From Apples Website:
http://www.apple.com/acg/
Xgrid
Xgrid clustering software is intended primarily for scientific researchers who have a set of networked computers that are not yet being used to full collective CPU potential. The software provides a remote execution environment and file staging abilities that coordinate the running of tasks on distributed computing resources and ensure that each computer has access to all of the files necessary to execute the tasks, thus freeing both user and developer of such resources from this tedious work. Xgrid does not solve all clustering problems. It does not replace clustering software such as MPI or clustering hardware such as InfiniBand. Xgrid does not accelerate or "grid-enable" existing applications on your computer. For an application to take advantage of the Xgrid technology, you must update it to use the Xgrid APIs. However, if you currently run long computations in your Terminal windows using, say, an already-compiled executable, you should be able to use Xgrid out of the box to run batch jobs for this executable on your clusters. In this way Xgrid offers high-throughput computing with minimal development work on your part.
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From Apples Website: http://www.apple.com/acg/ Xgrid Xgrid clustering software is intended primarily for scientific researchers who have a set of networked computers that are not yet being used to full collective CPU potential. The software provides a remote execution environment and file staging abilities that coordinate the running of tasks on distributed computing resources and ensure that each computer has access to all of the files necessary to execute the tasks, thus freeing both user and developer of such resources from this tedious work. Xgrid does not solve all clustering problems. It does not replace clustering software such as MPI or clustering hardware such as InfiniBand. Xgrid does not accelerate or "grid-enable" existing applications on your computer. For an application to take advantage of the Xgrid technology, you must update it to use the Xgrid APIs. However, if you currently run long computations in your Terminal windows using, say, an already-compiled executable, you should be able to use Xgrid out of the box to run batch jobs for this executable on your clusters. In this way Xgrid offers high-throughput computing with minimal development work on your part.