Version 1.0

• Task migration : When a node makes itself unavailable to run jobs, tasks running on it are checkpointed and migrated to other nodes. Checkpointing support is provided by the Condor package developed at the University of Wisconsin. For sun4 platforms, portions of Condor needed by PRM are available separately as the checkpointing-extensions distribution.

• Application debugging : By specifying debugging options, applications tasks can be started under a debugger. A front end transmits debugging commands to back end task-monitors that control program execution. Patches are provided that adapt the Gnu source level Debugger (gdb) to function as the task-monitor. For parallel programs, each target task is controlled by a separate task-monitor. Tracing and replay options enable the exact recreation of the sequence of events in a program's history.

• PVM 3.3.5 compatibility : Interprocess communication interface compatible with that of PVM Version 3.3.5 (including dynamic process groups).

• Customization of the terminal I/O task is no longer possible. All application specific initialization must now be handled by a user task that calls call the I/O routines from the PRM library.