On: ClickHouse Keeper: A ZooKeeper alternative written...

[cvccvroomvroom]

Compatible possibly but unproven in production at scale like ZK.

[tylerhannan → cvccvroomvroom]

Definitely used in production ;) and at rather some scale.

It runs thousands of clusters, daily, both in CSP hosted offerings (including our own ClickHouse Cloud) and at customers running the OSS release.

Never accept any claims at face value and always test. But, in this case, it is quite battle-hardened (i.e. the Jepsen tests run 3x daily https://github.com/ClickHouse/ClickHouse/tree/master/tests/j...)

But yes, ZooKeeper is pretty amazing. We are building on the backs of giants.

I'd also argue the RAFT v. ZAB is an important production scale conversation. But, as the blog says, Zookeper is a better option when you require scalability with a read-heavy workload.