[rrd-users] False positives with aberrant behavior detection

Tobias Oetiker tobi at oetiker.ch
Wed Aug 18 17:57:58 CEST 2010

Hi Dave,

> It does seem that the current implementation differs from what I
> was using in rrdtool c. 2002.  My recollection was that there was
> the ability to widen the confidence band by a parameter and also to
> have different settings for the upper vs. lower bound offset from
> the forecast value.
> BTW, there is another implementation described here:
>    http://www-iepm.slac.stanford.edu/monitoring/forecast/hw.html

the implementation has  not changed except that more features have
been added ... note that some of the tunables are only accessible
via rrdtool tune ... (one might consider that to be a non optimal


Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900

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