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Message: [QUOTE="ara.t.howard, post: 4500051"] ruby queue and dirwatch both do this. [URL]http://codeforpeople.com/lib/ruby/dirwatch/[/URL] [URL]http://codeforpeople.com/lib/ruby/rq/[/URL] atomic creation of files is trickier than one might imagine. is this on *nix? is so checkout my lockfile class and posixlock. it's very important to note that there is ONE atomic creation operator on *nix and it is NOT open or mkdir - symlink is the one. 'man lockfile' might be illuminating. cheers. -a -- =============================================================================== | ara [dot] t [dot] howard [at] noaa [dot] gov | all happiness comes from the desire for others to be happy. all misery | comes from the desire for oneself to be happy. | -- bodhicaryavatara =============================================================================== [/QUOTE]