Date: Wed, 16 Apr 2008 11:58:20 -0400 From: Benjeman Meekhof <bmeekhof@umich.edu> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: ZFS, Dell PE2950 Message-ID: <4806221C.20202@umich.edu> In-Reply-To: <fu4f1u$81f$1@ger.gmane.org> References: <480548CF.5080104@umich.edu> <fu4f1u$81f$1@ger.gmane.org>
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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" " Initial write " 576953.38 613457.19 627091.58 626818.95 641763.54 626005.11 579073.92 553088.47 557498.71 556188.95 553340.92 548801.62 " Rewrite " 580755.31 621562.75 638209.55 573171.69 633114.27 616501.92 542520.70 541662.21 525603.64 529194.37 506230.25 490589.89 " 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 -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?) >
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