[rrd-users] tagging a chart's data?

[Lennart Koopmann]

Am Mittwoch, den 04.02.2009, 12:37 +0100 schrieb Bart Van Der Meerssche:
> We're now looking into ways to allow users to add annotations to the 
> charts. One display option involves tagging the data like they do in 
> google finance: http://finance.google.com/finance?client=ob&q=GOOG.
We 
> did find a way to add a vertical line at a certain timestamp through 
> VRULE. But is there a way to add a label to the VRULE like they did
in 
> this flex chart: 
> http://tomgutz.wordpress.com/2007/12/17/flex-custom-chart? Or does 
> someone know of a better solution for tagging a chart's data?

Hello Bart,

I don't think there is a way to do this with rrdtool. You can add an
entry in the legend for every VRULE if you want:

VRULE:time#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]...]][:dash-offset=offset]]

So long
Lennart Koopmann

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