Maintenance Schedule
Anunna maintenance
Maintenance windows allow us to safely perform essential updates and upgrades that cannot be carried out while the cluster is in use. By grouping this work into planned downtimes, we keep Anunna secure, reliable and up to date while minimising unexpected disruption.
Anunna is taken down for planned maintenance — firmware and software updates — roughly twice a year. Typically one downtime is scheduled in April or May and another in October, in a week free of teaching, to disrupt usage as little as possible.
During a downtime the cluster is unavailable. Jobs are not scheduled to run across a planned downtime, so check the announced dates when planning long jobs.
Maintenance schedule
| Scheduled downtime | Date | Planned work | Unavailable services |
|---|---|---|---|
| Autumn 2026 | 12–16 October 2026 | OS patching Lustre upgrade to version 2.17 |
HPC compute Login nodes Web applications Lustre storage |
| Spring 2027 | |||
| Autumn 2027 |
Announcements
Planned maintenance is announced in advance — watch the Message of the Day on the Apps Portal, login nodes and we always send out an announcement in advance over e-mail.
Reporting problems
If something is not working — during or outside maintenance — see How to Get Help.