From: Chris Penney <cpenney@gmail.com>
To: nfs@lists.sourceforge.net
Subject: Re: SMP, NFS, and 2.6
Date: Wed, 30 Mar 2005 11:40:03 -0500 [thread overview]
Message-ID: <111aefd05033008401742da5@mail.gmail.com> (raw)
In-Reply-To: <20050329211324.GK22447@hmsendeavour.rdu.redhat.com>
On Tue, 29 Mar 2005 16:13:24 -0500, Neil Horman <nhorman@redhat.com> wrote:
> On Tue, Mar 29, 2005 at 03:58:02PM -0500, Chris Penney wrote:
> > I've heard from some (via google searchs) that there are issues with
> > NFS + SMP when using the 2.6 kernel. Assuming I'm using 2.6.11.5 w/
> > the NFS-ALL patches applied should I be concerned about running SMP
> > (dual cpu pentium 4 doing pretty much only NFSv3 TCP, but looking
> > toward NFSv4)?
> >
> > Assuming it's ok to use SMP on a heavy use NFS server, should I enable
> > or disable hyperthreading? I'd assume that for NFS hyperthreading
> > would be good, but that's only a guess.
> >
> > Thanks,
> >
> > Chris
> >
> Are you referring to the dcache problems with XFS? I think it was only a
> problem when the NFS server was exporting an XFS file system. I also haven't
> checked in some time, but I believe those problems have since been fixed.
>
> Neil
Yes, most of what I read was regarding XFS. I was not sure if there
were any issues outside of that (I'm using JFS right now).
As far as HyperThreading my testing so far has shown that under heavy
loads enabling HyperThreading on a dual-cpu P4 box seems to be a good
thing. I would grab 30s of packets with ethereal and look at the NFS
stats and the responce time on writes/commits (which we see a fair bit
of) were at least 33% faster if not more. I'm not sure if that's an
accurate way to measure though -- I know enough to be dangerous, but
I'm not an expert.
Chris
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click
_______________________________________________
NFS maillist - NFS@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nfs
next prev parent reply other threads:[~2005-03-30 16:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-29 20:58 SMP, NFS, and 2.6 Chris Penney
2005-03-29 21:13 ` Neil Horman
2005-03-30 16:40 ` Chris Penney [this message]
2005-03-31 13:17 ` Neil Horman
2005-04-04 12:33 ` Anders Saaby
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=111aefd05033008401742da5@mail.gmail.com \
--to=cpenney@gmail.com \
--cc=nfs@lists.sourceforge.net \
--cc=penney@msu.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.