A couple of years back, I sponsored a set of projects to look at how NFS could be used for databases. Some of the previous work that showed how NFS can be used for databases is covered here. One of the more research-oriented projects was one which we implemented an NFS client as a library linked to Oracle (this work was done by Glenn Colaco and Nisha Talagala). This allowed Oracle-specific optimizations for databases outside of the client OS that is resides on, and eliminates much of the OS-specific tuning required for optimal performance.
I’m enthused to see that Oracle have released and are now supporting a direct NFS client plugin.