Is data always written to TiFlash through TiKV Raft?

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

Original topic: 数据写入时，永远都是通过tikv raft 到 tiflash 吗？

| username: atidat

When an OLAP write request is made, after TiDB cost estimation, if the write is executed by TiFlash, will this data be synchronized to TiKV through Raft?
In other words, can the listener synchronize data to the leader and followers?

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| username: ddhe9527 | Original post link

TiFlash does not support writes; all writes are replicated to TiFlash from TiKV via Raft.

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| username: atidat | Original post link

Thank you!

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| username: alfred | Original post link

The current design rule is that TiFlash does not support writes.

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| username: HACK | Original post link

TiFlash is integrated into the TiDB cluster as a Raft learner and only supports queries. Write operations are still performed through TiDB–TiKV.

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| username: system | Original post link

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