[rrd-users] Aggregate/combine several RRDs

[Alex van den Bogaerdt]

On Fri, Jun 20, 2008 at 10:37:31PM +0200, Raimund Berger wrote:
> "Raimund Berger" <raimund.berger at gmail.com> writes:
> 
> >> Creating another RRDfile isn't hard to do.  Filling it with numbers
> >> isn't hard either.  The biggest challenge is to get your minimum and
> >> maximum rates correct.
> >
> > And agreed, fetch and update via a script should not be too hard to
> > accomplish.
> 
> Correction, not agreed. I forgot what I initially had in mind as being
> the main obstacle to storage of computed intermediates, i.e. fetch
> provoding no cdef.
> 
> While you can perform various computations on your input with graph
> via cdef, I don't see a similar facility coming with fetch and/or
> companions. So apparently, there's no way to stash those computed
> results away in an RRD.

Have you looked at rrdtool xport ?

-- 
Alex van den Bogaerdt
http://www.vandenbogaerdt.nl/rrdtool/