https://github.com/Netflix/maestro
https://netflixtechblog.com/orchestrating-data-ml-workflows-at-scale-with-netflix-maestro-aaa2b41b800c
https://netflixtechblog.com/maestro-netflixs-workflow-orchestrator-ee13a06f9c78
https://news.ycombinator.com/item?id=41037745