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I have a Munin setup that monitors some data from our database about the number of sales. My munin plugin extracts this data from the database with a query. I could run this query for any time in the past to see what the output would have been had I had the munin plugin then. Is there anyway to add in old data to the munin graph? Given a timestamp and some data for that timestamp, can I add it to the rrd file?

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up vote 6 down vote accepted

Export rrd to XML(use rrdtool dump), edit XML file. Then export XML to rdd(use rrdtool restore).

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That's nice, I didn't knew about that one. Makes things a lot easier. – Sven Feb 7 '11 at 12:51

Given a bit of scripting foo, this is doable. See , and add changes according to the comment about speed.

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