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[REBOL] Re: Concurrent access to data file

From: kracik:mbox:dkm:cz at: 19-Feb-2001 17:43

Hi, CRS - Psy Sel/SPO, COUSSEMENT Christophe, CPN wrote:
> > 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> ] > > -- > To unsubscribe from this list, please send an email to > [rebol-request--rebol--com] with "unsubscribe" in the > subject, without the quotes.
-- Michal Kracik