Quick and lazy RRDTool padding

pad.rb

#!/usr/bin/env ruby

# pad an RRD with 5-minute data covering 24 hours 
# starting yesterday 

time = Time.now.to_i - 86400 

288.times do 
  time = time + 300
  puts "rrdtool update test.rrd #{time}:#{rand(1..64)}"
  system("rrdtool update test.rrd #{time}:#{rand(1..64)}")
end