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OpenSearch version | Release highlights | Release date :--- | :--- | :--- | :--- 1.2.0 | Adds observability, new attribution ratio API for Anomaly Detection, shard-level indexing back-pressure, new "match" query type for SQL and PPL, support for Faiss libraries in k-NN, and custom Dashboards branding. | 23 November 2021 1.1.0 | Adds cross-cluster replication, security for Index Management, bucket-level alerting, a CLI to help with upgrading from Elasticsearch OSS to OpenSearch, and enhancements to high cardinality data in the anomaly detection plugin. | 5 October 2021 1.0.1 | Bug fixes. | 1 September 2021 1.0.0 | General availability release. Adds compatibility setting for clients that require a version check before connecting. | 12 July 2021 1.0.0-rc1 | First release candidate. | 7 June 2021 1.0.0-beta1 | Initial beta release. Refactors plugins to work with OpenSearch. | 13 May 2021