[rrd-users] CDEF Help

Rod Rod at Rods.id.au
Sat Jun 1 07:15:16 CEST 2013

On 06/01/13 14:27, Steve Shipway wrote:
> This is because, MaxRn and MinRn are VDEFs, and so have a single value and can be printed.  R24Hr, on the other hand, is a CDEF, and (like a DEF) is a time series.  Therefore, you also need to specify a CF (MIN, MAX, AVERAGE) so that it can reduce it to a single value.  The better way, though, is to make a VDEF and use that instead.
> Steve
> Steve Shipway
> University of Auckland ITS
> UNIX Systems Design Lead
> s.shipway at auckland.ac.nz
> Ph: +64 9 373 7599 ext 86487
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     Can you please help me with a solution, why is a single value a 
problem, the minimum is single, max is single, why the difference cannot 
be single too ?

     You can just reply to list, not directly :)

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