>"Commodity software defined storage" (IBM selling XIV on generic hardware, Ceph, and so on) seems far more likely. Ceph and the other distributed things are p

>"Commodity software defined storage" (IBM selling XIV on generic hardware, Ceph, and so on) seems far more likely. Ceph and the other distributed things are pretty great if what you need is block devices. RADIOS, by all accounts, is pretty good. CephFS, on the other hand... not so much. It's hard to make a distributed coherent shared filesystem. If you need a filesystem that can be mounted by multiple clients, NFS is still dang hard to beat. NFS 4.1 with pNFS looks like it might take away a lot of the advantages a dual-head NetApp server has over a single zfs server. But NFS itself? NFS has never been a real force in "production" - and that will continue. Here in corp-land, though? and in some lab uses? where we really need a shared filesystem? NFS is not going anywhere.