From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933902AbXGRROh (ORCPT ); Wed, 18 Jul 2007 13:14:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760671AbXGRRO3 (ORCPT ); Wed, 18 Jul 2007 13:14:29 -0400 Received: from bipbip.grupopie.com ([195.23.16.24]:53599 "EHLO bipbip.grupopie.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760570AbXGRRO2 (ORCPT ); Wed, 18 Jul 2007 13:14:28 -0400 Message-ID: <469E4A70.1000306@grupopie.com> Date: Wed, 18 Jul 2007 18:14:24 +0100 From: Rui Santos Organization: GrupoPIE, Portugal SA User-Agent: Thunderbird 2.0.0.4 (X11/20070613) MIME-Version: 1.0 To: koan CC: linux-kernel@vger.kernel.org Subject: Re: Slow Soft-RAID 5 performance References: <64d833020707180707i1bbbbcbao783e33a2487c9e2b@mail.gmail.com> In-Reply-To: <64d833020707180707i1bbbbcbao783e33a2487c9e2b@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org koan wrote: > How did you create the ext3 filesystem? The chunk_size is at 256KB, ext3 block size is 4k. I believe the correct option that should be passed trough to --stride is 64. Am I correct ? I've also tested ( after sending my first report ) with xfs. I've also increases readahead to 65535 on all HD's I've also increases the stripe_cache_size to 16384. I can now get ~100MB/sec... > > Did you use the appropriate --stride option as noted here: > http://tldp.org/HOWTO/Software-RAID-HOWTO-5.html (#5.11) > - > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > > >