[rrd-users] Can't graph anything from populated rrd

[Simon Hobson]

Victor Mercado <victor.mercado at ahold.com> wrote:

> rrdtool.create('%s' % rrd_input_file, '--start', 'now', '--step', '120',
>                        'DS:Jitter:GAUGE:5000:U:U',
>                        'DS:PacketLossPerc:GAUGE:5000:U:U',
>                        'RRA:AVERAGE:0.5:1:1440',
>                        'RRA:AVERAGE:0.5:1:3600',
>                        'RRA:AVERAGE:0.5:1:1440',
>                        'RRA:AVERAGE:0.5:1:3600')

You have 3 redundant RRAs there - 1440 is a subset of 3600, and they all consolidate the same way (ie nothing as it's one PDP (Primary Data point) per CDP (Consolidated Data Point).

> Unfortunately, I'm unable to graph the data.  I'm trying to create a simple graph without any optional parameters just to see something.  The syntax is a follows:
> 
> $ rrdtool graph -j <rrd filename> > graph.png
> 
> Unfortunately, I don't get any output.

You won't because that doesn't tell RRD to produce anything.
See :
http://oss.oetiker.ch/rrdtool/doc/rrdgraph_graph.en.html
http://www.vandenbogaerdt.nl/rrdtool/