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修复一些明显错误 #26

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merged 5 commits into from
Jan 20, 2019
Merged

修复一些明显错误 #26

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abbc3e7
统一为最后写入胜利
yjhmelody Aug 27, 2018
f8378a3
删除多余的内容
yjhmelody Aug 27, 2018
b16a60d
故障转移->故障切换
yjhmelody Aug 27, 2018
c7bdd81
读取修复 -> 读修复
yjhmelody Aug 27, 2018
889e49e
ch5: 修改明显的错误
yjhmelody Aug 27, 2018
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2 changes: 1 addition & 1 deletion ch11.md
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Expand Up @@ -676,7 +676,7 @@ GROUP BY follows.follower_id

​ Storm的Trident基于类似的想法来处理状态【78】。依赖幂等性意味着隐含了一些假设：重启一个失败的任务必须以相同的顺序重放相同的消息（基于日志的消息代理能做这些事），处理必须是确定性的，没有其他节点能同时更新相同的值【98,99】。

​ 当从一个处理节点故障转移到另一个节点时，可能需要进行**防护（fencing）**（参阅“[领导和锁](ch8.md#领导和锁)”），以防止被假死节点干扰。尽管有这么多注意事项，幂等操作是一种实现**恰好一次语义**的有效方式，仅需很小的额外开销。
​ 当从一个处理节点故障切换到另一个节点时，可能需要进行**防护（fencing）**（参阅“[领导和锁](ch8.md#领导和锁)”），以防止被假死节点干扰。尽管有这么多注意事项，幂等操作是一种实现**恰好一次语义**的有效方式，仅需很小的额外开销。

#### 失败后重建状态

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