Andre Majorel wrote: > With LVM, you can create a snapshot of the block device at any > time, mount the snapshot read-only (looks like another block > device) and backup that. Ensuring consistency at application level > is still up to you but at least, if that involves stopping > services, the unavailability window is greatly reduced.
Hmm. And 1 out of 10 times it will completely *nuke* your data. Not just the new snapshot you've just created, mind you, but also the volume you're snapshotting. I'm talking from experience. That's a "stable" version of LVM I'm talking about, and it was a fresh install from the most recent RedHat distro too. A week ago I compiled my own version of kernel/device-mapper tools/lvm from the newest sources I could find. It didn't trash my data, but 1/4 times it created an unusable snapshot. I've personally burn-in tested the hardware and there's absolutely no problems there. It's a standard server from HP, naturally not overclocked or anything like that. It's apparently a known fact that the code is wildly unstable, so stay away from it if you happen to like your data :-). - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
