Date: Wed, 05 Mar 2008 14:30:27 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: 7.0-Release and 3ware 9550SXU w/BBU - horrible write performance Message-ID: <fqm72d$klr$1@ger.gmane.org> In-Reply-To: <47CE816A.6050903@tefre.com> References: <915419.88748.qm@web50505.mail.re2.yahoo.com> <47CE816A.6050903@tefre.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigD710BA679B38A6A014736D28 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Erik Stian Tefre wrote: > Results from bonnie++ with default settings on my box (7.0-RELEASE, > amd64, 480 MB system memory, BBU, write cache enabled, 7 drive raid-5, > storsave =3D balance, NCQ on): >=20 > Version 1.93d ------Sequential Output------ --Sequential Input- > --Random- > Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- > --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP > /sec %CP > xxxxxxxxxxxxxxxx 1G 275 83 72440 23 24990 6 644 83 76548 15 > 460.6 6 Was the array busy when you did the test? 72-76 MB MB/s is very slow for a 7-drive array in RAID-5. FreeBSD's disk IO can be sluggish but I doubt it would get that slow. On a RAID10 array with 6 drives I can get ~~ 200 MB/s in both directions (though on a different controller). RAID5 is basically striped so your setup should on average yield close to 6 times the single drive performance, something in the area of 350 MB/s. --------------enigD710BA679B38A6A014736D28 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHzqBzldnAQVacBcgRAtB1AJ9gK6FE/RRTraYTAdmHEmb9pSxnBgCg1hA0 uZXD9swUfYB/KF2Q9R+W+Do= =A+M0 -----END PGP SIGNATURE----- --------------enigD710BA679B38A6A014736D28--
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