How Facebook uses Erlang for real-time chat

That was a fantastic read. This is indeed old news in terms of technology choices, but it was great to hear how they rolled the product out.<p>I almost didn't read this article due to the "isn't this a bit old" comments here, but, am very glad I did.

I haven't used Erlang but I wonder if people will start blaming Erlang as "not stable" since Facebook chat is so unstable... the same way people said Ruby on Rails couldn't scale because Twitter was haven't problems scaling.

Isn't this a bit old and why does it go to posterous when it's taken from facebook.com?

Er... why didn't they just use XMPP? I haven't used facebook chat much, but the times that I have used it, it has proven to be a lot more unreliable compared to gTalk.

FWIW, Their Facebook chat seems to be constantly wrong. Unless it's just my account. "50 users online", then you click on it, and it changes its mind and says 7 users.

blogspam, actual URL is <a href="http://www.facebook.com/note.php?note_id=14218138919" rel="nofollow">http://www.facebook.com/note.php?note_id=14218138919</a>