Re: [Condor-users] Defusing a Condor bomb?

[Chris Green <greenc@xxxxxxxx>]

On Wed, 26 Oct 2005, Matt Hope wrote:

> On 10/26/05, Chris Green <greenc@xxxxxxxx> wrote:
<snip>
> > Is there some way to throttle the frequency at which jobs from the same 
> > user start executing to prevent this happening?
>
> same user no (I think). same schedd yes...
>
> http://condor.optena.com/display/CONDOR/JOB_START_DELAY
>
> note however that the jobs will have been matched so you would have to
> then prevent them from starting - this would be rather inefficient.
>
> I do not believe there is any easy way of only allowing x jobs to be
> negotiated and accepted at a time (which is what you would need to
> do).

I'm not sure this would do the trick, since the load check has already 
been done, right (it's in Requirements)? Once the job has been matched, 
it's going to start on some machine whether it takes 1 second or 10, and 
still drive the load through the roof. I think what I need is some way of 
adding the schedd's time-since-last-match to the requirements clause. Is 
that something that can be done? If its by schedd rather than by user, 
that's fine: 30 secs should be enough to prevent a load cascade.

Thanks,
Chris.


> Matt
>
>
> > Thanks,
> > Chris.
> >
> > --
> > Chris Green, MiniBooNE / LANL. Email greenc@xxxxxxxx
> > Tel: (630) 840-2167. Fax: (630) 840-3867
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--
Chris Green, MiniBooNE / LANL. Email greenc@xxxxxxxx
Tel: (630) 840-2167. Fax: (630) 840-3867