On 23/09/2015 15:20, "Jesse Becker" <becke...@mail.nih.gov> wrote:
>On Wed, Sep 23, 2015 at 10:56:21AM +0000, Simon Andrews wrote:
>>I?m trying to use RQS to limit the total number of slots which users can
>>take up on our cluster. This is slightly complicated by the hosts being
>>split into two groups, one for batch jobs (@compute) and one for
>>interactive jobs (@interactive). The idea would be that I?d limit the
>>total slots taken up by a user on the @compute set, but not restrict
>>@interactive.
>>
>>The RQS rule I?m using is:
>>
>>{
>> name per_user_slot_limit
>> description "limit the number of slots per user"
>> enabled TRUE
>> limit users {*} hosts {@compute} to slots=16
>>}
>>
>>However I don?t think this is generating the right effect. I think what
>>this is doing is saying that the limit of 16 slots applies on each of
>>the individual members of @compute, and not on the sum of the slots
>>across all of @compute.
>
>I'm guessing that using:
>
> limit users {*} hosts @compute to slots=16
>
>doesn't work?
I think that¹s functionally the same as my previous version, the brackets
aren¹t strictly required in this case.
I think I have a work round which is:
{
name per_user_slot_limit
description "limit the number of slots per user"
enabled TRUE
limit users {*} hosts {@interactive} to slots=16
limit users {*} to slots=16
}
..where the @interactive limit is a no-op since that¹s as many cores as
any of the interactive hosts have. It works because the interactive jobs
hit the first rule, match and then don¹t proceed to the more general rule.
I think it¹s working, but it seems somewhat inelegant and I suspect
there¹s a better way to do this.
Simon.
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