root@swamp:/swamptank/scripts# ./zfsSnap.sh
./zfsSnap.sh [create|destroy] [snapshotName] [olderThan]
root@host:~# ./zfsSnap.sh create tank/media@minute
root@host:~# ./zfsSnap.sh destroy tank/media@minute 60
Hourly
0 * * * * /tank/scripts/zfsSnap.sh create tank/media@hourly
0 * * * * /tank/scripts/zfsSnap.sh destroy tank/media@hourly 3600
Daily
@daily /tank/scripts/zfsSnap.sh create tank/media@daily
@daily /tank/scripts/zfsSnap.sh destroy tank/media@daily 86400
Weekly
@weekly /tank/scripts/zfsSnap.sh create tank/media@weekly
@weekly /tank/scripts/zfsSnap.sh destroy tank/media@weekly 604800
Monthly
@monthly /tank/scripts/zfsSnap.sh create tank/media@autoMonthly
** Keep monthly for 15552000 (6 months) **
@monthly /tank/scripts/zfsSnap.sh destroy tank/media@autoMonthly 15552000
3600 seconds is 1 hour | 86400 seconds is 24 hours | 604800 seconds is 7 days