# OpenSearch Documentation Website 2.9.0 Release Notes

The OpenSearch 2.9.0 documentation includes the following additions and updates.

## New documentation for 2.9.0

- Change Neural Search plugin from experimental to GA. [#4588](https://github.com/opensearch-project/documentation-website/pull/4588)
- [DOC] Add new property setting fast_double_writer to install documentation  [#4580](https://github.com/opensearch-project/documentation-website/pull/4580)
- Add Spark connector settings [#4577](https://github.com/opensearch-project/documentation-website/pull/4577)
- Add Connectors and ML updates for 2.9 [#4554](https://github.com/opensearch-project/documentation-website/pull/4554)
- Search pipeline GA documentation [#4553](https://github.com/opensearch-project/documentation-website/pull/4553)
- Add documentation for OCSF field mapping and correlation engine API [#4549](https://github.com/opensearch-project/documentation-website/pull/4549)
- Add search pipeline metrics to Nodes Stats API [#4548](https://github.com/opensearch-project/documentation-website/pull/4548)
- [DOC] Add Integrations new documentation [#4546](https://github.com/opensearch-project/documentation-website/pull/4546)
- Add thread level details to the `_tasks` API [#4542](https://github.com/opensearch-project/documentation-website/pull/4542)
- Add document limits to index and bulk pages [#4537](https://github.com/opensearch-project/documentation-website/pull/4537)
- [DOC] Add new cluster metrics monitor supported APIs [#4525](https://github.com/opensearch-project/documentation-website/pull/4525)
- Add geohash, geotile, and geobounds aggregation on geoshapes documentation [#4517](https://github.com/opensearch-project/documentation-website/pull/4517)
- Add documentation for detector rule creation updates [#4499](https://github.com/opensearch-project/documentation-website/pull/4499)
- Add partial flat object documentation [#4477](https://github.com/opensearch-project/documentation-website/pull/4477)
- Add k-NN Faiss filtering documentation [#4476](https://github.com/opensearch-project/documentation-website/pull/4476)
- Add Lucene byte vector documentation [#4475](https://github.com/opensearch-project/documentation-website/pull/4475)
- Adds ZSTD and ZSTD_NO_DICT codecs to core (out of sandbox) [#4421](https://github.com/opensearch-project/documentation-website/pull/4421)
- Adds documentation for REST admin API permissions feature [#4257](https://github.com/opensearch-project/documentation-website/pull/4257)
- Add model access control documentation for ML Commons [#4223](https://github.com/opensearch-project/documentation-website/pull/4223)
- Add documentation to support composite monitors in Alerting [#4127](https://github.com/opensearch-project/documentation-website/pull/4127)

## Documentation for 2.9.0 experimental features

- Add extensions documentation [#4202](https://github.com/opensearch-project/documentation-website/pull/4202)