[slurm-users] Simple free for all cluster

[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 <jsh at 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
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