Comments (2)
比如初始状态: A, B, C 三台机器,A 是 master,都有数据 val = null
- 客户端请求 val = 123
- A,B 两台机都成功 accept/写入数据成功, C 机异常
- 此时 A, B 两机的数据是 val = 123,C 机 val = null
- A 机发生异常离线,重新选主后新 master 是 C 机
- 客户端马上请求读取 val 的值,读取到 C 机存储的 val = null
实际上 val 应该读到是 123,这种情况下会得到 val = null,一个比较旧的值?
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选主也是一个 basic paxos 的过程,当一台机能完成一次 basic paxos,那说明这台机的数据已经是最新的了。
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Related Issues (20)
- checkpoint机制是不是与多个group不好同时采用?因为多个group的话,每个group都有自己的镜像数据,新机器加入的话,难道每个group都要从旧机器接收镜像追赶进度,而每个group学完都会退出进程 HOT 2
- 请问batch propose 2KB 15W,压测条件为单条数据2KB再进行一定量的合并吗? HOT 2
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