RWTH High Performance Computing (HPC)

We must report that compute nodes within Claix2023, Claix2025 as well as IH and private systems are currently suffering from random operating system failures that cause the jobs to become unavailable and for Jobs to hang while finishing in a completing state.
We know that this causes the waiting times to increase and that users are unable to stop their hanging jobs.
We are currently working on solving the problem with the uttermost priority.

Until the problem is resolved, we will manually stop users jobs in a stuck state and reset the nodes to a usable state manually.
This also takes time and work, so we ask users to please have patience until it is resolved.
To minimize node downtime, we ask users to try and use single node jobs where possible.

We apologize for this inconvenience and hope to have the issue resolved as soon as possible.

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.

Due to scheduled maintenance, the entire CLAIX-2023 and 2025 clusters will be unavailable during the specified maintenance window.
We will be performing upgrades to the file systems of CLAIX2025 to upgrade performance and stability upgrades to the filesystem of CLIAX2023. Claix 2023 might be available sooner before the end of the window.
Login nodes will not be available until later in the maintenance window.
Thank you for your understanding.

Due to maintenance work and debugging, copy23-2 is unavailable at the moment. Please use copy23-1 in the meantime.

During the specified maintenance window, the IT Center will perform maintenance on the MySQL databases used by the Multi-Factor Authentication (MFA) service. As part of the maintenance, the databases will be unavailable for a total of approximately 15 minutes.

During this time, new logins to services using RWTH Single Sign-On will not be possible. Existing sessions will remain active and will not be affected by the maintenance.