安装部署Hive on Spark
Hive默认使用MapReduce作为执行引擎，即Hive on mr。实际上，Hive还可以使用Tez和Spark作为其执行引擎，分别为Hive on Tez和Hive on Spark。由于MapReduce中间计算均需要写入磁盘，而Spark是放在内存中，所以总体来讲Spark比MapReduce快很多。
默认情况下，Hive on Spark 在YARN模式下支持Spark。本课程将为学员详细演示如何配置Hive On Spark安装过程。
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