From owner-freebsd-questions@FreeBSD.ORG Tue Jan 25 16:55:22 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A2CB416A4CE; Tue, 25 Jan 2005 16:55:22 +0000 (GMT) Received: from luzifer.incubus.de (incubus.de [80.237.207.83]) by mx1.FreeBSD.org (Postfix) with ESMTP id 35EFB43D2D; Tue, 25 Jan 2005 16:55:22 +0000 (GMT) (envelope-from mkb@incubus.de) Received: from [192.168.2.10] (pD9542FCF.dip.t-dialin.net [217.84.47.207]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by luzifer.incubus.de (Postfix) with ESMTP id 59D8A30B4F; Tue, 25 Jan 2005 17:56:41 +0100 (CET) Message-ID: <41F679FF.5090809@incubus.de> Date: Tue, 25 Jan 2005 17:55:27 +0100 From: Matthias Buelow User-Agent: Mozilla Thunderbird 0.9 (X11/20041124) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Petri Helenius References: <41F571F4.1090504@he.iki.fi> In-Reply-To: <41F571F4.1090504@he.iki.fi> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-performance@freebsd.org cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Jan 2005 16:55:22 -0000 Petri Helenius wrote: > Are you sure you aren't comparing filesystems with different mount > options? Async comes to mind first. a) ext3 and xfs are logging filesystems, so the problem with asynchronous metadata updates possibly corrupting the filesystem on a crash doesn't arise. b) asynchronous metadata updates wouldn't have any performance benefit on a dd if=/dev/zero of=tstfile. c) please cut down your quotes, and write your answers below or between the quoted text, instead of the outlook text-above-fullquote style. thanks. mkb.