Zookeeper系列（3）--Paxos算法的原理及过程透彻理解
https://blog.csdn.net/u013679744/article/details/79222103

basic paxos和fast paxos区别:
https://zhuanlan.zhihu.com/p/44207241

zookeeper选举算法:
https://www.iteye.com/blog/uule-2434027

Zookeeper的三种选举算法:
https://www.jianshu.com/p/ec7b43fb0c9e