report "update"
$RRDTOOL graphv - \
--start 920804400 --end 920808000 \
- DEF:myspeed=$RRD:speed:AVERAGE \
- CDEF:nonans=myspeed,UN,0,myspeed,IF \
- CDEF:kmh=nonans,3600,* \
+ DEF:my-speed=$RRD:speed:AVERAGE \
+ CDEF:nonans01=my-speed,UN,0,my-speed,IF \
+ CDEF:kmh=nonans01,3600,* \
CDEF:fast123456789012345678901234567890=kmh,100,GT,100,0,IF \
CDEF:over=kmh,100.000000000000000000000000000000000000,GT,kmh,100,-,0,IF \
CDEF:good=kmh,100,GT,0,kmh,IF \