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The downside of that mechanism is control. If, as the OP says later, the need to suspend or terminate the processing early arises, then you're stuck with starting the whole process over from scratch. Same thing if the number of workers varies up or down.
With server/clients approach, pause and restart the clients, or knock out half the clients--or double them--and the processing continues without duplication and automatically redistributes to accommodate the changes.
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In reply to Re^3: randomising file order returned by File::Find