开源大数据平台 E-MapReduce reduce先对key排序value-阿里云

编写MapReduce作业时，如何做到在Reduce阶段，先对key排序，再对value排序？

在编写MapReduce时，在Reduce阶段，如何做到先对key排序，再对value排序？

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更新时间 2023-05-11 14:35:18

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开源大数据平台 E-MapReduce

开源大数据平台 E-MapReduce（简称“EMR”）是云原生开源大数据平台，向客户提供简单易集成的Hadoop、Hive、Spark、Flink、Presto、ClickHouse、StarRocks、Delta、Hudi等开源大数据计算和存储引擎服务。

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EMR实时计算实践