[Beowulf] network filesystem

Joe Landman landman at scalableinformatics.com
Tue Mar 6 08:26:40 EST 2007


Charlie Peck wrote:
> On Mar 5, 2007, at 10:43 PM, Chris Samuel wrote:
> 
>> So yes, NFS should be fine.  Just don't try and run Gaussian on it. :-)
> 
> Ok, I'll bite.  We're just starting to support Gaussian on a couple of 
> small clusters (32 and 64 cores respectively) and we don't have a lot of 
> experience with it.  It looks like there are 3 primary directories, the 
> software root, the tmp dir, and the molecular system/output files.  
> Which subset of these shouldn't be accessed via NFS?

Charlie:

   Depending upon which links are run, Gaussian can do a fairly good job 
of consuming all your I/O bandwidth, and then some.  Not all links are 
like this, the DFT links seem to be non-IO bound.  As soon as you start 
spilling integrals to disk, you will see what we mean.

Joe

> 
> thanks,
> charlie
> 
> Charlie Peck
> Computer Science, Earlham College
> http://cs.earlham.edu
> hhtp://cluster.earlham.edu
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-- 

Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
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