New answers tagged mrtg
I have found the asnwer, "Each graph is build from the data in its own *.log and *.old files. So if you copy these to your production server you conserve all historic data from the test box. After the copy is complete you can start the MRTG process again." It is well explained in this post: https://lists.oetiker.ch/pipermail/mrtg/2007-October/033185.html ...
Note that the graphs only get updated when they are "out-of-date" mrtg uses the time stamp on the image file to determine this. So you may want to make sure your year graph does not have an odd timestamp ... you may also want to just move it away, then mrtg should re-generate it on the next run.
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