>Is there a way to get the total amount of data referenced by a snapshot that
>isn't referenced by a specified snapshot/filesystem? I think this is what is
>really desired in order to locate >snapshots with offending space usage. The
>written and written@ attributes seem to only do the rever
I went ahead and hacked this script together, so let me elaborate. First,
though, a teaser:
$ ./snapspace.sh mainpool/storage
SNAPSHOTOLDREFS UNIQUE UNIQUE%
zfs-auto-snap_monthly-2011-11-14-18h59 34.67G 11.0G 31%
zfs-auto-snap_monthly-2011-12-1
