#!/usr/bin/python
import sys
import rrdtool

ret = rrdtool.create("latency_db.rrd", "--step", "300", "--start", '0',
 "DS:input:COUNTER:600:U:U",
 "DS:output:COUNTER:600:U:U",
 "RRA:AVERAGE:0.5:1:600",
 "RRA:AVERAGE:0.5:6:700",
 "RRA:AVERAGE:0.5:24:775",
 "RRA:AVERAGE:0.5:288:797",
 "RRA:MAX:0.5:1:600",
 "RRA:MAX:0.5:6:700",
 "RRA:MAX:0.5:24:775",
 "RRA:MAX:0.5:288:797")

if ret:
    print rrdtool.error()