[mrtg] newby: using mrtg with an external rrd

[Robert Queck]

Hi together!

I am quite a newby with mrtg and rrd and I am trying to evaluate the 
opportunities given by these tools.

My problem right now ist that I try to visualize an already built-up rrd 
database with the mrtg-rrd cgi-script, so to speak to use mrtg only as 
the frontend first.

since the cgi script is returning an error like:

Error: RRDs::graph failed, the RRD does not contain an RRA matching the 
chosen CF

I think that either mrtg has a strict standard for these archives or I 
did not describe them in the config-file properly (which would not be 
surprising since I have not found a way to do this).


Questions:   Has anyone of you done something similar?

                       Is it possible to describe the RRAs of an rrd 
file explicitly in the mrtg config file?
                       (probalby indirectly, e.g. target descriptions 
that make the cgi-script accepting an proprietary rrd)


Hope this is not too far of the edge. If there is already a description 
of this problem, please give me a reference since I read all tutorials I 
found.

Many Thx in advance,
Robert Queck

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