NFS Performance (was Re: [Beowulf] GPFS on Linux (x86))

Joe Landman landman at scalableinformatics.com
Fri Sep 15 11:51:05 EDT 2006


Brent Franks wrote:
> On 9/15/06, Chris Samuel <csamuel at vpac.org> wrote:
>> Wild guess - NFS servers are running RHEL and using ext3 ?
> 
> Exactly.
> 
>> We used to have that problem with the 2 NFS servers for our 90 node 
>> cluster
>> till we dumped RHEL,  switched to Fedora and XFS and all our horrible NFS
>> problems went away.
> 
> Nice, any sort of comparison data in terms of differences in
> throughput achieved?

On similar systems we have set up for customers, we have sustained 420 
MB/s and 550 MB/s running later model kernels.

On the 550 MB/s system, we started out playing with ext3, and we were 
able to hit about 300 MB/s.

> 
> Additionally, are you writing your journal to a different partition?

Not in this case.

> 
> Thanks,
> 
> - Brent
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-- 

Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web  : http://www.scalableinformatics.com
phone: +1 734 786 8423
fax  : +1 734 786 8452 or +1 866 888 3112
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