diff --git a/Documentation/dev-guide/api_reference_v3.md b/Documentation/dev-guide/api_reference_v3.md
index 62a5227ac..ca5fd3994 100644
--- a/Documentation/dev-guide/api_reference_v3.md
+++ b/Documentation/dev-guide/api_reference_v3.md
@@ -12,13 +12,13 @@
 | UserGet | AuthUserGetRequest | AuthUserGetResponse | UserGet gets detailed user information or lists all users. |
 | UserDelete | AuthUserDeleteRequest | AuthUserDeleteResponse | UserDelete deletes a specified user. |
 | UserChangePassword | AuthUserChangePasswordRequest | AuthUserChangePasswordResponse | UserChangePassword changes the password of a specified user. |
-| UserGrant | AuthUserGrantRequest | AuthUserGrantResponse | UserGrant grants a role to a specified user. |
-| UserRevoke | AuthUserRevokeRequest | AuthUserRevokeResponse | UserRevoke revokes a role of specified user. |
+| UserGrantRole | AuthUserGrantRoleRequest | AuthUserGrantRoleResponse | UserGrant grants a role to a specified user. |
+| UserRevokeRole | AuthUserRevokeRoleRequest | AuthUserRevokeRoleResponse | UserRevokeRole revokes a role of specified user. |
 | RoleAdd | AuthRoleAddRequest | AuthRoleAddResponse | RoleAdd adds a new role. |
 | RoleGet | AuthRoleGetRequest | AuthRoleGetResponse | RoleGet gets detailed role information or lists all roles. |
 | RoleDelete | AuthRoleDeleteRequest | AuthRoleDeleteResponse | RoleDelete deletes a specified role. |
-| RoleGrant | AuthRoleGrantRequest | AuthRoleGrantResponse | RoleGrant grants a permission of a specified key or range to a specified role. |
-| RoleRevoke | AuthRoleRevokeRequest | AuthRoleRevokeResponse | RoleRevoke revokes a key or range permission of a specified role. |
+| RoleGrantPermission | AuthRoleGrantPermissionRequest | AuthRoleGrantPermissionResponse | RoleGrantPermission grants a permission of a specified key or range to a specified role. |
+| RoleRevokePermission | AuthRoleRevokePermissionRequest | AuthRoleRevokePermissionResponse | RoleRevokePermission revokes a key or range permission of a specified role. |
 
 
 
@@ -149,7 +149,9 @@ Empty field.
 
 ##### message `AuthRoleDeleteRequest` (etcdserver/etcdserverpb/rpc.proto)
 
-Empty field.
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| role |  | string |
 
 
 
@@ -163,7 +165,9 @@ Empty field.
 
 ##### message `AuthRoleGetRequest` (etcdserver/etcdserverpb/rpc.proto)
 
-Empty field.
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| role |  | string |
 
 
 
@@ -172,10 +176,11 @@ Empty field.
 | Field | Description | Type |
 | ----- | ----------- | ---- |
 | header |  | ResponseHeader |
+| perm |  | (slice of) authpb.Permission |
 
 
 
-##### message `AuthRoleGrantRequest` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthRoleGrantPermissionRequest` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -184,7 +189,7 @@ Empty field.
 
 
 
-##### message `AuthRoleGrantResponse` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthRoleGrantPermissionResponse` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -192,13 +197,16 @@ Empty field.
 
 
 
-##### message `AuthRoleRevokeRequest` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthRoleRevokePermissionRequest` (etcdserver/etcdserverpb/rpc.proto)
 
-Empty field.
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| role |  | string |
+| key |  | string |
 
 
 
-##### message `AuthRoleRevokeResponse` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthRoleRevokePermissionResponse` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -258,7 +266,9 @@ Empty field.
 
 ##### message `AuthUserGetRequest` (etcdserver/etcdserverpb/rpc.proto)
 
-Empty field.
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| name |  | string |
 
 
 
@@ -267,10 +277,11 @@ Empty field.
 | Field | Description | Type |
 | ----- | ----------- | ---- |
 | header |  | ResponseHeader |
+| roles |  | (slice of) string |
 
 
 
-##### message `AuthUserGrantRequest` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthUserGrantRoleRequest` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -279,7 +290,7 @@ Empty field.
 
 
 
-##### message `AuthUserGrantResponse` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthUserGrantRoleResponse` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -287,13 +298,16 @@ Empty field.
 
 
 
-##### message `AuthUserRevokeRequest` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthUserRevokeRoleRequest` (etcdserver/etcdserverpb/rpc.proto)
 
-Empty field.
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| name |  | string |
+| role |  | string |
 
 
 
-##### message `AuthUserRevokeResponse` (etcdserver/etcdserverpb/rpc.proto)
+##### message `AuthUserRevokeRoleResponse` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -572,7 +586,7 @@ Empty field.
 
 
 
-##### message `RequestUnion` (etcdserver/etcdserverpb/rpc.proto)
+##### message `RequestOp` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -594,7 +608,7 @@ Empty field.
 
 
 
-##### message `ResponseUnion` (etcdserver/etcdserverpb/rpc.proto)
+##### message `ResponseOp` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
 | ----- | ----------- | ---- |
@@ -647,8 +661,8 @@ From google paxosdb paper: Our implementation hinges around a powerful primitive
 | Field | Description | Type |
 | ----- | ----------- | ---- |
 | compare | compare is a list of predicates representing a conjunction of terms. If the comparisons succeed, then the success requests will be processed in order, and the response will contain their respective responses in order. If the comparisons fail, then the failure requests will be processed in order, and the response will contain their respective responses in order. | (slice of) Compare |
-| success | success is a list of requests which will be applied when compare evaluates to true. | (slice of) RequestUnion |
-| failure | failure is a list of requests which will be applied when compare evaluates to false. | (slice of) RequestUnion |
+| success | success is a list of requests which will be applied when compare evaluates to true. | (slice of) RequestOp |
+| failure | failure is a list of requests which will be applied when compare evaluates to false. | (slice of) RequestOp |
 
 
 
@@ -658,7 +672,7 @@ From google paxosdb paper: Our implementation hinges around a powerful primitive
 | ----- | ----------- | ---- |
 | header |  | ResponseHeader |
 | succeeded | succeeded is set to true if the compare evaluated to true or false otherwise. | bool |
-| responses | responses is a list of responses corresponding to the results from applying success if succeeded is true or failure if succeeded is false. | (slice of) ResponseUnion |
+| responses | responses is a list of responses corresponding to the results from applying success if succeeded is true or failure if succeeded is false. | (slice of) ResponseOp |
 
 
 
diff --git a/auth/authpb/auth.pb.go b/auth/authpb/auth.pb.go
index 7d4010401..00a63e464 100644
--- a/auth/authpb/auth.pb.go
+++ b/auth/authpb/auth.pb.go
@@ -756,7 +756,7 @@ var (
 )
 
 var fileDescriptorAuth = []byte{
-	// 254 bytes of a gzipped FileDescriptorProto
+	// 265 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0x4a, 0x2c, 0x2d, 0xc9,
 	0xd0, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x03, 0xb1, 0x0b, 0x92, 0xa4, 0x44, 0xd2, 0xf3,
 	0xd3, 0xf3, 0xc1, 0x42, 0xfa, 0x20, 0x16, 0x44, 0x56, 0xc9, 0x87, 0x8b, 0x25, 0xb4, 0x38, 0xb5,
@@ -764,13 +764,14 @@ var fileDescriptorAuth = []byte{
 	0xcc, 0x16, 0x92, 0xe2, 0xe2, 0x28, 0x48, 0x2c, 0x2e, 0x2e, 0xcf, 0x2f, 0x4a, 0x91, 0x60, 0x02,
 	0x8b, 0xc3, 0xf9, 0x42, 0x22, 0x5c, 0xac, 0x45, 0xf9, 0x39, 0xa9, 0xc5, 0x12, 0xcc, 0x0a, 0xcc,
 	0x1a, 0x9c, 0x41, 0x10, 0x8e, 0x52, 0x3d, 0x17, 0x57, 0x40, 0x6a, 0x51, 0x6e, 0x66, 0x71, 0x71,
-	0x66, 0x7e, 0x9e, 0x90, 0x00, 0x17, 0x73, 0x76, 0x6a, 0x25, 0xd4, 0x48, 0x10, 0x53, 0xc8, 0x18,
-	0x68, 0x22, 0x50, 0x3e, 0xa4, 0xb2, 0x20, 0x15, 0x6c, 0x22, 0x9f, 0x91, 0xb8, 0x1e, 0xc4, 0x79,
-	0x7a, 0x08, 0x7d, 0x7a, 0x20, 0xe9, 0x20, 0xb8, 0x42, 0x25, 0x2d, 0x2e, 0x16, 0x10, 0x2d, 0xc4,
-	0xc1, 0xc5, 0x12, 0xe4, 0xea, 0xe8, 0x22, 0xc0, 0x20, 0xc4, 0xc9, 0xc5, 0x1a, 0x1e, 0xe4, 0x19,
-	0xe2, 0x2a, 0xc0, 0x28, 0xc4, 0xcb, 0xc5, 0x09, 0x12, 0x84, 0x70, 0x99, 0x94, 0x42, 0x80, 0x6a,
-	0x80, 0x2e, 0xc1, 0xea, 0x1d, 0x0b, 0x2e, 0x5e, 0xa0, 0x1b, 0x10, 0xf6, 0x00, 0x5d, 0xc0, 0xac,
-	0xc1, 0x6d, 0x24, 0x84, 0xe9, 0x82, 0x20, 0x54, 0x85, 0x4e, 0x22, 0x27, 0x1e, 0xca, 0x31, 0x5c,
-	0x00, 0xe2, 0x13, 0x8f, 0xe4, 0x18, 0x2f, 0x00, 0xf1, 0x03, 0x20, 0x4e, 0x62, 0x03, 0x87, 0xa0,
-	0x31, 0x20, 0x00, 0x00, 0xff, 0xff, 0x92, 0x06, 0xa1, 0xed, 0x6d, 0x01, 0x00, 0x00,
+	0x66, 0x7e, 0x9e, 0x90, 0x00, 0x17, 0x73, 0x76, 0x6a, 0x25, 0xd4, 0x48, 0x10, 0x53, 0xc8, 0x98,
+	0x8b, 0xa3, 0x20, 0xb5, 0x28, 0x37, 0xa4, 0xb2, 0x20, 0x15, 0x6c, 0x22, 0x9f, 0x91, 0xb8, 0x1e,
+	0xc4, 0x79, 0x7a, 0x08, 0x7d, 0x7a, 0x20, 0xe9, 0x20, 0xb8, 0x42, 0x25, 0x2d, 0x2e, 0x16, 0x10,
+	0x2d, 0xc4, 0xc1, 0xc5, 0x12, 0xe4, 0xea, 0xe8, 0x22, 0xc0, 0x20, 0xc4, 0xc9, 0xc5, 0x1a, 0x1e,
+	0xe4, 0x19, 0xe2, 0x2a, 0xc0, 0x28, 0xc4, 0xcb, 0xc5, 0x09, 0x12, 0x84, 0x70, 0x99, 0x94, 0x42,
+	0xb8, 0x58, 0x82, 0xf2, 0x73, 0x52, 0xb1, 0x7a, 0xc7, 0x82, 0x8b, 0x37, 0x3b, 0xb5, 0x12, 0x61,
+	0x8f, 0x04, 0x93, 0x02, 0xb3, 0x06, 0xb7, 0x91, 0x10, 0xa6, 0x0b, 0x82, 0x50, 0x15, 0x3a, 0x89,
+	0x9c, 0x78, 0x28, 0xc7, 0x70, 0xe1, 0xa1, 0x1c, 0xc3, 0x89, 0x47, 0x72, 0x8c, 0x17, 0x1e, 0xc9,
+	0x31, 0x3e, 0x78, 0x24, 0xc7, 0x98, 0xc4, 0x06, 0x0e, 0x41, 0x63, 0x40, 0x00, 0x00, 0x00, 0xff,
+	0xff, 0x92, 0x06, 0xa1, 0xed, 0x6d, 0x01, 0x00, 0x00,
 }
diff --git a/clientv3/op.go b/clientv3/op.go
index 2b8c1d87a..616e68abd 100644
--- a/clientv3/op.go
+++ b/clientv3/op.go
@@ -53,7 +53,7 @@ type Op struct {
 	leaseID LeaseID
 }
 
