Netflix runs on hundreds of interconnected microservices that, as a whole system, is too complex for any one person to completely understand. We are developing a tool, Vizceral, that helps distill the most useful bits of information and present it to the user in a way that they can 'feel' the state of the system without needing to understand all the moving parts. There is still a lot of work to be done to get more and more intuition about the system, but it has already proven vital internally and has been open sourced.
