[GE users] Resource Reservation behaves strange under 6.2u2

reuti reuti at staff.uni-marburg.de
Tue Dec 8 18:44:14 GMT 2009

Am 07.12.2009 um 14:34 schrieb jdobler:

> Sorry for the delay, I was busy with other things.
>>> I also do not understand why "qalter -w [p|v] ..." reported that it
>>> found a possible assignment, but then the job could not be started.
>> mem_free is not a conumable but a measured load, hence its value can
>> change over time. You can make mem_free or (virtual_free) a
>> consumable in `qconf -mc` which makes it more intuitional. I would
>> prefer virtual_free and give each node the amount of real installed
>> memory in `qconf -me <exechost>`. The scheduler will then take the
>> computed complex *and* measured load into account - whatever is
>> lower. Using virtual_free has the advantage, that you can define the
>> real installed memory and oversubscribing it by 100 MB won't generate
>> so much swapping (hence you can neglect the (delta)) (assuming you
>> have a swap space defined).
> We do have mem_free as consumable and also have it defined for each  
> exec host.
>>> Is it possible that qalter just checks the complex values while the
>>> scheduler (?)
>> Both qalter option? The difference should just be, that "v" assumes
>> an empty cluster, but "p" honors the actual load.
> There where jobs in different pe's affected, and if there was a  
> usable machine available, both options indicated no error, but the  
> job did not run. If there was no free machine, "-p" gave me a "no  
> suitable queues".

Can you check the output of `qstat -j <jobid>`? Is there anything  
like "... (-l NONE) ..." in the list of reasons why it can't be  

-- Reuti


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