Hi Jason, we intend to have a maximum wallclock time of 5 days. We chose this, to have the possibility to do a timely maintenance without disturbing and killing the users jobs. Yet we see that some users and / or codes need a longer runtime. That is why we set the maxtime for the partitions to 30 days. Our users must write a proposal if they need a larger amount of core hours. There they have to justify why they need a longer runtime than 5 days. This maxtime is limited by the association created for the triple (account,user,partition). When we need to do a timely maintenance, we kill such long running jobs. Our users know that.
Our default time is set to 15 minutes. Best Marcus Am 06.10.2020 um 16:53 schrieb Jason Simms:
FWIW, I define the DefaultTime as 5 minutes, which effectively means for any "real" job that users must actually define a time. It helps users get into that habit, because in the absence of a DefaultTime, most will not even bother to think critically and carefully about what time limit is actually reasonable, which is important for, e.g., effective job backfill and scheduling estimations. I currently don't have a MaxTime defined, because how do I know how long a job will take? Most jobs on my cluster require no more than 3-4 days, but in some cases at other campuses, I know that jobs can run for weeks. I suppose even setting a time limit such as 4 weeks would be overkill, but at least it's not infinite. I'm curious what others use as that value, and how you arrived at it. Warmest regards, Jason On Tue, Oct 6, 2020 at 5:55 AM John H <j...@sdf.org <mailto:j...@sdf.org>> wrote: Yes I hadn't considered that! Thanks for the tip, Michael I shall do that. John On Fri, Oct 02, 2020 at 01:49:44PM +0000, Renfro, Michael wrote: > Depending on the users who will be on this cluster, I'd probably adjust the partition to have a defined, non-infinite MaxTime, and maybe a lower DefaultTime. Otherwise, it would be very easy for someone to start a job that reserves all cores until the nodes get rebooted, since all they have to do is submit a job with no explicit time limit (which would then use DefaultTime, which itself has a default value of MaxTime). > -- *Jason L. Simms, Ph.D., M.P.H.* Manager of Research and High-Performance Computing XSEDE Campus Champion Lafayette College Information Technology Services 710 Sullivan Rd | Easton, PA 18042 Office: 112 Skillman Library p: (610) 330-5632
-- Dipl.-Inf. Marcus Wagner IT Center Gruppe: Systemgruppe Linux Abteilung: Systeme und Betrieb RWTH Aachen University Seffenter Weg 23 52074 Aachen Tel: +49 241 80-24383 Fax: +49 241 80-624383 wag...@itc.rwth-aachen.de www.itc.rwth-aachen.de Social Media Kanäle des IT Centers: https://blog.rwth-aachen.de/itc/ https://www.facebook.com/itcenterrwth https://www.linkedin.com/company/itcenterrwth https://twitter.com/ITCenterRWTH https://www.youtube.com/channel/UCKKDJJukeRwO0LP-ac8x8rQ
smime.p7s
Description: S/MIME Cryptographic Signature
