System status

Please note: this is a manually updated message.

We will try to update this message when we have major user-visible problems on any of our systems. We also provide information via email to all users of affected systems (via the somesystemname-users@lists.nsc.liu.se mailing lists).

If something is not working, please don’t hesitate to contact us even if this message says that everything is working! Sometimes we forget to update this page when we’re busy investigating a major problem…

Times and dates are in local time (CET/CEST) unless stated otherwise.

Ongoing

• None

Future planned maintenance

• None

Recently resolved problems and planned maintenance

• 2025-09-23 from 09:00 CEST to 10:45 CEST: Berzelius unavailable due to system updates. See this email for details
• 2025-09-14 from 03:10 CEST to 11:30 CEST: Berzelius compute nodes unavailable and all running jobs killed, due to cooling failure in the computer room.
• 2025-09-14 from 03:10 CEST to 12:30 CEST: Nebula compute nodes unavailable and all running jobs killed, due to cooling failure in the computer room.
• 2025-09-12 from 09:00 CEST: Berzelius login nodes unavailable due to urgent security updates. See this email for details
• 2025-09-09 from approximately 15:00 CEST: Reboot of Tetralith login nodes due to an urgent security update. At least one login available at all times.
• 2025-09-09 from approximately 15:00 CEST: Reboot of Sigma login node due to an urgent security update. Not possible to login to Sigma while this is ongoing. Duration 30-60 minutes.
• 2025-09-04 from 07:00 CEST: Tetralith login nodes rebooted, one at a time. At least one login available at all times. See this email for details
• 2025-09-04 from 08:00-08:39 CEST: The Sigma login node rebooted. See this email for details
• 2025-08-11 from 10:00 CEST until 2025-08-12T17:59: Downtime for Nebula due to electrical work. Prolonged due to a network equipment failure.
• 2025-08-11 from 10:00 CEST until 2025-08-12T17:35: Downtime for Arcus due to electrical work. Prolonged due to a network equipment failure.
• 2025-08-11 from 10:00 CEST until 19:30 CEST: Downtime for Berzelius due to electrical work.

Queue system status

An overview of the overall system load is available on the status page.

Graphical representations of the current queue on some of our systems:

• Tetralith
• Sigma
• Freja