Vector search algorithm for hybrid search

I was reading the blog post: Unlocking the Power of Hybrid Search - A Deep Dive into Weaviate's Fusion Algorithms | Weaviate - Vector Database
In this, ranked and relative score fusion are explained. Maybe I have read over it, but it did not describe what algorithms were used for vector search. I did find bm25f for index search, but not vector search.

Anybody know what algorithm(s)/ technique(s) are used for vector search during the two mentioned hybrid searches?

Hi @Joey_Visbeen ! Welcome to our community!

You can choose between different options:

Here we have a blog on that (be aware: it’s quite a rabbit hole :joy: ):

This is how you can set that configuration using python client v4:

import weaviate.classes as wvc


Let me know if that helps :slight_smile:

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Thank you, that was the answer I was looking for. I don’t mind a rabbit hole! :grinning:

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