[rrd-users] adding DS values from multiple rrd files?

Joel jbrooks at oddelement.com
Tue Aug 3 15:48:58 CEST 2010

Thanks guys!

I think the part I'm struggling with is how to define the CDEF for the "total" variable inside a php foreach loop.  I get errors about the CDEF being reused.

Anyone out there doing rrdtool graphing with php?

-----Original Message-----
From: Simon Hobson <linux at thehobsons.co.uk>
Sender: rrd-users-bounces+jbrooks=oddelement.com at lists.oetiker.ch
Date: Tue, 3 Aug 2010 14:39:38 
To: <rrd-users at lists.oetiker.ch>
Subject: Re: [rrd-users] adding DS values from multiple rrd files?

Joel Brooks wrote:

>right now, the graph (a stacked graph) shows a different band for 
>each server and the legend displays the text "<server name>  <X> 
>messages in the queue".
>but how can i add up all the values so i can print "total <X> 
>messages in the queue"?

If a, b, c, d, ... are the totals for each server, then :

total=a,b,+,c,+,d,+, ...

Then print total

Simon Hobson

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