[ovirt-users] Design question: one big NFS share or several smaller ones?

Hi all, I've got a design question: Are there any best practices regarding NFS datastores especially datastore sizing? Should I use one big NFS datastore and expand it on demand or should the size not exceed a certain limit and start with a new NFS datastore? Are there any other configuration considerations (NFS v3 or v4(.1) and mounting options)?