From: "Aneesh Kumar K.V" Subject: Re: [PATCH] ext4: Group meta-data blocks together. Date: Thu, 15 May 2008 22:08:22 +0530 Message-ID: <20080515163822.GC23507@skywalker> References: <1210866839-7195-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <1210866839-7195-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <20080515160626.GB23507@skywalker> <482C617B.8090909@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: cmm@us.ibm.com, tytso@mit.edu, adilger@sun.com, linux-ext4@vger.kernel.org To: Eric Sandeen Return-path: Received: from E23SMTP06.au.ibm.com ([202.81.18.175]:46742 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751506AbYEOQic (ORCPT ); Thu, 15 May 2008 12:38:32 -0400 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.18.234]) by e23smtp06.au.ibm.com (8.13.1/8.13.1) with ESMTP id m4FGc3oo006776 for ; Fri, 16 May 2008 02:38:03 +1000 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m4FGcIEg4669518 for ; Fri, 16 May 2008 02:38:18 +1000 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m4FGcTVv021826 for ; Fri, 16 May 2008 02:38:29 +1000 Content-Disposition: inline In-Reply-To: <482C617B.8090909@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu, May 15, 2008 at 11:14:51AM -0500, Eric Sandeen wrote: > Aneesh Kumar K.V wrote: > > On Thu, May 15, 2008 at 09:23:59PM +0530, Aneesh Kumar K.V wrote: > >> This adds a per inode meta-block prealloc space from which > >> meta-data block requests are served. This help in making > >> sure meta-data block are closer. This is needed to speedup > >> unlink of the file. Any new prealloc space is allocated near > >> the goal block specified. The goal block is the last block > >> allocated for the file. So we don't keep the data-block and > >> meta-data block far apart. > >> > > > > The result can be found at > > > > http://www.radian.org/~kvaneesh/ext4/meta-group/ > > Out of curiosity, do you have graphs similar to > http://www.radian.org/~kvaneesh/ext4/meta-group/ext4-noextents-metagroup.png > > before and after your change? > No, But I can do that. -aneesh