[rrd-users] VDEFs and handling NaNs....

[David Ball]

  Thanks for your prompt replies, guys.  I'm only recently having to
dive in relatively deep into RRDTool for work-related purposes, and
I've had great success  in getting help from the folks on the list.
good stuff.
   For my purposes, replacing the NaNs with zeroes should help me
achieve what I'm looking for.  Thanks again.

David

On 4/27/07, Tobias Oetiker <tobi at oetiker.ch> wrote:
> Hi David,
>
> NaNs are taken as non existant values ... this means that they will
> be ignored totall ...
>
> so if half the day is NaN ... then the average for the day will be
> over 12h only ...
>
> hope this helps
> tobi
>
> Today David Ball wrote:
>
> >   I'm trying to (re)interpret the docs for VDEFs, but wouldn't mind a
> > little clarification if possible.  If my rrd has a ton of NaNs in it,
> > and I have a DS defining, say, bits/sec, and then I use a VDEF to
> > determine AVERAGE or PERCENT, are the NaNs assumed to be 0s?  Are they
> > included in the calculations at all ?  Or are only the 'real' values
> > in the .rrd included when calculating PERCENT, AVERAGE, etc ?
> >   Thanks in advance.
> >
> > David
> >
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> >
> >
>
> --
> Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
> http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902
>