[Mauiusers] qalter question

Dr. Henrik Schulz h.schulz at fzd.de
Thu Oct 15 02:52:58 MDT 2009

Dear Simon,

thanks for Your fast response! Your answer is exactly what I have  
already supposed.

Ok, this is only a minor problem. The situation is the following: a  
user submits a couple of jobs, lets say 100. He sets the requested  
walltime to a value of maybe 100 hours, which is normally enough for  
the simulations. The user always checks the progress of his  
simulations and sometimes, depending on the data, some of the jobs  
will not finish within 100 hours, but maybe in 105 or 110. Then he has  
to contact the administrator (me) who can increase the walltime to any  

Ok, the user could always request more walltime when submitting the  
jobs. But maybe it would be a good idea to have a variable, maybe then  
called "QALTER_USER_INCREASE", where the admin can allow the users to  
increase the requested resources by a defined percentage.

But this is only an idea and not really a requirement.


Am 15.10.2009 um 10:28 schrieb Simon Hammond:

> Hi Henrik,
> It doesn't really make sense to allow users to alter the walltime when
> the job is running because otherwise users will be able to request
> small jobs which backfill and then completely disrupt the fairness of
> the scheduling process. Taking a punt I think there would be very few
> system-administrators who would want to enable this.
> Can you explain more about what you are trying to do?
> Simon Hammond
> High Performance Systems Laboratory
> University of Warwick, UK
> 2009/10/15 Dr. Henrik Schulz <h.schulz at fzd.de>:
>> Dear all,
>> I have torque (2.3.6) and maui (3.2.6p21) running on my cluster. Maui
>> is running under my personal account (not root) and I am ADMIN1.
>> Other users can execute qalter on their own jobs only for queued  
>> ones.
>> Once the jobs are started and a user tries to increase the walltime
>> for example, he gets an "Unauthorized request". Is this normal
>> behaviour? Is it possible to change the configuration such a way that
>> a user can qalter his running jobs?
>> Thanks in advance!
>> Henrik
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Dr.-Ing. Henrik Schulz
Abteilung Informationstechnologie
Forschungszentrum Dresden-Rossendorf e.V.
01314 Dresden

E-Mail: H.Schulz at fzd.de
Tel.: +49 351 260-3268
Fax : +49 351 260-2048

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