Using RRDtool to graph custom data

[Red Squirrel]

I can't seem to find any good tutorials on this, they all skip the important details, such as:

What format does my data have to be in? If I can use custom formats, how do I tell RRDtool how to parse it? Or perhaps I'm not even looking at the right tool... what I want to do is grab a set of data and make a graph with it. Is that the right tool for that? Currently my data is as follows:

1361003209;1369
1361003214;1363
1361003219;1363
1361003224;1357
1361003229;1363
1361003235;1363
1361003240;1363
1361003245;1369
1361003250;1363
1361003255;1363

But it's a custom app, so I can change it. Am I better off having 3 separate data sets? Ex: monthly, daily, hourly? Or can I just have one dataset that goes 30 days back?
I want to graph that in say, an hour, or maybe 24 hours, etc.

 

[SpaceHonkey]

Have you looked here?

http://oss.oetiker.ch/rrdtool/doc/rrdupdate.en.html