[rrd-users] Re: newbie RRA question: why multiple RRA within one file

Jason Fesler jfesler at gigo.com
Wed Dec 12 18:36:29 MET 2001

> I've read the rrd tutorial and man pages several times. Really! But I
> don't under stand the examples where multiple RRA with the type
> "AVERAGE" are created within one RRD-File with one DS.
> Can anybody tell me what's that for? It seems like I can't fetch or
> graph those additional RRA because they have no distinguished name,
> don't they?

If you want to store a higher quality sample for a reasonably short period
of time, and _also_ store a lower quality _long_ period of time, it comes
in handy.  As to pulling data from it, rrd's "fetch" and "graph" commands
pull from whatever is most appropriate for the date range you give it.

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