Alex van den Bogaerdt <[email protected]> wrote:
> As before: don't write to RRDtool unless the value tipped over to the next
> number. There won't be spikes. The amount of rain will be divided by the
> amount of seconds since the last update.
So use derive data type, write 0.5 (or any larger value that's accumulated)
followed by 0 whenever the counter tips over ?
Guess we need to write 0 periodically to avoid getting long periods of unknown.
So we end up with :
forever
read value
if value > min
reset counter
reset timer
write T:value to rrd
writeT+1:0 to rrd
else
if timer > some_period
write T:0 to rrd
reset timer
sleep for a bit
go back and do it all again
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