[rrd-users] Using CDEF

Rob Ford r.ford at pindar.com
Wed Jan 23 17:07:28 MET 2002

I hope someone can help with the following problem:

I have created my .rrd file and wrote a simple perl script that collects the data, updates the database and then outputs the graphs.  After much fiddling I have managed to get them outputing the graphs how I want them......except I want to use the feature used in the tutorial that changes the colour of the graph when it gets above a certain amount.

Here is the command I'm using

rrdtool graph brisavWAITAdPrep.gif -s -6h --vertical-label "No. of Ads" -w 300 -t "No.of Adverts waiting to go into AdPrep" 
HRULE:100#FF0000:"Problem with System"

Any help you can give me would be much appreciated.


Rob Ford

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