[rrd-users] Re: Data Averaging

Serge Maandag serge.maandag at staff.zeelandnet.nl
Wed Feb 16 21:17:14 MET 2005

> Here is the content of the rrd db :
> rra[0].cf = "AVERAGE"
> rra[0].rows = 140160
> rra[0].pdp_per_row = 1
> rra[0].xff = 5.0000000000e-01

This seems o.k.

> Perhaps, you could 
> suggest a better way to graph long time series that would 
> solve the problem ?

I assumed you were suffering from averaging when values are 
travelled from a high resolution RRA to a coarser RRA.

I think in this case you are suffering from another type
Of averaging. You plot more rows horizontally than your graph 
Is wide. The solution is of course to plot a wider graph then.

But if that is not a solution, you might ask yourself what you
Do want to see. The maximum in the period covered by that pixel?

If so, changing the type of the AVERAGE RRA to a MAX RRA may work.
Rrdtool dump, edit to change the RRA type and rrdtool restore
Should do it.


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