Amazon OpenSearch Serverless Introduces Derived Source to Optimize Storage

OpenSearch Serverless adds a feature to reconstruct stored document fields dynamically, reducing storage needs.

By Julian Wells · Editorial pseudonym · 2026-04-13 · 1 min read

AI-ASSISTED REPORTING · RETROSPECTIVE ARCHIVE

Retrospective edition: 2026-04-13. Source published: 2026-04-13. Added to this archive: 2026-11-03. This briefing was prepared later from the linked announcement; it was not published on this website on the historical edition date.

Derived Source allows Amazon OpenSearch Serverless to omit storing the original document _source field by reconstructing it on demand from indexed values, leading to significant storage savings especially for data sets like logs and time-series entries containing many indexed fields.

This feature can be enabled at the index level and is supported across all AWS regions with OpenSearch Serverless, enhancing storage efficiency without sacrificing data retrieval capability.

Source & further reading

Amazon OpenSearch Serverless now supports Derived Source for storage optimization ↗

Source published 2026-04-13. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.