[Clusterusers] request for CPU time

[Wm. Josiah Erikson]

The issue right now is that many of Tom's Digital Multiplier processes 
seem to be taking around 9 days to finish, so once they've grabbed a 
slot, they hold on to it for a very long time, which effectively means 
that nobody else can use the cluster while they are running, since we 
don't have any kicking-people-out algorithm, and everybody else's jobs 
finish in more like 20 minutes.
The solution, of course, is to change the "tom" tag to only use every 
other slot or something like that, or only run two processes per machine 
or something... but then they'll take even longer to finish.
Discussing tomorrow at the meeting seems like a good plan.
     -Josiah


On 6/27/13 2:19 PM, Lee Spector wrote:
> Hi Jaime,
>
> Fine with me personally but I'll check with my lab group to see what everyone's expected needs are. I'm also not sure exactly how to implement the idea if people do want to run some other things... maybe by having you use a subset of machines that everyone else excludes?
>
>   -Lee
>
> On Jun 27, 2013, at 2:14 PM, Jaime Davila wrote:
>
>> Greetings everyone,
>>
>> I wanted to check to see if it was possible for me to grab some more CPU cycles out of the cluster for a week or so. I just placed a new algorithm on my account, and have it run it, but it's fairly different from what I was doing before, and I would rather detect quickly if I need to tweak or change things, as opposed to having to wait a week to realize I need to make a 10 minute change.
>>
>> Last time that the system load diminished some, I noticed that my processes run at their top speed if the number of CPUs loaded to their maximum drops to about 75%, as opposed to the 97% where they are now. Maybe things will be that way this time around, maybe not? In either case, my grabbing more cpu cycles right now would be extremely useful.
>>
>> Thoughts?
>>
>> Thanks a lot,
>>
>> Jaime
>>
>> -- 
>> ******************************************************
>> Jaime J. Dávila
>> Associate Professor of Computer Science
>> Hampshire College
>> jdavila at hampshire dot edu
>> http://helios.hampshire.edu/jdavila
>> *******************************************************
>>
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> --
> Lee Spector, Professor of Computer Science
> Cognitive Science, Hampshire College
> 893 West Street, Amherst, MA 01002-3359
> lspector at hampshire.edu, http://hampshire.edu/lspector/
> Phone: 413-559-5352, Fax: 413-559-5438
>
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-- 
Wm. Josiah Erikson
Assistant Director of IT, Infrastructure Group
System Administrator, School of CS
Hampshire College
Amherst, MA 01002
(413) 559-6091