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ES-Hadoop是Elasticsearch推出的专门用于对接Hadoop生态的工具，可以让数据在Elasticsearch和Hadoop之间双向移动，无缝衔接Elasticsearch与Hadoop服务，充分使用Elasticsearch的快速搜索及Hadoop批处理能力，实现交互式数据处理。本...

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【Hadoop技术篇】hive的优化，经典面试

目录Map Join作用触发条件Bucket-Map Join作用触发条件SMB Join (sort merge bucket)作用触发条件Join-Skew关联查询时数据倾斜运行时优化编译时优化Unoin优化GroupBy-Skew统计时数据倾斜Map先行打散MR Job随机数打散M...

Hadoop Hive概念学习系列之hive里的优化和高级功能（十四）

在一些特定的业务场景下，使用hive默认的配置对数据进行分析，虽然默认的配置能够实现业务需求，但是分析效率可能会很低。 Hive有针对性地对不同的查询进行了优化。在Hive里可以通过修改配置的方式进行优化。　　以下，几种方式调优的属性。 1、列裁剪　　在通过Hive读取数据的时候，...

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