How to verify elasticsearch index store?

Hi, All
I use mmapfs to write data, but I want to change to niofs, need to rewrite the data? Then how to view

No, there's no need to rewrite the data when changing store type.

It is an index-level setting so you can view it using the index settings API.

Thanks David for your quick response!
after adding ' niofs' to the config/elasticsearch.yml .How can I confirm that it has changed?

GET _nodes/settings returns the static settings applied on each node.

thanks for you reply!

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