[Beowulf] network filesystem

Reuti reuti at staff.uni-marburg.de
Tue Mar 6 09:32:54 EST 2007


Hi,

Am 06.03.2007 um 14:00 schrieb Charlie Peck:

> 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?

for Gaussian all scratch files can be in the local $TMPDIR on the  
nodes - though the program itself is distributed via NFS for  
convenience. Even for parallel runs with Linda. We copy necessary  
files after the job back to the directory of the user, if s/he wishes  
to access them. Only the default output is written directly to the  
final location during execution time. Just don't set GAUSS_SCRDIR but  
make a cd to the batch system supplied $TMPDIR before the program call.

Some hints you can find on the SGE list:

http://gridengine.sunsource.net/servlets/ReadMsg? 
listName=users&msgNo=14600

-- Reuti


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