Re: [HTCondor-users] jobs with disjoint requirements

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

On 10/25/2015 8:39 AM, Krieger, Donald N. wrote:
> I have two sets of jobs queued to run:
>
> (1)Jobs for which the requirements _prohibit_ deployment to machines in
> subdomain 123.456 .
>
> (2)Jobs for which the requirements _require_ deployment to machines in
> subdomain 123.456 .
>
> Suppose there are 5000 of the jobs which require 123.456 at the head of
> my queue, either because I’ve set their priority high or because they
> were queued first.
>
> Yet there are no cores available in that subdomain but there are
> machines available outside it.
>
> Will the jobs which prohibit deployment to 123.456 run or do they have
> to wait till all of the jobs ahead of them which require 123.456 are
> running first?

The jobs which prohibit deployment will run; they will not have to wait 
for jobs ahead of them to run first.  HTCondor will eagerly attempt to 
match and run all your jobs.

You can demonstrate this to yourself with a submit file like

  executable = /bin/true
  requirements = false
  queue
  requirements = true
  queue

You should observe that the second queued job will run.

If this is not the behavior you want, i.e. you want your lower priority 
jobs to wait until the higher ones have completed, at first blush I 
think you'd have to use condor_submit_dag (DAGMan).

regards,
Todd