zfs-autosnap.sh

#! /bin/sh

for pool in `zpool list -H -o name`; do
  zfs snapshot -r $pool@auto:`date "+%FT%T"`

  zfs list -H -t snapshot -o name | grep $name@auto: | \
   sed -e 's/.*auto://' | sort -r | uniq | tail +14 | \
   while read name; do
    zfs destroy -r $pool@auto:$name
   done
done