AMAZON S3 VECTORS NOW SUPPORTS METADATA PRE-FILTERING FOR HIGHER RECALL ON FILTERED SEARCHES

Summary from the TLDR DevOps newsletter

AWS has introduced metadata pre-filtering for Amazon S3 Vectors to improve recall on filtered queries. The feature evaluates metadata filters before running a similarity search and supports up to 100 filter constraints per query. On highly selective filters, pre-filtering returns up to five times more matching vectors than previous methods. It is available immediately at no additional cost and works on existing indexes without requiring data re-ingestion.