From owner-freebsd-performance@FreeBSD.ORG Sun Aug 22 21:35:20 2004 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 800D416A4CE; Sun, 22 Aug 2004 21:35:20 +0000 (GMT) Received: from darkness.comp.waw.pl (darkness.comp.waw.pl [195.117.238.236]) by mx1.FreeBSD.org (Postfix) with ESMTP id 30A3143D2F; Sun, 22 Aug 2004 21:35:20 +0000 (GMT) (envelope-from pjd@darkness.comp.waw.pl) Received: by darkness.comp.waw.pl (Postfix, from userid 1009) id 180A1ACAE3; Sun, 22 Aug 2004 23:35:18 +0200 (CEST) Date: Sun, 22 Aug 2004 23:35:18 +0200 From: Pawel Jakub Dawidek To: Poul-Henning Kamp Message-ID: <20040822213518.GN30151@darkness.comp.waw.pl> References: <20040820193547.GZ30151@darkness.comp.waw.pl> <24879.1093031928@critter.freebsd.dk> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="krEeKW19zDoEvn6D" Content-Disposition: inline In-Reply-To: <24879.1093031928@critter.freebsd.dk> User-Agent: Mutt/1.4.2i X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 5.2.1-RC2 i386 cc: Greg 'groggy' Lehey cc: Wilko Bulte cc: freebsd-performance@FreeBSD.org Subject: Re: RAID-3? (was: cvs commit: src MAINTAINERS) X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Aug 2004 21:35:20 -0000 --krEeKW19zDoEvn6D Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Aug 20, 2004 at 09:58:48PM +0200, Poul-Henning Kamp wrote: +> In message <20040820193547.GZ30151@darkness.comp.waw.pl>, Pawel Jakub Da= widek w +> rites: +>=20 +> >As you can see RAID5 is only faster in READ tests for 15 and 100 proces= ses +> >working in parallel. As I can see, RAID3 is faster in all the rest test= s. +> > +> >PS. I wonder about read optimization, so parity component can be also +> > used for reading in round-robin fashion... +>=20 +> I would far rather have an option to give me data-integrity checking ? =2E..Just want to note, that I implemented both algorithms ("round-robin reading" and "verify reading") and committed to HEAD. Enjoy:) --=20 Pawel Jakub Dawidek http://www.FreeBSD.org pjd@FreeBSD.org http://garage.freebsd.pl FreeBSD committer Am I Evil? Yes, I Am! --krEeKW19zDoEvn6D Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFBKRGWForvXbEpPzQRAh2SAKCBGjt/+Z5GTygygmWQ1B8hB7VWowCguUNm OZ2Ab4kQvbVQTh1cSel9NHA= =8aS6 -----END PGP SIGNATURE----- --krEeKW19zDoEvn6D--