<<The performance of vboxsf is horrible - that's why there are so many recommendations to use NFS or CIFS for guests. So again I'm asking if there's any issue with accessing the .fdb via NFS - given the exclusive access I've described.
I don't see why there would be...other than ensuring that the access is indeed exclusive.>> Simply put. As long as the database on the NFS mount cannot be accessed by another Firebird server on another system then you can use this "feature" (RemoteFileOpenAbility). Regards Paul