> Servers built with Node.js are typically super fast and can handle thousands, tens of thousands, even hundreds of thousands of concurrent connections — something very difficult to achieve with threaded servers. How can that be?

I've read similar sentiments in a bunch of places but whenever I push any real traffic at the nodejs version of our API server it falls over pretty quickly (even with ulimit increases). What exactly are people doing to handle tens or hundreds of thousands of connections?

Incidentally, if any nodejs gurus are interested we're looking for a remote freelancer to audit our nodejs stuff and help us with a deployment strategy (assuming we can get to the 100s of thousands of connections mark).