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# OpenSearch Documentation Website 2.8.0 Release Notes
The OpenSearch 2.8.0 documentation includes the following additions and updates.
## New documentation for 2.8.0
- Add cross-cluster search documentation [#4226](https://github.com/opensearch-project/documentation-website/pull/4226)
- Add backend documentation about configuring ISM notifications [#4210](https://github.com/opensearch-project/documentation-website/pull/4210)
- Add segment replication cluster-level setting [#4209](https://github.com/opensearch-project/documentation-website/pull/4209)
- Add documentation for Security Analytics UI updates for 2.8 [#4208](https://github.com/opensearch-project/documentation-website/pull/4208)
- Add refresh, flush, clear cache, and notifications documentation for index management in Dashboards [#4207](https://github.com/opensearch-project/documentation-website/pull/4207)
- Add segment replication upgrade changes for 2.8 [#4187](https://github.com/opensearch-project/documentation-website/pull/4187)
- Add documentation for validating JWT with JWKS [#4162](https://github.com/opensearch-project/documentation-website/pull/4162)
- Document how to configure XContent parsing constraints [#4154](https://github.com/opensearch-project/documentation-website/pull/4154)
- Add documentation to support SigV4 serverless service as a data source connection for Dashboards [#4147](https://github.com/opensearch-project/documentation-website/pull/4147)
- Add new parameter to Clear Index Cache API [#4132](https://github.com/opensearch-project/documentation-website/pull/4132)
- Add the preference query parameter options [#4099](https://github.com/opensearch-project/documentation-website/pull/4099)
- Introduce new 'unsigned_long' numeric field type support [#3585](https://github.com/opensearch-project/documentation-website/pull/3585)
## Documentation for 2.8.0 experimental features
- Add remote store backpressure and API documentation [#4215](https://github.com/opensearch-project/documentation-website/pull/4215)
- Add search pipeline documentation [#4204](https://github.com/opensearch-project/documentation-website/pull/4204)