[rrd-users] Re: indicate collector down on graph

Ford, Andy andyford at AGEDWARDS.com
Thu Nov 2 18:30:23 MET 2006

> -----Original Message-----
> From: Leif Neland [mailto:leif at neland.dk] 
> Sent: Thursday, November 02, 2006 11:08 AM
> To: Ford, Andy; rrd-users at list.ee.ethz.ch
> Subject: [rrd-users] Re: indicate collector down on graph
> Ford, Andy wrote:
> > I'm collecting some ping-time type data with a timeout and I want to
> > differentiate on the graphs between collector failures and target
> > failures.
> > Right now, if I timeout or if my collector is down I get the same
> > thing: an empty graph.
> > I need to have say, a red block in the graph data area if the ping
> > target is down, or yellow if the collector is down.
> You must enter some value, like 0 or -1 when you get a timeout.
> When the collector is down, you already get a NaN.
> Then you must have the appropriate logic in rrdgraph to 
> handle those values.

But if I try to put a -1 or 0 in, won't it get normalized and get hard
to detect by rrdgraph?

> Is that enough clues, or should I provide an account for 
> consultant fee? :-)

Well, I would like to see a complete example if someone has one handy.

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