【大话IT】由一系列云服务故障事件，我所想到的。。。。。

forgaoqiang

脑裂 （脑列） 什么输入法输入的 。。。。

What does "split-brain" mean?

"Split brain" is a condition whereby two or more computers or groups of computers lose contact with one another but still act as if the cluster were intact. This is like having two governments trying to rule the same country. If multiple computers are allowed to write to the same file system without knowledge of what the other nodes are doing, it will quickly lead to data corruption and other serious problems.

“脑裂”是这么一个情况，一个集群中的两个或者多个电脑失去了和其它电脑的联系，于是他们就尝试自主工作。这就像两个政府管理一个国家一样。如果多个电脑都允许写相同的文件系统，但是又不知道其它的节点也在瞎搞，很快就会出现数据崩溃和其它的严重问题。

Split-brain is prevented by enforcing quorum rules (which say that no group of nodes may operate unless they are in contact with a majority of all nodes) and fencing (which makes sure nodes outside of the quorum are prevented from interfering with the cluster).

forgaoqiang

这好像也没有解决脑裂问题吧 如果master和其它主机失去联系 但是master扔在工作 其它机器又选出来master 那么是不是brain split 了~

niao5929 发表于 2016-08-08 12:29
现代集群系统更多的使用选举算法进行MASTER选举。当MASTER宕机，集群会重新进行MASTER的选举来保证集群系统 ...