Follower Read is a highlight open-source feature that improves the throughput of the TiKV clients and reduces the load on the Raft leader. To understand how important this feature is, you’ll need a bit of background. TiKV stores data in basic units called Regions. Multiple replicas of a Region form a Raft group. When a read hotspot appears in a Region, the Region leader can become a read bottleneck for the entire system.
