* Frank Ludolph (Frank.Ludolph at Sun.COM) wrote: > I definitely don't see how TS is in any way related to ZFS mirroring for > whatever it's worth. > > > TS is all about data backup. This first release, which uses snapshots, was > only able to address certain types of failures (accidental deletion and > software-based file corruption). Future releases will protect against > hardware failures. Mirroring is the primary approach being considered, > rather than ZFS backup, because it protects more completely (real-time > self-healing, up to the moment backup, run-time disk failure, alternate > backup device).
I get all of that, except mirroring is not a backup. None of the raid modes are. Not in any serious storage conversation I've ever had or listened to. Mirroring is about availability which is very different from restoring from data loss. And I'm by no means a storage expert. So, based on that, I don't see how it's even remotely related to TS. I would further postulate that we need to get our ZFS backup story figured out (other than use commercially available 3rd party solutions) if TS's goal is to handle that sort of thing (backups). But relying on mirroring isn't the answer imho. Cheers, -- Glenn
