I live in a part of the world where broadband internet subscriptions come with a monthly data cap. The datacap is relatively large (750GB/month), but streaming 4k content will get you there! So I wanted to keep taps on my data usage. My router is the ideal place to …

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I've been experimenting a bit with Prometheus and Grafana. It allows you to make beautiful graphs from the metric data using relatively simple expressions. But one of the graphs that I had in mind, turned out to be more difficult. These are my notes.

I have a metric that counts …

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