-func (op Op) toRequestUnion() *pb.RequestUnion {
+func (op Op) toRequestOp() *pb.RequestOp {
 	switch op.t {
 	case tRange:
 		r := &pb.RangeRequest{Key: op.key, RangeEnd: op.end, Limit: op.limit, Revision: op.rev, Serializable: op.serializable}
@@ -61,13 +61,13 @@ func (op Op) toRequestUnion() *pb.RequestUnion {
 			r.SortOrder = pb.RangeRequest_SortOrder(op.sort.Order)
 			r.SortTarget = pb.RangeRequest_SortTarget(op.sort.Target)
 		}
-		return &pb.RequestUnion{Request: &pb.RequestUnion_RequestRange{RequestRange: r}}
+		return &pb.RequestOp{Request: &pb.RequestOp_RequestRange{RequestRange: r}}
 	case tPut:
 		r := &pb.PutRequest{Key: op.key, Value: op.val, Lease: int64(op.leaseID)}
-		return &pb.RequestUnion{Request: &pb.RequestUnion_RequestPut{RequestPut: r}}
+		return &pb.RequestOp{Request: &pb.RequestOp_RequestPut{RequestPut: r}}
 	case tDeleteRange:
 		r := &pb.DeleteRangeRequest{Key: op.key, RangeEnd: op.end}
-		return &pb.RequestUnion{Request: &pb.RequestUnion_RequestDeleteRange{RequestDeleteRange: r}}
+		return &pb.RequestOp{Request: &pb.RequestOp_RequestDeleteRange{RequestDeleteRange: r}}
 	default:
 		panic("Unknown Op")
 	}
diff --git a/clientv3/txn.go b/clientv3/txn.go
index d08a46eb8..77e7642ca 100644
--- a/clientv3/txn.go
+++ b/clientv3/txn.go
@@ -66,8 +66,8 @@ type txn struct {
 
 	cmps []*pb.Compare
 
-	sus []*pb.RequestUnion
-	fas []*pb.RequestUnion
+	sus []*pb.RequestOp
+	fas []*pb.RequestOp
 }
 
 func (txn *txn) If(cs ...Cmp) Txn {
@@ -110,7 +110,7 @@ func (txn *txn) Then(ops ...Op) Txn {
 
 	for _, op := range ops {
 		txn.isWrite = txn.isWrite || op.isWrite()
-		txn.sus = append(txn.sus, op.toRequestUnion())
+		txn.sus = append(txn.sus, op.toRequestOp())
 	}
 
 	return txn
@@ -128,7 +128,7 @@ func (txn *txn) Else(ops ...Op) Txn {
 
 	for _, op := range ops {
 		txn.isWrite = txn.isWrite || op.isWrite()
-		txn.fas = append(txn.fas, op.toRequestUnion())
+		txn.fas = append(txn.fas, op.toRequestOp())
 	}
 
 	return txn
diff --git a/etcdctl/ctlv3/command/printer.go b/etcdctl/ctlv3/command/printer.go
index 17b3aea9f..e69deecc3 100644
--- a/etcdctl/ctlv3/command/printer.go
+++ b/etcdctl/ctlv3/command/printer.go
@@ -128,11 +128,11 @@ func (s *simplePrinter) Txn(resp v3.TxnResponse) {
 	for _, r := range resp.Responses {
 		fmt.Println("")
 		switch v := r.Response.(type) {
-		case *pb.ResponseUnion_ResponseDeleteRange:
+		case *pb.ResponseOp_ResponseDeleteRange:
 			s.Del((v3.DeleteResponse)(*v.ResponseDeleteRange))
-		case *pb.ResponseUnion_ResponsePut:
+		case *pb.ResponseOp_ResponsePut:
 			s.Put((v3.PutResponse)(*v.ResponsePut))
-		case *pb.ResponseUnion_ResponseRange:
+		case *pb.ResponseOp_ResponseRange:
 			s.Get(((v3.GetResponse)(*v.ResponseRange)))
 		default:
 			fmt.Printf("unexpected response %+v\n", r)
diff --git a/etcdserver/api/v3rpc/key.go b/etcdserver/api/v3rpc/key.go
index 716e19e1a..94875ff2b 100644
--- a/etcdserver/api/v3rpc/key.go
+++ b/etcdserver/api/v3rpc/key.go
@@ -156,7 +156,7 @@ func checkTxnRequest(r *pb.TxnRequest) error {
 	}
 
 	for _, u := range r.Success {
-		if err := checkRequestUnion(u); err != nil {
+		if err := checkRequestOp(u); err != nil {
 			return err
 		}
 	}
@@ -165,7 +165,7 @@ func checkTxnRequest(r *pb.TxnRequest) error {
 	}
 
 	for _, u := range r.Failure {
-		if err := checkRequestUnion(u); err != nil {
+		if err := checkRequestOp(u); err != nil {
 			return err
 		}
 	}
@@ -173,11 +173,11 @@ func checkTxnRequest(r *pb.TxnRequest) error {
 }
 
 // checkRequestDupKeys gives rpctypes.ErrGRPCDuplicateKey if the same key is modified twice
-func checkRequestDupKeys(reqs []*pb.RequestUnion) error {
+func checkRequestDupKeys(reqs []*pb.RequestOp) error {
 	// check put overlap
 	keys := make(map[string]struct{})
 	for _, requ := range reqs {
-		tv, ok := requ.Request.(*pb.RequestUnion_RequestPut)
+		tv, ok := requ.Request.(*pb.RequestOp_RequestPut)
 		if !ok {
 			continue
 		}
@@ -205,7 +205,7 @@ func checkRequestDupKeys(reqs []*pb.RequestUnion) error {
 
 	// check put overlap with deletes
 	for _, requ := range reqs {
-		tv, ok := requ.Request.(*pb.RequestUnion_RequestDeleteRange)
+		tv, ok := requ.Request.(*pb.RequestOp_RequestDeleteRange)
 		if !ok {
 			continue
 		}
@@ -230,23 +230,23 @@ func checkRequestDupKeys(reqs []*pb.RequestUnion) error {
 	return nil
 }
 
-func checkRequestUnion(u *pb.RequestUnion) error {
+func checkRequestOp(u *pb.RequestOp) error {
 	// TODO: ensure only one of the field is set.
 	switch uv := u.Request.(type) {
-	case *pb.RequestUnion_RequestRange:
+	case *pb.RequestOp_RequestRange:
 		if uv.RequestRange != nil {
 			return checkRangeRequest(uv.RequestRange)
 		}
-	case *pb.RequestUnion_RequestPut:
+	case *pb.RequestOp_RequestPut:
 		if uv.RequestPut != nil {
 			return checkPutRequest(uv.RequestPut)
 		}
-	case *pb.RequestUnion_RequestDeleteRange:
+	case *pb.RequestOp_RequestDeleteRange:
 		if uv.RequestDeleteRange != nil {
 			return checkDeleteRequest(uv.RequestDeleteRange)
 		}
 	default:
-		// empty union
+		// empty op
 		return nil
 	}
 	return nil
diff --git a/etcdserver/apply.go b/etcdserver/apply.go
index 8006f0066..8a3742a31 100644
--- a/etcdserver/apply.go
+++ b/etcdserver/apply.go
@@ -269,7 +269,7 @@ func (a *applierV3backend) Txn(rt *pb.TxnRequest) (*pb.TxnResponse, error) {
 		}
 	}
 
-	var reqs []*pb.RequestUnion
+	var reqs []*pb.RequestOp
 	if ok {
 		reqs = rt.Success
 	} else {
@@ -295,7 +295,7 @@ func (a *applierV3backend) Txn(rt *pb.TxnRequest) (*pb.TxnResponse, error) {
 		}
 	}()
 
-	resps := make([]*pb.ResponseUnion, len(reqs))
+	resps := make([]*pb.ResponseOp, len(reqs))
 	changedKV := false
 	for i := range reqs {
 		if reqs[i].GetRequestRange() == nil {
@@ -384,31 +384,31 @@ func (a *applierV3backend) applyCompare(c *pb.Compare) (int64, bool) {
 	return rev, true
 }
 
-func (a *applierV3backend) applyUnion(txnID int64, union *pb.RequestUnion) *pb.ResponseUnion {
+func (a *applierV3backend) applyUnion(txnID int64, union *pb.RequestOp) *pb.ResponseOp {
 	switch tv := union.Request.(type) {
-	case *pb.RequestUnion_RequestRange:
+	case *pb.RequestOp_RequestRange:
 		if tv.RequestRange != nil {
 			resp, err := a.Range(txnID, tv.RequestRange)
 			if err != nil {
 				panic("unexpected error during txn")
 			}
-			return &pb.ResponseUnion{Response: &pb.ResponseUnion_ResponseRange{ResponseRange: resp}}
+			return &pb.ResponseOp{Response: &pb.ResponseOp_ResponseRange{ResponseRange: resp}}
 		}
-	case *pb.RequestUnion_RequestPut:
+	case *pb.RequestOp_RequestPut:
 		if tv.RequestPut != nil {
 			resp, err := a.Put(txnID, tv.RequestPut)
 			if err != nil {
 				panic("unexpected error during txn")
 			}
-			return &pb.ResponseUnion{Response: &pb.ResponseUnion_ResponsePut{ResponsePut: resp}}
+			return &pb.ResponseOp{Response: &pb.ResponseOp_ResponsePut{ResponsePut: resp}}
 		}
-	case *pb.RequestUnion_RequestDeleteRange:
+	case *pb.RequestOp_RequestDeleteRange:
 		if tv.RequestDeleteRange != nil {
 			resp, err := a.DeleteRange(txnID, tv.RequestDeleteRange)
 			if err != nil {
 				panic("unexpected error during txn")
 			}
-			return &pb.ResponseUnion{Response: &pb.ResponseUnion_ResponseDeleteRange{ResponseDeleteRange: resp}}
+			return &pb.ResponseOp{Response: &pb.ResponseOp_ResponseDeleteRange{ResponseDeleteRange: resp}}
 		}
 	default:
 		// empty union
@@ -653,9 +653,9 @@ func (s *kvSortByValue) Less(i, j int) bool {
 	return bytes.Compare(s.kvs[i].Value, s.kvs[j].Value) < 0
 }
 
-func (a *applierV3backend) checkRequestLeases(reqs []*pb.RequestUnion) error {
+func (a *applierV3backend) checkRequestLeases(reqs []*pb.RequestOp) error {
 	for _, requ := range reqs {
-		tv, ok := requ.Request.(*pb.RequestUnion_RequestPut)
+		tv, ok := requ.Request.(*pb.RequestOp_RequestPut)
 		if !ok {
 			continue
 		}
@@ -670,9 +670,9 @@ func (a *applierV3backend) checkRequestLeases(reqs []*pb.RequestUnion) error {
 	return nil
 }
 
