[Swift-devel] MolDyn at Purdue

[Ioan Raicu]

I remember using he batch queue prediction system to try to estimate how 
long the queues would be, and we were getting relatively long queues (on 
the order of days) for just a few dozen processors for a a 24 hour 
period, and if we asked for anything significant (100+ processors), the 
prediction system was saying that it cannot give us a prediction... my 
guess is that the queue wait would have been longer than the maximum the 
prediction models were designed for.  The site was really busy, and 
there were hundreds of large jobs involving 100~1000 processors each run 
for days at a time.  We were essentially discouraged by all this, and 
decided that its not worth trying to do any large runs at NCSA (at that 
time), and that Nika would try to install the application at Purdue, and 
do try some larger scale runs there, as the Purdue site seemed to be 
relatively idle.  So, we never tried to submit a large allocation at 
NCSA... but maybewe should have, maybe we would have gotten it by now.

Ioan

Ian Foster wrote:
> It seems unlikely to me that you can't even submit it?
>
> Sent via BlackBerry from T-Mobile  
>
> -----Original Message-----
> From: Veronika Nefedova <nefedova at mcs.anl.gov>
> Date: Fri, 11 May 2007 08:58:12 
> To:Ian Foster <foster at mcs.anl.gov>
> Cc:iraicu at cs.uchicago.edu, swift-devel at ci.uchicago.edu
> Subject: Re: [Swift-devel] MolDyn at Purdue
>
> I think we had a problem submitting a big reservation to NCSA - even a smaller ones were in the queue for more then a week at that time. When we did a time estimate on a queue time it said something like 'unable to predict' or 'unable to accept'... 
> Ioan - do you remember what was the exact problem?
>
>
> Nika
>
>
>
>
> On May 11, 2007, at 8:31 AM, Ian Foster wrote:
> I note that we have stopped running at NCSA and switched to trying to run at Purdue. A good thing to try, certainly.
>
> However, could we not have had a big job in the queue at NCSA all this time, also, using Falkon, which would have run by now?
>
> Ian.
>
> Ioan Raicu wrote:Great, than we are set, the project is configurable at the Falkon startup!
> Ioan
>
>   

-- 
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Ioan Raicu
Ph.D. Student
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Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
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Email: iraicu at cs.uchicago.edu
Web:   http://www.cs.uchicago.edu/~iraicu
       http://dsl.cs.uchicago.edu/
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