Erlang’s 99.9999999% (nine nines) reliability
The reliability figure wasn’t supposed to measure the total time any part of AXD301 (project in question) was ever shut down for over 20 years. It represents the total time over those 20 years that the service provided by the AXD301 system was ever offline. Subtle difference. As Joe Armstrong says here: The AXD301 has … Read more