-func (a *applierV3backend) checkRequestRange(reqs []*pb.RequestUnion) error {
+func (a *applierV3backend) checkRequestRange(reqs []*pb.RequestOp) error {
 	for _, requ := range reqs {
-		tv, ok := requ.Request.(*pb.RequestUnion_RequestRange)
+		tv, ok := requ.Request.(*pb.RequestOp_RequestRange)
 		if !ok {
 			continue
 		}
diff --git a/etcdserver/etcdserverpb/etcdserver.pb.go b/etcdserver/etcdserverpb/etcdserver.pb.go
index 869fdc29c..cd0cf1833 100644
--- a/etcdserver/etcdserverpb/etcdserver.pb.go
+++ b/etcdserver/etcdserverpb/etcdserver.pb.go
@@ -23,8 +23,8 @@
 		PutResponse
 		DeleteRangeRequest
 		DeleteRangeResponse
-		RequestUnion
-		ResponseUnion
+		RequestOp
+		ResponseOp
 		Compare
 		TxnRequest
 		TxnResponse
@@ -1006,30 +1006,30 @@ var (
 )
 
 var fileDescriptorEtcdserver = []byte{
-	// 388 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x5c, 0x92, 0xd1, 0xee, 0xd2, 0x30,
-	0x14, 0xc6, 0xff, 0xdb, 0xca, 0x60, 0x15, 0x15, 0x1b, 0x62, 0x4e, 0x88, 0x41, 0x43, 0xbc, 0xf0,
-	0x4a, 0xdf, 0x01, 0xe1, 0x82, 0x44, 0x0d, 0x82, 0xd1, 0xeb, 0xba, 0x1d, 0xa1, 0x09, 0x5b, 0x47,
-	0xdb, 0x4d, 0xde, 0xc0, 0x57, 0xe3, 0xd2, 0x27, 0x30, 0xea, 0x93, 0xd8, 0x16, 0x86, 0xd5, 0x8b,
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diff --git a/etcdserver/etcdserverpb/raft_internal.pb.go b/etcdserver/etcdserverpb/raft_internal.pb.go
index 873c7dc03..5d6016160 100644
--- a/etcdserver/etcdserverpb/raft_internal.pb.go
+++ b/etcdserver/etcdserverpb/raft_internal.pb.go
@@ -1697,51 +1697,51 @@ var (
 )
 
 var fileDescriptorRaftInternal = []byte{
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+	0xb3, 0x44, 0x38, 0x52, 0x60, 0x76, 0xf6, 0xd3, 0x98, 0xb0, 0x85, 0xfa, 0x94, 0x75, 0x09, 0xb2,
+	0xd9, 0x52, 0x17, 0x29, 0x63, 0x8b, 0x14, 0xe2, 0x2d, 0x34, 0xdd, 0x96, 0xb7, 0x89, 0x78, 0xb2,
+	0x64, 0xc5, 0xea, 0xb9, 0xba, 0x70, 0x8e, 0x96, 0xe2, 0x3a, 0x2a, 0xd3, 0x1e, 0x6f, 0xbb, 0x10,
+	0xd0, 0x03, 0x1f, 0xc8, 0x1f, 0xeb, 0x81, 0xd5, 0x7b, 0xbc, 0xbd, 0x23, 0x05, 0x66, 0x5d, 0x6a,
+	0x42, 0xb8, 0x81, 0xe6, 0x24, 0xc2, 0xeb, 0xc4, 0x92, 0xf1, 0x77, 0xc6, 0xb6, 0xaf, 0x60, 0x34,
+	0x94, 0xc2, 0xec, 0x4b, 0xd3, 0x18, 0x7e, 0xa4, 0x28, 0x10, 0xf0, 0x4e, 0x93, 0x72, 0x20, 0xff,
+	0x14, 0xe5, 0xf2, 0x38, 0x25, 0x91, 0x24, 0x98, 0x4c, 0x1d, 0xde, 0x41, 0x15, 0x39, 0x8d, 0x78,
+	0x2e, 0x2e, 0xf5, 0x3c, 0xf2, 0x65, 0x36, 0x6f, 0x9c, 0xe7, 0x31, 0xb0, 0xba, 0xe7, 0x65, 0xc6,
+	0xd1, 0x31, 0xfc, 0x14, 0x2d, 0xa4, 0x18, 0x75, 0x17, 0xc9, 0x57, 0x45, 0xba, 0x62, 0x27, 0xe9,
+	0x4b, 0xac, 0x61, 0xf3, 0x34, 0x13, 0xce, 0x8e, 0xd5, 0x02, 0x4e, 0xbe, 0x9d, 0x3a, 0xd6, 0x2e,
+	0xf0, 0xb1, 0xb1, 0x76, 0x81, 0xe3, 0x16, 0xba, 0x98, 0x62, 0x9a, 0x6d, 0xf1, 0x3a, 0xdc, 0x88,
+	0xc6, 0xf1, 0xdb, 0x90, 0x79, 0xe4, 0xbb, 0x42, 0xde, 0xb4, 0x23, 0xb7, 0xa5, 0x7a, 0x5f, 0x8b,
+	0x13, 0xfa, 0x79, 0x6a, 0x4d, 0xe3, 0x17, 0x68, 0x69, 0x68, 0x5e, 0x71, 0xad, 0x5d, 0x16, 0xfa,
+	0x40, 0x4e, 0x54, 0x8f, 0x6b, 0x39, 0x63, 0xcb, 0x27, 0x11, 0xa6, 0x16, 0x9f, 0xa3, 0xa3, 0x19,
+	0xfc, 0x12, 0x2d, 0xa7, 0x64, 0xf5, 0x42, 0x14, 0xfa, 0x87, 0x42, 0x5f, 0xb7, 0xa3, 0xf5, 0x53,
+	0x19, 0x62, 0x63, 0x3a, 0x96, 0x32, 0xc7, 0x2c, 0x80, 0xd2, 0xfd, 0xf7, 0xa5, 0xbc, 0x63, 0x16,
+	0xfa, 0x51, 0xf7, 0x75, 0xcc, 0xb8, 0x2f, 0x31, 0xda, 0xfd, 0x0f, 0xa5, 0x3c, 0xf7, 0x45, 0x95,
+	0xc5, 0xfd, 0x34, 0x9c, 0x1d, 0x4b, 0xb8, 0xff, 0xf1, 0xd4, 0xb1, 0x46, 0xdd, 0xd7, 0x31, 0xfc,
+	0x0a, 0x55, 0x87, 0x30, 0xd2, 0x94, 0x08, 0x58, 0xb7, 0x13, 0xc7, 0xe2, 0x7f, 0xdd, 0x27, 0xc5,
+	0xbc, 0x95, 0xc3, 0x14, 0xf2, 0x7d, 0xa3, 0x4e, 0xf8, 0x17, 0xa8, 0x3d, 0x8f, 0xbb, 0x68, 0x25,
+	0xed, 0xa5, 0x6d, 0x1a, 0x6a, 0xf6, 0x59, 0x35, 0xbb, 0x6d, 0x6f, 0xa6, 0x1c, 0x19, 0xef, 0x46,
+	0x68, 0x8e, 0x60, 0xed, 0x2c, 0xaa, 0xec, 0x74, 0x23, 0xfe, 0xce, 0x81, 0x38, 0x0a, 0x83, 0x18,
+	0x1e, 0x2e, 0x1c, 0xff, 0xae, 0x9d, 0x39, 0x1e, 0xd4, 0x0a, 0x27, 0x83, 0x5a, 0xe1, 0xd7, 0xa0,
+	0x56, 0x38, 0x98, 0x96, 0xbf, 0x9d, 0x5b, 0xff, 0x03, 0x00, 0x00, 0xff, 0xff, 0xac, 0x8d, 0xf6,
+	0xc5, 0x93, 0x07, 0x00, 0x00,
 }
diff --git a/etcdserver/etcdserverpb/rpc.pb.go b/etcdserver/etcdserverpb/rpc.pb.go
index d503462f7..51c2bfafc 100644
--- a/etcdserver/etcdserverpb/rpc.pb.go
+++ b/etcdserver/etcdserverpb/rpc.pb.go
@@ -319,106 +319,106 @@ func (m *DeleteRangeResponse) GetHeader() *ResponseHeader {
 	return nil
 }
 
-type RequestUnion struct {
+type RequestOp struct {
 	// request is a union of request types accepted by a transaction.
 	//
 	// Types that are valid to be assigned to Request:
-	//	*RequestUnion_RequestRange
-	//	*RequestUnion_RequestPut
-	//	*RequestUnion_RequestDeleteRange
-	Request isRequestUnion_Request `protobuf_oneof:"request"`
+	//	*RequestOp_RequestRange
+	//	*RequestOp_RequestPut
+	//	*RequestOp_RequestDeleteRange
+	Request isRequestOp_Request `protobuf_oneof:"request"`
 }
 
-func (m *RequestUnion) Reset()                    { *m = RequestUnion{} }
-func (m *RequestUnion) String() string            { return proto.CompactTextString(m) }
-func (*RequestUnion) ProtoMessage()               {}
-func (*RequestUnion) Descriptor() ([]byte, []int) { return fileDescriptorRpc, []int{7} }
+func (m *RequestOp) Reset()                    { *m = RequestOp{} }
+func (m *RequestOp) String() string            { return proto.CompactTextString(m) }
+func (*RequestOp) ProtoMessage()               {}
+func (*RequestOp) Descriptor() ([]byte, []int) { return fileDescriptorRpc, []int{7} }
 
-type isRequestUnion_Request interface {
-	isRequestUnion_Request()
+type isRequestOp_Request interface {
+	isRequestOp_Request()
 	MarshalTo([]byte) (int, error)
 	Size() int
 }
 
-type RequestUnion_RequestRange struct {
+type RequestOp_RequestRange struct {
 	RequestRange *RangeRequest `protobuf:"bytes,1,opt,name=request_range,json=requestRange,oneof"`
 }
-type RequestUnion_RequestPut struct {
+type RequestOp_RequestPut struct {
 	RequestPut *PutRequest `protobuf:"bytes,2,opt,name=request_put,json=requestPut,oneof"`
 }
-type RequestUnion_RequestDeleteRange struct {
+type RequestOp_RequestDeleteRange struct {
 	RequestDeleteRange *DeleteRangeRequest `protobuf:"bytes,3,opt,name=request_delete_range,json=requestDeleteRange,oneof"`
 }
 
-func (*RequestUnion_RequestRange) isRequestUnion_Request()       {}
-func (*RequestUnion_RequestPut) isRequestUnion_Request()         {}
-func (*RequestUnion_RequestDeleteRange) isRequestUnion_Request() {}
+func (*RequestOp_RequestRange) isRequestOp_Request()       {}
+func (*RequestOp_RequestPut) isRequestOp_Request()         {}
+func (*RequestOp_RequestDeleteRange) isRequestOp_Request() {}
 
-func (m *RequestUnion) GetRequest() isRequestUnion_Request {
+func (m *RequestOp) GetRequest() isRequestOp_Request {
 	if m != nil {
 		return m.Request
 	}
 	return nil
 }
 
-func (m *RequestUnion) GetRequestRange() *RangeRequest {
-	if x, ok := m.GetRequest().(*RequestUnion_RequestRange); ok {
+func (m *RequestOp) GetRequestRange() *RangeRequest {
+	if x, ok := m.GetRequest().(*RequestOp_RequestRange); ok {
 		return x.RequestRange
 	}
 	return nil
 }
 
-func (m *RequestUnion) GetRequestPut() *PutRequest {
-	if x, ok := m.GetRequest().(*RequestUnion_RequestPut); ok {
+func (m *RequestOp) GetRequestPut() *PutRequest {
+	if x, ok := m.GetRequest().(*RequestOp_RequestPut); ok {
 		return x.RequestPut
 	}
 	return nil
 }
 
-func (m *RequestUnion) GetRequestDeleteRange() *DeleteRangeRequest {
-	if x, ok := m.GetRequest().(*RequestUnion_RequestDeleteRange); ok {
+func (m *RequestOp) GetRequestDeleteRange() *DeleteRangeRequest {
+	if x, ok := m.GetRequest().(*RequestOp_RequestDeleteRange); ok {
 		return x.RequestDeleteRange
 	}
 	return nil
 }
 
