[ovirt-users] Some questions

Hi, i installed Engine 3.0 and Node Ovirt 2.6, but it seems very unestable. Sometimes machines doesnt starts, nodes doesnt vinculate or UI doesnt work fine. I have only 2 nodes and storage its on the same physical machine than engine. -¿Does Node Ovirt 3.4 work with Engine 3.0? -¿Its necessary shutdown Nodes to do engine upgrade? -¿Are there any problem having the same physical machine for engine and storage? ¿what are advantages have on diferents machines? Thank you