sixto.dsilva

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• Apr 18th, 2008

 

pipeline Parallelism occurs when the several connected progrm components on the same branch of graph executes simultanteously. if you are using a sort component the pipeline parallelism does not occur.

Dataparallelism : it occurs when program components execute simultaneously on different branches ofa graph. it can occur in two forms
a) mutiple separate datasets , one for ecach branch of the graph.
b) single dataset divided into partitions by or partition componenet. exmple partition by expression.

data parallelism occurs when a graph separates data into multiple divisions, allowing multiple copies of program components to operate on the data. no of partitions of a component defines the dept of parallelism.