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InfoSphere DataStage Parallel Framework Standard Practices by Paul Christensen, Julius Lerm

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Understanding the parallel job score
DataStage parallel jobs are independent of the actual hardware and degree of parallelism used to run them. The parallel configuration file provides a mapping at runtime between the compiled job and the actual runtime infrastructure and resources by defining logical processing nodes.
At runtime, the DS parallel framework uses the given job design and configuration file to compose a job score that details the processes created, degree of parallelism and node (server) assignments, and interconnects (datasets) ...

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