[cies]

If I understand correctly you are suggesting a block storage solution. But that would then prohibit a scale out, right? (I'm reading on the ObjectiveFS site that it does allow the concurrent access of shares... Hmmm.)

The other solution is object storage, which is the real way forward (IMHO). This route make a app more adherent to the 12-factor principles.

[objectivefs]

Both GlusterFS and ObjectiveFS are shared filesystems instead of block storage, so they work with POSIX files/directories (like NFS) making them easier to scale out. If your application can work directly with an object store that is of course also a great way to go.