NFS (was Re: Making rm undoable)

[Scott Schwartz]

In article <Mar.26.19.51.41.1989.8372 at geneva.rutgers.edu>, hedrick at geneva (Charles Hedrick) writes:

>You'll see that foo has been renamed to .nfsXXX.  Now if you kill the
>tail, .nfsXXX will go away.  I'm not sure quite how that interacts
>with statelessness.  It's possible that if you open a file, remove it,
>and then crash before closing it, that the .nfsXXX file will stay on
>the the file server.  I haven't looked at the code that carefully.

>From crontab:
 find / -name .nfs\* -mtime +7 -exec rm -f {} \; -o -fstype nfs -prune

>Despite all the comments about how NFS violates "Unix semantics",
>we've not run into anything that failed across NFS, aside from bugs in
>implementations.

That's because of hacks like the above :-)  NFS is stateless, except
for the state it maintains (on disk).
-- 
Scott Schwartz		<schwartz at shire.cs.psu.edu>