From: Eric Sandeen Subject: Re: Test results for ext4 Date: Sat, 31 May 2008 14:35:13 -0500 Message-ID: <4841A871.3020500@redhat.com> References: <48402253.8040407@bull.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: ext4 development , Mingming Cao , "Jose R. Santos" To: Valerie Clement Return-path: Received: from mx1.redhat.com ([66.187.233.31]:32929 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752033AbYEaThK (ORCPT ); Sat, 31 May 2008 15:37:10 -0400 In-Reply-To: <48402253.8040407@bull.net> Sender: linux-ext4-owner@vger.kernel.org List-ID: Valerie Clement wrote: > Hi all, > > Since a couple of weeks, I did batches of tests to have some performance > numbers for the new ext4 features like uninit_groups, flex_bg or > journal_checksum on a 5TB filesystem. > I tried to test allmost all combinations of mkfs and mount options, but > I put only a subset of them in the result tables, the most significant > for me. > > I had started to do these tests on a kernel 2.6.26-rc1, but I'd got several > hangs and crashes occuring randomly outside ext4, sometimes in the slab > code or in the scsi driver eg., and which were not reproductible. > Since 2.6.26-rc2, no crash or hang occur with ext4 on my system. > > The first results and the test description are available here: > http://www.bullopensource.org/ext4/20080530/ffsb-write-2.6.26-rc2.html > http://www.bullopensource.org/ext4/20080530/ffsb-readwrite-2.6.26-rc2.html > One other question on the tests; am I reading correctly that ext3 used "data=writeback" but ext4 used the default data=ordered mode? Thanks, -Eric