[Beowulf] Functionality of schedulers

Rayson Ho raysonlogin at gmail.com
Wed Feb 29 23:22:12 PST 2012


Jon,

Almost every cluster job scheduler supports preemption (use it as the
google keyword and you will find lots of references...).

Torque has job preemption. I have not used Torque for a while (I used
to be an OpenPBS user) so I am not the best person to answer the
question for Torque. However, if you google "job preemption"+torque,
you should be able to find some useful info.

In Grid Engine (and now Open Grid Scheduler) there is Subordinate Queues:

http://docs.oracle.com/cd/E19080-01/n1.grid.eng6/817-5677/i998889/index.html

Condor is well-known for cycle stealing, and it also offers the
checkpoint restart library for Open Grid Scheduler/Grid Engine and
other batch systems:

http://research.cs.wisc.edu/condor/checkpointing.html
http://gridscheduler.sourceforge.net/howto/checkpointing.html

(I am sure that you can integrate checkpointing with Torque so you
don't need to look for a new batch system to get what you need.)

Rayson

=================================
Open Grid Scheduler / Grid Engine
http://gridscheduler.sourceforge.net/

Scalable Grid Engine Support Program
http://www.scalablelogic.com/



On Thu, Mar 1, 2012 at 1:52 AM, Jon Tegner <tegner at renget.se> wrote:
> Hi list!
>
> Is there any scheduler which has the functionality to automatically put
> a running job on hold when another job with higher priority is submitted?
>
> Preferably the state of the first job should be frozen, and saved to
> disk, so that it can be restarted again when the higher priority job has
> finished.
>
> Is this at all possible (we are using torque/maui, and I couldn't find
> this feature there)?
>
> Regards,
>
> /jon
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