The rebootProgram / scontrol reboot_nodes feature added in the 2.4-series to reboot nodes when they become idle, is really neat. We're considering using this to automatically reboot/reinstall nodes that have been up a long time.
Is there a way to list all pending reboots? Or find out whether a given node has a reboot pending? -- Cheers, Bjørn-Helge Mevik, dr. scient, Research Computing Services, University of Oslo