From owner-freebsd-stable@FreeBSD.ORG Sun Mar 30 06:30:22 2003 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4578637B401 for ; Sun, 30 Mar 2003 06:30:22 -0800 (PST) Received: from flood.ping.uio.no (flood.ping.uio.no [129.240.78.31]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9696943F3F for ; Sun, 30 Mar 2003 06:30:21 -0800 (PST) (envelope-from des@ofug.org) Received: by flood.ping.uio.no (Postfix, from userid 2602) id D95A25308; Sun, 30 Mar 2003 16:30:18 +0200 (CEST) X-URL: http://www.ofug.org/~des/ X-Disclaimer: The views expressed in this message do not necessarily coincide with those of any organisation or company with which I am or have been affiliated. To: Anti From: des@ofug.org (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=) Date: Sun, 30 Mar 2003 16:30:17 +0200 In-Reply-To: <20030330081831.5c4e317e.fearow@attbi.com> (Anti's message of "Sun, 30 Mar 2003 08:18:31 -0600") Message-ID: User-Agent: Gnus/5.090015 (Oort Gnus v0.15) Emacs/21.2 References: <20030330125138.K23911@leelou.in.tern> <20030330081831.5c4e317e.fearow@attbi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable cc: Dag-Erling =?ISO-8859-1?Q?Sm=F8rgrav cc: freebsd-stable@freebsd.org cc: l.ertl@univie.ac.at Subject: Re: vinum performance X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Mar 2003 14:30:23 -0000 Anti writes: > try benchmarking ccd as well to see how it compares? and try some big str= ipe > sizes (4093, 8191, 12281)? I believe Greg showed in his USENIX paper on Vinum that large stripe sizes aren't preferable to small ones. I may misremember though. ccd isn't very interesting, its performance should be just slightly worse than single disk case. What would be interesting though would be to compare Vinum with ATA RAID (see the 'create' command in the atacontrol man page) DES --=20 Dag-Erling Sm=F8rgrav - des@ofug.org