From: Greg Banks <gnb@sgi.com>
To: Jeffrey Layton <jtlayton@poochiereds.net>
Cc: nfs@lists.sourceforge.net
Subject: Re: Poor NFS performance, kernel 2.6.6.
Date: Wed, 2 Jun 2004 23:00:54 +1000 [thread overview]
Message-ID: <20040602130054.GP323@sgi.com> (raw)
In-Reply-To: <1086179633.3325.0.camel@tesla.mmt.bellhowell.com>
On Wed, Jun 02, 2004 at 08:33:53AM -0400, Jeffrey Layton wrote:
> The machines are different hardware, but local write performance is
> pretty comparable (in fact the 2.6 box is a faster machine, and is
> currently less utilized than the 2.4 kernel machine). Both are using
> reiserfs as the underlying filesystem.
What is the speed on each server for a local dd from /dev/zero to disk?
What actual kernel versions are you running?
> Write performance in this cursory test was 10x worse!
This completely fails to correlate with my experience. I'm using XFS
on 2.6.4 and I see single thread streaming write performance increase
by about 25% going from 2.4 to 2.6. Other metrics show improvements
as good or better, except the scalability of UDP reads tops out lower.
Greg.
--
Greg Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.
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next prev parent reply other threads:[~2004-06-02 13:01 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-02 12:33 Poor NFS performance, kernel 2.6.6 Jeffrey Layton
2004-06-02 13:00 ` Greg Banks [this message]
2004-06-02 13:40 ` Jeffrey Layton
2004-06-02 13:14 ` Vincent ROQUETA
2004-06-02 14:53 ` Jeffrey Layton
-- strict thread matches above, loose matches on Subject: below --
2004-05-27 13:16 Harald Hannelius
2004-05-27 10:31 Harald Hannelius
[not found] ` <200405271251.22746.vincent.roqueta@ext.bull.net>
2004-05-27 12:17 ` Harald Hannelius
2004-05-27 12:45 ` Vincent ROQUETA
2004-05-27 12:39 ` Dexter Filmore
2004-05-27 13:03 ` Harald Hannelius
2004-05-27 18:07 ` Bernd Schubert
2004-05-27 19:01 ` Trond Myklebust
2004-05-27 20:56 ` Harald Hannelius
2004-05-27 22:09 ` Trond Myklebust
2004-05-28 7:17 ` Harald Hannelius
2004-05-28 13:55 ` Olaf Kirch
2004-05-28 16:57 ` Phy Prabab
2004-05-28 18:03 ` Harald Hannelius
2004-05-28 19:19 ` Trond Myklebust
2004-06-01 0:16 ` Yusuf Goolamabbas
2004-06-02 6:57 ` Trond Myklebust
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