRequest) Descriptor() ([]byte, []int) { return fileDescriptorPdpb, []int{38} }
+
+func (m *ScatterRegionRequest) GetHeader() *RequestHeader {
+	if m != nil {
+		return m.Header
+	}
+	return nil
+}
+
+func (m *ScatterRegionRequest) GetRegionId() uint64 {
+	if m != nil {
+		return m.RegionId
+	}
+	return 0
+}
+
+func (m *ScatterRegionRequest) GetRegion() *metapb.Region {
+	if m != nil {
+		return m.Region
+	}
+	return nil
+}
+
+func (m *ScatterRegionRequest) GetLeader() *metapb.Peer {
+	if m != nil {
+		return m.Leader
+	}
+	return nil
+}
+
+type ScatterRegionResponse struct {
+	Header *ResponseHeader `protobuf:"bytes,1,opt,name=header" json:"header,omitempty"`
+}
+
+func (m *ScatterRegionResponse) Reset()                    { *m = ScatterRegionResponse{} }
+func (m *ScatterRegionResponse) String() string            { return proto.CompactTextString(m) }
+func (*ScatterRegionResponse) ProtoMessage()               {}
+func (*ScatterRegionResponse) Descriptor() ([]byte, []int) { return fileDescriptorPdpb, []int{39} }
+
+func (m *ScatterRegionResponse) GetHeader() *ResponseHeader {
+	if m != nil {
+		return m.Header
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*RequestHeader)(nil), "pdpb.RequestHeader")
 	proto.RegisterType((*ResponseHeader)(nil), "pdpb.ResponseHeader")
@@ -1271,6 +1331,8 @@ func init() {
 	proto.RegisterType((*StoreStats)(nil), "pdpb.StoreStats")
 	proto.RegisterType((*StoreHeartbeatRequest)(nil), "pdpb.StoreHeartbeatRequest")
 	proto.RegisterType((*StoreHeartbeatResponse)(nil), "pdpb.StoreHeartbeatResponse")
+	proto.RegisterType((*ScatterRegionRequest)(nil), "pdpb.ScatterRegionRequest")
+	proto.RegisterType((*ScatterRegionResponse)(nil), "pdpb.ScatterRegionResponse")
 	proto.RegisterEnum("pdpb.ErrorType", ErrorType_name, ErrorType_value)
 }
 
@@ -1302,6 +1364,7 @@ type PDClient interface {
 	ReportSplit(ctx context.Context, in *ReportSplitRequest, opts ...grpc.CallOption) (*ReportSplitResponse, error)
 	GetClusterConfig(ctx context.Context, in *GetClusterConfigRequest, opts ...grpc.CallOption) (*GetClusterConfigResponse, error)
 	PutClusterConfig(ctx context.Context, in *PutClusterConfigRequest, opts ...grpc.CallOption) (*PutClusterConfigResponse, error)
+	ScatterRegion(ctx context.Context, in *ScatterRegionRequest, opts ...grpc.CallOption) (*ScatterRegionResponse, error)
 }
 
 type pDClient struct {
@@ -1491,6 +1554,15 @@ func (c *pDClient) PutClusterConfig(ctx context.Context, in *PutClusterConfigReq
 	return out, nil
 }
 
+func (c *pDClient) ScatterRegion(ctx context.Context, in *ScatterRegionRequest, opts ...grpc.CallOption) (*ScatterRegionResponse, error) {
+	out := new(ScatterRegionResponse)
+	err := grpc.Invoke(ctx, "/pdpb.PD/ScatterRegion", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for PD service
 
 type PDServer interface {
@@ -1511,6 +1583,7 @@ type PDServer interface {
 	ReportSplit(context.Context, *ReportSplitRequest) (*ReportSplitResponse, error)
 	GetClusterConfig(context.Context, *GetClusterConfigRequest) (*GetClusterConfigResponse, error)
 	PutClusterConfig(context.Context, *PutClusterConfigRequest) (*PutClusterConfigResponse, error)
+	ScatterRegion(context.Context, *ScatterRegionRequest) (*ScatterRegionResponse, error)
 }
 
 func RegisterPDServer(s *grpc.Server, srv PDServer) {
@@ -1803,6 +1876,24 @@ func _PD_PutClusterConfig_Handler(srv interface{}, ctx context.Context, dec func
 	return interceptor(ctx, in, info, handler)
 }
 
