Having a PaaS with OpenShift which makes your app scaling automatically on demand has just one bottleneck: The database. It can't scale like the app could scale. Knowing that we need to find ways around that bottleneck. One way is to use JBoss DataGrid to cache requests to the database. In this lab we are developing an application which makes use of a database and add a layer of JDG nodes between the app and the database. Now we can scale up with requests on demand.