spark算子---reduceByKeyAndWindow操作

宝哥大数据发布时间：2018-05-14 13:42:34 ，浏览量：0

reduceByKeyAndWindow

这里写图片描述

积累窗口大小的数据，进行计算，对该窗口内的数据进行reduceByKey操作

1、多长时间切割一次rdd 有spark决定

val ssc = new StreamingContext(conf, Seconds(5))   //设置多行时间切割一个rdd

2、窗口大小，以及滑动频率

这里写图片描述

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spark算子---reduceByKeyAndWindow操作

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