 // XXX_OneofFuncs is for the internal use of the proto package.
-func (*RequestUnion) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _RequestUnion_OneofMarshaler, _RequestUnion_OneofUnmarshaler, _RequestUnion_OneofSizer, []interface{}{
-		(*RequestUnion_RequestRange)(nil),
-		(*RequestUnion_RequestPut)(nil),
-		(*RequestUnion_RequestDeleteRange)(nil),
+func (*RequestOp) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _RequestOp_OneofMarshaler, _RequestOp_OneofUnmarshaler, _RequestOp_OneofSizer, []interface{}{
+		(*RequestOp_RequestRange)(nil),
+		(*RequestOp_RequestPut)(nil),
+		(*RequestOp_RequestDeleteRange)(nil),
 	}
 }
 
-func _RequestUnion_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*RequestUnion)
+func _RequestOp_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*RequestOp)
 	// request
 	switch x := m.Request.(type) {
-	case *RequestUnion_RequestRange:
+	case *RequestOp_RequestRange:
 		_ = b.EncodeVarint(1<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.RequestRange); err != nil {
 			return err
 		}
-	case *RequestUnion_RequestPut:
+	case *RequestOp_RequestPut:
 		_ = b.EncodeVarint(2<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.RequestPut); err != nil {
 			return err
 		}
-	case *RequestUnion_RequestDeleteRange:
+	case *RequestOp_RequestDeleteRange:
 		_ = b.EncodeVarint(3<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.RequestDeleteRange); err != nil {
 			return err
 		}
 	case nil:
 	default:
-		return fmt.Errorf("RequestUnion.Request has unexpected type %T", x)
+		return fmt.Errorf("RequestOp.Request has unexpected type %T", x)
 	}
 	return nil
 }
 
-func _RequestUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*RequestUnion)
+func _RequestOp_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*RequestOp)
 	switch tag {
 	case 1: // request.request_range
 		if wire != proto.WireBytes {
@@ -426,7 +426,7 @@ func _RequestUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.B
 		}
 		msg := new(RangeRequest)
 		err := b.DecodeMessage(msg)
-		m.Request = &RequestUnion_RequestRange{msg}
+		m.Request = &RequestOp_RequestRange{msg}
 		return true, err
 	case 2: // request.request_put
 		if wire != proto.WireBytes {
@@ -434,7 +434,7 @@ func _RequestUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.B
 		}
 		msg := new(PutRequest)
 		err := b.DecodeMessage(msg)
-		m.Request = &RequestUnion_RequestPut{msg}
+		m.Request = &RequestOp_RequestPut{msg}
 		return true, err
 	case 3: // request.request_delete_range
 		if wire != proto.WireBytes {
@@ -442,28 +442,28 @@ func _RequestUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.B
 		}
 		msg := new(DeleteRangeRequest)
 		err := b.DecodeMessage(msg)
-		m.Request = &RequestUnion_RequestDeleteRange{msg}
+		m.Request = &RequestOp_RequestDeleteRange{msg}
 		return true, err
 	default:
 		return false, nil
 	}
 }
 
-func _RequestUnion_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*RequestUnion)
+func _RequestOp_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*RequestOp)
 	// request
 	switch x := m.Request.(type) {
-	case *RequestUnion_RequestRange:
+	case *RequestOp_RequestRange:
 		s := proto.Size(x.RequestRange)
 		n += proto.SizeVarint(1<<3 | proto.WireBytes)
 		n += proto.SizeVarint(uint64(s))
 		n += s
-	case *RequestUnion_RequestPut:
+	case *RequestOp_RequestPut:
 		s := proto.Size(x.RequestPut)
 		n += proto.SizeVarint(2<<3 | proto.WireBytes)
 		n += proto.SizeVarint(uint64(s))
 		n += s
-	case *RequestUnion_RequestDeleteRange:
+	case *RequestOp_RequestDeleteRange:
 		s := proto.Size(x.RequestDeleteRange)
 		n += proto.SizeVarint(3<<3 | proto.WireBytes)
 		n += proto.SizeVarint(uint64(s))
@@ -475,106 +475,106 @@ func _RequestUnion_OneofSizer(msg proto.Message) (n int) {
 	return n
 }
 
-type ResponseUnion struct {
+type ResponseOp struct {
 	// response is a union of response types returned by a transaction.
 	//
 	// Types that are valid to be assigned to Response:
-	//	*ResponseUnion_ResponseRange
-	//	*ResponseUnion_ResponsePut
-	//	*ResponseUnion_ResponseDeleteRange
-	Response isResponseUnion_Response `protobuf_oneof:"response"`
+	//	*ResponseOp_ResponseRange
+	//	*ResponseOp_ResponsePut
+	//	*ResponseOp_ResponseDeleteRange
+	Response isResponseOp_Response `protobuf_oneof:"response"`
 }
 
-func (m *ResponseUnion) Reset()                    { *m = ResponseUnion{} }
-func (m *ResponseUnion) String() string            { return proto.CompactTextString(m) }
-func (*ResponseUnion) ProtoMessage()               {}
-func (*ResponseUnion) Descriptor() ([]byte, []int) { return fileDescriptorRpc, []int{8} }
+func (m *ResponseOp) Reset()                    { *m = ResponseOp{} }
+func (m *ResponseOp) String() string            { return proto.CompactTextString(m) }
+func (*ResponseOp) ProtoMessage()               {}
+func (*ResponseOp) Descriptor() ([]byte, []int) { return fileDescriptorRpc, []int{8} }
 
-type isResponseUnion_Response interface {
-	isResponseUnion_Response()
+type isResponseOp_Response interface {
+	isResponseOp_Response()
 	MarshalTo([]byte) (int, error)
 	Size() int
 }
 
-type ResponseUnion_ResponseRange struct {
+type ResponseOp_ResponseRange struct {
 	ResponseRange *RangeResponse `protobuf:"bytes,1,opt,name=response_range,json=responseRange,oneof"`
 }
-type ResponseUnion_ResponsePut struct {
+type ResponseOp_ResponsePut struct {
 	ResponsePut *PutResponse `protobuf:"bytes,2,opt,name=response_put,json=responsePut,oneof"`
 }
-type ResponseUnion_ResponseDeleteRange struct {
+type ResponseOp_ResponseDeleteRange struct {
 	ResponseDeleteRange *DeleteRangeResponse `protobuf:"bytes,3,opt,name=response_delete_range,json=responseDeleteRange,oneof"`
 }
 
-func (*ResponseUnion_ResponseRange) isResponseUnion_Response()       {}
-func (*ResponseUnion_ResponsePut) isResponseUnion_Response()         {}
-func (*ResponseUnion_ResponseDeleteRange) isResponseUnion_Response() {}
+func (*ResponseOp_ResponseRange) isResponseOp_Response()       {}
+func (*ResponseOp_ResponsePut) isResponseOp_Response()         {}
+func (*ResponseOp_ResponseDeleteRange) isResponseOp_Response() {}
 
-func (m *ResponseUnion) GetResponse() isResponseUnion_Response {
+func (m *ResponseOp) GetResponse() isResponseOp_Response {
 	if m != nil {
 		return m.Response
 	}
 	return nil
 }
 
-func (m *ResponseUnion) GetResponseRange() *RangeResponse {
-	if x, ok := m.GetResponse().(*ResponseUnion_ResponseRange); ok {
+func (m *ResponseOp) GetResponseRange() *RangeResponse {
+	if x, ok := m.GetResponse().(*ResponseOp_ResponseRange); ok {
 		return x.ResponseRange
 	}
 	return nil
 }
 
-func (m *ResponseUnion) GetResponsePut() *PutResponse {
-	if x, ok := m.GetResponse().(*ResponseUnion_ResponsePut); ok {
+func (m *ResponseOp) GetResponsePut() *PutResponse {
+	if x, ok := m.GetResponse().(*ResponseOp_ResponsePut); ok {
 		return x.ResponsePut
 	}
 	return nil
 }
 
-func (m *ResponseUnion) GetResponseDeleteRange() *DeleteRangeResponse {
-	if x, ok := m.GetResponse().(*ResponseUnion_ResponseDeleteRange); ok {
+func (m *ResponseOp) GetResponseDeleteRange() *DeleteRangeResponse {
+	if x, ok := m.GetResponse().(*ResponseOp_ResponseDeleteRange); ok {
 		return x.ResponseDeleteRange
 	}
 	return nil
 }
 
 // XXX_OneofFuncs is for the internal use of the proto package.
-func (*ResponseUnion) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _ResponseUnion_OneofMarshaler, _ResponseUnion_OneofUnmarshaler, _ResponseUnion_OneofSizer, []interface{}{
-		(*ResponseUnion_ResponseRange)(nil),
-		(*ResponseUnion_ResponsePut)(nil),
-		(*ResponseUnion_ResponseDeleteRange)(nil),
+func (*ResponseOp) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ResponseOp_OneofMarshaler, _ResponseOp_OneofUnmarshaler, _ResponseOp_OneofSizer, []interface{}{
+		(*ResponseOp_ResponseRange)(nil),
+		(*ResponseOp_ResponsePut)(nil),
+		(*ResponseOp_ResponseDeleteRange)(nil),
 	}
 }
 
-func _ResponseUnion_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*ResponseUnion)
+func _ResponseOp_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ResponseOp)
 	// response
 	switch x := m.Response.(type) {
-	case *ResponseUnion_ResponseRange:
+	case *ResponseOp_ResponseRange:
 		_ = b.EncodeVarint(1<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.ResponseRange); err != nil {
 			return err
 		}
-	case *ResponseUnion_ResponsePut:
+	case *ResponseOp_ResponsePut:
 		_ = b.EncodeVarint(2<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.ResponsePut); err != nil {
 			return err
 		}
-	case *ResponseUnion_ResponseDeleteRange:
+	case *ResponseOp_ResponseDeleteRange:
 		_ = b.EncodeVarint(3<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.ResponseDeleteRange); err != nil {
 			return err
 		}
 	case nil:
 	default:
-		return fmt.Errorf("ResponseUnion.Response has unexpected type %T", x)
+		return fmt.Errorf("ResponseOp.Response has unexpected type %T", x)
 	}
 	return nil
 }
 
-func _ResponseUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*ResponseUnion)
+func _ResponseOp_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ResponseOp)
 	switch tag {
 	case 1: // response.response_range
 		if wire != proto.WireBytes {
@@ -582,7 +582,7 @@ func _ResponseUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.
 		}
 		msg := new(RangeResponse)
 		err := b.DecodeMessage(msg)
-		m.Response = &ResponseUnion_ResponseRange{msg}
+		m.Response = &ResponseOp_ResponseRange{msg}
 		return true, err
 	case 2: // response.response_put
 		if wire != proto.WireBytes {
@@ -590,7 +590,7 @@ func _ResponseUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.
 		}
 		msg := new(PutResponse)
 		err := b.DecodeMessage(msg)
-		m.Response = &ResponseUnion_ResponsePut{msg}
+		m.Response = &ResponseOp_ResponsePut{msg}
 		return true, err
 	case 3: // response.response_delete_range
 		if wire != proto.WireBytes {
@@ -598,28 +598,28 @@ func _ResponseUnion_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.
 		}
 		msg := new(DeleteRangeResponse)
 		err := b.DecodeMessage(msg)
-		m.Response = &ResponseUnion_ResponseDeleteRange{msg}
+		m.Response = &ResponseOp_ResponseDeleteRange{msg}
 		return true, err
 	default:
 		return false, nil
 	}
 }
 
