rrdtool create power.rrd --step 60 --no-overwrite \
DS:counter:GAUGE:86400:0:1000000 \
DS:consum:ABSOLUTE:86400:0:1000000 \
RRA:LAST:0.5:1:4320 \
RRA:AVERAGE:0.5:1:4320 \
RRA:LAST:0.5:1440:30 \
RRA:AVERAGE:0.5:1440:30 \
RRA:LAST:0.5:10080:520 \
RRA:AVERAGE:0.5:10080:520