[Python-Dev] Does Python need a file locking module (slightly higher level)?

[Jean-Paul Calderone]

On Tue, 23 Oct 2007 01:11:39 +0100, Jon Ribbens <jon+python-dev at unequivocal.co.uk> wrote:
>On Tue, Oct 23, 2007 at 12:29:35PM +1300, Greg Ewing wrote:
>> skip at pobox.com wrote:
>> > Does fcntl.flock work over NFS and SMB and on Windows?
>>
>> I don't think file locking will ever work over NFS, since
>> it's a stateless protocol by design, and locking would
>> require maintaining state on the server.
>
>You can do file locking over NFS, that's one of the reasons people
>use fcntl. It uses an RPC side channel separate to the main NFS
>protocol.

You can do it.  It just doesn't work.  (You could say the same about
regular read and write operations for many NFS implementations, though)

Jean-Paul