On Mon, 11 Nov 2002, Nisim, Amit wrote:

> Hi All,
> 
> 
> flock doesn't work when I am running flock to file x from different machines.
> 
> What I mean:
> I am running flock from machine XXX on file z
> If I try to write to file z  from machine YYY I succeed.
> 
> 
> Do you know mechanism like flock that work on several machines ?

flock provides you with advisory locking, what does this mean?
All processes trying to access this file must check for the existence
of a lock. You can flock a file (advisory lock) and still read or write 
from another process in the same machine. 

You might be interested in mandatory locking, but I am not sure if
you can obtain mandatory locking on a NFS mounted filesystem. You might
want to google on this topic before even attempting it. You have been
warned :-)


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