In TiDB 3.1 Beta released on Dec 20, 2019, TiDB introduced Follower Read, a highlight open-source feature that lets any follower replica in a Region serve a read request under the premise of strongly consistent reads. This feature improves the throughput of the TiDB cluster and reduces the load on the Raft leader.
Last week, we published a post that guides you through why we introduced Follower Read, how we implement it, and our future plans for it.
The full post is here:
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Infra Meetup No.124 (online) (in Chinese)
Date: February 15th, 2020