-func _ResponseUnion_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*ResponseUnion)
+func _ResponseOp_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ResponseOp)
 	// response
 	switch x := m.Response.(type) {
-	case *ResponseUnion_ResponseRange:
+	case *ResponseOp_ResponseRange:
 		s := proto.Size(x.ResponseRange)
 		n += proto.SizeVarint(1<<3 | proto.WireBytes)
 		n += proto.SizeVarint(uint64(s))
 		n += s
-	case *ResponseUnion_ResponsePut:
+	case *ResponseOp_ResponsePut:
 		s := proto.Size(x.ResponsePut)
 		n += proto.SizeVarint(2<<3 | proto.WireBytes)
 		n += proto.SizeVarint(uint64(s))
 		n += s
-	case *ResponseUnion_ResponseDeleteRange:
+	case *ResponseOp_ResponseDeleteRange:
 		s := proto.Size(x.ResponseDeleteRange)
 		n += proto.SizeVarint(3<<3 | proto.WireBytes)
 		n += proto.SizeVarint(uint64(s))
@@ -826,9 +826,9 @@ type TxnRequest struct {
 	// and the response will contain their respective responses in order.
 	Compare []*Compare `protobuf:"bytes,1,rep,name=compare" json:"compare,omitempty"`
 	// success is a list of requests which will be applied when compare evaluates to true.
-	Success []*RequestUnion `protobuf:"bytes,2,rep,name=success" json:"success,omitempty"`
+	Success []*RequestOp `protobuf:"bytes,2,rep,name=success" json:"success,omitempty"`
 	// failure is a list of requests which will be applied when compare evaluates to false.
-	Failure []*RequestUnion `protobuf:"bytes,3,rep,name=failure" json:"failure,omitempty"`
+	Failure []*RequestOp `protobuf:"bytes,3,rep,name=failure" json:"failure,omitempty"`
 }
 
 func (m *TxnRequest) Reset()                    { *m = TxnRequest{} }
@@ -843,14 +843,14 @@ func (m *TxnRequest) GetCompare() []*Compare {
 	return nil
 }
 
-func (m *TxnRequest) GetSuccess() []*RequestUnion {
+func (m *TxnRequest) GetSuccess() []*RequestOp {
 	if m != nil {
 		return m.Success
 	}
 	return nil
 }
 
-func (m *TxnRequest) GetFailure() []*RequestUnion {
+func (m *TxnRequest) GetFailure() []*RequestOp {
 	if m != nil {
 		return m.Failure
 	}
@@ -863,7 +863,7 @@ type TxnResponse struct {
 	Succeeded bool `protobuf:"varint,2,opt,name=succeeded,proto3" json:"succeeded,omitempty"`
 	// responses is a list of responses corresponding to the results from applying
 	// success if succeeded is true or failure if succeeded is false.
-	Responses []*ResponseUnion `protobuf:"bytes,3,rep,name=responses" json:"responses,omitempty"`
+	Responses []*ResponseOp `protobuf:"bytes,3,rep,name=responses" json:"responses,omitempty"`
 }
 
 func (m *TxnResponse) Reset()                    { *m = TxnResponse{} }
@@ -878,7 +878,7 @@ func (m *TxnResponse) GetHeader() *ResponseHeader {
 	return nil
 }
 
-func (m *TxnResponse) GetResponses() []*ResponseUnion {
+func (m *TxnResponse) GetResponses() []*ResponseOp {
 	if m != nil {
 		return m.Responses
 	}
@@ -1912,8 +1912,8 @@ func init() {
 	proto.RegisterType((*PutResponse)(nil), "etcdserverpb.PutResponse")
 	proto.RegisterType((*DeleteRangeRequest)(nil), "etcdserverpb.DeleteRangeRequest")
 	proto.RegisterType((*DeleteRangeResponse)(nil), "etcdserverpb.DeleteRangeResponse")
-	proto.RegisterType((*RequestUnion)(nil), "etcdserverpb.RequestUnion")
-	proto.RegisterType((*ResponseUnion)(nil), "etcdserverpb.ResponseUnion")
+	proto.RegisterType((*RequestOp)(nil), "etcdserverpb.RequestOp")
+	proto.RegisterType((*ResponseOp)(nil), "etcdserverpb.ResponseOp")
 	proto.RegisterType((*Compare)(nil), "etcdserverpb.Compare")
 	proto.RegisterType((*TxnRequest)(nil), "etcdserverpb.TxnRequest")
 	proto.RegisterType((*TxnResponse)(nil), "etcdserverpb.TxnResponse")
@@ -3696,7 +3696,7 @@ func (m *DeleteRangeResponse) MarshalTo(data []byte) (int, error) {
 	return i, nil
 }
 
-func (m *RequestUnion) Marshal() (data []byte, err error) {
+func (m *RequestOp) Marshal() (data []byte, err error) {
 	size := m.Size()
 	data = make([]byte, size)
 	n, err := m.MarshalTo(data)
@@ -3706,7 +3706,7 @@ func (m *RequestUnion) Marshal() (data []byte, err error) {
 	return data[:n], nil
 }
 
-func (m *RequestUnion) MarshalTo(data []byte) (int, error) {
+func (m *RequestOp) MarshalTo(data []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -3721,7 +3721,7 @@ func (m *RequestUnion) MarshalTo(data []byte) (int, error) {
 	return i, nil
 }
 
-func (m *RequestUnion_RequestRange) MarshalTo(data []byte) (int, error) {
+func (m *RequestOp_RequestRange) MarshalTo(data []byte) (int, error) {
 	i := 0
 	if m.RequestRange != nil {
 		data[i] = 0xa
@@ -3735,7 +3735,7 @@ func (m *RequestUnion_RequestRange) MarshalTo(data []byte) (int, error) {
 	}
 	return i, nil
 }
-func (m *RequestUnion_RequestPut) MarshalTo(data []byte) (int, error) {
+func (m *RequestOp_RequestPut) MarshalTo(data []byte) (int, error) {
 	i := 0
 	if m.RequestPut != nil {
 		data[i] = 0x12
@@ -3749,7 +3749,7 @@ func (m *RequestUnion_RequestPut) MarshalTo(data []byte) (int, error) {
 	}
 	return i, nil
 }
-func (m *RequestUnion_RequestDeleteRange) MarshalTo(data []byte) (int, error) {
+func (m *RequestOp_RequestDeleteRange) MarshalTo(data []byte) (int, error) {
 	i := 0
 	if m.RequestDeleteRange != nil {
 		data[i] = 0x1a
@@ -3763,7 +3763,7 @@ func (m *RequestUnion_RequestDeleteRange) MarshalTo(data []byte) (int, error) {
 	}
 	return i, nil
 }
-func (m *ResponseUnion) Marshal() (data []byte, err error) {
+func (m *ResponseOp) Marshal() (data []byte, err error) {
 	size := m.Size()
 	data = make([]byte, size)
 	n, err := m.MarshalTo(data)
@@ -3773,7 +3773,7 @@ func (m *ResponseUnion) Marshal() (data []byte, err error) {
 	return data[:n], nil
 }
 
-func (m *ResponseUnion) MarshalTo(data []byte) (int, error) {
+func (m *ResponseOp) MarshalTo(data []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -3788,7 +3788,7 @@ func (m *ResponseUnion) MarshalTo(data []byte) (int, error) {
 	return i, nil
 }
 
-func (m *ResponseUnion_ResponseRange) MarshalTo(data []byte) (int, error) {
+func (m *ResponseOp_ResponseRange) MarshalTo(data []byte) (int, error) {
 	i := 0
 	if m.ResponseRange != nil {
 		data[i] = 0xa
@@ -3802,7 +3802,7 @@ func (m *ResponseUnion_ResponseRange) MarshalTo(data []byte) (int, error) {
 	}
 	return i, nil
 }
-func (m *ResponseUnion_ResponsePut) MarshalTo(data []byte) (int, error) {
+func (m *ResponseOp_ResponsePut) MarshalTo(data []byte) (int, error) {
 	i := 0
 	if m.ResponsePut != nil {
 		data[i] = 0x12
@@ -3816,7 +3816,7 @@ func (m *ResponseUnion_ResponsePut) MarshalTo(data []byte) (int, error) {
 	}
 	return i, nil
 }
-func (m *ResponseUnion_ResponseDeleteRange) MarshalTo(data []byte) (int, error) {
+func (m *ResponseOp_ResponseDeleteRange) MarshalTo(data []byte) (int, error) {
 	i := 0
 	if m.ResponseDeleteRange != nil {
 		data[i] = 0x1a
@@ -6016,7 +6016,7 @@ func (m *DeleteRangeResponse) Size() (n int) {
 	return n
 }
 
-func (m *RequestUnion) Size() (n int) {
+func (m *RequestOp) Size() (n int) {
 	var l int
 	_ = l
 	if m.Request != nil {
@@ -6025,7 +6025,7 @@ func (m *RequestUnion) Size() (n int) {
 	return n
 }
 
-func (m *RequestUnion_RequestRange) Size() (n int) {
+func (m *RequestOp_RequestRange) Size() (n int) {
 	var l int
 	_ = l
 	if m.RequestRange != nil {
@@ -6034,7 +6034,7 @@ func (m *RequestUnion_RequestRange) Size() (n int) {
 	}
 	return n
 }
-func (m *RequestUnion_RequestPut) Size() (n int) {
+func (m *RequestOp_RequestPut) Size() (n int) {
 	var l int
 	_ = l
 	if m.RequestPut != nil {
@@ -6043,7 +6043,7 @@ func (m *RequestUnion_RequestPut) Size() (n int) {
 	}
 	return n
 }
-func (m *RequestUnion_RequestDeleteRange) Size() (n int) {
+func (m *RequestOp_RequestDeleteRange) Size() (n int) {
 	var l int
 	_ = l
 	if m.RequestDeleteRange != nil {
@@ -6052,7 +6052,7 @@ func (m *RequestUnion_RequestDeleteRange) Size() (n int) {
 	}
 	return n
 }
-func (m *ResponseUnion) Size() (n int) {
+func (m *ResponseOp) Size() (n int) {
 	var l int
 	_ = l
 	if m.Response != nil {
@@ -6061,7 +6061,7 @@ func (m *ResponseUnion) Size() (n int) {
 	return n
 }
 
