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
扫描二维码关注公众号,回复:
11340888 查看本文章
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