Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757317AbYCZH7t (ORCPT ); Wed, 26 Mar 2008 03:59:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750918AbYCZH7l (ORCPT ); Wed, 26 Mar 2008 03:59:41 -0400 Received: from smtp7-g19.free.fr ([212.27.42.64]:33986 "EHLO smtp7-g19.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752654AbYCZH7l convert rfc822-to-8bit (ORCPT ); Wed, 26 Mar 2008 03:59:41 -0400 Date: Wed, 26 Mar 2008 08:56:39 +0100 From: Emmanuel Florac To: "Bart Van Assche" Cc: "Chris Snook" , linux-kernel@vger.kernel.org Subject: Re: RAID-1 performance under 2.4 and 2.6 Message-ID: <20080326085639.3c7d3152@galadriel.home> In-Reply-To: References: <20080325194306.4ac71ff2@galadriel.home> <47E975F8.3000702@redhat.com> Organization: Intellique X-Mailer: Claws Mail 2.9.1 (GTK+ 2.8.20; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 724 Lines: 18 Le Wed, 26 Mar 2008 08:15:15 +0100 vous ?criviez: > If you want to benchmark write speed, you should add > oflag=direct,dsync to the dd command line. For benchmarking read speed > you should specify iflag=direct. Or, even better, you can use xdd with > the flags -dio -processlock. Thanks for the tip, I'll try these. -- -------------------------------------------------- Emmanuel Florac www.intellique.com -------------------------------------------------- -- 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/