[slurm-users] gres.conf and select/cons_res plugin

[Kamil Wilczek]

Hello,

unfortunately imho Slurm's documentation is "scattered".
What I mean is that a single subject is not defined in one place but
described in several places. It is so for cons_tres.

Among others cons_tres allows for individual allocation of
GPUs and other TRES, provides additional submit options to jobs, such
as --gpus, allows for default CPU or memory allocation per GPU, etc.
cons_res allowed only for cores and memory.
This is at least my understading. I ran 19.X and now I'm running 22.05.

See documents below and search for "cons_tres", there are multiple
entries in each document. I remember searching in the whole
manual dozens of times when searching for answers :) :/
And sometimes answers are not quite self-explanatory and confusing.

https://slurm.schedmd.com/gres.html
https://slurm.schedmd.com/slurm.conf.html
https://slurm.schedmd.com/cons_res.html

Kind regards
-- 


W dniu 13.09.2022 o 23:04, Patrick Goetz pisze:
> I think reading the documentation is making me more confused; maybe this 
> has to do with version changes.  My current slurm cluster is using 
> version 17.x
> 
> Looking at the man page for gres.conf 
> (https://slurm.schedmd.com/gres.conf.html)  I see this:
> 
> NOTE: Slurm support for gres/[mps|shard] requires the use of the 
> select/cons_tres plugin.
> 
> On my current (inherited) Slurm cluster we have:
> 
>    SelectType=select/cons_res
> 
> but users are primarily using GPU resources, so I know Gres is working. 
> Why then is select/cons_tres required?
> 

-- 
Kamil Wilczek [https://keys.openpgp.org/]
[6C4BE20A90A1DBFB3CBE2947A832BF5A491F9F2A]
Laboratorium Komputerowe
Wydział Matematyki, Informatyki i Mechaniki
Uniwersytet Warszawski

ul. Banacha 2
02-097 Warszawa

Tel.: 22 55 44 392
https://www.mimuw.edu.pl
https://www.uw.edu.pl
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