This is one of those "what if" things.

You know how if your home directory is on a central server, if the
central server goes down, you can't log in _any_where because the NFS
server is not responding.

Well, if it were possible to do NFS mirroring and dynamic rebinding,
all that would happen is that the mount would glitch and bind to the
mirror instead.  Same thing if the server suddenly went down.

It would be a flip-flop relationship; if the master goes down, it comes
back as the slave.

That's a general idea -- what do you guys think?