+func _PD_ScatterRegion_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ScatterRegionRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(PDServer).ScatterRegion(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/pdpb.PD/ScatterRegion",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(PDServer).ScatterRegion(ctx, req.(*ScatterRegionRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _PD_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "pdpb.PD",
 	HandlerType: (*PDServer)(nil),
@@ -1859,6 +1950,10 @@ var _PD_serviceDesc = grpc.ServiceDesc{
 			MethodName: "PutClusterConfig",
 			Handler:    _PD_PutClusterConfig_Handler,
 		},
+		{
+			MethodName: "ScatterRegion",
+			Handler:    _PD_ScatterRegion_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
@@ -3377,6 +3472,87 @@ func (m *StoreHeartbeatResponse) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
+func (m *ScatterRegionRequest) 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 *ScatterRegionRequest) 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()))
+		n56, err := m.Header.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n56
+	}
+	if m.RegionId != 0 {
+		dAtA[i] = 0x10
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(m.RegionId))
+	}
+	if m.Region != nil {
+		dAtA[i] = 0x1a
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(m.Region.Size()))
+		n57, err := m.Region.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n57
+	}
+	if m.Leader != nil {
+		dAtA[i] = 0x22
+		i++
+		i = encodeVarintPdpb(dAtA, i, uint64(m.Leader.Size()))
+		n58, err := m.Leader.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n58
+	}
+	return i, nil
+}
+
+func (m *ScatterRegionResponse) 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 *ScatterRegionResponse) 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()))
+		n59, err := m.Header.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n59
+	}
+	return i, nil
+}
+
 func encodeFixed64Pdpb(dAtA []byte, offset int, v uint64) int {
 	dAtA[offset] = uint8(v)
 	dAtA[offset+1] = uint8(v >> 8)
@@ -3998,6 +4174,37 @@ func (m *StoreHeartbeatResponse) Size() (n int) {
 	return n
 }
 
+func (m *ScatterRegionRequest) Size() (n int) {
+	var l int
+	_ = l
+	if m.Header != nil {
+		l = m.Header.Size()
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	if m.RegionId != 0 {
+		n += 1 + sovPdpb(uint64(m.RegionId))
+	}
+	if m.Region != nil {
+		l = m.Region.Size()
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	if m.Leader != nil {
+		l = m.Leader.Size()
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	return n
+}
+
+func (m *ScatterRegionResponse) Size() (n int) {
+	var l int
+	_ = l
+	if m.Header != nil {
+		l = m.Header.Size()
+		n += 1 + l + sovPdpb(uint64(l))
+	}
+	return n
+}
+
 func sovPdpb(x uint64) (n int) {
 	for {
 		n++
@@ -8629,6 +8836,257 @@ func (m *StoreHeartbeatResponse) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *ScatterRegionRequest) 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: ScatterRegionRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ScatterRegionRequest: 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 != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RegionId", wireType)
+			}
+			m.RegionId = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPdpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.RegionId |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Region", 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.Region == nil {
+				m.Region = &metapb.Region{}
+			}
+			if err := m.Region.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Leader", 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.Leader == nil {
+				m.Leader = &metapb.Peer{}
+			}
+			if err := m.Leader.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
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *ScatterRegionResponse) 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: ScatterRegionResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ScatterRegionResponse: 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
+		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
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipPdpb(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0
@@ -8737,114 +9195,117 @@ var (
 func init() { proto.RegisterFile("pdpb.proto", fileDescriptorPdpb) }
 
