[rrd-users] Re: Question about creating a RRA.

Christopher Bergeron christopher at bergeron.com
Sat Apr 23 04:51:44 MEST 2005

Ok, I seem to be making progress here.  I realized that my RRD wasn't 
created properly.  I modified my values, and now I seem to be getting 
valid data inserted into my RRD.

I haven't been able to successfully create a graph yet, but I'm 
confident that I'm on the right track now.

RRDTool is fantastic, but it definately has a learning curve to it.


Christopher Bergeron wrote:

>Guys, I apologize for this is a newbie question.  I've read the Tutorial
>and Beginners guides (and all the other documentation I can understand),
>however, I'm still a little unclear on some things.
>Here's some background on what I'm trying to do:
>Create a graph with a number between (0-700) on the Y axis; and time on
>the X axis (last 12 hours).  I will be inserting a number every hour (#
>website visitors) into the archive.
>Here's what I used to create the RRA:
>rrdtool create /tmp/website.rrd --start `date +%s` --step 60
>DS:website_users:GAUGE:600:0:671744 RRA:AVERAGE:0.5:12:24
>Here's how I add records/rows:
>/usr/local/rrdtool-1.0.49/bin/rrdtool update /tmp/website.rrd N:65
>However, when I fetch (or dump) the rows, I only get NaNs.
>Did I create my archive incorrectly?
>Thanks in advance for any help!
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