Date: Fri, 26 Jun 2009 17:18:12 +1000 From: peterjeremy@optushome.com.au To: Dan Naumov <dan.naumov@gmail.com> Cc: freebsd-fs@freebsd.org, freebsd-geom@freebsd.org Subject: Re: read benchmarks: ufs/zfs/ext3 raidz/raid5 Message-ID: <20090626071812.GA43965@server.vk2pj.dyndns.org> In-Reply-To: <cf9b1ee00906241327i28e2498er70c82fef04f1ccbe@mail.gmail.com> References: <cf9b1ee00906241327i28e2498er70c82fef04f1ccbe@mail.gmail.com>
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--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 <dan.naumov@gmail.com> 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--
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