http://www.geocities.co.jp/SiliconValley-Bay/1428/rrd.html http://cc.ii2.cc/~fors/sysworks/data/rrdtool/rrdcreate.txt http://www.watch.impress.co.jp/akiba/hotline/20000701/etc_694dpro.html http://bennyhills.fortunecity.com/burns/294/index.…