To get this demo working, you will need to serve this page from a local webserver and serve the folder that contains your RRD files.
This demo is designed to work with the RRD files generated by Collectd.
# Install and configure collectd (enable the rrd plugin)
$ aptitude install collectd
# Create a project folder
$ mkdir -p ~/Projects/jrrd
$ cd ~/Projects/jrrd
# Link to the collectd rrd folder
$ ln -f /var/lib/collectd/rrd/localhost data
# Start a local webserver
$ aptitude install twisted
$ twistd -n web --port 8080 --path .