[emirozer]

It's based on Raft : https://github.com/coreos/etcd/tree/master/raft

https://raft.github.io/

[philips]

We also do a ton of functional testing as code is merged to test lots of different partitions and faults. You can read more on this post: https://coreos.com/blog/new-functional-testing-in-etcd/