Re: [HTCondor-users] TasksMax in default unit file sometimes too low

[Tim Theisen <tim@xxxxxxxxxxx>]

Thank you for the report. I'll have that fixed in the next stable release.

...Tim


On 12/20/2016 02:31 AM, Bert DeKnuydt wrote:
>
> Dear Condor breeders,
>
> I've seen a problem whereby HTCondor runs out of processes on a fat
> machine.
>
> Problem is, that the default unit file 'condor.service' for Systemd
> does not
> specify a value for TasksMax, and the default value is (at least on
> Fedora)
> 512.  TasksMax is the maximum number of processes a daemon can start
> under
> Systemd; useful to prevent fork-bombs.
>
> So if you have a fat machine with say 64 CPUs and dynamic slots, you
> can in the
> worst case only have 512/64 or 8 processes per 1-CPU slot.  That's
> really not
> enough.
>
> So I think that 'TasksMax' should, for HTCondor, be a function of the
> number
> of CPUs configured. I've set it at 32 * nrcpus and everyone is happy
> here.
>
> Midwinter greetings, Bert.
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-- 
Tim Theisen
Release Manager
HTCondor & Open Science Grid
Center for High Throughput Computing
Department of Computer Sciences
University of Wisconsin - Madison
4261 Computer Sciences and Statistics
1210 W Dayton St
Madison, WI 53706-1685
+1 608 265 5736