From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Fri, 29 Jun 2007 00:08:33 -0700 (PDT) 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 l5T78PtL009302 for ; Fri, 29 Jun 2007 00:08:27 -0700 Date: Fri, 29 Jun 2007 17:08:14 +1000 From: David Chinner Subject: Re: xfs_fsr, performance related tweaks Message-ID: <20070629070814.GR31489@sgi.com> References: <4683ADEB.3010106@corky.net> <46841C60.5030207@sandeen.net> <4684A506.4030705@corky.net> <4684A98B.1030000@corky.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4684A98B.1030000@corky.net> Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: Just Marc Cc: Barry Naujok , xfs@oss.sgi.com On Fri, Jun 29, 2007 at 07:41:15AM +0100, Just Marc wrote: > Barry Naujok wrote: > >You can use the xfs_io chattr command to mark known files as > >nodefrag. Using the chattr -R option can be used to recurse > >directories. > > That's right but I can't do this on a filesystem that's just been > defragged say a minute ago, and in the mean time 20 new files got added > (I don't know what these files are... ). So walk the filesystem with a script that queries the number of extents in each file, and if they have a single extent then run the xfs_io on them. Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group