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new 4056582ea Start draft 4.0 release notes
4056582ea is described below
commit 4056582ea814120c1abf99de25abe19d08c41bdc
Author: Christopher Tubbs <[email protected]>
AuthorDate: Fri Oct 2 12:47:23 2026 -0400
Start draft 4.0 release notes
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+---
+title: Apache Accumulo 4.0.0
+sortableversion: '04.00.001'
+draft: true
+LTM: false
+---
+
+## About
+
+Apache Accumulo 4.0.0 is a non-LTM major version release that contains
+a large number of internal changes that allow a lot of flexibility in
+the way that Accumulo is deployed with a small number of API changes.
+A high level overview of some of the changes are described in [this][blog]
+blog post.
+
+## User Guide
+
+The 4.x user guide, located [here][4docs], is being updated. It will be in
+draft state until the final 4.0.0 release.
+
+## Notable Changes
+
+* Some change here
+
+## Known Issues
+
+* None
+
+## Upgrading
+
+View the [Upgrading Accumulo documentation][upgrade] for guidance as
+the upgrade procedure has changed. Note that during the upgrade
+all user tablets will be set to have on-demand tablet availability.
+Users will need to change the tablet availability post-upgrade for
+tablets that they want always or never hosted on a tablet server.
+The upgrade process also sets the tablet mergeability to never for
+all existing tablets to preserve any user created split points.
+Tablet mergeability can be set when adding new splits and will be
+set to always when the split is created by the system based on user
+settings.
+
+## Useful Links
+
+* [All tickets related to this release][milestone]
+* See also [all tickets related to the 4.0.0-alpha-1 release][milestone-alpha]
+
+
+[blog]: /blog/2024/10/07/accumulo4-preview.html
+[4docs]: /docs/4.x
+[merge]: /docs/4.x/administration/merging
+[upgrade]: /docs/4.x/administration/upgrading
+[milestone]: https://github.com/apache/accumulo/milestone/25
+[milestone-alpha]: https://github.com/apache/accumulo/milestone/20
