Re: [Condor-users] quick question: is periodic vacate possible

[Dan Bradley <dan@xxxxxxxxxxxx>]

Ian,

The machine's PREEMPT expression could be used to periodically 
checkpoint vanilla universe jobs that implement some kind of 
self-checkpointing.  You would just want to make sure that WANT_VACATE 
is true for the jobs that get preempted or they will be booted off 
without any chance to save state.

--Dan

Smith, Ian wrote:
> Dear All,
>
> Just a very quick question that I can't seem to find an answer for
> anywhere:
>
> Is it possible to periodically vacate jobs in the same way as
> they can be periodically held and removed ?
>
> The reason I ask is that I've been building checkpointing
> into some of our vanilla universe jobs and it would
> be useful if these could be vacated say once every
> few hours so that the checkpoint file get stored in
> the $(SPOOL). Some of the jobs can run for days
> and with few students around the campus at present
> they are unlikely to get evicted by user logins. This
> means that the output can get lost if the startd 
> crashes for some reason*, loosing several days
> work.
>
> regards,
>
> -ian.
>
> * I've noticed several connection failures with long running jobs 
>   and I'm still not sure of the reason although someone turning
>   off an execute host running a job is obviously one !
>
> --------------------------------------------
> Dr Ian C. Smith,
> Advanced Research Computing (e-Science) Team,
> The University of Liverpool
> Computing Services Department
>
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