{"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\/en\/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":"<p>The CLAIX HPC systems will be changing the way GPU resources are requested and allocated starting on the 01.11.2025.<br \/>\nUsers submitting Slurm Jobs will no longer be able to request arbitrary amounts of CPU and Memory resources when using GPUs on GPU nodes.<br \/>\nRequesting an entire GPU node&#8217;s memory or all CPUs, but only a single GPU will no longer be possible.<br \/>\nEach GPU within a GPU node will have a corresponding strict maximum of CPUs and Memory that can be requested.<br \/>\nTo obtain more than the strict maximum of CPUs or Memory per GPU, more GPUs will need to be requested too.<br \/>\nThe specific limits per GPU on GPU nodes will be eventually <a href=\"https:\/\/help.itc.rwth-aachen.de\/service\/rhr4fjjutttf\/article\/9108f4a6f43c40a3a168919afd36839d\/\">documented<\/a> separately.<br \/>\nUsers are expected to modify their submission scripts or methods accordingly.<\/p>\n<p>This change is driven by our efforts to update the HPC resource billing mechanism to comply with NHR HPC directives.<br \/>\nNHR requires that computing projects apply for CPU and GPU resources independently.<br \/>\nNHR also requires that HPC Centers track the use of these CPU and GPU resources.<br \/>\nThe independent resources are then accounted for by Slurm jobs within our CLAIX nodes.<br \/>\nTherefore CPU nodes will only track CPUs (and equivalent memory) and GPU nodes will only track GPUs used.<br \/>\nThe <a href=\"https:\/\/help.itc.rwth-aachen.de\/service\/rhr4fjjutttf\/article\/f37ad962ddce4790925ffc45d8a5a90f\/\">quota tools<\/a> will eventually reflect this too.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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 [&hellip;]<\/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":[],"_links":{"self":[{"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/posts\/731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/users\/4929"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/comments?post=731"}],"version-history":[{"count":4,"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/posts\/731\/revisions"}],"predecessor-version":[{"id":987,"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/posts\/731\/revisions\/987"}],"wp:attachment":[{"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/media?parent=731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/categories?post=731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/itc-changes\/en\/wp-json\/wp\/v2\/tags?post=731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}