-func (m *ResponseUnion_ResponseRange) Size() (n int) {
+func (m *ResponseOp_ResponseRange) Size() (n int) {
 	var l int
 	_ = l
 	if m.ResponseRange != nil {
@@ -6070,7 +6070,7 @@ func (m *ResponseUnion_ResponseRange) Size() (n int) {
 	}
 	return n
 }
-func (m *ResponseUnion_ResponsePut) Size() (n int) {
+func (m *ResponseOp_ResponsePut) Size() (n int) {
 	var l int
 	_ = l
 	if m.ResponsePut != nil {
@@ -6079,7 +6079,7 @@ func (m *ResponseUnion_ResponsePut) Size() (n int) {
 	}
 	return n
 }
-func (m *ResponseUnion_ResponseDeleteRange) Size() (n int) {
+func (m *ResponseOp_ResponseDeleteRange) Size() (n int) {
 	var l int
 	_ = l
 	if m.ResponseDeleteRange != nil {
@@ -7834,7 +7834,7 @@ func (m *DeleteRangeResponse) Unmarshal(data []byte) error {
 	}
 	return nil
 }
-func (m *RequestUnion) Unmarshal(data []byte) error {
+func (m *RequestOp) Unmarshal(data []byte) error {
 	l := len(data)
 	iNdEx := 0
 	for iNdEx < l {
@@ -7857,10 +7857,10 @@ func (m *RequestUnion) Unmarshal(data []byte) error {
 		fieldNum := int32(wire >> 3)
 		wireType := int(wire & 0x7)
 		if wireType == 4 {
-			return fmt.Errorf("proto: RequestUnion: wiretype end group for non-group")
+			return fmt.Errorf("proto: RequestOp: wiretype end group for non-group")
 		}
 		if fieldNum <= 0 {
-			return fmt.Errorf("proto: RequestUnion: illegal tag %d (wire type %d)", fieldNum, wire)
+			return fmt.Errorf("proto: RequestOp: illegal tag %d (wire type %d)", fieldNum, wire)
 		}
 		switch fieldNum {
 		case 1:
@@ -7893,7 +7893,7 @@ func (m *RequestUnion) Unmarshal(data []byte) error {
 			if err := v.Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
-			m.Request = &RequestUnion_RequestRange{v}
+			m.Request = &RequestOp_RequestRange{v}
 			iNdEx = postIndex
 		case 2:
 			if wireType != 2 {
@@ -7925,7 +7925,7 @@ func (m *RequestUnion) Unmarshal(data []byte) error {
 			if err := v.Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
-			m.Request = &RequestUnion_RequestPut{v}
+			m.Request = &RequestOp_RequestPut{v}
 			iNdEx = postIndex
 		case 3:
 			if wireType != 2 {
@@ -7957,7 +7957,7 @@ func (m *RequestUnion) Unmarshal(data []byte) error {
 			if err := v.Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
-			m.Request = &RequestUnion_RequestDeleteRange{v}
+			m.Request = &RequestOp_RequestDeleteRange{v}
 			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
@@ -7980,7 +7980,7 @@ func (m *RequestUnion) Unmarshal(data []byte) error {
 	}
 	return nil
 }
-func (m *ResponseUnion) Unmarshal(data []byte) error {
+func (m *ResponseOp) Unmarshal(data []byte) error {
 	l := len(data)
 	iNdEx := 0
 	for iNdEx < l {
@@ -8003,10 +8003,10 @@ func (m *ResponseUnion) Unmarshal(data []byte) error {
 		fieldNum := int32(wire >> 3)
 		wireType := int(wire & 0x7)
 		if wireType == 4 {
-			return fmt.Errorf("proto: ResponseUnion: wiretype end group for non-group")
+			return fmt.Errorf("proto: ResponseOp: wiretype end group for non-group")
 		}
 		if fieldNum <= 0 {
-			return fmt.Errorf("proto: ResponseUnion: illegal tag %d (wire type %d)", fieldNum, wire)
+			return fmt.Errorf("proto: ResponseOp: illegal tag %d (wire type %d)", fieldNum, wire)
 		}
 		switch fieldNum {
 		case 1:
@@ -8039,7 +8039,7 @@ func (m *ResponseUnion) Unmarshal(data []byte) error {
 			if err := v.Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
-			m.Response = &ResponseUnion_ResponseRange{v}
+			m.Response = &ResponseOp_ResponseRange{v}
 			iNdEx = postIndex
 		case 2:
 			if wireType != 2 {
@@ -8071,7 +8071,7 @@ func (m *ResponseUnion) Unmarshal(data []byte) error {
 			if err := v.Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
-			m.Response = &ResponseUnion_ResponsePut{v}
+			m.Response = &ResponseOp_ResponsePut{v}
 			iNdEx = postIndex
 		case 3:
 			if wireType != 2 {
@@ -8103,7 +8103,7 @@ func (m *ResponseUnion) Unmarshal(data []byte) error {
 			if err := v.Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
-			m.Response = &ResponseUnion_ResponseDeleteRange{v}
+			m.Response = &ResponseOp_ResponseDeleteRange{v}
 			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
@@ -8421,7 +8421,7 @@ func (m *TxnRequest) Unmarshal(data []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Success = append(m.Success, &RequestUnion{})
+			m.Success = append(m.Success, &RequestOp{})
 			if err := m.Success[len(m.Success)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
@@ -8452,7 +8452,7 @@ func (m *TxnRequest) Unmarshal(data []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Failure = append(m.Failure, &RequestUnion{})
+			m.Failure = append(m.Failure, &RequestOp{})
 			if err := m.Failure[len(m.Failure)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
@@ -8586,7 +8586,7 @@ func (m *TxnResponse) Unmarshal(data []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Responses = append(m.Responses, &ResponseUnion{})
+			m.Responses = append(m.Responses, &ResponseOp{})
 			if err := m.Responses[len(m.Responses)-1].Unmarshal(data[iNdEx:postIndex]); err != nil {
 				return err
 			}
@@ -14365,171 +14365,172 @@ var (
 )
 
 var fileDescriptorRpc = []byte{
-	// 2650 bytes of a gzipped FileDescriptorProto
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+	0x95, 0xdb, 0x67, 0xb4, 0xd0, 0x3b, 0x14, 0x13, 0xfe, 0xb7, 0x7e, 0x6e, 0x42, 0x23, 0xf0, 0x93,
+	0xd5, 0x20, 0xce, 0x48, 0x75, 0x60, 0xea, 0x89, 0x9c, 0x29, 0x19, 0xec, 0x99, 0xca, 0x5c, 0x67,
+	0x14, 0x7c, 0x04, 0xe9, 0x33, 0x6e, 0xc3, 0x75, 0x89, 0x21, 0xaa, 0x83, 0x28, 0xc8, 0x8c, 0x43,
+	0x49, 0x20, 0x22, 0x60, 0xd4, 0xf4, 0xf2, 0xb0, 0xab, 0x9a, 0xd1, 0xd0, 0x32, 0x4c, 0x4d, 0xc1,
+	0x14, 0xa1, 0xa5, 0x9a, 0x33, 0xa1, 0x9d, 0x51, 0xfe, 0x39, 0xac, 0x06, 0xb0, 0x34, 0x12, 0x87,
+	0xc4, 0x1d, 0x5b, 0x9e, 0xa7, 0xb4, 0x75, 0x49, 0x4b, 0xb9, 0x0f, 0xf9, 0x09, 0x11, 0x2c, 0x51,
+	0xde, 0x40, 0x4d, 0x7e, 0x89, 0xdd, 0x54, 0x8c, 0xd9, 0x7b, 0xbc, 0x05, 0xb7, 0x25, 0x3a, 0x8f,
+	0x51, 0x22, 0x7c, 0xdc, 0x29, 0x59, 0xf2, 0xf3, 0x40, 0xd1, 0x47, 0x4a, 0xf0, 0xea, 0x81, 0x48,
+	0x45, 0xf0, 0xbb, 0xfc, 0xc4, 0x04, 0xe7, 0x28, 0x15, 0x58, 0x1f, 0x56, 0xa2, 0xc7, 0x2f, 0x15,
+	0xf7, 0xac, 0xc0, 0x82, 0xef, 0xbc, 0x22, 0x92, 0x79, 0xf8, 0x40, 0x3a, 0x1c, 0x9c, 0xcd, 0x54,
+	0x0e, 0x9b, 0x21, 0x18, 0xcb, 0xa3, 0xb4, 0xfe, 0xd2, 0x0d, 0x93, 0x45, 0x08, 0x1f, 0xe0, 0x7d,
+	0xb8, 0x16, 0x3f, 0xdb, 0xa9, 0x5c, 0x3e, 0xe6, 0x39, 0x9a, 0x74, 0xfc, 0x53, 0xe1, 0x3e, 0x0d,
+	0x4f, 0xb0, 0xc2, 0x02, 0xa9, 0x20, 0x0d, 0xd0, 0x93, 0x48, 0xe1, 0x7f, 0x91, 0xaf, 0x01, 0x47,
+	0xa4, 0x02, 0xf3, 0x42, 0xb0, 0xf4, 0xdb, 0x1f, 0xd2, 0x40, 0xee, 0x52, 0x1a, 0x10, 0x09, 0xa1,
+	0x32, 0x52, 0xaa, 0x45, 0x3c, 0x0f, 0x69, 0x65, 0x86, 0xb4, 0x52, 0x01, 0xbf, 0x80, 0xb5, 0xf9,
+	0x7c, 0x95, 0x06, 0xf9, 0x87, 0x18, 0x4a, 0x41, 0xf5, 0xa4, 0xfc, 0x52, 0x54, 0x86, 0xe2, 0xfe,
+	0xc1, 0xd1, 0x61, 0xab, 0xdd, 0xad, 0x6b, 0x1b, 0xff, 0xc8, 0x42, 0x76, 0xf7, 0x18, 0x6d, 0xc2,
+	0x02, 0xbf, 0xe9, 0xbe, 0xe4, 0x87, 0x00, 0xfd, 0xb2, 0x3b, 0x73, 0x9c, 0x41, 0x5f, 0x40, 0xee,
+	0x70, 0xea, 0xa3, 0xb9, 0xbf, 0x04, 0xe8, 0xf3, 0xef, 0xcb, 0x71, 0x06, 0xf5, 0xa0, 0xac, 0x5c,
+	0x6c, 0xa3, 0xf7, 0xfe, 0x12, 0xa0, 0xbf, 0xff, 0xd2, 0x9c, 0xfb, 0xd4, 0x7b, 0x63, 0xc7, 0x7d,
+	0x0a, 0x2f, 0x62, 0xe3, 0x3e, 0x29, 0x97, 0x9f, 0x38, 0x83, 0xf6, 0xc5, 0x85, 0xfa, 0xc0, 0x47,
+	0xb7, 0x13, 0xee, 0x67, 0xd5, 0x9b, 0x48, 0x7d, 0x6d, 0xbe, 0x82, 0xc4, 0xdb, 0x38, 0x80, 0x05,
+	0x76, 0x4b, 0x83, 0xbe, 0x92, 0x0f, 0x7a, 0xc2, 0x1d, 0xd6, 0x9c, 0x70, 0x47, 0xee, 0x77, 0x70,
+	0x66, 0x5d, 0xfb, 0x4c, 0xdb, 0xf8, 0x2e, 0x0b, 0x0b, 0xac, 0x6b, 0x47, 0x4f, 0x01, 0xc2, 0xeb,
+	0x8d, 0xb8, 0xb7, 0x33, 0x17, 0x26, 0x71, 0x6f, 0x67, 0x6f, 0x46, 0xf8, 0x8e, 0x28, 0xf7, 0x10,
+	0x28, 0xc9, 0x24, 0x72, 0x91, 0x11, 0xdf, 0x91, 0x84, 0x4b, 0x0c, 0x9c, 0x41, 0x26, 0xd4, 0xa2,
+	0xf7, 0x0c, 0xe8, 0x4e, 0x82, 0x59, 0xfc, 0xba, 0x42, 0xbf, 0x7b, 0xb9, 0x52, 0x24, 0x2a, 0x7f,
+	0xcd, 0x42, 0xb1, 0xcd, 0x7f, 0xa8, 0x46, 0xfb, 0x50, 0x0a, 0x5a, 0x79, 0xb4, 0x9a, 0xd4, 0xe6,
+	0x85, 0x35, 0x90, 0x7e, 0x7b, 0xee, 0xfb, 0xc0, 0xfd, 0xe7, 0x50, 0x51, 0x5b, 0x6f, 0xf4, 0x51,
+	0x62, 0xe7, 0xa8, 0x76, 0xef, 0x3a, 0xbe, 0x4c, 0x65, 0x16, 0x98, 0xb7, 0xd0, 0xc9, 0xc0, 0x91,
+	0x0e, 0x3d, 0x19, 0x38, 0xda, 0x81, 0xe3, 0x0c, 0xcd, 0x8c, 0xb0, 0x71, 0x46, 0x89, 0x4b, 0x54,
+	0xfa, 0xec, 0x78, 0x66, 0xcc, 0xf6, 0xdc, 0x38, 0xb3, 0xf1, 0xef, 0x2c, 0x94, 0x9f, 0x98, 0x96,
+	0xed, 0x13, 0xdb, 0xb4, 0x07, 0x84, 0xb2, 0x07, 0x23, 0x9a, 0x78, 0x3a, 0xab, 0x6d, 0x6a, 0x3c,
+	0x9d, 0x23, 0x3d, 0x1c, 0xce, 0xa0, 0x2e, 0x14, 0x78, 0x2b, 0x85, 0x62, 0x8a, 0x91, 0x96, 0x4b,
+	0xbf, 0x99, 0xfc, 0x52, 0x5d, 0x6d, 0xd8, 0x95, 0xc7, 0x57, 0x3b, 0xd3, 0xc4, 0xeb, 0x6b, 0xf3,
+	0x15, 0x02, 0xc8, 0x9f, 0x41, 0x7e, 0xdb, 0xf4, 0xce, 0x50, 0x8c, 0x2a, 0x94, 0x3b, 0x7f, 0x5d,
+	0x4f, 0x7a, 0x15, 0x00, 0x3c, 0x81, 0x45, 0x79, 0x47, 0x8f, 0x6e, 0xc5, 0xfc, 0x8f, 0xde, 0xe7,
+	0xeb, 0xab, 0xf3, 0x5e, 0x4b, 0xb0, 0xcf, 0xb4, 0x8d, 0xdf, 0x03, 0xe4, 0xe9, 0x17, 0x83, 0xae,
+	0x35, 0x2c, 0x50, 0xe3, 0x6b, 0x9d, 0xe9, 0xe5, 0xe2, 0x6b, 0x9d, 0xad, 0x6d, 0xf9, 0x99, 0x57,
+	0xea, 0x54, 0x94, 0x60, 0x12, 0x6d, 0x05, 0xe3, 0x67, 0x3e, 0xa1, 0xc8, 0xe5, 0xb9, 0xad, 0x16,
+	0xac, 0x28, 0xc1, 0x28, 0xd6, 0x4b, 0xc6, 0x73, 0x3b, 0xa9, 0xde, 0xc5, 0x19, 0x74, 0x08, 0x45,
+	0x51, 0xa1, 0x26, 0xb9, 0x1a, 0x6d, 0x2c, 0x93, 0x5c, 0x8d, 0x95, 0xb7, 0x21, 0xe2, 0x16, 0xf1,
+	0xe7, 0x21, 0x86, 0x9d, 0xd0, 0x3c, 0x44, 0xa5, 0xc8, 0xc1, 0x19, 0xf4, 0x0d, 0x40, 0x58, 0x95,
+	0xc6, 0xc9, 0x2e, 0xb1, 0x1f, 0x8d, 0x93, 0x5d, 0x72, 0x61, 0x8b, 0x33, 0xe8, 0x5b, 0x40, 0xb3,
+	0x05, 0x2a, 0xfa, 0x24, 0xd9, 0x3a, 0xb1, 0x8b, 0xd5, 0x1f, 0x7e, 0x98, 0x72, 0x30, 0x65, 0x1f,
+	0xaa, 0x91, 0xda, 0x15, 0xdd, 0x9f, 0x13, 0x83, 0x58, 0x8b, 0xab, 0x3f, 0x78, 0xaf, 0x5e, 0x30,
+	0x07, 0x81, 0x5a, 0xb4, 0x98, 0x45, 0x73, 0x8c, 0x67, 0x7a, 0x60, 0x7d, 0xfd, 0xfd, 0x8a, 0xea,
+	0x56, 0x8b, 0xfa, 0x36, 0x69, 0xab, 0xa3, 0xed, 0x71, 0xd2, 0x56, 0xc7, 0x8a, 0xe3, 0x10, 0x71,
+	0x4e, 0xf2, 0x44, 0xdb, 0xe8, 0x79, 0x88, 0x33, 0xc9, 0x13, 0x56, 0xb0, 0x49, 0xc9, 0x33, 0xd3,
+	0x71, 0x27, 0x25, 0xcf, 0x6c, 0x11, 0x8c, 0x33, 0xc8, 0x87, 0xe5, 0x84, 0x62, 0x16, 0x3d, 0x9c,
+	0xe3, 0x56, 0x62, 0xa3, 0xae, 0x7f, 0xfa, 0x81, 0xda, 0xc1, 0xac, 0xaf, 0x61, 0x25, 0xa9, 0xd2,
+	0x45, 0x73, 0x80, 0xe6, 0x74, 0xf0, 0x7a, 0xf3, 0x43, 0xd5, 0xe5, 0xc4, 0x9b, 0x95, 0x3f, 0xbe,
+	0x5b, 0xd5, 0xfe, 0xf2, 0x6e, 0x55, 0xfb, 0xdb, 0xbb, 0x55, 0xad, 0x5f, 0x60, 0xff, 0xed, 0xed,
+	0x47, 0xff, 0x09, 0x00, 0x00, 0xff, 0xff, 0x7a, 0xd6, 0x18, 0xf9, 0x5f, 0x27, 0x00, 0x00,
 }
diff --git a/etcdserver/etcdserverpb/rpc.proto b/etcdserver/etcdserverpb/rpc.proto
index aa6809276..15962522a 100644
--- a/etcdserver/etcdserverpb/rpc.proto
+++ b/etcdserver/etcdserverpb/rpc.proto
@@ -229,7 +229,7 @@ message DeleteRangeResponse {
   int64 deleted = 2;
 }
 
