The Relationship Between TiFlash and Original Indexes

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

Original topic: tiflash和原索引关系

| username: Running

After enabling TiFlash, are the indexes created by the original TiKV still useful? What impact does it have on query and write operations?

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| username: weixiaobing | Original post link

Yes, TiDB will intelligently choose whether to use TiKV or TiFlash.

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| username: 特雷西-迈克-格雷迪 | Original post link

TiFlash uses a lightweight index called Rough Set Index, which is not related to the index in TiKV.

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| username: system | Original post link

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