Right now I'm using a home-made sysmtem, which is a simple object store replicated across six nodes: https://github.com/skx/sos/ https://github.com/skx/sos/ I

Right now I'm using a home-made sysmtem, which is a simple object store replicated across six nodes: https://github.com/skx/sos/ https://github.com/skx/sos/ I think in production I've used NFS, DRBD, GlusterFS and OpenStack. Each has their pros and cons, and without a precise set of constraints it's hard to know what how to usefully answer any question of the form "Which would you recommend? Why would you choose this?" Distributed storage tends to be required either because you want redundancy, availability, or because your "stuff" is too large for a single box to host. But with a vague question it could mean "How do you backup boxes?" or something entirely different. (For example "distributed storage" could end up mapping to a pair of MySQL hosts, or a replicated PSQL database..)