Re: Need information on NFS


Rick Adams (rick@seismo.CSS.GOV)
Fri, 19 Dec 86 13:55:44 EST


        By the way, several notes have talked about NFS "violating Unix
        semantics". The most common example is that file locking doesn't work
        across the network. It does now, in Sun release 3.2.

This is only partially true. The system V lockf() IS supported by
a lock daemon. However it does NOT support the 4.2bsd flock() file locking.

Now since everything we do here is 4.2bsd compatible, not system 5, I
maintain that file locking still doesn't work. We bought a 4.2bsd compatible
system from Sun. We don't care what System 5 features they add.

It still doesn't do forced apppend writes, nor permit accessing
devices. That is something a good UNIX nfs would do. Those are clear
violations of Unix semantics and not fixed (nor planned to be fixed as
I understand it)

---rick



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