Shutting Down TiKV Instance, Leader Region Replica Does Not Migrate

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 关闭tikv实例，leader region副本没有发生迁移

| username: TiDBerHailang

I have a question. I am doing an experiment with 3 TiKV instances and 3 replicas. When I shut down one instance, I noticed that the regions on this TiKV instance did not undergo leader migration. Is this normal?

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| username: Raymond | Original post link

It’s normal because you only have 3 TiKV instances. If you add another one, you will see the migration.

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| username: TiDBerHailang | Original post link

Thank you for your reply.

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| username: Kongdom | Original post link

With 3 TiKV instances, if one goes down, to ensure 3 replicas, shouldn’t there be one leader replica on each node, with each node having one leader replica?