# The RRF retriever could use a weighting option

**URL:** <https://discuss.elastic.co/t/the-rrf-retriever-could-use-a-weighting-option/378182>\
**Category:** Elasticsearch\
**Tags:** vector-search\
**Created:** [May 15, 2025, 1:45pm UTC](https://discuss.elastic.co/t/the-rrf-retriever-could-use-a-weighting-option/378182 "2025-05-15T13:45:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jan.stap](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jan.stap/32/97404_2.png) [@jan.stap](https://discuss.elastic.co/u/jan.stap)\
**Post date:** [May 15, 2025, 1:45pm UTC](https://discuss.elastic.co/t/the-rrf-retriever-could-use-a-weighting-option/378182/1 "2025-05-15T13:45:53Z")

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Hi!

I would like to combine a multi\_match query with two kNN queries. For that I use the RRF retriever, which itself uses a Standard retriever and two kNN retrievers. This works fine, but I have no option to add weighting on each of the three child retrievers, like the Linear retriever provides.

Is this functionality planned for the RRF retriever?

Alternatively, I could imagine a Compound retriever (suggested name), copying the Linear one and replacing both the Linear and RRF retrievers. It would get a new RRF-type normalizer, next to the existing "none" and "minmax" ones, any possibly others in the future. Just a thought.

Thanks!

Jan Stap

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**Author:** ![mayya](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mayya/32/83147_2.png) [@mayya](https://discuss.elastic.co/u/mayya)\
**Post date:** [August 12, 2025, 1:45pm UTC](https://discuss.elastic.co/t/the-rrf-retriever-could-use-a-weighting-option/378182/2 "2025-08-12T13:45:39Z")

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How would you imagine RRF retriever to use weights?

For RRF retriever raw scores in individual child retriever don’t matter, just their order.

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**Author:** ![Kathleen\_DeRusso](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kathleen_derusso/32/132039_2.png) [@Kathleen\_DeRusso](https://discuss.elastic.co/u/Kathleen_DeRusso)\
**Post date:** [August 12, 2025, 2:19pm UTC](https://discuss.elastic.co/t/the-rrf-retriever-could-use-a-weighting-option/378182/3 "2025-08-12T14:19:06Z")

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Good news - supported for weighted RRF will be coming in a future release - see the [PR](https://github.com/elastic/elasticsearch/pull/130658)