Reserved network ports

For a while it looked like POHMELFS was just the thing: a faster better
more reliable distributed NFS, with pretty much the same system
administration model ('oops, I want to make this FS networked, bang,
done'). But now Evgeniy has started to move POHMELFS to this elliptics
cloud-based thing, and as far as I can tell this requires you to *recreate
the filesystem* when you want to POHMELFSize it.

I don't *have* a cloud. I have one or two great big servers and I want to
distribute stuff between them and export their filesystems, possibly at
short notice, to a bunch of clients. And NFS is slow and inefficient and
non-POSIX and generally nasty.

Is there anything better? For a while it looked like POHMELFS would be,
but I no longer know. I've been hoping for something better for a couple
of decades now...