busynode

busynode is a simple host reservation system, primarily designed for cluster installations. It allows users to communicate with others on what hosts they are currently using, or plan to use in the near future.

Reservation information is stored as text files on a shared filesystem (such as an NFS mount). When executed without any options, busynode behaves as an enhanced ruptime tool.

For more information, see http://unix.chem.indiana.edu/projects/busynode/