From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Sun, 28 Jan 2007 15:54:12 -0800 (PST) Received: from larry.melbourne.sgi.com (larry.melbourne.sgi.com [134.14.52.130]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with SMTP id l0SNs2qw031932 for ; Sun, 28 Jan 2007 15:54:05 -0800 Date: Mon, 29 Jan 2007 10:52:55 +1100 From: David Chinner Subject: Re: [DISCUSS] xfs allocation bitmap method over linux raid Message-ID: <20070128235255.GS33919298@melbourne.sgi.com> References: <5d96567b0701232234y2ff15762sbd1aaada5c3a0a0@mail.gmail.com> <1169678294.18017.200.camel@edge> <5d96567b0701280232w17e1a187r95d2c59711799b1a@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5d96567b0701280232w17e1a187r95d2c59711799b1a@mail.gmail.com> Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: "Raz Ben-Jehuda(caro)" Cc: nscott@aconex.com, linux-xfs@oss.sgi.com On Sun, Jan 28, 2007 at 12:32:23PM +0200, Raz Ben-Jehuda(caro) wrote: > first many thanks to your reply. > see bellow. > > On 1/25/07, Nathan Scott wrote: > >Hi Raz, > > > >On Wed, 2007-01-24 at 08:34 +0200, Raz Ben-Jehuda(caro) wrote: > >> David Hello. > >> I have looked up in LKML and hopefully you are the one to ask in > >> regard to xfs file system in Linux. > > > > >OOC, which one? (would be nice to put an entry for your company > >on the http://oss.sgi.com/projects/xfs/users.html page). > > > >> These servers demand high throughput from the storage. > >> We applied XFS file system on our machines. > >> > >> A video server reads a file in a sequential manner. So, if a > > > >Do you write the file sequentially? Buffered or direct writes? > does not matter. even command like: > dd if=/dev/zero of=/d1/xxx bs=1M count=1000 > will reveil extents of size modulo(stripe unit ) != 0 Did you make the filesystem with a stripe unit set properly? Can you post the output of 'xfs_info -n /path/to/mntpt'? Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group