rrdtool create power.rrd --start 1184626800 --step 1 \
DS:Power:GAUGE:6000:0:60000 \
RRA:AVERAGE:0.5:1:115200 \
RRA:AVERAGE:0.5:60:1400 \
RRA:AVERAGE:0.5:240:1550 \
RRA:AVERAGE:0.5:1440:3000 \
RRA:AVERAGE:0.5:2880:4000 \
RRA:MAX:0.5:1:115200 \
RRA:MAX:0.5:60:1400 \
RRA:MAX:0.5:240:1550 \
RRA:MAX:0.5:1440:3000 \
RRA:MAX:0.5:2880:4000 \
RRA:MIN:0.5:1:115200 \
RRA:MIN:0.5:60:1400 \
RRA:MIN:0.5:240:1550 \
RRA:MIN:0.5:1440:3000 \
RRA:MIN:0.5:2880:4000


update power.rrd <time|N> <value>

#!/bin/sh
#if [ `wc -l </tmp/powercount` -lt 20 ]
#then
#   echo 1 >>/tmp/powercount
#   exit
#else
#   rm /tmp/powercount
#   touch /tmp/powercount
#fi


HOMEDIR="/var/www/localhost/htdocs/power"
cd $HOMEDIR
RRD="rrdtool"
DB="/mnt/data/routerdev/powertest/power.rrd"
COMMENT="Generated on `date "+%d %m %y %H\:%M\:%S %Z"`"
IMAGE="power.png"
width=1000
height=600

for time in 60m 3h 24h 48h 8days 1month 1year
do
        PERIOD="$time"
        averageperiod=1
        if [ "$time" == "1year" ]
        then
            averageperiod=604800
        fi
        if [ "$time" == "1month" ]
        then
            averageperiod=120960
        fi

        rrdtool graph `echo $PERIOD | tr ' ' '_'`_power.png -A -a PNG \
        -e NOW \
        -s -$time \
     -t "Power use for $PERIOD" \
         -w $width \
         -h $height \
         -v "Power (w)" \
        -r \
     DEF:Power=$DB:Power:AVERAGE \
     VDEF:PowerMin=Power,MINIMUM \
     VDEF:PowerAveVal=Power,AVERAGE \
     CDEF:PowerAve=Power,$averageperiod,TREND \
     COMMENT:"\t\t now      avg      max         min"\\n \
     LINE1:PowerAve"#AAAAFF:Power" \
     GPRINT:Power:LAST:"%7.1lfw" \
     GPRINT:Power:AVERAGE:"%7.1lfw" \
     GPRINT:Power:MAX:"%7.1lfw" \
     GPRINT:Power:MIN:"%7.1lfw"\\n \
     HRULE:PowerMin"#999999:Minimum" \
     HRULE:PowerAveVal"#6666FF:Average" \


done