https://zhuanlan.zhihu.com/p/35298019
以下博客很重要
https://blog.csdn.net/qq_42968105/article/details/121195108
https://blog.csdn.net/a745233700/article/details/122402303
标签：2PC,csdn,https,分布式系统,3PC,漫话 From： https://www.cnblogs.com/shujiying/p/17090735.html