[Beowulf] Network Filesystems performance

Michael Will mwill at penguincomputing.com
Thu Aug 23 18:09:51 EDT 2007


Don't use async on the server unless you completely trust it to never
crash or your data is not important.

I have to revisit NFS over Infiniband but I have definitely seen better
than 40MB/s - is that maybe your disk subsystems limit rather than the
network?

How is your disk subsystem configured?

Michael 

-----Original Message-----
From: beowulf-bounces at beowulf.org [mailto:beowulf-bounces at beowulf.org]
On Behalf Of Glen Dosey
Sent: Thursday, August 23, 2007 12:16 PM
To: Jeff Blasius
Cc: Beowulf
Subject: Re: [Beowulf] Network Filesystems performance

I am using the async flag. I'm also using the Infiniband now instead of
the GigE and I've increased my default TCP window up to 6MB. None of it
makes a difference. It's still around 40MB/s.

Thanks for the thought.


On Thu, 2007-08-23 at 15:11 -0400, Jeff Blasius wrote:
> Yes.
> 
> Just a shot in the dark, but are you using the async flag in your nfs 
> export options? Can you bond your ethernet ports for a quick win?
> 
> Thanks,
>              jeff
> 
> On 8/23/07, Glen Dosey <doseyg at r-networks.net> wrote:
> > Perhaps I should just ask the simple question. Does anyone on-list 
> > obtain greater than 40 MB/s performance from their networked 
> > filesystems ( when the file is not already cached in the servers
memory ) ?
> >
> > (Yes it's a loaded question because if you answer affirmatively, 
> > then I know who to interrogate with further questions :)
> >
> > _______________________________________________
> > Beowulf mailing list, Beowulf at beowulf.org To change your 
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> 
> 

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