如题。
它还没有解决什么问题呢？

据说是 paxos 的简化版。

发现不少 软件都用到了 raft算法，比如，
7.x之后的ES，采用-种新的选主算法Raft、Kafka也用 KRaft 了。
TiDB、CockroachDB 也是。

The Raft Consensus Algorithm
https://raft.github.io
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What is Raft?
Raft is a consensus algorithm that is designed to be easy to understand. It's equivalent to Paxos in fault-tolerance and performance.
The difference is that it's decomposed into relatively independent subproblems, and it cleanly addresses all major pieces needed for practical systems.
We hope Raft will make consensus available to a wider audience, and that this wider audience will be able to develop a variety of higher quality consensus-based systems than are available today.
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