Re: [Condor-users] about priorities

[Erik Paulson <epaulson@xxxxxxxxxxx>]

On Wed, Aug 04, 2004 at 06:16:45PM -0500, David A. Kotz wrote:
> I think what you want to do is to set the following in your
> condor_config:
> 
> SUSPEND = FALSE
> PREEMPT = FALSE
> KILL = FALSE
> 

That will help prevent the local machine from evicting the job (you'll also
probably want have START = TRUE, or some such)

Those expresssions have nothing to do with preemption for priority
purposes, though. Condor can "preempt" a job for two reasons - one, 
because the local conditions on the machine force us to get rid of a job,
or two, because there is a user with a higher priority who wants to run a 
job. That preemption is controlled by PREEMPTION_REQUIREMENTS. It is a 
pool-wide setting that is evaluated only when Condor has a higher
priority user who wants to run a job. It is tested against each machine
in the pool to see if the job currently running on that machine
can be preempted.

To prevent priority preemption, set:

PREEMPTION_REQUIREMENTS = FALSE

in the config file of your central manager.

-Erik
 
each machine of the pool. 
> - dave
> 
> 
> On Wed, 2004-08-04 at 03:44 -0700, Fernando Rannou wrote:
> > Hello,
> > I'm a little confused on how Condor handles priorities.
> > On Section 2.7.2 of the Condor manual it reads:
> > ---------
> > "The priority of each individual user changes according to the number
> > of resources the individual is using.
> > ...
> > 
> > "For instance, if a low priority user is utilizing all available machines
> > and suddenly a higher priority user submits jobs, Condor
> > will immediately checkpoint and vacate jobs belonging to
> > the lower priority user."
> > 
> > ---------
> > Which priority do they refer to? Effective, Real, Factor??
> > 
> > We need that once a job is running it never, ever
> > gets preempted, suspended, killed, or whatever
> > no matter how long it's been running and
> > no matter how low its priority is.
> > 
> > How can I accomplished that?
> > Thanks
> > 
> > Fernando
> > 
> > 
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> -- 
> David A. Kotz <dkotz@xxxxxxxxxxxxx>
> 
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