If you haven't seen it yet, there is a landing page with links to lots of information on Red Hat Storage. The page is available here:
If you are new to Red Hat Storage, select the Knowledge & Helpful Resources tab from that page. From that tab, you can view two videos for an introduction to Red Hat Storage (previously name GlusterFS).
After that, you can view user manuals and reference architectures to learn more about Red Hat Storage features and setup procedures.