From owner-freebsd-fs@FreeBSD.ORG Fri Jun 26 07:18:16 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BD491106564A; Fri, 26 Jun 2009 07:18:16 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail15.syd.optusnet.com.au (mail15.syd.optusnet.com.au [211.29.132.196]) by mx1.freebsd.org (Postfix) with ESMTP id 4F6D98FC14; Fri, 26 Jun 2009 07:18:16 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from server.vk2pj.dyndns.org (c122-106-216-167.belrs3.nsw.optusnet.com.au [122.106.216.167]) by mail15.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id n5Q7IDr0011915 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 26 Jun 2009 17:18:14 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.3/8.14.3) with ESMTP id n5Q7ICi4044109; Fri, 26 Jun 2009 17:18:12 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.3/8.14.3/Submit) id n5Q7IC77044108; Fri, 26 Jun 2009 17:18:12 +1000 (EST) (envelope-from peter) Date: Fri, 26 Jun 2009 17:18:12 +1000 From: peterjeremy@optushome.com.au To: Dan Naumov Message-ID: <20090626071812.GA43965@server.vk2pj.dyndns.org> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="tKW2IUtsqtDRztdT" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.19 (2009-01-05) Cc: freebsd-fs@freebsd.org, freebsd-geom@freebsd.org Subject: Re: read benchmarks: ufs/zfs/ext3 raidz/raid5 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Jun 2009 07:18:17 -0000 --tKW2IUtsqtDRztdT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2009-Jun-24 23:27:31 +0300, Dan Naumov wrote: >Random Access reads, 5MB chunks: >http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-dis= kperf-untuned-5mb.png >Random Access reads, 1MB chunks: >http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-dis= kperf-untuned-1mb.png >Random Access reads, 5MB chunks (big list): >http://virtual.tehinterweb.net/livejournal/raid_performance/raid-diskperf-= 5mb-all.png These benchmarks are all fairly meaningless. As a first order approximation, all I/O to a Unix FS should be writes or you don't have enough RAM for your application. A more meaningful benchmark would check writes or a read/write mix with ~90% writes. --=20 Peter Jeremy --tKW2IUtsqtDRztdT Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkpEdjQACgkQ/opHv/APuIeTswCgnwUYdvRhcnucf6Rrg1qovteD jOEAnR5nn9s7+rzB5O5StMyelmeV4g8G =pxVr -----END PGP SIGNATURE----- --tKW2IUtsqtDRztdT--