[rrd-users] Re: rrdupdate not working properly?

Alex van den Bogaerdt alex at ergens.op.het.net
Wed Sep 6 16:43:47 MEST 2006

On Wed, Sep 06, 2006 at 04:15:13PM +0200, Stefan Moser wrote:

> ABSOLUTE, like DERIVED and COUNTER, are used for things that DO have a
> relation to time.

and so is GAUGE.

Using GAUGE to display other stuff not related to time is a hack.  A
very useful one, but still a hack.

Internally rrdtool works with normalized rates.

ABSOLUTE, DERIVED, COUNTER and GAUGE determine how the input is
transformed into a not-yet-normalized rate.  GAUGE simply means
the input already _is_ a rate.

People that don't understand this important feature have trouble
understanding why rrdtool is displaying "2.5" for the amount of
people entering a room.  This is because it is not 2.5 people,
it is 2.5 people per time interval.

Alex van den Bogaerdt

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