[rrd-users] Re: background change

Alex van den Bogaerdt alex at ergens.op.het.net
Wed Sep 21 23:16:57 MEST 2005

On Wed, Sep 21, 2005 at 05:05:31PM -0400, Gregory (Grisha) Trubetskoy wrote:

> On this graph:
> http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/gallery/panel_user.png
> periods of downtime are marked by background shifting to pink. How is this 
> done? Any tips/pointers/links would be highly appreciated!

If some variable is unknown, then plot to infinite, else don't plot.

Convert to CDEF and draw:


(do this first, overlay the rest)

It also seems to plot the datasource using TICK (that small coloured
bar on the bottom) and of course all datasources are plot as well.


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