From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265816AbUBPUEJ (ORCPT ); Mon, 16 Feb 2004 15:04:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265839AbUBPUEJ (ORCPT ); Mon, 16 Feb 2004 15:04:09 -0500 Received: from columba.eur.3com.com ([161.71.171.238]:41687 "EHLO columba.eur.3com.com") by vger.kernel.org with ESMTP id S265816AbUBPUEE (ORCPT ); Mon, 16 Feb 2004 15:04:04 -0500 Message-ID: <4031222B.5030503@jburgess.uklinux.net> Date: Mon, 16 Feb 2004 20:03:55 +0000 From: Jon Burgess User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113 X-Accept-Language: en-gb, en-us, en MIME-Version: 1.0 To: Alex Zarochentsev CC: Jon Burgess , linux-kernel@vger.kernel.org Subject: Re: ext2/3 performance regression in 2.6 vs 2.4 for small interleaved writes References: <402BE01E.2010506@jburgess.uklinux.net> <20040216175127.GJ1298@backtop.namesys.com> In-Reply-To: <20040216175127.GJ1298@backtop.namesys.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alex Zarochentsev wrote: >The fs with delayed block allocation (Reiser4, XFS, seems JFS too) look much >better. > > Yes those results are in line with what I found on Reiserfs4 as well. I also tried incresing the number of streams to see when things start to break. Reiserfs4 seems to do well here as well. I stopped some tests early because some filesystems were just too slow. Streams: 1 1 2 2 4 4 8 8 16 16 32 32 Write Read Write Read Write Read Write Read Write Read Write Read ---------------------------------------------------------------------------------------- ext2 26.10 29.22 8.27 14.51 6.91 7.31 ------------------------------------- ext3-order 25.45 28.21 4.96 14.29 -------------------------------------------------- JFS 27.76 29.17 26.72 28.93 25.72 28.86 24.76 29.01 22.94 28.49 4.25 6.03 Reiser4 27.08 29.28 27.02 28.69 27.09 28.47 27.26 27.26 27.09 25.52 26.94 22.59 XFS 28.09 29.16 28.15 28.11 27.60 27.19 26.81 26.23 25.68 24.04 22.59 21.45 It would appear that with XFS and Reiser4 I would be able to simultaneously record >32 MPEG TV channels on to a single disk. I think that exceeds my TV recording requirements by some considerable margin :-) Jon