> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Chris Dunbar
>
> like to clarify something. If read performance is paramount, am I
> correct in thinking RAIDZ is not the best way to go? Would not the ZFS
> equivalent of RAID 10 (striped mirror sets) offer better read
> performance? In this case, I realize that Jason also needs to maximize
> the space he has in order to store all of those legitimately copied
> Blu-Ray movies. ;-)
During my testing, for sequential reads using 6 disks, I got these numbers:
(normalized times performance of a single disk)
Stripe of 3 mirrors: 10.89
Raidz 6disks: 9.84
Raidz2 6disks: 7.17
Where any number >2 would max out a GigE.
The main performance advantage of the stripe of mirrors is in the random
reads, which aren't very significant for Jason's case.
http://nedharvey.com/iozone_weezer/bobs%20method/iozone%20results%20summary.
pdf
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