Date: Tue, 15 Apr 2008 20:31:11 -0400 From: "Benjeman J. Meekhof" <bmeekhof@umich.edu> To: freebsd-performance@freebsd.org Subject: ZFS, Dell PE2950 Message-ID: <480548CF.5080104@umich.edu>
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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
Some zpool info below - each volume below is a raid6 of 30PD on one
controller. I may try different hardware volume configs for fun.
zpool create test mfid0 mfid2
# pool is automatically mounted at /test
# pool: test
# state: ONLINE
# scrub: none requested
#config:
#
# NAME STATE READ WRITE CKSUM
# test ONLINE 0 0 0
# mfid0 ONLINE 0 0 0
# mfid2 ONLINE 0 0 0
#
#errors: No known data errors
-Ben
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