Re: [mh] how to prepare RRD to make valuable data for unconventional type of sensors (motion, door-window sensors, etc...)

[Ralph M. <ral...@gm...>]

In my experience, RRD has always put time across the X-axis and the
measured value on the Y-axis.  I don't remember where I read it -
maybe in the docs - but if you tell RRD that samples will be stored
every 5 minutes, it will interpolate samples that are slightly out of
the time bracket.  That is, if a sample is a few seconds late or
early, the value will be adjusted up or down a fraction to follow the
curve.

At least, that's how I understood it - there may be a way to stop that
happening, but I've never needed to find out... :)

Ralph Mitchell


On 3/28/06, David Norwood <dno...@ya...> wrote:
> I have only worked with rrd a little, but it seems like it wants to graph
> things that you measure at regular intervals.  Maybe you will have an eas=
ier
> time if you store how many times the motion sensor triggered in each 5
> minute period.
>
> David
>
> ----- Original Message -----
> From: "Robert Rozman" <ro...@fr...>
> To: <mis...@li...>
> Sent: Thursday, March 16, 2006 12:07 AM
> Subject: [mh] how to prepare RRD to make valuable data for unconventional
> type of sensors (motion, door-window sensors, etc...)
>
>
> > Hi,
> >
> > I still find RRD a bit hard to setup.
> >
> > How would one prepare congifure base to contain informations about when
> > was motion detector triggered?
> >
> > I'd like to capture all events in house for later simulations for resea=
rch
> > purposes...
> >
> > Any more info on that matter ?
> >
> > Thanks in advance,
> >
> > regards,
> >
> > Rob.
> >
> >
> >
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