Nagios Support Forum

Hi there!
I'm a computer science student and I'm using nagios for a project exam for anomaly detection pourpose.
I have several host that I'm monitoring with nagios server and I want to get a report in csv or json of the real consumption of cpu, memory, disk, network etc, etc.
How can I do that please?

Set up your checks to have performance data (graphs) and then when the graphs are opened you'll find a contect menu that allows you to save the data in various formats.
The data is stored in .rrd files so if you want to use rrdtool, you can get to it that way as well.