[rrd-users] Experiance in HW forcast

[Reinhard Scheck]

I am interested in some more words, be it help or caveats, on different
ways/examples how to handle forecasting. Not only to use it on my own but to
provide those features for the rrdtool based Cacti project. I would need some
examples to guide our users to handle exactly those questions asked in this
thread.
Having said this, I will participate in some examples and discussions that may
start here.
Reinhard

On 13.05.2012 08:12, Michael Schwartzkopff wrote:
> Hi,
> 
> In the last week I read into the HW forecasting and the implementation in
> the rrdtools.
> 
> After reading a lot there are still some questions open:
> 
> 1) How do I choose the initial values for the fitting parameters alpha,
> beta and gamma?
> 
> in my experiments alpha behaved nicely and it was no problem to find the 
> optimal alpha. But the least square function of gamma in the range of ]0,1[
>  seems to be fractal. So it will be extremely difficult to optimize the 
> parameters. Anybody else with this experience?
> 
> In all samples in the net nobody explains why he choose exactly this 
> parameters. Why?
> 
> 2) Is there any possibility to optimize the fitting parameters to recent
> data? My idea would be to optimize the fitting parameters, create the RRDs
> and to optimize the RRDs from time to time. Any ideas or comments?
> 
> Are there any experts on the list? I would like to start a discussion about
>  making the use of the forecasting in RRDs as simple as creating a plain
> graph.
> 
> Greetings,
> 
> 
> 
> 
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