On Tue, 9 Sep 2008, Magnus Hagander wrote:
As long as your SAN guarantees an atomic snapshot of all your data (which every SAN I've ever heard of guarantees if you're on a single volume - entry level SANs often don't have the functionality to do multi-volume atomic snapshots, though), you don't need to set up PITR for simple backups
It's all those ifs in there that leave me still recommending it. It's certainly possible to get a consistant snapshot with the right hardware and setup. What concerns me about recommending that without a long list of caveats is the kinds of corruption you'd get if all those conditions aren't perfect will of course not ever happen during testing. Murphy says that it will happen only when you find yourself really needing that snapshot to work one day.
-- * Greg Smith gsmith@xxxxxxxxxxxxx http://www.gregsmith.com Baltimore, MD
