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read benchmarks: ufs/zfs/ext3 raidz/raid5 Dan Naumov Wed Jun 24 14:00:37 2009 

Another FreeBSD person on a forum I frequent did some read benchmarks
on his system: Athlon64 3500+ with 2GB DDR2 SDRAM, a WD 250GB system
drive, and 5 Seagate Barracuda 750GB SATA-II data drives. ZFS and UFS
testing was done using FreeBSD 7.2-RELEASE amd64, and ext3 testing was
done using Ubuntu Server 8.04-LTS amd64. The used disks do not support
NCQ, so there is no "NCQ advantage" on the Linux side.

Random Access reads, 5MB chunks:
http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-untuned-5mb.png
Random Access reads, 1MB chunks:
http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-untuned-1mb.png
Random Access reads, 5MB chunks (big list):
http://virtual.tehinterweb.net/livejournal/raid_performance/raid-diskperf-5mb-all.png

Here is the original forum discussion thread:
http://episteme.arstechnica.com/eve/forums/a/tpc/f/96509133/m/857002910041


Sincerely,
- Dan Naumov
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