[rrd-users] Re: RRA selection

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Fri Sep 7 16:47:29 MEST 2001

Dan Winslow wrote:

> Given a definition like :
> rrdtool create test.rrd -s 900
> DS:inutil:GAUGE:1800:0:200
> DS:oututil:GAUGE:1800:0:200
> RRA:AVERAGE:0.5:1:35040
> RRA:AVERAGE:0.5:96:365


> Which RRA is being plotted by the above statement? Both?

It depends.  What is the best match:

If the data you ask for is available in the first RRA (the one with
the smaller intervals) then this one will be used.

When you ask for more than one days worth of data, the request
cannot be satisfied by the first RRA.  The second RRA will be
used.  Any interval not (yet) available in that RRA will be read
as unknown.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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