RWTH High Performance Computing (HPC)

Due to latent bugs in resource accounting, ssh-ing into nodes where one of your own jobs is running is temporarily disabled.

We are aware of the popularity of this feature and aim to reenable it in a future maintenance.

With the new Rocky 9.8 updates done, we will next deploy cgroups v2 and re-enable ssh into compute nodes. The timeframe for this is still unfortunately unknown.

We are aware of issues submitting Jobs. We are working on a solution.

Das Problem konnte behoben werden.

Teilstörung wurde behoben.

Due to ITC wide network security updates out of our control, the access to HPC login nodes might be interrupted between the times of 9:00 - 13:00.
On very rare cases, jobs might be affected but we do not expect this to be the case.
We will post updates and inform users directly if we notice that their jobs might be affected.

A maintenance for CLAIX-2025 is required to increase the overall performance. The gateways will be reconfigured to use additional network links, and LNet routers will be configured to increase the connection performance to the HPC storage. The OPX Stack will be updated to enable further hardware capabilities of the CN5000 OPA HFIs to overall increase the performance. Depending on the manufacturer's feedback, firmware updates to the fabric components may be installed as well.

The maintenance will also be used to install pending OS updates and perform mandatory reboots.

The gateway reconfiguration will interrupt the operation, hence a maintanence without interruption is not possible.

Due to unforeseen issues, the maintenance needs to be prolonged.

The login nodes are available again. The batch nodes still need to be corrected before being available again.

The GPU partition c25g could be released and is available for batch jobs again. The MPI nodes still take some work.

The batch nodes are available again. Pending minor corrections will be performed during production.

We have enforced the Slurm privacy settings and only personal jobs and settings can be seen now. Exceptions cannot be made

https://blog.rwth-aachen.de/itc-changes/en/2026/08/13/slurm-privacy-rules-enforced/