Re: 2.3 SMP overlapping writes and NFS

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 5 Aug 1999 15:52:02 +0100 (BST)


> Regardless of committing to stable storage, write atomicity can be used
> for database synchronisation between clients. Of course any sensible
> client would synchronise on a single byte... I don't know if any real
> applications depend on atomic writes.

NFS clients in NFSv2 do short term data caching so that doesnt work too
well either. The normal approaches for NFSv2 are link() and mkdir(). (open
O_EXCL doesnt work for some buggy old servers)

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