[slurm-users] declare availability of up to 8 cores//job

[Adrian Sevcenco]

On 8/2/21 7:35 PM, Paul Edmon wrote:
>  From that page:
> 
> *GrpTRES=* The total count of TRES able to be used at any given time from jobs running from an association and its 
> children or QOS. If this limit is reached new jobs will be queued but only allowed to run after resources have been 
> relinquished from this group.
> 
> So basically its the sum total of all the TRES a Group could run in a partition at one time.
oh, now i get it .. while the MaxTRESPERJob had the per_job suffix
the Grp one, instead of per_group or something have the grp prefix .. a little bit confusing i would say..

if i got it right, i think that this would work something like : on a user with 50 jobs limit and a max of 4 cores per 
job i can establish an envelope like GrpTRES=cpu=200 and the user will have the freedom to
use up to 200 cores in the same time, either as 200 1-cpu jobs, or as a 1 200-cpu job.

Thanks a lot for info!
Adrian


> 
> -Paul Edmon-
> 
> On 8/2/2021 12:05 PM, Adrian Sevcenco wrote:
>> On 8/2/21 6:26 PM, Paul Edmon wrote:
>>> Probably more like
>>>
>>> MaxTRESPERJob=cpu=8
>>
>> i see, thanks!!
>>
>> i'm still searching for the definition of GrpTRES :)
>>
>> Thanks a lot!
>> Adrian
>>
>>
>>>
>>> You would need to specify how much TRES you need for each job in the normal tres format.
>>>
>>> -Paul Edmon-
>>>
>>> On 8/2/2021 11:24 AM, Adrian Sevcenco wrote:
>>>> On 8/2/21 5:44 PM, Paul Edmon wrote:
>>>>> You can set up a Partition based QoS that can set this limit: https://slurm.schedmd.com/resource_limits.html  See 
>>>>> the MaxTRESPerJob limit.
>>>> oh, thanks a lot!!
>>>>
>>>> would something like this work/be in line with your indication? :
>>>>
>>>> add qos 8cpu GrpTRES=cpu=1 MaxTRESPerJob=8
>>>>
>>>> modify account blah DefaultQOS=8cpu
>>>>
>>>>
>>>> Thanks a lot!
>>>> Adrian
>>>>
>>>>>
>>>>> -Paul Edmon-
>>>>>
>>>>>
>>>>> On 8/2/2021 10:40 AM, Adrian Sevcenco wrote:
>>>>>> Hi! Is there a way to declare that jobs can request up to 8 cores?
>>>>>> Or is it allowed by default (as i see no limit regarding this .. ) .. i just have MaxNodes=1
>>>>>> this is CR_CPU alocator
>>>>>>
>>>>>> Thank you!
>>>>>> Adrian
>>>>>>
>>>>>>
>>>>>
>>>>