From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Robottom Reis Subject: Re: (More) NFS Performance woes Date: Thu, 25 Jan 2007 17:37:05 -0200 Message-ID: <20070125193705.GB7267@anthem.async.com.br> References: <45815427.8070805@nighthawkrad.net> <20061214160359.GA11876@fieldses.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: nfs@lists.sourceforge.net To: "J. Bruce Fields" 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 1HAAPs-00038T-K2 for nfs@lists.sourceforge.net; Thu, 25 Jan 2007 11:37:48 -0800 Received: from frodo.hserus.net ([204.74.68.40]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1HAAPu-0002QP-3a for nfs@lists.sourceforge.net; Thu, 25 Jan 2007 11:37:50 -0800 In-Reply-To: <20061214160359.GA11876@fieldses.org> 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 On Thu, Dec 14, 2006 at 11:03:59AM -0500, J. Bruce Fields wrote: > On Fri, Dec 15, 2006 at 12:39:51AM +1100, Christopher Smith wrote: > > The first test is copying a single large file of about 700M from the > > (client) local disk to the NFS mount. > > The second test is untarring a 700M tarfile from the (client) local disk > > to the NFS mount (~5000 files). > > > > Test #1 consistently finishes in about 17 seconds, delivering about 40 > > MiB/s. > > Test #2 consistently finishes in about 85 seconds, delivering about 8 MiB/s > > That's about 17ms per file? Each of those 5000 file creations is a > synchronous operation--the server doesn't respond until it's actually > committed the operation to disk. I don't really know what expected > numbers are for your hardware, but given that for each file we have to > wait for both the initial creation and the final flush of the data to > disk on close, 17ms doesn't sound too far off. I actually found the numbers that Christopher is seeing pretty good. If I could get a 700MB write of 5000 files to an NFS mount in 85s I'd be as happy as could be. I'm imagining that if this wasn't Gigabit this would be a lot slower -- am I wrong? -- Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 3376 0125 ------------------------------------------------------------------------- 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