【Spark篇】---SparkStreaming中算子中OutPutOperator类算子

一、前述

SparkStreaming中的算子分为两类，一类是Transformation类算子，一类是OutPutOperator类算子。

Transformation类算子updateStateByKey，reduceByKeyAndWindow，transform

OutPutOperator类算子print，foreachRDD，saveAsTextFile

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本文讲解OutPutOperator类算子。

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二、具体

1、foreachRDD

可以拿到DStream中的一个个的RDD，对拿到的RDD可以使用Transformation类算子对数据进行转换，foreachRDD方法内，拿到的RDD Transformation类算子外的代码是在Driver端执行

原文地址：https://www.cnblogs.com/LHWorldBlog/p/8521574.html