From: Andreas Dilger Subject: seekwatcher IO visualization Date: Thu, 9 Aug 2007 14:53:55 -0600 Message-ID: <20070809205355.GB6689@schatzie.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: "Jose R. Santos" Return-path: Received: from mail.clusterfs.com ([74.0.229.162]:51454 "EHLO mail.clusterfs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754316AbXHIUxx (ORCPT ); Thu, 9 Aug 2007 16:53:53 -0400 Content-Disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org I saw on #linuxfs today some graphs and movies by Chris Mason showing the poor IO locality for ext3 compared to btrfs and XFS. It would be interesting to run this with ext4+mballoc+delalloc, and a separate one with the FLEXBG feature enabled to see how that improves the seeking/locality. http://oss.oracle.com/~mason/seekwatcher/ Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc.