From: Trond Myklebust Subject: Re: Performance question Date: Fri, 15 Feb 2008 11:13:50 -0500 Message-ID: <1203092030.11333.4.camel@heimdal.trondhjem.org> References: <90d010000802140740y3ff2706ybc169728fbafbfb4@mail.gmail.com> <42996ba90802140827p533779c6o8ab404400be51fdc@mail.gmail.com> <80E378BD-86F7-4009-832A-2978A6FB4600@oracle.com> <90d010000802150737x2ad0739dmeaaa24dc2845e81a@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Chuck Lever , NFS list , Marcelo Leal To: Font Bella Return-path: Received: from pat.uio.no ([129.240.10.15]:56876 "EHLO pat.uio.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752604AbYBOQNz (ORCPT ); Fri, 15 Feb 2008 11:13:55 -0500 In-Reply-To: <90d010000802150737x2ad0739dmeaaa24dc2845e81a-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Fri, 2008-02-15 at 16:37 +0100, Font Bella wrote: > Finally, try different values of rsize and wsize in your > /etc/fstab, /etc/auto.home (if using automounts), or in general, in any mount > command. Check from client side also with 'cat /proc/mounts'. > Test your favourite benchmark with different rsize,wsize and look for an > optimal value. > > ALL the steps above were necessary for me to get good performance, but > the last step was > crucial, since I got very different performances depending on the > value of rsize/wsize. That very likely implies that you have problems with UDP packet loss. Switch to TCP. Trond