flink之keyby groupby区别

之前学习spark 的时候对rdd和ds经常用的groupby操作,在flink中居然变少了 取而代之的是keyby 顾名思义,keyby是根据key的hashcode对分区数取模   For instance, if we know that the load of the parallel partitions of a DataStream is skewed, we might want
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