Sunday, June 20, 2021

Simple Service Level Indicator implementation


Why are formulating service level objectives and their associated measurements (service level indicators) so difficult?  Xabier Larrakoetxea has released a framework  he calls "SLOth" that collapses the two (SLO & SLI) into a very-simple Prometheus based framework.    His examples are interesting and I shall eventually implement the home Internet SLI measurement as part of my own home Internet monitor (username: guest password: guest).

The measurement of customer satisfaction for home internet from the customer's perspective is that service is available during waking hours with very-few service interruptions.  Customers need the service to be low latency, and have low jitter.  Note that customers don't care about the bogus red herring measurement of  "bandwidth."  Video conferencing will work just fine on a consistent, low-latency 2 Mbit/sec service.  If you have lots of people in your home doing high-bandwidth or low-latency (interactive) work / play, you'll need more bandwidth, obviously.


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