From: Frank Steiner Subject: Re: Terrible performance between 2.6.16 and 2.6.5 Date: Thu, 30 Nov 2006 16:18:11 +0100 Message-ID: <456EF633.9070106@bio.ifi.lmu.de> References: <456EC5D1.9050008@bio.ifi.lmu.de> <456EE99A.90009@atipa.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list2-new.sourceforge.net with esmtp (Exim 4.43) id 1Gpng2-0004Bg-JE for nfs@lists.sourceforge.net; Thu, 30 Nov 2006 07:18:18 -0800 Received: from acheron.ifi.lmu.de ([129.187.214.135]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1Gpng1-0003x3-IG for nfs@lists.sourceforge.net; Thu, 30 Nov 2006 07:18:20 -0800 To: Roger Heflin In-Reply-To: <456EE99A.90009@atipa.com> List-Id: "Discussion of NFS under Linux development, interoperability, and testing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nfs-bounces@lists.sourceforge.net Errors-To: nfs-bounces@lists.sourceforge.net 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 * Rekursion kann man erst verstehen, wenn man Rekursion verstanden hat. * ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs