How to config hot-warm arch in elasticsearch 7.9.1

Configurations of hot-warm arch in elasticsearch is only changing elasticsearch.yml?

Yes that is correct.

Thank You! :grinning: :grinning:

If I config a node as a hot node or warm node, does it affect shards in each node?
and = true for the hot, warm node of the only hot node or only warm node?

If impacts shards if you assign allocation filtering to the indices, yes.

Yes, the nodes needs to be data nodes.

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