[mrtg] more than in & out values

Steve Shipway s.shipway at auckland.ac.nz
Tue Feb 28 20:01:36 CET 2012

When using MRTG with RRD, you are restricted to two (and exactly two) datasources.  This is a restriction of MRTG, not of RRDTool, so you could manually create an RRD with additional datasources - however, MRTG would not update or read them.

If you are using the Routers2 frontend for MRTG/RRD, then you can have multiples Targets, each with two datasources, and then define a Userdefined graph over them to make a single graph with more than 2 variables.  The component targets can be hidden from the menu.  See the examples for Linux server CPU and network device 'Incoming' graphs at


Steve Shipway
University of Auckland ITS
UNIX Systems Design Lead
s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>
Ph: +64 9 373 7599 ext 86487

From: mrtg-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch [mrtg-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch] on behalf of Engrie, Marc [marc.engrie at sanomamedia.be]
Sent: Wednesday, 29 February 2012 4:03 a.m.
To: mrtg at lists.oetiker.ch
Subject: [mrtg] more than in & out values


Is there a way (simple or complex) to get more than just 2 values (in & out) into a RRD file using MRTG?
If yes please advise on how to

Kind Regards

Marc Engrie
ICT Infrastructure Manager
Tel: +32 2 776 21 63
GSM: +32 476 52 35 45

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