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The right level of parallelism for maps seems to be around _________ maps per-node.

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The right level of parallelism for maps seems to be around _________ maps per-node.

(a) 1-10

(b) 10-100

(c) 100-150

(d) 150-200

This question was posed to me in homework.

My question comes from Mapreduce Development topic in chapter Developing a MapReduce Application of Hadoop

1 Answer

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Best answer
Right answer is (b) 10-100

The best explanation: Task setup takes a while, so it is best if the maps take at least a minute to execute.

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