[ovirt-users] oVirt maintence "best practices"

hello: Now that I've had my ovirt cluster running for about a month and a half, I am realizing I don't necessarily know the best practices for keeping it up. I've been seeing the notices in the ovirt hosts screen showing that there are updates waiting for the hosts, and I'll put them in maintence mode one at a time and apply the updates. What about the engine itself? Is it recommended/safe to log into the engine and just run "yum update"? Is there other procedures I should be doing? My oVirt cluster is a 3 node cluster with gluster, running on each node. Thanks! --Jim