Hello, We have a recurring situation where some users would like to use idle cluster resources on weekends. Their normal CPU limits prevent this, which is generally desirable during the work week to ensure fair sharing. A pattern we're considering is a special low-priority QOS that allows users to exceed their normal association limits, and that is preemptible by jobs submitted with the normal QOS. The goal is to let heavy users fill otherwise idle nodes over weekends without impacting smaller users when activity picks up again on Monday. The walltime limit (50 hours) is not something we would like to change. Has anyone implemented something similar? If so, I'd be interested in hearing about experiences and any pitfalls to this approach. Thanks, Steen Lysgaard [http://www.dtu.dk/-/media/DTU_Generelt/Andet/mail-signature-logo.png] Steen Lysgaard Scientific Software Developer DTU Energy Mob. +45 51 94 48 86 stly@dtu.dk<mailto:stly@dtu.dk> Agnes Nielsens Vej Building 301 2800 Kgs. Lyngby www.dtu.dk/english<https://www.dtu.dk/english>