> hot-synching whole data centers That is actually what Facebook is doing with their spam detection code - their purely functional architecture makes it easier

> hot-synching whole data centers That is actually what Facebook is doing with their spam detection code - their purely functional architecture makes it easier and more reliable for them to hot-swap out parts of their codebase when the need to update it. https://code.facebook.com/posts/745068642270222/fighting-spam-with-haskell/ https://code.facebook.com/posts/745068642270222/fighting-spa...