 var fileDescriptorPdpb = []byte{
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diff --git a/glide.lock b/glide.lock
index f191b44dbcd..c755b49fb37 100644
--- a/glide.lock
+++ b/glide.lock
@@ -1,5 +1,5 @@
-hash: 95ae7782c331ed102d1bd2fbd8ecb19aea2c32362f22605d56d9f2f1c525336b
-updated: 2017-10-31T16:57:26.468540848+08:00
+hash: c30dd3b9fe4c73d814af571afffa3b9d207f1509e0d8cc19ba85c8e6f2db8447
+updated: 2017-12-25T17:52:14.579735981+08:00
 imports:
 - name: github.com/apache/thrift
   version: b2a4d4ae21c789b689dd162deb819665567f481c
@@ -132,7 +132,6 @@ imports:
   subpackages:
   - tags
   - tracing/opentracing
-  - util/metautils
 - name: github.com/grpc-ecosystem/go-grpc-prometheus
   version: 6b7015e65d366bf3f19b2b2a000a831940f0f7e0
 - name: github.com/grpc-ecosystem/grpc-gateway
@@ -161,7 +160,7 @@ imports:
 - name: github.com/pingcap/check
   version: ce8a2f822ab1e245a4eefcef2996531c79c943f1
 - name: github.com/pingcap/kvproto
-  version: e33073e1475021e04c795c3de5e1f4e28baa708a
+  version: eca6a87915b115e5d4a42ca0a573f3d51c0e62c4
   subpackages:
   - pkg/coprocessor
   - pkg/eraftpb
@@ -192,6 +191,8 @@ imports:
   version: abf152e5f3e97f2fafac028d2cc06c1feb87ffa5
 - name: github.com/Sirupsen/logrus
   version: ba1b36c82c5e05c4f912a88eab0dcd91a171688f
+- name: github.com/sirupsen/logrus
+  version: d682213848ed68c0a260ca37d6dd5ace8423f5ba
 - name: github.com/spf13/cobra
   version: 9495bc009a56819bdb0ddbc1a373e29c140bc674
   repo: https://github.com/spf13/cobra.git
@@ -212,10 +213,6 @@ imports:
   - thrift-gen/sampling
   - thrift-gen/zipkincore
   - utils
-- name: github.com/uber/jaeger-lib
-  version: 3b2a9ad2a045881ab7a0f81d465be54c8292ee4f
-  subpackages:
-  - metrics
 - name: github.com/ugorji/go
   version: b94837a2404ab90efe9289e77a70694c355739cb
   subpackages:
@@ -233,6 +230,7 @@ imports:
   subpackages:
   - bcrypt
   - blowfish
+  - ssh/terminal
 - name: golang.org/x/net
   version: d1e1b351919c6738fdeb9893d5c998b161464f0c
   repo: https://github.com/golang/net.git
@@ -281,7 +279,7 @@ imports:
   - tap
   - transport
 - name: gopkg.in/natefinch/lumberjack.v2
-  version: dd45e6a67c53f673bb49ca8a001fd3a63ceb640e
+  version: a96e63847dc3c67d17befa69c303767e2f84e54f
 - name: gopkg.in/yaml.v2
   version: cd8b52f8269e0feb286dfeef29f8fe4d5b397e0b
 testImports: []
diff --git a/glide.yaml b/glide.yaml
index 8d22a52a3aa..bcef051e079 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -114,7 +114,7 @@ import:
 - package: github.com/pingcap/check
   version: ce8a2f822ab1e245a4eefcef2996531c79c943f1
 - package: github.com/pingcap/kvproto
-  version: e33073e1475021e04c795c3de5e1f4e28baa708a
+  version: eca6a87915b115e5d4a42ca0a573f3d51c0e62c4
   subpackages:
   - pkg/coprocessor
   - pkg/eraftpb
diff --git a/server/coordinator.go b/server/coordinator.go
index cdd6b976f6b..ae48083f126 100644
--- a/server/coordinator.go
+++ b/server/coordinator.go
@@ -56,6 +56,7 @@ type coordinator struct {
 	cluster          *clusterInfo
 	limiter          *schedule.Limiter
 	replicaChecker   *schedule.ReplicaChecker
+	regionScatterer  *schedule.RegionScatterer
 	namespaceChecker *schedule.NamespaceChecker
 	operators        map[uint64]*schedule.Operator
 	schedulers       map[string]*scheduleController
@@ -72,6 +73,7 @@ func newCoordinator(cluster *clusterInfo, hbStreams *heartbeatStreams, classifie
 		cluster:          cluster,
 		limiter:          schedule.NewLimiter(),
 		replicaChecker:   schedule.NewReplicaChecker(cluster, classifier),
+		regionScatterer:  schedule.NewRegionScatterer(cluster, classifier),
 		namespaceChecker: schedule.NewNamespaceChecker(cluster, classifier),
 		operators:        make(map[uint64]*schedule.Operator),
 		schedulers:       make(map[string]*scheduleController),
diff --git a/server/grpc_service.go b/server/grpc_service.go
index e95667c474d..5e366db8740 100644
--- a/server/grpc_service.go
+++ b/server/grpc_service.go
@@ -461,6 +461,35 @@ func (s *Server) PutClusterConfig(ctx context.Context, request *pdpb.PutClusterC
 	}, nil
 }
 
