From a conversation on Freenode's #LVM
snaphost monitoring - it writes warning to syslog (it is "preview" and must be explicitly activated)" - isn't a warning that must be explicitly activated and then monitored for, and escalated, rather timid for such an important event? Also, does LVM have a way of sending a message to the administrator to warn of the impending overflow?
there must be dmeventd running, then (if configuted in lvm.conf) it monitors all snapshots automatically and prints warning on some % of snapshot fill - to warn before overflill. * you could probably schedule something to use 'lvs'
what if the size of the changes exceeds the size of the snapshot volume? Is there a way to automate the removal of the snapshot once the backup is done?
- if the size of changes exceeds the size of the snapshot, you're SOL. the snapshot is gone
- as to removing the snapshot once the backup is done, that's up to your backup solution, not lvm