[rrd-users] Usual RRD question on AVERGAE, MAX and consolidation :)

James Bensley jwbensley at gmail.com
Thu Dec 19 17:35:41 CET 2013

Hi Johan,

Many thanks for the reply. Does RRD draw graphs as one CDP per pixel?
As a simple example; to produce a month graph taking samples every 300
seconds (5 minutes) I would need a graph 8640 pixels wide; 30 (days in
a month, or 31) * 24 (hours in a day) * 12 (5 minute samples in one
hour) = 8640, is that logic correct?

If I am producing graphs say 864 pixels wide then we are consolidating
10 CDPs into each pixel, in this instance when using
DEF:ds0=my.rrd:ds0:MAX we choose the highest of the 10 samples to be
used in that one pixel?

I am graphing with RRD for billing customers based on traffic usage so
I want this value to be as high as possible (without being higher than
what they actually used), otherwise I am under-billing.

Kind regards,

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