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Re: [Condor-users] suspending jobs - resourse efficiency questions
- Date: Mon, 30 Jun 2008 10:38:09 -0600 (MDT)
- From: Gary Orser <orser@xxxxxxxxxxx>
- Subject: Re: [Condor-users] suspending jobs - resourse efficiency questions
This suspend policy is what I would like to implement.
Anybody done this on blades with dual quad cpu's?
Department of Microbiology
Montana State University
1 Lewis Hall, Bozeman MT, 59717
On Mon, 30 Jun 2008, Dan Bradley wrote:
> Burak Han Alver wrote:
> >I have questions about suspending condor jobs in favor of other condor
> >jobs with configuration similar to the way described in 22.214.171.124
> >Do I understand correctly that:
> >1. The suspended job still uses memory and the running job will need to
> >use less memory in principle?
> The suspended job uses virtual memory, but not necessarily physical
> RAM. If the computer is configured to provide extra virtual memory on a
> disk (aka swap space), then the operating system will likely move the
> suspended job to disk if there is demand for its space in RAM.
> >2. The suspended job will not use CPU and the running job will be able
> >to use all of the CPU even though two virtual machines are defined?
> >3. Even though the whole CPU is available, the ClassAd for the VM will
> >advertise half the computing power?
> Condor will advertise twice as much computing power as actually exists
> (because in this example policy, NUM_CPUS is set twice the actualy
> number of CPUs). However, the suspension policy ensures that only one
> job runs on the real CPU at a time.
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