I am a bit confused, Does the guy want to have an ISPN cache store that store the data in a proper relational model? Or does he want Hibernate OGM to store in both ISPN and the relational database in parallel? I think he is talking about 1, which I admit I haven't thought about (ie reusing JPA's metadata to have the right relational model. It's an interesting idea to explore. On 29 sept. 2011, at 18:52, Sanne Grinovero wrote: > Hi, > there is this thread on the OGM forums, for which I think the last > post makes an interesting read: > > https://forum.hibernate.org/viewtopic.php?p=2449117#p2449117 > > people want the flexibility of the "grid", but still permanently store > the important stuff in their trusted relational database. > > I agree with the user in saying that this would certainly make OGM > even more interesting, something to consider in the design as a long > term plan. > In addition, it would provide a reliable way to perform relational queries :) > > Sanne