[rrd-users] Re: Wrapping counter

Bas Rijniersce bas at brijn.nu
Wed Apr 23 19:04:40 MEST 2003


> From: Ingimar Robertsson [mailto:iar at skyrr.is] 

> If I remember correctly you can use DERIVE instead of 
> COUNTER.  You should tough check the manuals, I can't 
> remember it exactly.

>From the manual:

will store the derivative of the line going from the last to the current
value of the data source. This can be useful for gauges, for example, to
measure the rate of people entering or leaving a room. Internally,
derive works exactly like COUNTER but without overflow checks. So if
your counter does not reset at 32 or 64 bit you might want to use DERIVE
and combine it with a MIN value of 0. 

I read "derive works exactly like COUNTER but without overflow checks"
as something that is oposite to what I want.. Or did I misread then?
> Best regards.
> Ingimar


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