[Mauiusers] numerous problems with reservations

Garrick Staples garrick at usc.edu
Fri Jul 8 18:57:29 MDT 2005


No, the sheer size of the cluster dictates that I normally leave logging at
level 1.  But I'll try and figure out when it happened. 

I suspect that the feature constraint is forgotten immediately after the
reservation is initially created.  Then, once the reservation starts, as jobs
exit and non-priya nodes are freed, the "ALL" tasks makes the reservation slurp
up the nodes.


And this is fun...
# setres -c priya -d +7:00:00:00 -f priya -n priya  TASKS==5
reservation created


reservation 'priya' created on 0 nodes (0 tasks)

# showres | grep priya
priya               User -   -00:00:09  6:23:59:51  7:00:00:00    0/0    Fri Jul  8 17:56:37
priya.1             User -    -7:30:19  7:16:29:41  8:00:00:00 1388/2776 Fri Jul  8 10:26:27
# showres -n priya
ERROR:    command failed: 'cannot locate reservation' (rc: -1)
# releaseres priya


released User reservation 'priya'




On Fri, Jul 08, 2005 at 06:42:52PM -0600, David B Jackson alleged:
> Garrick,
> 
>   We will look at this next week.  Do you have logging from this event?
> 
> Dave
> 
> > Given:
> >   setres -c priya -d +8:00:00:00 -s +12:00:00 -f priya -n priya ALL
> >
> > Shouldn't that reservation all nodes with "priya" for 8 days 12 hours from
> > now?
> >
> > I set that yesterday, and 'showres -n' showed the correct nodes, 520 of
> > them
> > with the "priya" feature.
> >
> > Today, that reservation has grow itself to 1388 nodes!
> >
> >
> > So now I'm trying to set a second reservation, exactly like the first but
> > with
> > TASKS==520 and it is failing to set?
> >
> > # setres -c priya -d +7:00:00:00 -f priya -n priya TASKS==520
> > ERROR:    'setres' failed
> > ERROR:    cannot select 520 tasks for reservation for 7:17:06:28
> > ERROR:    cannot select requested tasks for 'TASKS==520'
> >
> >
> > Also, can -s default to "as soon as the resources are available" instead
> > of
> > "now"?  Trying to do '-d +7:00:00:00 -f priya ALL' requires a guessing
> > game to
> > find a suitable starting time.
> >
> > --
> > Garrick Staples, Linux/HPCC Administrator
> > University of Southern California
> > _______________________________________________
> > mauiusers mailing list
> > mauiusers at supercluster.org
> > http://www.supercluster.org/mailman/listinfo/mauiusers
> >
> 

-- 
Garrick Staples, Linux/HPCC Administrator
University of Southern California
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