[rrd-users] Undesired fractions

Tuc at T-B-O-H.NET ml at t-b-o-h.net
Tue Dec 18 16:22:55 CET 2007


> >	#!/bin/bash
> >
> >	rrdtool create foo.rrd --step 1 DS:foo:GAUGE:120:U:U RRA:LAST:0:1:60;
> >	rrdtool update foo.rrd N:0;
> >	sleep 1;
> >	rrdtool update foo.rrd N:1;
> >	# Show problem
> >	rrdtool dump foo.rrd | grep '\.[1-9]';
> >

		(some deleted)
>
> now=`date +%s`
> now=$(( ${now} / 60 * 60 ))
> # 60 is your step size, this gets the last date value which is an 
> exact multiple of your step
> # set your values here
> rrdtool update foo.rrd ${now}:....
> 
> I suggest you go to http://www.vandenbogaerdt.nl/rrdtool/ and read 
> the page that explains normalisation.
> 
	AH. Now, after reading the web page 1/2 a dozen times, AND
seeing this example, NOW the world makes sense. :)

	Ok, thank you. The only real last question that still isn't
making sense is the "LAST" CF. Is there more details of it
(IE: Example) somewhere?

		Thanks, Tuc



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