| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| syntax = "proto2"; |
| package kudu.consensus; |
| |
| option java_package = "org.apache.kudu.consensus"; |
| |
| // Communicates replica management information between servers. |
| message ReplicaManagementInfoPB { |
| // Replica replacement schemes. |
| enum ReplacementScheme { |
| UNKNOWN = 999; |
| |
| // The leader replica evicts the failed replica first, and then the new |
| // voter replica is added (a.k.a. '3-2-3' replica management scheme). |
| EVICT_FIRST = 0; |
| |
| // Add a new non-voter replica, promote the replica to voter once it |
| // caught up with the leader, and only after that evict the failed replica |
| // (a.k.a. '3-4-3' replica managment scheme). |
| PREPARE_REPLACEMENT_BEFORE_EVICTION = 1; |
| } |
| |
| // Using 'optional' instead of 'required' because at some point we may decide |
| // to obsolete this field. |
| optional ReplacementScheme replacement_scheme = 1; |
| } |