OpenSearch has introduced Star-Tree Index, a new feature that significantly improves aggregation performance for high-cardinality and multi-dimensional queries. This index pre-aggregates data across configured dimensions and metrics at ingestion time, enabling sub-second response times for frequent aggregations like terms, histogram, and range.
Star-Tree Index is designed for real-time analytics and requires no changes to query syntax; OpenSearch automatically uses the optimized path when supported queries are detected. Early benchmarks show faster aggregation performance on large datasets. This makes it ideal for use cases such as observability, personalization, and time-series dashboards. It works best with append-only data and builds during segment refresh/merge, with minimal impact on ingestion throughput.
Star-Tree Index is available in all regions where OpenSearch 3.1 is supported. The feature is opt-in and can be enabled at index creation time using composite index settings.
Please refer to the AWS Regional Services List for more information about Amazon OpenSearch Service availability. To learn more about Star-Tree Index, see the OpenSearch Documentation
Categories: general:products/amazon-opensearch-service,marketing:marchitecture/analytics
Source: Amazon Web Services
Latest Posts
- Amazon ECS Service Connect enhances observability with Envoy Access Logs
- Amazon S3 Access Grants are now available in additional AWS Regions
- Microsoft 365 Copilot: Introducing Researcher with Computer Use [MC1181726]
- Power Platform admin center – Power Platform inventory is now available in Public Preview [MC1181719]
![(Updated) Manage agent permissions directly in Microsoft Admin Center (MAC) [MC1147969]](https://mwpro.co.uk/wp-content/uploads/2025/06/train-4734116_1920-96x96.webp "(Updated) Manage agent permissions directly in Microsoft Admin Center (MAC) [MC1147969] 7")