Hive数据压缩-阿里云

Hive数据压缩和存储格式

一、了解Hive的数据压缩hive 的数据压缩 == MR的数据压缩1.在哪个阶段进行数据压缩MR阶段过程： input -> map -> shuffle -> reduce -> output shuffle 阶段几个重要内容：分区 -> 排序 -> comb...

Hadoop Hive概念学习系列之hive的数据压缩（七）

Hive文件存储格式包括以下几类： 1、TEXTFILE 2、SEQUENCEFILE 3、RCFILE 4、ORCFILE 其中TEXTFILE为默认格式，建表时不指定默认为这个格式，导入数据时会直接把数据文件拷贝到hdfs上不进行处理。 SEQUENCEFILE，RCFILE，ORCFILE格式...

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Hive数据压缩笔记

Hive数据压缩本文介绍Hadoop系统中Hive数据压缩方案的比较结果及具体压缩方法。一、压缩方案比较关于Hadoop HDFS文件的压缩格式选择，我们通过多个真实的Track数据做测试，得出结论如下： 1. 系统的默认压缩编码方式 DefaultCodec 无论在压缩性能上还是...

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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