Raft log storage

Hello, I’ve noticed that you are considering migrating raft log storage out of rocksdb: https://github.com/cockroachdb/cockroach/issues/7807. I am wondering how would that scale to have thousands of raft groups per node, and whether you do cross-range WAL batching for performance optimization?

We don’t know yet. We will certainly need to do some sort of cross-range batching of the log writes, but we haven’t settled on a design yet. There will be an RFC when we’ve got something to discuss, so following that issue is the best way to stay up to date.