[rrd-users] Calculation that is a bit over my head.

Tobias Oetiker tobi at oetiker.ch
Mon Nov 18 00:23:37 CET 2013

Hi Jan

> On 18.11.2013, at 00:19, Jan Johansson <j2 at mupp.net> wrote:
> Hello!
> I have a data source that logs either 0 or 1.
> This data point relates to the state of a relay that controls a 3kW water heater
> I would like to be able to do dead reckoning of the power consumption of this heater for a given period of time.

I would suggest to set the DS to GAUGE

and then log 3000 when your heater is on and 0 when it is off


> But, I cannot figure out how to do this.
> Any hints?
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