[ovirt-users] Clusters run virtual machines or Red Hat Gluster Storage Servers

Hi, everybody. When I was looking at the administrator's manual, it prompted Clusters run virtual machines or Red Hat Gluster Storage Servers. These two purposes are mad exclusive: Virtualization and storage hosts together. When I configured the cluster, I said that the glusterfs and virt I saw were alternatives to the two checkboxes. I would like to ask what happens when glusterfs and virt are in the same cluster? How can I use hosted engine when I have four nodes? Thank you very much for your reply.