I went into this expecting problems. Fedora 19 ships with GlusterFS 3.4.0 beta and I’m using GlusterFS 3.3 in production. I expected that I would have to downgrade my Fedora packages so I could use my volumes. I expected problems.
What I didn’t expect was that my wishes for the last three releases would be realized in 3.4. RPC compatibility!
I started futzing around with downgrading and encountering problems… Doesn’t really matter what those problems were because that was a complete waste of time.
I reinstalled the latest beta packages and mounted my volumes.
I was able to be a member of the peer group (my Fedora box is a member for CLI convenience only).
Everything just worked.