Il 22/03/13 11:00, Traffanstead, Mike ha scritto:
May I ask why you're running ZFS on top of a RAID array? That's not
recommended. One of the advantages of ZFS is that it balance disk
activity across devices but when put it on top drives that at are
already raided it loses that insight and may end up scheduling
reads/writes that all land on the same device. The only case where
it's okay to do this is if you mirroring individual disks (e.g.
several RAID-1 devices) and even that's arguable.
Hi,
we tried different approaches to a /DATA partition (before trying using
a ZFS /DATAZFS partition):
- an UFS partition (/DATA) on hardware raid10;
- a ZFS on hardware raid10;
- a ZFS mirror on two hardware stripes;
The UFS filesystems performed at 400MBps without any tweak while ZFS
performed at 400MBps after tweaks.
So I don't think that these levels of performaces are related to file
system.
Thanks,
d.
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