Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755216AbXEBPqy (ORCPT ); Wed, 2 May 2007 11:46:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755222AbXEBPqy (ORCPT ); Wed, 2 May 2007 11:46:54 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:38522 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755218AbXEBPqv (ORCPT ); Wed, 2 May 2007 11:46:51 -0400 Date: Thu, 3 May 2007 01:46:37 +1000 From: David Chinner To: Gerhard Mack Cc: "Cabot, Mason B" , linux-kernel@vger.kernel.org Subject: Re: Ext3 vs NTFS performance Message-ID: <20070502154637.GC77450368@melbourne.sgi.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1504 Lines: 42 On Tue, May 01, 2007 at 11:54:04PM -0400, Gerhard Mack wrote: > On Tue, 1 May 2007, Cabot, Mason B wrote: > > > Hello all, > > > > I've been testing the NAS performance of ext3/Openfiler 2.2 against > > NTFS/WinXP and have found that NTFS significantly outperforms ext3 for > > video workloads. The Windows CIFS client will attempt a poor-man's > > pre-allocation of the file on the server by sending 1-byte writes at > > 128K-byte strides, breaking block allocation on ext3 and leading to > > fragmentation and poor performance. This will happen for many > > applications (including iTunes) as the CIFS client issues these > > pre-allocates under the application layer. > > > > I've posted a brief paper on Intel's OSS website > > (http://softwarecommunity.intel.com/articles/eng/1259.htm). Please give > > it a read and let me know what you think. In particular, I'd like to > > arrive at the right place to fix this problem: is it in the filesystem, > > VFS, or Samba? > > > > thanks, > > Mason > > > > Just out of curiosity do other filesystems(reiser, xfs) take the same > performance hit? XFS was also tested - it is as fast as the Windows NTFS based server..... Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/