Tobias Weingartner wrote:
> 
> One solution is to put up a NaN every time the counter rolls around
> or is reset.  At least I've found that to be more acceptable than
> the other way around...
> 
> Wish rrdupdate had an option to put up NaN's (don't do counter
> wrap-around calculation) when the counters reset/wrap.

If you use DERIVE, the counter can go back and forward. That means
wrap-around calculation isn't there, you just receive a negative
number.  Now, if you don't allow negative numbers by setting the
minimum allowed value to 0, you get a NaN instead.

Et voila, exactly what you wish :)

cheers,
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