Some people I know are looking at porting their (very large) J2EE application from using a homegrown OR framework on top of Entity Beans with CMP (without CMR) to Hibernate, and they asked me for some tips. I���m not claiming to be a Hibernate expert, but I���ve used it on an enterprise product, added features, submitted patches, etc. so I know a bit. Since I was writing this up anyway, I figured I���d blog it.