[rrd-users] RRA:AVERAGE - How does RRDtool know which RRA to use?

[Otavio Augusto]

There will stored all archives from each RRA in from two DS. When you fetch
the data, you chose which RRA to be consulted.
=]


2010/8/18 tinsfci <perlon at passagen.se>

>
> Hello,
>
> I can´t fin out how RRDtool "knows" which RRA to get data from if you for
> example has a setup  of 4 RRA:AVERAGE:s, se below, (from the RRDtool
> tutorial):
>
> Let´s say I plot a graph from "now" to -1month, does RRDtool
> "automatically"
> use "no 3", or do i specify it somewhere?
>
> "no 1": 600 samples of 5 minutes  (2 days and 2 hours)
> "no 2": 700 samples of 30 minutes (2 days and 2 hours, plus 12.5 days)
> "no 3": 775 samples of 2 hours    (above + 50 days)
> "no 4": 797 samples of 1 day      (above + 732 days, rounded up to 797)
>
>   rrdtool create myrouter.rrd         \
>            DS:input:COUNTER:600:U:U   \
>            DS:output:COUNTER:600:U:U  \
>            RRA:AVERAGE:0.5:1:600      \
>            RRA:AVERAGE:0.5:6:700      \
>            RRA:AVERAGE:0.5:24:775     \
>            RRA:AVERAGE:0.5:288:797    \
>            RRA:MAX:0.5:1:600          \
>            RRA:MAX:0.5:6:700          \
>            RRA:MAX:0.5:24:775         \
>            RRA:MAX:0.5:288:797
> --
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> Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com.
>
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-- 
Otavio Augusto.
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