When I first got into Graphite I was totally flashed by it. It seemed to be the holy grail in gathering all kinds of data about basically anything. Later when Grafana came along things got really nice looking too. Together these are incredibly powerful and gathering data was never easier, just send a data point with a name and timestamp and you're set. I use it for performance data of many systems as well as things like power usage, temperature, voltage, audio signal amplitude or RSSI of radio signals. Make sure to check them out if you've got some love for graphs and data.
As I've got an rTorrent instance (together with ruTorrent) why not push the data to Graphite too. I've written rTorrent-graphite (GitHub), a Python script which uses the XML-RPC API (_not_ SCGI, at least not yet) to extract some basic data such as:
- Used bandwidth up/down, including set limits
- Used memory, including set limits
- Number of torrents total, complete & incomplete
- Bytes remaining & done
- Number of peers, seeds, accounted
I'll probably add some other metrics later, and/or switch from XML-RPC to WSGI since that's a more direct way to speak with rTorrent. The image below shows how it can look like in Grafana. Graph ALL the things!