In TiKV clients, data is split into Regions, each storing data for a specific key range. These Regions are distributed among multiple TiKV instances. As data is written into a cluster, millions of or even tens of millions of Regions are created. Too many Regions on a single TiKV instance can bring a heavy burden to the cluster and affect its performance. This article introduces the workflow of Raftstore (a core module of TiKV), explains why a massive amount of Regions affect the performance a...
