[openstack-hpc] Ceph + Nova

Hi everyone: I'd like to know your opinion as nova experts: Would you recommend CephFS as shared storage in /var/lib/nova/instances? Another option it would be use GlusterFS or MooseFS for /var/lib/nova/instances directory and Ceph RBD for Glance and Nova volumes, don't you think? Thanks for your attention. Best regards, JuanFra