Raft

Raft is now one of the widely used consensus algorithms. For example it is used in Etcd (link to the established systems) and TiKV.

The animated introduction is here should be checked first, and after that the article.

Key takeaways

• we should try to merge results from equal peers (like in Paxos?), it is much more simplier to elect a leader and make it responsible for the state changes
• a modular design: separate leader election, log replication, safety and membership changes

Consider Raft critique (e.g. openraft repo)