[enigmo]

I heard a rumor a while back that Facebook Chat was rewritten in C++... but I can't seem to find anything to verify that. Do you know if it's still Erlang?

[zeckalpha]

When it was "erlang" I think they were just running ejabberd.

[asdasf]

Ejabberd is not an epoll-driven web server, which is what the quotes from facebook people said they wrote in erlang.

[asdasf]

It was always both as far as I know.

"For Facebook Chat, we rolled our own subsystem for logging chat messages (in C++) as well as an epoll-driven web server (in Erlang)"

[enigmo]

The rumor was that it had been rewritten in 100% C++...

[asdasf]

No idea. Sounds like the kind of thing that gets started based on a misunderstanding like someone saying "we wrote that in C++" in reference to part of the chat system. Either way, my point was that facebook isn't a PHP shop. Erlang/C++ or just plain C++, neither is PHP.