Date: Wed, 16 Apr 2008 22:20:58 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-performance@freebsd.org Subject: Re: ZFS, Dell PE2950 Message-ID: <fu5n3b$vm6$1@ger.gmane.org> In-Reply-To: <4806221C.20202@umich.edu> References: <480548CF.5080104@umich.edu> <fu4f1u$81f$1@ger.gmane.org> <4806221C.20202@umich.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigBA51353FEBBD3C8D1F09D96B Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Benjeman Meekhof wrote: > Sure, here is an example iozone output when I tested UFS2. Same=20 > hardware config as with ZFS test. >=20 > #gstripe label -v -s 128k test /dev/mfid0 /dev/mfid2 > #newfs -U -b 65536 /dev/stripe/test >=20 >=20 > "Throughput report Y-axis is type of test X-axis is number of processes= " > "Record size =3D 512 Kbytes " > "Output is in Kbytes/sec" >=20 > " Read " 505978.28 546837.12 565786.34 310994.23=20 > 309813.64 329930.91 351162.15 376940.64 408561.11 432157.69=20 > 452106.75 470176.39 >=20 > " Re-read " 523917.72 581796.50 592393.28 314724.70=20 > 308485.12 327409.40 350913.96 381370.12 408105.25 434168.93=20 > 458742.49 475407.44 This is hard to compare to what you've posted before, but if it means=20 that with ZFS you get 136 MB/s and with UFS 300-593 MB/s, something is=20 wrong. Per my discussion with Scott Long Can you repeat the test for UFS, but=20 create gstripe with a really small stripe size, like 4 KB? > -Ben >=20 > Ivan Voras wrote: >> Benjeman J. Meekhof wrote: >>> Hi, >>> >>> I posted earlier about some results with this same system using UFS2.= >>> Now trying to test ZFS. This is a Dell PE2950 with two Perc6 >>> controllers and 4 md1000 disk shelves with 750GB drives. 16GB RAM, d= ual >>> quad core Xeon. I recompiled our kernel to use the ULE scheduler inst= ead >>> of default. >>> >>> I could not get through an entire run of iozone without a system >>> reboot/crash. ZFS is clearly labeled experimental, of course. >>> >>> It seems to die for sure around 10 processes, sometimes less (this is= >>> the end of my output from iozone): >>> >>> Children see throughput for 10 readers =3D 135931.72 KB/se= c >>> Parent sees throughput for 10 readers =3D 135927.2= 4=20 >>> KB/sec >>> Min throughput per process =3D 13351.2= 6=20 >>> KB/sec >>> Max throughput per process =3D 14172.0= 5=20 >>> KB/sec >>> Avg throughput per process =3D 13593.1= 7=20 >>> KB/sec >>> Min xfer =3D 31586816.= 00 KB >> >> Can you tell us how does this compare to UFS2 results you posted >> previously? (since you used dd for UFS2 and now iozone for ZFS; what a= re >> your conclusions?) >> >=20 > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to=20 > "freebsd-performance-unsubscribe@freebsd.org" >=20 --------------enigBA51353FEBBD3C8D1F09D96B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIBl+qldnAQVacBcgRAkD9AKCQhi9EhJDYGWjjUXtn049XL5KJuQCgh+xZ eCSZf8GKbzZOE2gSJJMXaNo= =+qTO -----END PGP SIGNATURE----- --------------enigBA51353FEBBD3C8D1F09D96B--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?fu5n3b$vm6$1>