Amazon OpenSearch Serverless now supports Derived Source for storage optimization

Amazon OpenSearch Serverless introduces support for Derived Source, a new feature that can help reduce the amount of storage required for your OpenSearch Service collections. With derived source support, you can skip storing source fields and dynamically derive them when required. With Derived Source, OpenSearch Serverless reconstructs the \_source field on the fly using the values already stored in the index, eliminating the need to maintain a separate copy of the original document. This can significantly reduce storage consumption, particularly for time-series and log analytics collections where documents contain many indexed fields. You can enable derived source at the index level when creating or updating index mappings. Derived Source support is available today in all AWS Regions where Amazon OpenSearch Serverless is [supported](https://docs.aws.amazon.com/general/latest/gr/opensearch-service.html). For more information, see the Amazon OpenSearch Serverless [documentation](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/serverless-derived-source.html).