-message RequestUnion {
+message RequestOp {
   // request is a union of request types accepted by a transaction.
   oneof request {
     RangeRequest request_range = 1;
@@ -238,7 +238,7 @@ message RequestUnion {
   }
 }
 
-message ResponseUnion {
+message ResponseOp {
   // response is a union of response types returned by a transaction.
   oneof response {
     RangeResponse response_range = 1;
@@ -300,9 +300,9 @@ message TxnRequest {
   // and the response will contain their respective responses in order.
   repeated Compare compare = 1;
   // success is a list of requests which will be applied when compare evaluates to true.
-  repeated RequestUnion success = 2;
+  repeated RequestOp success = 2;
   // failure is a list of requests which will be applied when compare evaluates to false.
-  repeated RequestUnion failure = 3;
+  repeated RequestOp failure = 3;
 }
 
 message TxnResponse {
@@ -311,7 +311,7 @@ message TxnResponse {
   bool succeeded = 2;
   // responses is a list of responses corresponding to the results from applying
   // success if succeeded is true or failure if succeeded is false.
-  repeated ResponseUnion responses = 3;
+  repeated ResponseOp responses = 3;
 }
 
 // CompactionRequest compacts the key-value store up to a given revision. All superseded keys
diff --git a/etcdserver/quota.go b/etcdserver/quota.go
index 3fb9163ba..088a46962 100644
--- a/etcdserver/quota.go
+++ b/etcdserver/quota.go
@@ -86,7 +86,7 @@ func (b *backendQuota) Cost(v interface{}) int {
 
 func costPut(r *pb.PutRequest) int { return kvOverhead + len(r.Key) + len(r.Value) }
 
-func costTxnReq(u *pb.RequestUnion) int {
+func costTxnReq(u *pb.RequestOp) int {
 	r := u.GetRequestPut()
 	if r == nil {
 		return 0
diff --git a/integration/v3_grpc_test.go b/integration/v3_grpc_test.go
index d90d592b0..1cefdc759 100644
--- a/integration/v3_grpc_test.go
+++ b/integration/v3_grpc_test.go
@@ -157,8 +157,8 @@ func TestV3TxnTooManyOps(t *testing.T) {
 	}
 	addSuccessOps := func(txn *pb.TxnRequest) {
 		txn.Success = append(txn.Success,
-			&pb.RequestUnion{
-				Request: &pb.RequestUnion_RequestPut{
+			&pb.RequestOp{
+				Request: &pb.RequestOp_RequestPut{
 					RequestPut: &pb.PutRequest{
 						Key:   keyf(),
 						Value: []byte("bar"),
@@ -168,8 +168,8 @@ func TestV3TxnTooManyOps(t *testing.T) {
 	}
 	addFailureOps := func(txn *pb.TxnRequest) {
 		txn.Failure = append(txn.Failure,
-			&pb.RequestUnion{
-				Request: &pb.RequestUnion_RequestPut{
+			&pb.RequestOp{
+				Request: &pb.RequestOp_RequestPut{
 					RequestPut: &pb.PutRequest{
 						Key:   keyf(),
 						Value: []byte("bar"),
@@ -202,20 +202,20 @@ func TestV3TxnDuplicateKeys(t *testing.T) {
 	clus := NewClusterV3(t, &ClusterConfig{Size: 3})
 	defer clus.Terminate(t)
 
-	putreq := &pb.RequestUnion{Request: &pb.RequestUnion_RequestPut{RequestPut: &pb.PutRequest{Key: []byte("abc"), Value: []byte("def")}}}
-	delKeyReq := &pb.RequestUnion{Request: &pb.RequestUnion_RequestDeleteRange{
+	putreq := &pb.RequestOp{Request: &pb.RequestOp_RequestPut{RequestPut: &pb.PutRequest{Key: []byte("abc"), Value: []byte("def")}}}
+	delKeyReq := &pb.RequestOp{Request: &pb.RequestOp_RequestDeleteRange{
 		RequestDeleteRange: &pb.DeleteRangeRequest{
 			Key: []byte("abc"),
 		},
 	},
 	}
-	delInRangeReq := &pb.RequestUnion{Request: &pb.RequestUnion_RequestDeleteRange{
+	delInRangeReq := &pb.RequestOp{Request: &pb.RequestOp_RequestDeleteRange{
 		RequestDeleteRange: &pb.DeleteRangeRequest{
 			Key: []byte("a"), RangeEnd: []byte("b"),
 		},
 	},
 	}
-	delOutOfRangeReq := &pb.RequestUnion{Request: &pb.RequestUnion_RequestDeleteRange{
+	delOutOfRangeReq := &pb.RequestOp{Request: &pb.RequestOp_RequestDeleteRange{
 		RequestDeleteRange: &pb.DeleteRangeRequest{
 			Key: []byte("abb"), RangeEnd: []byte("abc"),
 		},
@@ -224,32 +224,32 @@ func TestV3TxnDuplicateKeys(t *testing.T) {
 
 	kvc := toGRPC(clus.RandClient()).KV
 	tests := []struct {
-		txnSuccess []*pb.RequestUnion
+		txnSuccess []*pb.RequestOp
 
 		werr error
 	}{
 		{
-			txnSuccess: []*pb.RequestUnion{putreq, putreq},
+			txnSuccess: []*pb.RequestOp{putreq, putreq},
 
 			werr: rpctypes.ErrGRPCDuplicateKey,
 		},
 		{
-			txnSuccess: []*pb.RequestUnion{putreq, delKeyReq},
+			txnSuccess: []*pb.RequestOp{putreq, delKeyReq},
 
 			werr: rpctypes.ErrGRPCDuplicateKey,
 		},
 		{
-			txnSuccess: []*pb.RequestUnion{putreq, delInRangeReq},
+			txnSuccess: []*pb.RequestOp{putreq, delInRangeReq},
 
 			werr: rpctypes.ErrGRPCDuplicateKey,
 		},
 		{
-			txnSuccess: []*pb.RequestUnion{delKeyReq, delInRangeReq, delKeyReq, delInRangeReq},
+			txnSuccess: []*pb.RequestOp{delKeyReq, delInRangeReq, delKeyReq, delInRangeReq},
 
 			werr: nil,
 		},
 		{
-			txnSuccess: []*pb.RequestUnion{putreq, delOutOfRangeReq},
+			txnSuccess: []*pb.RequestOp{putreq, delOutOfRangeReq},
 
 			werr: nil,
 		},
@@ -276,8 +276,8 @@ func TestV3TxnRevision(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	txnget := &pb.RequestUnion{Request: &pb.RequestUnion_RequestRange{RequestRange: &pb.RangeRequest{Key: []byte("abc")}}}
-	txn := &pb.TxnRequest{Success: []*pb.RequestUnion{txnget}}
+	txnget := &pb.RequestOp{Request: &pb.RequestOp_RequestRange{RequestRange: &pb.RangeRequest{Key: []byte("abc")}}}
+	txn := &pb.TxnRequest{Success: []*pb.RequestOp{txnget}}
 	tresp, err := kvc.Txn(context.TODO(), txn)
 	if err != nil {
 		t.Fatal(err)
@@ -288,8 +288,8 @@ func TestV3TxnRevision(t *testing.T) {
 		t.Fatalf("got rev %d, wanted rev %d", tresp.Header.Revision, presp.Header.Revision)
 	}
 
