Re: [Xen-users] Linux Fiber or iSCSI SAN

[Gordan Bobic <gordan@xxxxxxxxxx>]

On Thu, 13 Jun 2013 14:42:54 +0000, Anastas Semenov 
<anastas.semenov@xxxxxxxxx> wrote:

> While 10 drive raidz1 is not most optimal, it is still pretty close 
> to
> recommended 4-8 drives.
Pretty close is not really much better than any other imperfect value.
This is because ZFS stores data in vriable length stripes that can
only be powers of 2 <= 128KB. This means that you should keep your
RAIDZ's small and close to the optimal data+parity disk counts.

Then again, any RAIDZ[123] is going to be slow enough that you
probably won't be able to tell much difference (much like RAID[56]).

Gordan

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