Software RAID issues (was Re: Suggestions solicited, server bring up)

[Alan Johnson]

On Mon, Nov 23, 2009 at 4:38 PM, Bill McGonigle <bill at bfccomputing.com>wrote:

> > On 23-Nov-2009, Alan Johnson <alan at datdec.com> sent:
>
> > Nope. As I understand it, when you do an iSCSI export of a ZFS
> > pool, you're getting a block device with the advantages of the
> > ZFS storage mechanism without any particular filesystem on it.
> >
> > I could be wrong, of course. I haven't played with that part
> > of ZFS yet.
>
> Quite right.  You get the block management of ZFS but not the nice
> filesystem semantics.
>

Nice!  Ok, so you get the multi-level, compression, encryption, error
checking, and RAIDZs?  Anything else significant I am forgetting?

Can ZFS take an iSCSI block device as a pool member?  (Did I use pool right
there?  Like and LVM volume group, right?)  If so, risk of infinite
recursion asside, that could be a very powerful way to leverage a local
FusionIO device to buffer an iSCSI storage cloud/SAN.
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