View source for Ubuntu24.04

== Ubuntu 24.04 Upgrade ==

We are upgrading Anunna to Ubuntu 24.04. This page provides details about the upgrade schedule and how you can test your workloads on the new OS.

=== Upgrade Timeline ===
{| class="wikitable"
! Date !! Event !! Details
|-
| 24 March 2025 || Ubuntu 24.04 partitions available || Some compute nodes will be running Ubuntu 24.04 and are ready for testing.
|-
| 31 March 2025 || <code>login200</code> upgrade || <code>login200</code> will be upgraded to Ubuntu 24.04, while <code>login201</code> remains on Ubuntu 20.04 for a while, as fallback option.
|-
| 1 April 2025 || Gradual transition || More nodes will be added to <code>main_24</code> and <code>gpu_24</code> partitions while reducing the regular <code>main</code> and <code>gpu</code> partitions.
|-
| '''8-9 May 2025''' || '''Downtime''' || Most nodes will be upgraded to Ubuntu 24.04, in the regular <code>main</code> parition. Making it the default OS. New fallback partitions <code>main_20</code> and <code>gpu_20</code> will be created as fallback option on Ubuntu 20.04.
|-
| End of May 2025 || Full migration || The last Ubuntu 20.04 nodes and the will be removed, as well as the <code>main_20</code> and <code>gpu_20</code> partitions, completing the transition to Ubuntu 24.04.
|}

=== Overview ===
All nodes will be upgraded to Ubuntu 24.04. We have the software images ready and are currently testing them. The most important testing however comes from our users: please try out if your jobs and your modules still work as expected on Ubuntu 24.04.

New Slurm partitions have been created for Ubuntu 24.04:
* <code>main_24</code> for CPU workloads
* <code>gpu_24</code> for GPU workloads

To use these partitions, add <code>--partition=main_24</code> for CPU jobs and <code>--partition=gpu_24</code> for GPU jobs in your Slurm job submissions. Please test your workflows and report any issues by filing a support ticket with "Ubuntu 24" in the title.

==== Software Environment ====
Anunna uses [[Modules|EasyBuild]] to manage software modules. Most software should work as expected, but some applications may break due to differences between Ubuntu 20.04 and 24.04. This could be due to:
* Changes in system libraries
* Updates in compilers and dependencies
* Removal of outdated packages

We recommend you to test your workflows on the new partitions and verify that all required software modules load and function correctly.


=== Reporting Issues ===
If you experience any issues during the transition, please file a support ticket and include "Ubuntu 24" in the title to help us identify and address problems efficiently. Please include details of the issue, specifying the broken software and error messages encountered, and what modules you had loaded at the time of error.