----- "Tony Schreiner" schreian@bc.edu escreveu:
When the snap shot volume is mounted, yes you can do df on it. But that shows you the state of the volume you take the snapshot of at the time of the snapshot. That's not what I want to know.
Sorry to answer my own question, but I just learned, lvdisplay shows the amount currently used by the snapshot
#lvdisplay /dev/vg_data/lv_backup
Hi Tony,
You can use "lvs" too:
#lvs LV VG Attr LSize Origin Snap% Move Log Copy% home sys -wi-ao 2.00G opt sys owi-ao 250.00G root sys -wi-ao 1.50G usr sys -wi-ao 1.50G var sys -wi-ao 2.00G zcssnap sys swi-ao 150.00G opt 0.24 zimbrabkp sys -wi-ao 150.00G
"zcssnap" is a snapshot of "opt", and during the time spent to sync it with "zimbrabkp" the "difference" between "opt" and it's snapshot was 0.24%, I think this is what you are looking for.
Antonio.