zfs snapshots

bash-3.2# zfs list -t snapshot
no datasets available
bash-3.2# zfs snapshot -r zdata@SNAPSHOT_CTDBPRD_ORACLE_10.2.0.3_BASE_INSTALL_31_07_2013
bash-3.2# zfs list -t snapshot
NAME USED AVAIL REFER MOUNTPOINT
zdata@SNAPSHOT_CTDBPRD_ORACLE_10.2.0.3_BASE_INSTALL_31_07_2013 0 – 36K –
zdata/home@SNAPSHOT_CTDBPRD_ORACLE_10.2.0.3_BASE_INSTALL_31_07_2013 0 – 64.9M –
zdata/logs@SNAPSHOT_CTDBPRD_ORACLE_10.2.0.3_BASE_INSTALL_31_07_2013 0 – 32K –
zdata/opt@SNAPSHOT_CTDBPRD_ORACLE_10.2.0.3_BASE_INSTALL_31_07_2013 0 – 33.1M –
zdata/opt_oracle@SNAPSHOT_CTDBPRD_ORACLE_10.2.0.3_BASE_INSTALL_31_07_2013 0 – 2.09G –