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MapReduce 101: Parallel ProgrammingMike Peters, 12-21-2009 |
Two of the best video tutorials explaining the basics of MapReduce.
If you're used to MySQL, you can think of "Map" as several queries running "SELECT" where data is extracted from multiple tables. And you can think of "Reduce" as the "GROUP BY" operator where data is joined together to form a short result.
For more information about MapReduce, see Google's Introduction to Parallel Programming and MapReduce
If you're used to MySQL, you can think of "Map" as several queries running "SELECT" where data is extracted from multiple tables. And you can think of "Reduce" as the "GROUP BY" operator where data is joined together to form a short result.
For more information about MapReduce, see Google's Introduction to Parallel Programming and MapReduce
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