With the restriping: wouldn't it be as simple as creating a new folder/dataset/whatever on the same pool and doing an rsync to the same pool/new location. This would obviously cause a short downtime to switch over and delete the old dataset, but seems like it should work fine. If you're doubling the pool size, space shouldn't be an issue.
On 8/31/08, Ross <[EMAIL PROTECTED]> wrote: > Personally I'd go for an 11 disk raid-z2, with one hot spare. You loose > some capacity, but you've got more than enough for your current needs, and > with 1TB disks single parity raid means a lot of time with your data > unprotected when one fails. > > You could split this into two raid-z2 sets if you wanted, that would have a > bit better performance, but if you can cope with the speed of a single pool > for now I'd be tempted to start with that. It's likely that by Christmas > you'll be able to buy flash devices to use as read or write cache with ZFS, > at which point the speed of the disks becomes academic for many cases. > > Adding a further 12 disks sounds fine, just as you suggest. You can add > another 11 disk raid-z2 set to your pool very easily. ZFS can't yet > restripe your existing data across the new disks, so you'll have some data > on the old 12 disk array, some striped across all 24, and some on the new > array. > > ZFS probably does add some overhead compared to hardware raid, but unless > you have a lot of load on that box I wouldn't expect it to be a problem. I > don't know the T5220 servers though, so you might want to double check that. > > I do agree that you don't want to use the hardware raid though, ZFS has > plenty of advantages and it's best to let it manage the whole lot. Could > you do me a favour though and see how ZFS copes on that array if you just > pull a disk while the ZFS pool is running? I've had some problems on a home > built box after pulling disks, I suspect a proper raid array will cope fine > but haven't been able to get that tested yet. > > thanks, > > Ross > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
