Erlang is great - we ended up settling on it as the basis of our platform. It was between Erlang and C++ for our real time highly available system and in hindsight Erlang was a no brainier. So far it hasn’t disappointed.
You won’t be disappointed. I have an Erlang/OTP system in operations since nearly 10 years. Exactly zero downtime since first day of operation. And we did upgrades and change of hardware. The customer is in love.
It is an automatic train supervision system for a metro line. It tracks and displays the position of trains and automatically routes them depending on schedule, delays and incidents. It also offer control and commands of the traction power and the devices in station such as elevators, gates, doors, passenger information display, etc. It also logs all commands and events on the system. It’s the « command center « of a railway if you prefer. So it must never stops.
