From: "Darrick J. Wong" Subject: Re: [PATCH v2.1 00/50] e2fsprogs: Add metadata checksumming Date: Mon, 28 Nov 2011 23:52:28 -0800 Message-ID: <20111129075228.GA23175@tux1.beaverton.ibm.com> References: <20111129002755.17953.19556.stgit@elm3c44.beaverton.ibm.com> <484E5140-D0E7-4BE2-BF59-F88406D95E8C@dilger.ca> Reply-To: djwong@us.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Theodore Tso , Sunil Mushran , Amir Goldstein , Andi Kleen , Mingming Cao , Joel Becker , linux-ext4@vger.kernel.org, Coly Li To: Andreas Dilger Return-path: Received: from e5.ny.us.ibm.com ([32.97.182.145]:55854 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752288Ab1K2Hwe (ORCPT ); Tue, 29 Nov 2011 02:52:34 -0500 Received: from /spool/local by e5.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 29 Nov 2011 02:52:33 -0500 Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay05.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id pAT7qU3F241744 for ; Tue, 29 Nov 2011 02:52:30 -0500 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id pAT7qTqQ027540 for ; Tue, 29 Nov 2011 02:52:30 -0500 Content-Disposition: inline In-Reply-To: <484E5140-D0E7-4BE2-BF59-F88406D95E8C@dilger.ca> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Nov 28, 2011 at 10:17:35PM -0700, Andreas Dilger wrote: > On 2011-11-28, at 5:27 PM, Darrick J. Wong wrote: > > This patchset adds support in e2fsprogs for attaching crc32c checksums to most of the ext4 metadata objects. A full design document is on the > > ext4 wiki[1]. Please see the cover letter for the kernel patches for a > > more thorough summary of this work. > > > > [1] https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums > > This URL has changed: > > https://ext4.wiki.kernel.org/articles/e/x/t/Ext4_Metadata_Checksums_4d24.html > > It would also be useful to include in this wiki page the tests you > did for the checksum speed of different algorithms at different chunk > sizes, since checksums of 512MB of data are few and far between > (especially since this is not computing the checksum of file data). Oh, the wiki's back up... though I guess I can't log in either. I'll dig up the results and shove it in the google docs spreadsheet for now, I guess. --D > > Cheers, Andreas > > > > >