+// ScatterRegion implements gRPC PDServer.
+func (s *Server) ScatterRegion(ctx context.Context, request *pdpb.ScatterRegionRequest) (*pdpb.ScatterRegionResponse, error) {
+	if err := s.validateRequest(request.GetHeader()); err != nil {
+		return nil, errors.Trace(err)
+	}
+
+	cluster := s.GetRaftCluster()
+	if cluster == nil {
+		return &pdpb.ScatterRegionResponse{Header: s.notBootstrappedHeader()}, nil
+	}
+
+	region := cluster.GetRegionInfoByID(request.GetRegionId())
+	if region == nil {
+		if request.GetRegion() == nil {
+			return nil, errors.Errorf("region %d not found", request.GetRegionId())
+		}
+		region = core.NewRegionInfo(request.GetRegion(), request.GetLeader())
+	}
+
+	co := cluster.coordinator
+	if op := co.regionScatterer.Scatter(region); op != nil {
+		co.addOperator(op)
+	}
+
+	return &pdpb.ScatterRegionResponse{
+		Header: s.header(),
+	}, nil
+}
+
 // validateRequest checks if Server is leader and clusterID is matched.
 // TODO: Call it in gRPC intercepter.
 func (s *Server) validateRequest(header *pdpb.RequestHeader) error {
diff --git a/server/schedule/region_scatterer.go b/server/schedule/region_scatterer.go
new file mode 100644
index 00000000000..2a0f31eb360
--- /dev/null
+++ b/server/schedule/region_scatterer.go
@@ -0,0 +1,177 @@
+// Copyright 2017 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package schedule
+
+import (
+	"math/rand"
+	"sync"
+
+	"github.com/pingcap/kvproto/pkg/metapb"
+	"github.com/pingcap/pd/server/core"
+	"github.com/pingcap/pd/server/namespace"
+)
+
+type selectedStores struct {
+	mu     sync.Mutex
+	stores map[uint64]struct{}
+}
+
+func newSelectedStores() *selectedStores {
+	return &selectedStores{
+		stores: make(map[uint64]struct{}),
+	}
+}
+
+func (s *selectedStores) put(id uint64) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if _, ok := s.stores[id]; ok {
+		return false
+	}
+	s.stores[id] = struct{}{}
+	return true
+}
+
+func (s *selectedStores) reset() {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.stores = make(map[uint64]struct{})
+}
+
+func (s *selectedStores) newFilter() Filter {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	cloned := make(map[uint64]struct{})
+	for id := range s.stores {
+		cloned[id] = struct{}{}
+	}
+	return NewExcludedFilter(nil, cloned)
+}
+
+// RegionScatterer scatters regions.
+type RegionScatterer struct {
+	cluster    Cluster
+	classifier namespace.Classifier
+	filters    []Filter
+	selected   *selectedStores
+}
+
+// NewRegionScatterer creates a region scatterer.
+func NewRegionScatterer(cluster Cluster, classifier namespace.Classifier) *RegionScatterer {
+	filters := []Filter{
+		NewStateFilter(),
+		NewHealthFilter(),
+		NewStorageThresholdFilter(),
+	}
+
+	return &RegionScatterer{
+		cluster:    cluster,
+		classifier: classifier,
+		filters:    filters,
+		selected:   newSelectedStores(),
+	}
+}
+
+// Scatter relocates the region.
+func (r *RegionScatterer) Scatter(region *core.RegionInfo) *Operator {
+	if r.cluster.IsRegionHot(region.GetId()) {
+		return nil
+	}
+
+	if len(region.GetPeers()) != r.cluster.GetMaxReplicas() {
+		return nil
+	}
+
+	return r.scatterRegion(region)
+}
+
+func (r *RegionScatterer) scatterRegion(region *core.RegionInfo) *Operator {
+	steps := make([]OperatorStep, 0, len(region.GetPeers()))
+
+	stores := r.collectAvailableStores(region)
+	for _, peer := range region.GetPeers() {
+		if len(stores) == 0 {
+			// Reset selected stores if we have no available stores.
+			r.selected.reset()
+			stores = r.collectAvailableStores(region)
+		}
+
+		if r.selected.put(peer.GetStoreId()) {
+			delete(stores, peer.GetStoreId())
+			continue
+		}
+		newPeer := r.selectPeerToReplace(stores, region, peer)
+		if newPeer == nil {
+			continue
+		}
+
+		// Remove it from stores and mark it as selected.
+		delete(stores, newPeer.GetStoreId())
+		r.selected.put(newPeer.GetStoreId())
+
+		op := CreateMovePeerOperator("scatter-peer", region, OpAdmin,
+			peer.GetStoreId(), newPeer.GetStoreId(), newPeer.GetId())
+		steps = append(steps, op.steps...)
+	}
+
+	if len(steps) == 0 {
+		return nil
+	}
+	return NewOperator("scatter-region", region.GetId(), OpAdmin, steps...)
+}
+
+func (r *RegionScatterer) selectPeerToReplace(stores map[uint64]*core.StoreInfo, region *core.RegionInfo, oldPeer *metapb.Peer) *metapb.Peer {
+	// scoreGuard guarantees that the distinct score will not decrease.
+	regionStores := r.cluster.GetRegionStores(region)
+	sourceStore := r.cluster.GetStore(oldPeer.GetStoreId())
+	scoreGuard := NewDistinctScoreFilter(r.cluster.GetLocationLabels(), regionStores, sourceStore)
+
+	candidates := make([]*core.StoreInfo, 0, len(stores))
+	for _, store := range stores {
+		if scoreGuard.FilterTarget(r.cluster, store) {
+			continue
+		}
+		candidates = append(candidates, store)
+	}
+
+	if len(candidates) == 0 {
+		return nil
+	}
+
+	target := candidates[rand.Intn(len(candidates))]
+	newPeer, err := r.cluster.AllocPeer(target.GetId())
+	if err != nil {
+		return nil
+	}
+	return newPeer
+}
+
+func (r *RegionScatterer) collectAvailableStores(region *core.RegionInfo) map[uint64]*core.StoreInfo {
+	namespace := r.classifier.GetRegionNamespace(region)
+	filters := []Filter{
+		r.selected.newFilter(),
+		NewExcludedFilter(nil, region.GetStoreIds()),
+		NewNamespaceFilter(r.classifier, namespace),
+	}
+	filters = append(filters, r.filters...)
+
+	stores := r.cluster.GetStores()
+	targets := make(map[uint64]*core.StoreInfo, len(stores))
+	for _, store := range stores {
+		if !FilterTarget(r.cluster, store, filters) {
+			targets[store.GetId()] = store
+		}
+	}
+	return targets
+}
diff --git a/server/schedulers/mockcluster.go b/server/schedulers/mockcluster.go
index 472391135a3..4e00beb4f42 100644
--- a/server/schedulers/mockcluster.go
+++ b/server/schedulers/mockcluster.go
@@ -235,6 +235,35 @@ func (mc *mockCluster) newMockRegionInfo(regionID uint64, leaderID uint64, follo
 	return core.NewRegionInfo(region, leader)
 }
 
