> Heh :-)  Well, let's say in a given city you might have
> 120 Targets you need to collect data from.  But, what
> if you want to Look at the sum of all those Targets
> in one graph?  An obvious route would be to maintain an
> RRD from the sum of all those Targets.  However, since
> I didn't start of that route I do not have the historical
> data for the sum.  It's imperitive that I have this
> data to represent that sum view.  If anyone knows an easy
> way to extract data from multiple RRDs and place each
> sample into a collective RRD then it would be a better
> approach.  The graph function is totally dynamic since

Perhaps I missed something but what is wrong with:

DEF:val1a=rrdfile1.rrd:val1:AVERAGE
DEF:val1b=rrdfile1.rrd:val2:AVERAGE
DEF:val2a=rrdfile2.rrd:val1:AVERAGE
DEF:val2b=rrdfile2.rrd:val2:AVERAGE
...
DEF:valNa=rrdfileN.rrd:val1:AVERAGE
DEF:valNb=rrdfileN.rrd:val2:AVERAGE
CDEF:total=val1a,val1b,val2a,val2b,val......valNa,valNb,+,+,+,+,+,+,...

to just display the total ? Or do you also need to store the samples
when summed together ?

Regards,
Alex

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