From: Sten Spans Subject: Re: Performance Difference Between Linux NFS Server and Netapp Date: Thu, 14 Jul 2005 13:25:13 +0200 (CEST) Message-ID: References: <42D2F8F9.4010304@plasmabat.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1Dt1qG-0002xf-Mr for nfs@lists.sourceforge.net; Thu, 14 Jul 2005 04:25:24 -0700 Received: from ford.blinkenlights.nl ([213.204.211.2] ident=sten) by sc8-sf-mx2.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1Dt1qF-0001YR-6L for nfs@lists.sourceforge.net; Thu, 14 Jul 2005 04:25:24 -0700 To: Hugh Caley In-Reply-To: <42D2F8F9.4010304@plasmabat.com> Sender: nfs-admin@lists.sourceforge.net 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, 11 Jul 2005, Hugh Caley wrote: > How does Netapp do it? Don't suppose they'd tell me ... Quite simple really, you pay them loads of money, they give part of it to engineers doing work on nfs tuning. They generally have 3 performance advantages: - battery backed cache with full os support, which should make it perform better than battery backed cache on normal raid cards. They use this cache for journaling. I suppose one could try something similar with pci-ram cards with battery and store the journal on these. - special filesystem which allows writing data on any disk, this allows distributing the workload across the available disks, more disks more performance ( if the fibrechannel can handle it ). - Highly tuned nfs inplementation with dedicated operating system. The bruteforce linux approach is quite good for the money spent, but don't expect the features/performance of a way more expensive enterprise solution. -- Sten Spans "There is a crack in everything, that's how the light gets in." Leonard Cohen - Anthem ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs