Date: Thu, 08 Mar 2007 11:49:11 +0100 From: Ivan Voras <ivoras@fer.hr> To: freebsd-stable@freebsd.org Cc: freebsd-geom@freebsd.org Subject: Re: Some Unix benchmarks for those who are interesed Message-ID: <esopn6$a6f$1@sea.gmane.org> In-Reply-To: <45EF93E5.50804@fluffles.net> References: <20070306020826.GA18228@nowhere> <45ECF00D.3070101@samsco.org><20070306050312.GA2437@nowhere><008101c75fcc$210c74a0$0c00a8c0@Artem> <esk9vq$uhh$1@sea.gmane.org><001a01c7601d$5d635ee0$0c00a8c0@Artem> <eskka8$adn$1@sea.gmane.org><001801c7603a$5339e020$0c00a8c0@Artem> <eskpd1$sm4$1@sea.gmane.org> <20070307105144.1d4a382f@daydream.goid.lan><002801c760e2$5cb5eb50$0c00a8c0@Artem> <esmvnp$khs$1@sea.gmane.org><005b01c760e6$9a798bf0$0c00a8c0@Artem> <esn2s6$1i9$1@sea.gmane.org> <001601c760ee$f76fa300$0c00a8c0@Artem> <45EF2215.2080402@fluffles.net> <007901c760fc$71e708a0$0c00a8c0@Artem> <45EF93E5.50804@fluffles.net>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig30E3ABF62547DEBAD4BF1128 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Fluffles wrote: > gstripe (4 disks on nVidia controller [Embedded], 128KB stripesize, Tes= t > System 1) > -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- > DD benchmark(1GB) Results in MB/s avg > -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- > 4k READ 47.1 46.9 46.8 46.9 > WRITE 40.9 40.9 41.0 40.9 > 16k READ 92.7 92.8 92.6 92.7 > WRITE 76.3 76.1 76.2 76.2 > 64k READ 120.8 120.6 120.6 120.6 > WRITE 96.1 96.2 96.1 96.1 > 128k READ 123.0 122.8 122.8 122.8 > WRITE 96.3 96.4 96.2 96.3 > 1m READ 122.7 122.9 122.6 122.7 > WRITE 89.4 89.4 89.4 89.4 So, writing to a striped set is 37% faster than reading... > geom_raid5 with 8 SATA disks (128KB stripe, graid5-tng, Test System 2) > -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- > DD benchmark(1GB) Results in MB/s avg > -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- > 4k READ 58.1 58.7 59.0 58.6 > WRITE 155.5 155.8 154.3 155.2 > 16k READ 130.0 125.6 129.5 128.3 > WRITE 308.5 306.3 306.9 307.2 > 64k READ 183.8 183.9 188.9 185.5 > WRITE 416.9 416.7 415.8 416.4 > 128k READ 197.3 194.4 197.6 196.4 > WRITE 421.0 426.2 399.7 415.6 > 1m READ 193.0 196.8 198.1 195.9 > WRITE 327.6 330.3 331.0 329.6 >=20 Similar here: 69% faster, even though writing to RAID5 involves block ECC (XOR probably) calculations and writing to at least two disks, and reading doesn't. Interesting. Any ideas why? (anybody?) --------------enig30E3ABF62547DEBAD4BF1128 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) Comment: Using GnuPG with Thunderbird/FreeBSD - http://enigmail.mozdev.org iD8DBQFF7+onldnAQVacBcgRAo17AKDxNLugrzTtYMEZiUF/NucvxTcR2QCglwkg tJ7KMLP6zXJj0SVPtLZBYLA= =Tw7/ -----END PGP SIGNATURE----- --------------enig30E3ABF62547DEBAD4BF1128--
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