[DOC] Confirmation in the docs that index sorting is supported

[calebmer]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request.

On the index settings page of the documentation there is no mention of the index.sort.* settings. They were introduced in ElasticSearch 6.0 (“Introducing Index Sorting”) so OpenSearch should have it. Also in the OpenSearch repository there’s code referencing this feature.

I haven’t tested yet but I hope index.sort.* would be available since it will definitely help index performance for my use case. It would be comforting to see some reference of these settings in the docs if they are indeed supported.

What other resources are available?

• https://www.elastic.co/blog/index-sorting-elasticsearch-6-0
• https://www.elastic.co/guide/en/elasticsearch/reference/8.9/index-modules-index-sorting.html
• https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/index/IndexSortConfig.java#L74-L117