From owner-freebsd-geom@FreeBSD.ORG Wed Dec 7 16:56:43 2005 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 290F416A41F for ; Wed, 7 Dec 2005 16:56:43 +0000 (GMT) (envelope-from pjd@garage.freebsd.pl) Received: from mail.garage.freebsd.pl (arm132.internetdsl.tpnet.pl [83.17.198.132]) by mx1.FreeBSD.org (Postfix) with ESMTP id B74D043D70 for ; Wed, 7 Dec 2005 16:56:41 +0000 (GMT) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id 631AF52CA6; Wed, 7 Dec 2005 17:56:39 +0100 (CET) Received: from localhost (dke234.neoplus.adsl.tpnet.pl [83.24.8.234]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.garage.freebsd.pl (Postfix) with ESMTP id 4A1F850F92; Wed, 7 Dec 2005 17:56:32 +0100 (CET) Date: Wed, 7 Dec 2005 17:55:39 +0100 From: Pawel Jakub Dawidek To: OxY Message-ID: <20051207165538.GJ53288@garage.freebsd.pl> References: <000b01c5fb3c$b47456e0$0201a8c0@oxy> <20051207155133.GI53288@garage.freebsd.pl> <000701c5fb4b$c2682010$0201a8c0@oxy> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="y0Ed1hDcWxc3B7cn" Content-Disposition: inline In-Reply-To: <000701c5fb4b$c2682010$0201a8c0@oxy> X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 User-Agent: mutt-ng/devel-r535 (FreeBSD) X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on mail.garage.freebsd.pl X-Spam-Level: X-Spam-Status: No, score=-0.5 required=3.0 tests=BAYES_00,RCVD_IN_NJABL_DUL, RCVD_IN_SORBS_DUL autolearn=no version=3.0.4 Cc: freebsd-geom@freebsd.org Subject: Re: geom mirror write performance problem X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Dec 2005 16:56:43 -0000 --y0Ed1hDcWxc3B7cn Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 07, 2005 at 05:32:04PM +0100, OxY wrote: +> here's my dmesg Looks good. I was wondering if you don't have two disks on the same ATA channel, but no. I'd like you tu run a test, but don't see how it can be done without destrying your mirror. Basically, you should try running two parallel writes on you both disks. Something like this: #!/bin/sh dd if=3D/dev/zero of=3D/dev/ad0 bs=3D1m count=3D1000 & dd if=3D/dev/zero of=3D/dev/ad2 bs=3D1m count=3D1000 & wait And see how it compares to single write test. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --y0Ed1hDcWxc3B7cn Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDlxQKForvXbEpPzQRAn1yAKDFMf24oGJ2OBLrV6Xd8Zup+wE9WQCePIoG 1N6BwFzsNFo20U48D7s3dao= =P9uk -----END PGP SIGNATURE----- --y0Ed1hDcWxc3B7cn--