Peter Seebach writes:
> Has anyone implemented a filesystem with copy-on-write semantics?
> I'd like to be able to, for instance, have a file which will be a
> link to another file, until it gets written to, at which point, it
> becomes a new file, containing whatever new data.  Is this
> monumentally stupid for a reason which will become apparent before
> this message makes it back to me, and/or is it implemented already?

Actually, things like this have been done on several occassions -- I
think AFS has some variant on it, as does the file system used for the
Network Appliances NFS box...

.pm