[mrtg] Graph history being overwritten

Troy Lea troy_lea at hotmail.com
Thu Jun 29 23:42:30 CEST 2017

With RRD files there is an rrdmerge script that will import the old data into the new files:

I can't find the original download I used but it looks like this one is the same.



The only consideration required is that the architectures of the old machine and new machine must be the same (i.e. x86_64). <https://support.nagios.com/kb/article/nagios-xi-migrate-performance-data.html>

Otherwise you need to export to an XML file first. This KB article explains how to do an export/import https://support.nagios.com/kb/article/nagios-xi-migrate-performance-data.html

Good luck.

From: mrtg <mrtg-bounces+troy_lea=hotmail.com at lists.oetiker.ch> on behalf of Edwin A. Epstein III <ed at rhinobee.com>
Sent: Friday, 30 June 2017 5:01 AM
To: mrtg
Subject: [mrtg] Graph history being overwritten


I find myself needing to restore some graphs after a server died. MRTG is working on a new server without issue, except for the fact it overwrites all files placed on it.

When I copy in the .old and .log files for a target and initiate MRTG it always replaces the entirety of the two files with zeros and the graph history is gone. In some cases, we have graph history going back 2 years or more.

What is the best way to restore these old files? Additionally, what is the best way to merge old data, or two graphs into one?


Edwin A Epstein, III
Rhinobee Internet Services

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.oetiker.ch/pipermail/mrtg/attachments/20170629/7ace656d/attachment.html>

More information about the mrtg mailing list