Re: [HTCondor-users] Group and Sub-Group Quotas

[William Strecker-Kellogg <willsk@xxxxxxx>]

Hi,

Unless something changed, I think a pslot match will grab the entire
machine (assuming you are using whole-machine or otherwise large pslots)
-- violating a group's quota. If your pool's node-count is not
significantly larger than the number of slots / CPUs on each node this
situation may occur.

Will

On 08/02/2017 04:42 PM, Jaime Frey wrote:
>> On Jul 28, 2017, at 3:23 PM, condor <condor@xxxxxxx
>> <mailto:condor@xxxxxxx>> wrote:
>>
>> Hello â
>>  
>> I was under the impression that sub group quotas make use of a
>> fraction of a [super] group. Meaning, if I have the following pseudo
>> configuration:
>>  
>> Dynamic quota group A:         0.5
>>             Quota group A.sys      0.5
>>             Quota group A.net <http://a.net/>      0.5
>> Dynamic quota group B:         0.5
>>             Quota group B.sys      0.5
>>             Quota group B.net <http://b.net/>      0.5
>>  
>> âthen all jobs where acctgroup ~= A (including A, A.sys, and A.net
>> <http://a.net/>) get 50% of the pool slots. Likewise, each job with
>> the acctgroup set to a subgroup (A.sys, A.net <http://a.net/>, B.sys,
>> and B.net <http://b.net/>) each get 25% of the pool slots. It looks
>> like in our case, according to condor_userprio and analyzing running
>> jobs with condor_q, that every super and sub group gets 50% of the
>> poolâs slots. I believe we started seeing this behavior after we
>> introduced pslots into the mix, but that may just be a coincidence.
>>  
>> Is this a known bug? Or am I doing something wrong? I can send a
>> config snippet if needed.
> 
> Your impression is correct. A group with a fractional quota gets that
> fraction of the parent groupâs quota (and not that fraction of the
> entire pool).
> I just ran a quick test on my personal condor pool, and it worked as
> expected. Each of my subgroups (e.g. A.sys and A.net <http://A.net>) was
> only allowed to claim 25% of the slots in the pool. condor_userprio
> reported their quotas as 0.5, which is their configured values (fraction
> of parent group), and not a computed value of their share of the entire
> pool.
> 
> I had GROUP_ACCEPT_SURPLUS or GROUP_AUTOREGROUP disabled. If you have
> them enabled, that will allow groups to go over their quotas in many
> situations.
> 
> Thanks and regards,
> Jaime Frey
> UW-Madison HTCondor Project
> 
> 
> 
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