# [rrd-users] Understanding Questions

Markus.Forrer at coop.ch Markus.Forrer at coop.ch
Mon Nov 26 10:01:04 MET 2001

```Morning :)

Only to be sure that I am right or totaly wrong with my understanding of
RRD:

The following example:

I want to monitor a 1 Gigabit Link. For this I set the intervall to 30s.

I create the following rrd on friday.

./rrdtool create ../test/bdfalk_8004.rrd --step 30
DS:input:COUNTER:600:U:U
DS:output:COUNTER:600:U:U
RRA:AVERAGE:0.5:1:6000
RRA:AVERAGE:0.5:60:700
RRA:AVERAGE:0.5:240:775
RRA:AVERAGE:0.5:720:797
RRA:MAX:0.5:1:6000
RRA:MAX:0.5:60:700
RRA:MAX:0.5:240:775
RRA:MAX:0.5:720:797

I think thats wrong!!

I wanna make the following graphs linke MRTG:

last day with AVERAGE and MAX of 30s Interval
last week with AVERAGE and MAX of 30min Interval
last month with AVERAGE and MAX of 2h Interval
last year with AVERAGE and MAX of 1d Interval

I suggest that I have to correct the rrd to the following for example for
AVERAGE

./rrdtool create ../test/bdfalk_8004.rrd --step 30
DS:input:COUNTER:600:U:U
DS:output:COUNTER:600:U:U
RRA:AVERAGE:0.5:1:6000        #1 Sample every 30 sek for 2d and 2h
RRA:AVERAGE:0.5:60:700        #60 Samples for the 30min Interval for
12,5d
RRA:AVERAGE:0.5:240:775      #240 Samples for the 2h Interval for
50d
RRA:AVERAGE:0.5:2880:797    #2880 Samples for the 1d Interval for
732days

Am I right??

How can I correct the last rra?? RTFM??

I wish all of you a good week.

Regards

COOP
Markus Forrer
Betrieb Netzwerk
Tel. +41 61 336 75 37
Fax +41 61 319 17 67
mailto:markus.forrer at coop.ch

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