COMP9313 week4a MapReduce

https://www.cse.unsw.edu.au/~cs9313/20T2/slides/L4.pdf

https://drive.google.com/drive/folders/13_vsxSIEU9TDg1TCjYEwOidh0x3dU6es

MapReduce

总结:

  1. MapReduce in Hadoop

  2. Shuffle in Hadoop

  3. Shuffle in Spark

    1)Hash Shuffle

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    2)Sofy Shuffle

  4. MapReduce Functions in Spark

    1) combineByKey

    2) reduceByKey

    3) groupByKey

  5.The Efficiency of MapReduce in Spark

    1)Number of transformations

    2)•Size of transformations

    3)Shuffles

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转载自www.cnblogs.com/ChevisZhang/p/13175842.html
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