[rrd-users] Re: GRAPH using Several sources

[Alex van den Bogaerdt]

Smith, Brent wrote:

> I am trying to sum data from several (100+) different sources an display
> them on a graph.

[...]

> All I get when I run this is a blank graph. If I just graph the small sums
> (bitsout0..bitsout8) I get several lines, but they are incomplete. They only
> show several incontiguous line fragments (a fews hours worth here, a few
> there...)

[...]

> Each of these RRD's do have valid data and I can generate graphs for each of
> them individually. 
> 
> If anyone has any ideas, please let me know. 

I think that you assume each of these RRDs have not a single unknown
in them.  I think that this assumption is wrong.

Adding anything to unknown results in unknown.  999 known numbers
and one unknown will result in unknown (the gaps you see).

The tutorial describes this (somewhere near the end).

HTH
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