+func (mc *mockCluster) applyOperator(op *schedule.Operator) {
+	region := mc.GetRegion(op.RegionID())
+	for !op.IsFinish() {
+		if step := op.Check(region); step != nil {
+			switch s := step.(type) {
+			case schedule.TransferLeader:
+				region.Leader = region.GetStorePeer(s.ToStore)
+			case schedule.AddPeer:
+				if region.GetStorePeer(s.ToStore) != nil {
+					panic("Add peer that exists")
+				}
+				peer := &metapb.Peer{
+					Id:      s.PeerID,
+					StoreId: s.ToStore,
+				}
+				region.Peers = append(region.Peers, peer)
+			case schedule.RemovePeer:
+				if region.GetStorePeer(s.FromStore) == nil {
+					panic("Remove peer that doesn't exist")
+				}
+				region.RemoveStorePeer(s.FromStore)
+			default:
+				panic("Unknown operator step")
+			}
+		}
+	}
+	mc.PutRegion(region)
+}
+
 func (mc *mockCluster) GetOpt() schedule.NamespaceOptions {
 	return mc.MockSchedulerOptions
 }
diff --git a/server/schedulers/scheduler_test.go b/server/schedulers/scheduler_test.go
index 3ee05f45746..f3fb2dcde17 100644
--- a/server/schedulers/scheduler_test.go
+++ b/server/schedulers/scheduler_test.go
@@ -15,7 +15,9 @@ package schedulers
 
