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ByteDance replaces etcd with kubebrain [1], which is backed by their own KV store (TiKV seems also supported).

The single-group raft is the hard limit.

[1]: https://github.com/kubewharf/kubebrain

That's interesting, thanks for the link. I held out high hopes for pluggable KV in kubernetes for the longest time, but since that issue was closed WONTFIX I resigned my hopes

Heh, that kubebrain TODO is some "oh, really?"

* Guarantee consistence in critical cases

but I give them huge props for calling out Jepsen

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