From: Olaf Kirch Subject: Re: Poor NFS performance, kernel 2.6.6. Date: Fri, 28 May 2004 15:55:15 +0200 Sender: nfs-admin@lists.sourceforge.net Message-ID: <20040528135515.GG5657@suse.de> References: <1085695748.23934.94.camel@lade.trondhjem.org> 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 ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1BThs6-0007WO-1u for nfs@lists.sourceforge.net; Fri, 28 May 2004 06:58:06 -0700 Received: from cantor.suse.de ([195.135.220.2]) by sc8-sf-mx1.sourceforge.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.30) id 1BThs5-0007eD-Gv for nfs@lists.sourceforge.net; Fri, 28 May 2004 06:58:05 -0700 To: Harald Hannelius In-Reply-To: Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: [2.6 over loopback nfs] > real 6m21.086s > user 0m1.712s > sys 0m5.454s [2.4 over loopback nfs] > real 1m11.875s > user 0m1.730s > sys 0m7.730s This roughly matches some performance issues I've been seeing on a 2.6.5 kernel. Are you using reiser or ext3? In general, dd to a local file is much different from what NFS does, because nfsd flushes data to disk. The NFS client will usually issue a COMMIT call roughly every 1 Meg, so the following should mimic the behavior of nfsd a little better, when run on your file system locally iozone -s 1g -r 1m -o -i 0 Higher numbers indicate better performance. Could you run this on 2.4 and 2.6, please? Olaf -- Olaf Kirch | The Hardware Gods hate me. okir@suse.de | ---------------+ ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs