[rrd-users] Tutorial Question

Alex van den Bogaerdt alex at vandenbogaerdt.nl
Sat Jan 8 08:49:28 CET 2011

> -start 10 to -end 20
> I have to give you
> 20: x
> 30: y
> 20 holds data from 10 up to 20 excluding 20 itself
> 30 holds data from 20 up to 30 excluding 30 itself

Actually no, we have discussed this in the past. This should be somewhere
in the archives, years ago.

At time 20 you get a counter value, together with the counter value at 10
you have:
* start and end value
* start and end time
thus you can compute delta(value) and delta(time) to get the rate valid
between that start and end time.

The value you get at time 30 plays no role in this computation, not even
if it becomes unknown, does not arrive on time (heartbeat) and so on.

What information do you gather at time 30 which is valid at time 20? I
think none.

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