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Create release note for Couchbase Server 8.5 - #4234

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RayOffiah wants to merge 1 commit into
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DOC-14228--Create-release-note-for-Totoro-(8.5)
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Create release note for Couchbase Server 8.5#4234
RayOffiah wants to merge 1 commit into
release/8.5from
DOC-14228--Create-release-note-for-Totoro-(8.5)

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@RayOffiah RayOffiah commented Oct 21, 2026

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### Summary

This pull request adds a release note document for Couchbase Server 8.5, including:

- Release date and details (October 2026).
- Fixes and deprecations across Cluster Manager, Data Service, Search Service, XDCR, and backup tools.
- Important updates:
  - Metric renaming: "Cache Miss Ratio" → "Get Miss Ratio".
  - Alert for ephemeral buckets requiring rebalance post-reprovisioning.
  - Deprecation of parameters like `rebalanceMovesPerNode`.
  - Migration of legacy RBAC roles during upgrades.
  - Search service improvements in document counts, partitions, and vector normalization.
  - Enhanced XDCR replication logic and CE-to-CE replication deprecation.
  - Backup tool upgrades for WORM execution and cross-cluster versioning functionality.

### Related Issues

None.

### Checklist

- [ ] Unit tests added or updated (if applicable).
- [ ] Documentation updated (if applicable).
- [ ] Changes adhere to the code standards and guidelines.

@RayOffiah
[DOC-14228]: Create release note for Totoro (8.5)
720107c 
Summarized changes and fixed issues for Couchbase Server 8.5, including:

- Updated release details to reflect October 2026 release date.
- Documented fixes and deprecations across Cluster Manager, Data Service, Search Service, XDCR, and backup tools.
- Notable updates include:
  - Renaming "Cache Miss Ratio" metric to "Get Miss Ratio".
  - Alert for ephemeral buckets requiring rebalance after reprovisioning.
  - Deprecation of outdated parameters like `rebalanceMovesPerNode` and bucket priority in the UI.
  - Migration of legacy RBAC roles during upgrades.
  - Improvements in Search service handling of document counts, vector normalization, and partitions.
  - Enhanced replication logic in XDCR for locked documents and deprecated CE-to-CE replications.
  - Backup tool enhancements for WORM operations and cross-cluster versioning.

Signed-off-by: Ray Offiah <ray.offiah@couchbase.com>
@RayOffiah RayOffiah self-assigned this Oct 21, 2026
@RayOffiah RayOffiah added the enhancement New feature or request label Oct 21, 2026
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