[ovirt-users] Partition type

I am brand new to Ovirt looking to migrate some virtual machines now on a KVM server and wanted to get some advice. Setting up my first CentOS 7 server following this document to have a self-hosted engine and storage... http://community.redhat.com/blog/2014/10/up-and-running-with-ovirt-3-5/ I've never used GlusterFS either and my question is what benefits it provides, why this doc suggests using it and how it could provide redundancy. The server has 4 SSD drives and a RAID controller, but is that beneficial and would using LVM be any benefit to store the partitions/bricks? Thanks for any advice. -- Robert