[rrd-users] Calculating percentages over time

[tallen at csc.sctboces.org]

Hi, 

I'm new to the list, but I did search the archives before asking.  I'm 
graphing different subnets for billing purposes.  Using GPRINT, I can get 
AVERAGE bandwidth by subnet and in total, over the period of the graph, 
easy.  I can calculate the % used then by that subnet, again easy.  But if 
I do the percentages in the graph, the numbers get skewed, because it does 
an AVERAGE percentage, rather than a percentage of the averages.  In other 
words, if one subnet is active all night long, and no one else is on, that 
subnet gets billed for 100% usage for the entire night, irregardless of 
how much bandwidth they actually used.  I have a graph where 2 subnets 
used the same bandwidth, but one is 17% and the other 26%!  Is it possible 
to do math in the GPRINT statement?  This seems the easiest way to do the 
calculation.  Is there another way I can get the bandwidth:AVERAGE divided 
by the total:AVERAGE?

Thanks,

Tom

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