uri at stemsystems.com
Tue Dec 13 16:50:41 GMT 2005
>>>>> "SW" == Simon Wistow <simon at thegestalt.org> writes:
SW> We have a farm of machines which will have access to a file. We only
SW> want one of the machines accessing that file at once - if a process
SW> cannot get a lock on the file then it should exit immediately otherwise
SW> it shoudl write the necessary number of times to the file and then exit.
SW> Of course flock() doesn't work across NFS. Is the only solution to this
SW> a flock daemon?
mkdir works as an atomic (advisory) lock over nfs. the perl cookbook 1st
ed. has a recipe i studied and rewrote for my needs. the only issue is
possible left over locks after a reboot and those can be cleaned up with
a startup script.
Uri Guttman ------ uri at stemsystems.com -------- http://www.stemsystems.com
--Perl Consulting, Stem Development, Systems Architecture, Design and Coding-
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