As I mentioned in my previous post, which is already 2 months old :(, I'm using snapshots for data retention.
Now I run up in the situation, that I wanted to know how full the snapshots are. A 'normal' df will not work... but I figured it out! The command lvs is willing to do the work:
# lvs --aligned --separator | vol_backup
LV |VG |Attr |LSize |Origin|Snap% |Move|Log|Copy% |Convert
lvm0 |vol_backup|owi-ao|40.00G| | | | | |
snap-20100412_2350|vol_backup|swi-a-| 4.00G|lvm0 | 23.71| | | |
snap-20100413_2350|vol_backup|swi-a-| 4.00G|lvm0 | 21.70| | | |
snap-20100414_2350|vol_backup|swi-a-| 4.00G|lvm0 | 19.52| | | |
snap-20100415_2350|vol_backup|swi-a-| 4.00G|lvm0 | 17.53| | | |
snap-20100416_2350|vol_backup|swi-a-| 4.00G|lvm0 | 15.54| | | |
snap-20100417_2350|vol_backup|swi-a-| 4.00G|lvm0 | 13.56| | | |
snap-20100418_2350|vol_backup|swi-a-| 4.00G|lvm0 | 11.56| | | |
snap-20100419_2353|vol_backup|swi-a-| 4.00G|lvm0 | 9.02| | | |
snap-20100420_2353|vol_backup|swi-a-| 4.00G|lvm0 | 6.76| | | |
snap-20100421_2350|vol_backup|swi-a-| 4.00G|lvm0 | 2.79| | | |
In the 'Snap%' column you can see how full your snapshot volume is!
