Large enterprise applications that serve large number of users, without a doubt, have to be able to scale to keep up with the demand. There are various ways of accommodating scalability requirements. Let's discuss those here.
When working in a clustered environment, you need to be aware of how it could impact Hibernate. One thing that could be impacted by deploying in a clustered environment is identity generation. If you use an increment strategy for ID generation even in a thread-safe mode, you are still not guaranteed uniqueness. Even if you use UUID using java.util.UUID, the likelihood of collision is still there, though very minimal.
Another consideration is when dealing with detached entities. If you keep detached entities in your HTTP session, you have to ensure that either session affinity or sticky session is enabled, or session data is shared among the nodes in the cluster. This is typically done because one of the main reasons to use clustering is to support...