{"id":731,"date":"2025-09-17T16:53:05","date_gmt":"2025-09-17T14:53:05","guid":{"rendered":"https:\/\/blog.rwth-aachen.de\/itc-changes\/?p=731"},"modified":"2025-11-06T12:04:54","modified_gmt":"2025-11-06T11:04:54","slug":"slurm-gpu-hpc-resource-allocation-changing-on-the-01-11-2025","status":"publish","type":"post","link":"https:\/\/blog.rwth-aachen.de\/itc-changes\/2025\/09\/17\/slurm-gpu-hpc-resource-allocation-changing-on-the-01-11-2025\/","title":{"rendered":"Slurm GPU HPC resource allocation changing on the 01.11.2025"},"content":{"rendered":"

The CLAIX HPC systems will be changing the way GPU resources are requested and allocated starting on the 01.11.2025.
\nUsers submitting Slurm Jobs will no longer be able to request arbitrary amounts of CPU and Memory resources when using GPUs on GPU nodes.
\nRequesting an entire GPU node’s memory or all CPUs, but only a single GPU will no longer be possible.
\nEach GPU within a GPU node will have a corresponding strict maximum of CPUs and Memory that can be requested.
\nTo obtain more than the strict maximum of CPUs or Memory per GPU, more GPUs will need to be requested too.
\nThe specific limits per GPU on GPU nodes will be eventually documented<\/a> separately.
\nUsers are expected to modify their submission scripts or methods accordingly.<\/p>\n

This change is driven by our efforts to update the HPC resource billing mechanism to comply with NHR HPC directives.
\nNHR requires that computing projects apply for CPU and GPU resources independently.
\nNHR also requires that HPC Centers track the use of these CPU and GPU resources.
\nThe independent resources are then accounted for by Slurm jobs within our CLAIX nodes.
\nTherefore CPU nodes will only track CPUs (and equivalent memory) and GPU nodes will only track GPUs used.
\nThe quota tools<\/a> will eventually reflect this too.<\/p>\n","protected":false},"excerpt":{"rendered":"

The CLAIX HPC systems will be changing the way GPU resources are requested and allocated starting on the 01.11.2025. Users submitting Slurm Jobs will no longer be able to request […]<\/p>\n","protected":false},"author":4929,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"c2c_always_allow_admin_comments":false,"footnotes":""},"categories":[12,1],"tags":[24,18,25],"class_list":["post-731","post","type-post","status-publish","format-standard","hentry","category-allgemein","category-hpc","tag-gpu","tag-hpc","tag-slurm"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t