https://github.com/brpc/braft/blob/master/docs/cn/raft_protocol.md
https://github.com/maemual/raft-zh_cn/blob/master/raft-zh_cn.md
https://zhuanlan.zhihu.com/p/42239873 https://cn.pingcap.com/blog/lease-read TIKV线性一致性读 https://zhuanlan.zhihu.com/p/27869566 https://zhuanlan.zhihu.com/p/25367435
https://www.sofastack.tech/projects/sofa-jraft/counter-example/ https://www.sofastack.tech/projects/sofa-jraft/jraft-user-guide/