# http://docs.sun.com/app/docs/doc/819-5461/gbcya?a=view

root@opl:~# zfs snapshot zfs/vz@`date +%Y-%m-%d_%H:%M:%S`

root@opl:~# zfs list
NAME                         USED  AVAIL  REFER  MOUNTPOINT
zfs                         85.5G  12.4G  6.92G  /zfs
zfs/install                 6.40G  12.4G  6.40G  /zfs/install
zfs/vz                      72.2G  12.4G  72.2G  /zfs/vz
zfs/vz@2009-05-01_14:41:50      0      -  72.2G  -