What kind of problem is MapReduce good for?

  • A: large matrix calculations
  • B: O(2n) algorithms
  • C: combining bits of data from many diverse sources
  • D: simple calculations over massive amounts of data
  • E: all of the above

    Answer: D

    MapReduce isn't good for everything. The key to using MapReduce for an application is to conceptualize the application as one or a sequence of simple operations, perhaps over massive data. Handling massive data with many computers is where MapReduce excels.

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