FreeBSD 9.1 vs CentOS 6.3
davide.damico at contactlab.com
Fri Mar 22 10:06:50 UTC 2013
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.
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
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