Amazon S3 Vectors metadata pre-filtering is now available in AWS GovCloud (US) Regions

Amazon S3 Vectors Metadata Pre-Filtering Available in AWS GovCloud Regions

Amazon S3 Vectors metadata pre-filtering is now available in the AWS GovCloud (US-East) and AWS GovCloud (US-West) Regions. This feature evaluates metadata filters before running similarity search, returning up to 5x more matching vectors when your filter is selective. Additionally, S3 Vectors introduces a prefix match operator ($startsWith) for filtering on values like paths and URLs, enhancing retrieval-augmented generation (RAG), agentic, and semantic-search applications.

What to do

• Update existing indexes with the UpdateIndexMode API to enable pre-filtering.
• Compare pre-filtering against current filtering using a per-query parameter on QueryVectors.
• Use the AWS CLI, AWS SDKs, or the Amazon S3 console to get started.

Source: AWS release notes

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