关键词: 脑裂, fence, Quorums , epoch
脑裂： 类似 CAP中的P Partition tolerance(分区容错性): 网络分区发生时，一致性和可用性两难全
一. 通用解决方案 #
- Quorums
- Redundant communications，冗余通信的方式
- Fencing
二. 系统 #
| / | 现象 | 解决方案 |
|---|---|---|
| kafka | kafka脑裂现象:1. 存在多个controller 2. consumer的splitBrain |
controller使用epoch来避免脑裂 |
| elastic search | 配置discovery.zen.minimum_master_nodes，类似Quorums | |
| zookeeper | 两个leader[3] | Quorums leader单调递增的epoch |
| raft脑裂 | 两个majority | [2] Quorums + term |
redis脑裂、mysql脑裂
参考: #
- redis 脑裂等极端情况分析
Redis Cluster is not able to guarantee strong consistency. / In general Redis + Sentinel as a whole are a an eventually consistent system
- raft协议 self
- 脑裂是什么？Zookeeper是如何解决的？