[REBOL] Re: Concurrent access to data file
From: kracik:mbox:dkm:cz at: 19-Feb-2001 17:43
CRS - Psy Sel/SPO, COUSSEMENT Christophe, CPN
> > Hi,
> > the problem was discussed here some time before.
> [sorry, I didn't got that]
> > You need some atomic
> > operation, which cannot be successfully done by two processes at the
> > same time. One such operation is in most OSes (including Windows NT)
> > local file rename. Any operation on network drives (NetBios or NFS) is
> > not atomic, so you cannot rely on it when synchronizing multiple PCs -
> > file locking suggested by Brett Handley is reliable only with a local
> > file, not a file on a network disk.
> [Now, I've learn something ! Thanks !]
Sorry for confusion, rename operation is atomic even on network
drives. Now I've learnt something from Ladislav ;-) I'm not sure about
file locking though.
> > I think that you should use TCP port on the server as suggested by
> > Brett Handley. There are also several distributed mutual exclusion
> > algorithms that don't require a central server, look at this paper for
> > more information:
> > http://www.cse.iitk.ac.in/~deepak/cs632/mutual-exclusion.ps
> [I'm not familiar with post-script files. Which soft do you use to
> read it ?]
> > HTH,
> > --
> > Michal Kracik
> Thanks for your answer,
> chr> ]
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