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Users should edit their shell scripts to add special directives to the queue system, beginning with "#PBS", that request resources, declare a required walltime, and direct standard output and error.
Strategic Some notes and suggestions for users:
- Users should request the lowest possible walltime for their jobs, since the queue system will need to "block out" the entire 24-hour period when no walltime is specified. This is analogous to a customer arriving at a busy barbershop and explaining that he only needs a "very quick trim."
- Input and output to files do not seem to be as immediate as when running directly from the command line. Users should not count on immediate access to program output.
- Users should test system scaling before expanding beyond one node; for systems of 10 katoms, poor scaling has been observed beyond 8 ppn, while the 92 katom ApoA1 benchmark case scales well to 2 nodes.
Technical Approach used by Torque
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