[rrd-users] Re: Multiple RRA and graph question
Alex van den Bogaerdt
alex at slot.hollandcasino.nl
Fri Jul 13 12:36:35 MEST 2001
Ruben Merz wrote:
> rrdtool create test.rrd \
> --start 920804400 \
> DS:speed:COUNTER:600:U:U \
> RRA:AVERAGE:0.5:1:24 \
> RRA:AVERAGE:0.5:6:10
One RRA is 24 rows, 1 PDP per CDP (with a default of 300 seconds per PDP).
The lenght is thus 24*300 seconds == 7200 seconds.
The other RRA is 10 rows, 6 PDPs per CDP, 60*300 seconds == 18000 seconds.
> rrdtool graph speed.gif \
> --start 920804400 --end 920808000 \
> DEF:myspeed=test.rrd:speed:AVERAGE \
> LINE2:myspeed#FF0000
> Which RRA is used??? Because both RRA are defined with AVERAGE. Could
> someone explain this to me?
This one is asking for 920808000-920804400 == 3600 seconds. Assuming
updates were not made after 920804400 + 300*24 = 920811600, the data
will be available in the 1st RRA.
HTH,
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