From mboxrd@z Thu Jan 1 00:00:00 1970 From: Olaf Kirch Subject: Re: ReasmFails increases / NFS performance on Linux Cluster Date: Tue, 17 Aug 2004 10:05:23 +0200 Sender: nfs-admin@lists.sourceforge.net Message-ID: <20040817080523.GA17099@suse.de> References: <005f01c483d4$b6fa9f40$6701a8c0@psyche1> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: 'Joshua Baker-LePain' , nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1BwzAX-00022v-2P for nfs@lists.sourceforge.net; Tue, 17 Aug 2004 01:18:09 -0700 Received: from externalmx-1.sourceforge.net ([12.152.184.25]) by sc8-sf-mx2.sourceforge.net with esmtp (TLSv1:AES256-SHA:256) (Exim 4.34) id 1Bwz3s-00066R-W5 for nfs@lists.sourceforge.net; Tue, 17 Aug 2004 01:18:08 -0700 Received: from cantor.suse.de ([195.135.220.2]) by externalmx-1.sourceforge.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.41) id 1Bwz3s-00059O-3k for nfs@lists.sourceforge.net; Tue, 17 Aug 2004 01:11:16 -0700 To: Patrice Seyed In-Reply-To: <005f01c483d4$b6fa9f40$6701a8c0@psyche1> 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: On Mon, Aug 16, 2004 at 05:05:09PM -0400, Patrice Seyed wrote: > You don't have enough threads. That 2nd number (after the number of > threads) should be as close to zero as possible -- that's the number of > times all threads have been busy when a request came in. IIRC, you have > plenty of memory on the server -- crank up the number of threads and you > should see some difference. Not necessarily. We're talking about nfsd threads hung in a COMMIT call - these can take over a second, and will block all WRITE calls to the same file for the entire duration. So a single client doing write-behind can easily tie up 8 or more server threads. Olaf -- Olaf Kirch | The Hardware Gods hate me. okir@suse.de | ---------------+ ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs