[rrd-users] Re: My firs rrd - please help :)

[Moyaze Shivji]

I had this problem in the week.

I was told to use

--lower-limit 1 --upper-limit 500 for the y-axis.


To measure over a 25 hour period I would sugesst taking 288 samples....I
think that works out as 1 sample every 300 seconds (i.e.5 minutes).

something along the lines off :

/usr/bin/rrdtool create file.rrd --start 'epoch time'
BDS:numbers:GAUGE:600:U:U RRA:A
VERAGE:0.5:1:288


Hope this helps.

M
(aka RRD Newbie)




On Thu, 26 Feb 2004, jdavis wrote:

> Hello,
>  I am trying to setup a simple rrd and then graph the data. My data
> set is simple.. every 5 minutes my rrd is updated with a number between
> 1 - 500. I would like the graph to have values ranging from 1 - 500 on
> the vertical axis. And the have a 24 hour period represented by the
> horizontal axis. I am still pretty confused as how to do this. Here is
> what Im trying....
>
> rrdtool create test.rrd   \
> --start 1077819500        \
> DS:speed:ABSOLUTE:300:U:U \
> RRA:AVERAGE:0.5:1:24
>
> I think this is only for  2 hours, i will adjust to 24 hours when i
> think i understand ...
>
> then heres what updates the rrd...
>
> #! /usr/bin/perl -w
> $amount = 1;
> @array = 1 .. 500;
>
> while($amount){
> 	sleep(300);
> 	$index   = rand @array;
>  	$element = $array[$index];
> 	$date = `/bin/date +%s`;
> 	chomp($date);
> 	print "Date = $date - Element = $element\n";
> 	`rrdtool update test.rrd  $date:$element`;
> }
>
> the output i get from this is not what i expected to see..
> on the vertical axis i get 1.0 to 1.4 not 1 to the highest value
> inserted.
>
> Could someone please help me understand. I just want a graph that tells
> me what the number was that was entered into the rrd every 5 minutes.
>
> Lost,
> --
> jdavis <jd at taproot.bz>
>
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