File::Monitor __works in shared filesystem environment__ in which changes can be made by many different compute nodes (or the head node). I tested File::Monitor by running the monitor on the head node and making changes using a different node.
This is in stark contrast to Inotify-based modules and even Perl 6's notifications of file system changes (doc.perl6.org/routine/IO%3A%3ANotific... which only work if changes are made by the same system on which the monitoring process is running.
Anyway, I'm so happy to find this module. Once I get to know it better, I will commit to a "star rating". I expect and hope it will be five stars.