Richard Elling wrote: > Joseph Zhou wrote: > >> Yeah? >> http://www.adaptec.com/en-US/products/Controllers/Hardware/sas/value/SAS-31605/_details/Series3_FAQs.htm >> Snapshot is a big deal? >> >> > > Snapshot is a big deal, but you will find most "hardware" RAID > implementations > are somewhat limited, as the above adaptec only supports 4 snapshots and > it is an > optional feature. You will find many array vendors will be happy to > charge lots > of money for the snapshot feature.
On top of that since the ZFS snapshot is at the file system level it's much easier to use. You don't have to quiesce the file system first or hope that when you take the snapshot you get a consistent data set. I've seen plenty of folks take hw raid snapshots without locking the file system first, let alone quiescing the app, and getting garbage. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
