Re: [condor-users] One vm or two?

[Mark Silberstein <marks@xxxxxxxxxxxxxxxxxxxxxxx>]

Thanks, Derek,
Well, I know that we can prevent Condor from evict jobs like that, but
it is generally a required behavior to prevent thrashing. Anyway, thanks
for reminding me, that Condor is fully programmed from its config file,
it is sometimes confusing that even a very low-level stuff can be
configured. 
Thanks
Mark

On Sat, 2003-12-06 at 20:41, Derek Wright wrote:
> On Sat, 06 Dec 2003 10:28:17 +0200  Mark Silberstein wrote:
> 
> > Doesn't Condor update the job's Image size during the job is
> > running?
> 
> yes.
> 
> > We had our Matlab jobs evicted when they were reaching 1/2 of the
> > memory in the dual CPU machine. So the fact the job declares about
> > itself to require only 1 KB of RAM helps only to get the resource,
> > but not get the job completed.
> > I'm definitely missing something, can you explain?
> 
> the startd only evicts jobs that use "too much" memory if you
> configure it to be that way.  for example, your PREEMPT and/or SUSPEND
> expression must have a clause like this:
> 
> PREEMPT = (...) || (TARGET.ImageSize > Memory * 1024)
> 
> unfortunately, ImageSize is in kbytes, while Memory is in mbytes. :(
> 
> so, if you don't have anything like that in your PREEMPT and SUSPEND
> expressions, Condor will happily let your job keep running, even if
> it's using more RAM than it asked for.
> 
> enjoy,
> -derek
> 
> 
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