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>
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[-- Attachment #1 --] Benjeman Meekhof wrote: > Sure, here is an example iozone output when I tested UFS2. Same > hardware config as with ZFS test. > > #gstripe label -v -s 128k test /dev/mfid0 /dev/mfid2 > #newfs -U -b 65536 /dev/stripe/test > > > "Throughput report Y-axis is type of test X-axis is number of processes" > "Record size = 512 Kbytes " > "Output is in Kbytes/sec" > > " Read " 505978.28 546837.12 565786.34 310994.23 > 309813.64 329930.91 351162.15 376940.64 408561.11 432157.69 > 452106.75 470176.39 > > " Re-read " 523917.72 581796.50 592393.28 314724.70 > 308485.12 327409.40 350913.96 381370.12 408105.25 434168.93 > 458742.49 475407.44 This is hard to compare to what you've posted before, but if it means that with ZFS you get 136 MB/s and with UFS 300-593 MB/s, something is wrong. Per my discussion with Scott Long Can you repeat the test for UFS, but create gstripe with a really small stripe size, like 4 KB? > -Ben > > 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, dual >>> quad core Xeon. I recompiled our kernel to use the ULE scheduler instead >>> 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 = 135931.72 KB/sec >>> Parent sees throughput for 10 readers = 135927.24 >>> KB/sec >>> Min throughput per process = 13351.26 >>> KB/sec >>> Max throughput per process = 14172.05 >>> KB/sec >>> Avg throughput per process = 13593.17 >>> KB/sec >>> Min xfer = 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 are >> your conclusions?) >> > > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to > "freebsd-performance-unsubscribe@freebsd.org" > [-- Attachment #2 --] -----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-----
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