script to create backup images

snapshots.rb

#!/usr/bin/ruby

class Integer
  def days; hours * 24; end
  def hours; minutes * 60; end
  def minutes; seconds * 60; end
  def seconds; self; end
end

def snapshot(name)
  system "zfs destroy -r FileHub@#{name}"
  system "zfs snapshot -r FileHub@#{name}"
end

today = Time.new # Time.local(2009,1,1)
time = today - 1.days

# Take monthly snapshot for prior month on 1st of month
snapshot "m%02d" % time.month if today.day == 1

# Take daily snapshot
snapshot "d%02d" % time.day