On 09/26/2011 07:17 PM, Edward Ned Harvey wrote:
So, this all serves to rather emphasize my point, which is to say... (LVM) Create snapshot, mount it, monitor it with nagios or whatever, lvextend it, lvextend the filesystem, resize2fs, unmount and release snapshot... versus (ZFS, Netapp, Volume Shadow Services, etc.) Do nothing, and don't worry about it. It's all automatic and dynamic and just works.
I don't think this is right. Running nagios on a snapshot would do nothing. A snapshot is protected from change. Typically, what you would do is this:
Create a volume, monitor it, create a snapshot to get a "point in time" image of the volume, backup the snapshot, and then remove the snapshot.
Pretty much the same model as the other things.
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