[ovirt-users] The best HCI config with 8Nodes and 2 sites?

Hello everybody, I would like to deploy HCI with our 2 buildings each with 8 compute nodes. Each host has a mirrored OS disks and 1 slot for the SSD. So I will use SSD for the glusterfs. my question is what is the best type of the glusterfs volume? I can leave with 8way mirror but what happened if the connection between buildings will go down? where will my ovirt-engine start?