-	txnput := &pb.RequestUnion{Request: &pb.RequestUnion_RequestPut{RequestPut: &pb.PutRequest{Key: []byte("abc"), Value: []byte("123")}}}
-	txn = &pb.TxnRequest{Success: []*pb.RequestUnion{txnput}}
+	txnput := &pb.RequestOp{Request: &pb.RequestOp_RequestPut{RequestPut: &pb.PutRequest{Key: []byte("abc"), Value: []byte("123")}}}
+	txn = &pb.TxnRequest{Success: []*pb.RequestOp{txnput}}
 	tresp, err = kvc.Txn(context.TODO(), txn)
 	if err != nil {
 		t.Fatal(err)
@@ -320,8 +320,8 @@ func TestV3PutMissingLease(t *testing.T) {
 		// txn success case
 		func() {
 			txn := &pb.TxnRequest{}
-			txn.Success = append(txn.Success, &pb.RequestUnion{
-				Request: &pb.RequestUnion_RequestPut{
+			txn.Success = append(txn.Success, &pb.RequestOp{
+				Request: &pb.RequestOp_RequestPut{
 					RequestPut: preq}})
 			if tresp, err := kvc.Txn(context.TODO(), txn); err == nil {
 				t.Errorf("succeeded txn success. req: %v. resp: %v", txn, tresp)
@@ -330,8 +330,8 @@ func TestV3PutMissingLease(t *testing.T) {
 		// txn failure case
 		func() {
 			txn := &pb.TxnRequest{}
-			txn.Failure = append(txn.Failure, &pb.RequestUnion{
-				Request: &pb.RequestUnion_RequestPut{
+			txn.Failure = append(txn.Failure, &pb.RequestOp{
+				Request: &pb.RequestOp_RequestPut{
 					RequestPut: preq}})
 			cmp := &pb.Compare{
 				Result: pb.Compare_GREATER,
@@ -347,11 +347,11 @@ func TestV3PutMissingLease(t *testing.T) {
 		func() {
 			txn := &pb.TxnRequest{}
 			rreq := &pb.RangeRequest{Key: []byte("bar")}
-			txn.Success = append(txn.Success, &pb.RequestUnion{
-				Request: &pb.RequestUnion_RequestRange{
+			txn.Success = append(txn.Success, &pb.RequestOp{
+				Request: &pb.RequestOp_RequestRange{
 					RequestRange: rreq}})
-			txn.Failure = append(txn.Failure, &pb.RequestUnion{
-				Request: &pb.RequestUnion_RequestPut{
+			txn.Failure = append(txn.Failure, &pb.RequestOp{
+				Request: &pb.RequestOp_RequestPut{
 					RequestPut: preq}})
 			if tresp, err := kvc.Txn(context.TODO(), txn); err != nil {
 				t.Errorf("failed good txn. req: %v. resp: %v", txn, tresp)
@@ -491,13 +491,13 @@ func TestV3TxnInvaildRange(t *testing.T) {
 
 	// future rev
 	txn := &pb.TxnRequest{}
-	txn.Success = append(txn.Success, &pb.RequestUnion{
-		Request: &pb.RequestUnion_RequestPut{
+	txn.Success = append(txn.Success, &pb.RequestOp{
+		Request: &pb.RequestOp_RequestPut{
 			RequestPut: preq}})
 
 	rreq := &pb.RangeRequest{Key: []byte("foo"), Revision: 100}
-	txn.Success = append(txn.Success, &pb.RequestUnion{
-		Request: &pb.RequestUnion_RequestRange{
+	txn.Success = append(txn.Success, &pb.RequestOp{
+		Request: &pb.RequestOp_RequestRange{
 			RequestRange: rreq}})
 
 	if _, err := kvc.Txn(context.TODO(), txn); err != rpctypes.ErrGRPCFutureRev {
@@ -505,7 +505,7 @@ func TestV3TxnInvaildRange(t *testing.T) {
 	}
 
 	// compacted rev
-	tv, _ := txn.Success[1].Request.(*pb.RequestUnion_RequestRange)
+	tv, _ := txn.Success[1].Request.(*pb.RequestOp_RequestRange)
 	tv.RequestRange.Revision = 1
 	if _, err := kvc.Txn(context.TODO(), txn); err != rpctypes.ErrGRPCCompacted {
 		t.Errorf("err = %v, want %v", err, rpctypes.ErrGRPCCompacted)
@@ -584,8 +584,8 @@ func TestV3StorageQuotaAPI(t *testing.T) {
 	}
 
 	// test big txn
-	puttxn := &pb.RequestUnion{
-		Request: &pb.RequestUnion_RequestPut{
+	puttxn := &pb.RequestOp{
+		Request: &pb.RequestOp_RequestPut{
 			RequestPut: &pb.PutRequest{
 				Key:   key,
 				Value: bigbuf,
diff --git a/integration/v3_watch_test.go b/integration/v3_watch_test.go
index 5451c99fd..c2aa51826 100644
--- a/integration/v3_watch_test.go
+++ b/integration/v3_watch_test.go
@@ -676,8 +676,8 @@ func testV3WatchMultipleEventsTxn(t *testing.T, startRev int64) {
 	kvc := toGRPC(clus.RandClient()).KV
 	txn := pb.TxnRequest{}
 	for i := 0; i < 3; i++ {
-		ru := &pb.RequestUnion{}
-		ru.Request = &pb.RequestUnion_RequestPut{
+		ru := &pb.RequestOp{}
+		ru.Request = &pb.RequestOp_RequestPut{
 			RequestPut: &pb.PutRequest{
 				Key: []byte(fmt.Sprintf("foo%d", i)), Value: []byte("bar")}}
 		txn.Success = append(txn.Success, ru)
diff --git a/lease/leasepb/lease.pb.go b/lease/leasepb/lease.pb.go
index 1c03019d0..50fcd37fa 100644
--- a/lease/leasepb/lease.pb.go
+++ b/lease/leasepb/lease.pb.go
@@ -319,13 +319,13 @@ var (
 )
 
 var fileDescriptorLease = []byte{
-	// 117 bytes of a gzipped FileDescriptorProto
+	// 122 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0xce, 0x49, 0x4d, 0x2c,
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-	0xdc, 0x75, 0x00, 0x00, 0x00,
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+	0xff, 0xff, 0x8c, 0x1d, 0x92, 0xdc, 0x75, 0x00, 0x00, 0x00,
 }
diff --git a/mvcc/mvccpb/kv.pb.go b/mvcc/mvccpb/kv.pb.go
index fecd0ba2f..95018d5de 100644
--- a/mvcc/mvccpb/kv.pb.go
+++ b/mvcc/mvccpb/kv.pb.go
@@ -659,23 +659,23 @@ var (
 )
 
 var fileDescriptorKv = []byte{
-	// 274 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x44, 0x90, 0xc1, 0x4a, 0xc3, 0x40,
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-	0x00, 0x00,
+	// 279 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x44, 0x90, 0x41, 0x4a, 0xc3, 0x40,
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+	0x47, 0xcf, 0x26, 0x5a, 0x8b, 0xf0, 0x0b, 0xac, 0x58, 0xe1, 0xae, 0xe6, 0x77, 0x30, 0xac, 0x9b,
+	0x12, 0xa9, 0xed, 0x6c, 0x71, 0x15, 0xe9, 0x35, 0x23, 0x0a, 0xf5, 0x99, 0x34, 0x25, 0x0a, 0x82,
+	0x78, 0x00, 0x46, 0xae, 0xa8, 0xfa, 0x64, 0xe1, 0xf4, 0x68, 0xbf, 0xb7, 0x30, 0x72, 0x15, 0x06,
+	0x70, 0x71, 0xbe, 0xc4, 0x47, 0x60, 0xbe, 0xbe, 0x25, 0xce, 0x80, 0x03, 0xd8, 0x4f, 0xf1, 0x4b,
+	0x9c, 0xc4, 0x0e, 0x7b, 0x74, 0x0f, 0x27, 0x7f, 0x70, 0x3c, 0xf9, 0x83, 0x43, 0xeb, 0xb3, 0x63,
+	0xeb, 0xb3, 0x9f, 0xd6, 0x67, 0x4b, 0x9b, 0xfe, 0xf1, 0xe1, 0x37, 0x00, 0x00, 0xff, 0xff, 0x71,
+	0xd2, 0x34, 0xa9, 0x71, 0x01, 0x00, 0x00,
 }
diff --git a/proxy/grpcproxy/kv.go b/proxy/grpcproxy/kv.go
index bea0da736..0b8f699b3 100644
--- a/proxy/grpcproxy/kv.go
+++ b/proxy/grpcproxy/kv.go
@@ -57,11 +57,11 @@ func (p *kvProxy) Txn(ctx context.Context, r *pb.TxnRequest) (*pb.TxnResponse, e
 	}
 
 	for i := range r.Success {
-		thenops[i] = requestUnionToOp(r.Success[i])
+		thenops[i] = requestOpToOp(r.Success[i])
 	}
 
 	for i := range r.Failure {
-		elseops[i] = requestUnionToOp(r.Failure[i])
+		elseops[i] = requestOpToOp(r.Failure[i])
 	}
 
 	resp, err := txn.If(cmps...).Then(thenops...).Else(elseops...).Commit()
@@ -72,17 +72,17 @@ func (p *kvProxy) Close() error {
 	return p.c.Close()
 }
 
-func requestUnionToOp(union *pb.RequestUnion) clientv3.Op {
+func requestOpToOp(union *pb.RequestOp) clientv3.Op {
 	switch tv := union.Request.(type) {
-	case *pb.RequestUnion_RequestRange:
+	case *pb.RequestOp_RequestRange:
 		if tv.RequestRange != nil {
 			return RangeRequestToOp(tv.RequestRange)
 		}
-	case *pb.RequestUnion_RequestPut:
+	case *pb.RequestOp_RequestPut:
 		if tv.RequestPut != nil {
 			return PutRequestToOp(tv.RequestPut)
 		}
-	case *pb.RequestUnion_RequestDeleteRange:
+	case *pb.RequestOp_RequestDeleteRange:
 		if tv.RequestDeleteRange != nil {
 			return DelRequestToOp(tv.RequestDeleteRange)
 		}
diff --git a/raft/raftpb/raft.pb.go b/raft/raftpb/raft.pb.go
index ca5d3f8db..85aa171f8 100644
--- a/raft/raftpb/raft.pb.go
+++ b/raft/raftpb/raft.pb.go
@@ -1788,51 +1788,52 @@ var (
 )
 
 var fileDescriptorRaft = []byte{
-	// 735 bytes of a gzipped FileDescriptorProto
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+	// 746 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x64, 0x53, 0xc1, 0x6e, 0xdb, 0x38,
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 }
diff --git a/snap/snappb/snap.pb.go b/snap/snappb/snap.pb.go
index 8b23ed652..390356333 100644
--- a/snap/snappb/snap.pb.go
+++ b/snap/snappb/snap.pb.go
@@ -337,13 +337,13 @@ var (
 )
 
 var fileDescriptorSnap = []byte{
-	// 118 bytes of a gzipped FileDescriptorProto
+	// 122 bytes of a gzipped FileDescriptorProto
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 }
diff --git a/wal/walpb/record.pb.go b/wal/walpb/record.pb.go
index e164fdcbf..8777e1d2d 100644
--- a/wal/walpb/record.pb.go
+++ b/wal/walpb/record.pb.go
@@ -501,16 +501,17 @@ var (
 )
 
 var fileDescriptorRecord = []byte{
-	// 175 bytes of a gzipped FileDescriptorProto
+	// 182 bytes of a gzipped FileDescriptorProto
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