|
June 23rd, 2009
jimbojones
 | 08:53 pm - ZFS and RAIDZ performance
A comment on the Ars Technica Linux Kung Fu forum a couple of weeks ago got me curious - a user there said that as far as he knew, RAIDZ was not supposed to be a performance configuration, with RAIDZ performance not much better, on average, than that of any single disk in the RAIDZ.
I just happened to have a RAID storage server in the shop that was due for a complete wipe anyway, so I decided to take the opportunity to do some benchmarking. Somewhat to my surprise, ZFS turned out to be quite a good performer - despite its advanced data-protection features, it was the fastest filesystem tested for single-process reads, with or without RAIDZ. RAIDZ did quite well too; on multiple concurrent reads it is significantly slower than RAID5/ext3, but still manages to nearly double single-drive performance across the board.
( specs and full-size graphs behind the cut )
|
|
|
