#`date -v -1d +"$type%Y-%m-%d"`

pool="zvol1/vol1"

# iterate i from 15 to 62
# any snapshot older than 2 weeks (14 days) or (15-62 days) old is deleted
for i in 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
do
        CLEANDATE=`date -v -${i}d +"$type%Y-%m-%d"`

        CLEAN_SNAP="${pool}@${CLEANDATE}"
        #echo $CLEAN_SNAP
        if zfs list -H -o name -t snapshot | sort | grep "$CLEAN_SNAP" > /dev/null;
        then
                zfs destroy -r $CLEAN_SNAP
        fi
done