From: Frank Steiner <fsteiner-mail1@bio.ifi.lmu.de>
To: Roger Heflin <rheflin@atipa.com>
Cc: nfs@lists.sourceforge.net
Subject: Re: Terrible performance between 2.6.16 and 2.6.5
Date: Thu, 30 Nov 2006 16:18:11 +0100 [thread overview]
Message-ID: <456EF633.9070106@bio.ifi.lmu.de> (raw)
In-Reply-To: <456EE99A.90009@atipa.com>
Roger Heflin wrote
> What is the type of the underlying disk subsystem? Did the underlying
> disk subsystem's performance change or is it the same? You may need
> to run bonnie or something similar to verify that the disk hardware
> is not where the issue is.
Not, that's the same external FC raid as before. But I will do
some local disk tests!
> I have seen the MPT driver in the later kernels be quite a bit
> slower (3x) with certain combinations of devices.
>
> And there are a fair number of issues were various other disk
> devices from time to time get much slower in newer kernels, but
> are fine in older kernels.
I don't think it's the disk itself, because the SuSE 10.1/SLES 10
clients don't show this performance problem when running the same
command on the same directories. Therefore I'm pretty sure that the
SLES 9 kernel has some issues with the newer NFS system in 2.6.16.
cu,
Frank
--
Dipl.-Inform. Frank Steiner Web: http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17 Phone: +49 89 2180-4049
80333 Muenchen, Germany Fax: +49 89 2180-99-4049
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prev parent reply other threads:[~2006-11-30 15:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-30 11:51 Terrible performance between 2.6.16 and 2.6.5 Frank Steiner
2006-11-30 14:24 ` Roger Heflin
2006-11-30 15:18 ` Frank Steiner [this message]
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