Tabla de Contenidos: “…MapReduceChimpanzee and Elephant Save Christmas; Trouble in Toyland; Chimpanzees Process Letters into Labeled Toy Forms; Pygmy Elephants Carry Each Toy Form to the Appropriate Workbench; Example: Reindeer Games; UFO Data; Group the UFO Sightings by Reporting Delay; Mapper; Reducer; Plot the Data; Reindeer Conclusion; Hadoop Versus Traditional Databases; The MapReduce Haiku; Map Phase, in Light Detail; Group-Sort Phase, in Light Detail; Reduce Phase, in Light Detail; Wrapping Up; Chapter 3. …”