 import (
 	. "github.com/pingcap/check"
+	"github.com/pingcap/pd/server/namespace"
 	"github.com/pingcap/pd/server/schedule"
+	log "github.com/sirupsen/logrus"
 )
 
 var _ = Suite(&testShuffleLeaderSuite{})
@@ -110,3 +112,74 @@ func (s *testBalanceAdjacentRegionSuite) TestBalance(c *C) {
 		c.Assert(sc.Schedule(tc, schedule.NewOpInfluence(nil, tc)), IsNil)
 	}
 }
+
+type sequencer struct {
+	maxID uint64
+	curID uint64
+}
+
+func newSequencer(maxID uint64) *sequencer {
+	return &sequencer{
+		maxID: maxID,
+		curID: 0,
+	}
+}
+
+func (s *sequencer) next() uint64 {
+	s.curID++
+	if s.curID > s.maxID {
+		s.curID = 1
+	}
+	return s.curID
+}
+
+var _ = Suite(&testScatterRegionSuite{})
+
+type testScatterRegionSuite struct{}
+
+func (s *testScatterRegionSuite) TestSixStores(c *C) {
+	s.scatter(c, 6, 4)
+}
+
+func (s *testScatterRegionSuite) TestFiveStores(c *C) {
+	s.scatter(c, 5, 5)
+}
+
+func (s *testScatterRegionSuite) scatter(c *C, numStores, numRegions uint64) {
+	opt := newTestScheduleConfig()
+	tc := newMockCluster(opt)
+
+	// Add stores 1~6.
+	for i := uint64(1); i <= numStores; i++ {
+		tc.addRegionStore(i, 0)
+	}
+
+	// Add regions 1~4.
+	seq := newSequencer(numStores)
+	for i := uint64(1); i <= numRegions; i++ {
+		tc.addLeaderRegion(i, seq.next(), seq.next(), seq.next())
+	}
+
+	scatterer := schedule.NewRegionScatterer(tc, namespace.DefaultClassifier)
+
+	for i := uint64(1); i <= numRegions; i++ {
+		region := tc.GetRegion(i)
+		if op := scatterer.Scatter(region); op != nil {
+			log.Info(op)
+			tc.applyOperator(op)
+		}
+	}
+
+	countPeers := make(map[uint64]uint64)
+	for i := uint64(1); i <= numRegions; i++ {
+		region := tc.GetRegion(i)
+		for _, peer := range region.GetPeers() {
+			countPeers[peer.GetStoreId()]++
+		}
+	}
+
+	// Each store should have the same number of peers.
+	for _, count := range countPeers {
+		c.Assert(count, Equals, numRegions*3/numStores)
+	}
+}