The scalability is not always perfect, however, it's very good. For example, maybe sometimes we only have two instances as we don't know how to balance three instances. We have to know how it's working the load balancer of a session data when we lose one instance or one server, for example. Maybe we need to learn more about that. I'd like some better documentation to find information about how it's working the load balancer in the high availability. We know that the load balancer is using the name of each instance and, for example, if we are using numbers on the line of each server, we know that from server one that the configuration is supposed to be to server two, and from the server two to server three, or something like that. With JBoss right now we don't know. Maybe this is due to the fact that we only have two servers. With these two servers, it's enough for working and giving very good services. While we don't need to know that right now, maybe in the future we have to learn more or will have to search the documentation about how we have to configure our web server balancer or implement that load balancer with Jboss.