On Sat, Oct 27, 2012 at 4:08 AM, Morris Hooten <mhoo...@us.ibm.com> wrote:
> I'm creating a zpool that is 25TB in size.
> What are the recommendations in regards to LUN sizes?
> For example:
> Should I have 4 x 6.25 TB LUNS to add to the zpool or 20 x 1.25TB LUNs to
> add to the pool?
> Or does it depend on the size of the san disks themselves?

More like "you shouldn't let the SAN mess with the disks and let zfs
see the disks as JBOD".

... but then again, your SAN might not let you do that. So my
suggestion is actually just present one huge 25TB LUN to zfs and let
the SAN handle redundancy.

Or if your SAN can't do it either, just let it give
whatever-biggest-size LUN that it can, and simply use stripe on zfs

> Or should I divide the zpool up and make several smaller zpools?

If you're going to use them for a single purpose anyway (e.g. storing
database files from a single db, or whatever), I don't see the benefit
in doing that.

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