Play uses a shared nothing architecture. That means that you can run a number of app servers and any one of them can receive any request and deal with it. Basic

Play uses a shared nothing architecture. That means that you can run a number of app servers and any one of them can receive any request and deal with it. Basically there is no server-based session state. The web server it uses is asynchronous too. I've been running a fairly busy application for a couple of years with Play and have yet to encounter any of the standard JVM nightmares you get with Tomcat, e.g. Permgen space etc. It's awesome.