[slurm-users] Billing issue

[Bas van der Vlies]

On Thu, 2020-08-06 at 09:30 -0400, Paul Raines wrote:
> Bas
> 
> Does that mean you are setting PriorityFlags=MAX_TRES ?
> 
YES

> Also does anyone understand this from the slurm.conf docs:
> 
>    The weighted amount of a resource can be adjusted by adding a suffix of
>    K,M,G,T or P after the billing weight. For example, a memory weight of
>    "mem=.25" on a job allocated 8GB will be billed 2048 (8192MB *.25) units. A
>    memory weight of "mem=.25G" on the same job will be billed 2 (8192MB *
>    (.25/1024)) units.
> 
> Where is this "2048" and "2" factor coming from in those two calculations?
> 
job is using 8G --> 0.25 * 8192 = 2048 
with .25G ---)  .25/1024M --> 8192 * 0.25/1024 = 2

Memory is always a factor 1024

> On Thu, 6 Aug 2020 6:46am, Bas van der Vlies wrote:
> 
> > Il 06/08/20 10:00, Bas van der Vlies ha scritto:
> > 
> > Tks for the answer.
> > 
> > > > We have also node with GPU's (dfiferent types) and some cost more the
> > > > others.
> > > The partitions always have the same type of nodes not mixed,eg:
> > >  *
> > > TRESBillingWeights=CPU=3801.0,Mem=502246.0T,GRES/gpu=22807.0,GRES/gpu:tita
> > > nrt
> > > x=22807.0
> > >  * node type: 24 cores 4 GPU's  MemSpecLimit=1024 Memory=191488
> > >  * the max is 91228 SBU
> > Still missing something. Can't come to your result.
> > 24*3801+502246*(191488-1024)/(1024**5)+4*22807 = 182452 (rounded), about
> > twice your result.
> > 
> > we have MAX(core, mem, gres). all resources can have the score: 91228
> >  24 * 3801 = 91224
> >  mem same value
> >  4 gres * 22807 = 91228
> > 
> > So we take one of these maximum values we dived it again by 1000 and round
> > it. Hopefully this explains it.
> > 
> > DIFA - Dip. di Fisica e Astronomia
> > Servizi Informatici
> > Alma Mater Studiorum - Università di Bologna
> > V.le Berti-Pichat 6/2 - 40127 Bologna - Italy
> > tel.: +39 051 20 95786
> > 
> > 
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