Hive集成tez引擎

在使用Hive 2的时候，启动时会提示：Hive-on-MR is deprecated in Hive 2 and may not be available in the future versions. Consider using a different execution engine (i.e. spark, tez) or using Hive 1.X releases.

tez引擎可以将多个有依赖的作业转换为一个作业，这样只需写一次HDFS，且中间节点较少，从而大大提升作业的计算性能。

#下载tez依赖包
https://archive.apache.org/dist/tez/0.9.1/

#解压
tar -zxvf /opt/software/apache-tez-0.9.1-bin.tar.gz -C /opt/module
mv /opt/module/apache-tez-0.9.1-bin /opt/module/tez-0.9.1

#上传至hdfs，配置文件中会用到
hadoop fs -mkdir /tez
hadoop fs -put /opt/software/apache-tez-0.9.1-bin.tar.gz/ /tez

#进入hive配置文件目录
cd /opt/module/hive/conf

#配置tez-site.xml
vim tez-site.xml
	<?xml version="1.0" encoding="UTF-8"?>
	<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
	<configuration>
    	<property>
        	<name>tez.lib.uris</name>
        	<value>${fs.defaultFS}/tez/apache-tez-0.9.1-bin.tar.gz</value>
    	</property>
    	<property>
         	<name>tez.use.cluster.hadoop-libs</name>
         	<value>true</value>
    	</property>
    	<property>
         	<name>tez.history.logging.service.class</name>        
         	<value>org.apache.tez.dag.history.logging.ats.ATSHistoryLoggingService</value>
    	</property>
	</configuration>

#配置hive-env.sh
mv hive-env.sh.template hive-env.sh
vim hive-env.sh
	# Set HADOOP_HOME to point to a specific hadoop install directory
	export HADOOP_HOME=/opt/module/hadoop-2.7.7
	# Hive Configuration Directory can be controlled by:
	export HIVE_CONF_DIR=/opt/module/hive/conf
	# Folder containing extra libraries required for hive compilation/execution can be controlled by:
	export TEZ_HOME=/opt/module/tez-0.9.1    #tez解压目录
	export TEZ_JARS=""
	for jar in `ls $TEZ_HOME |grep jar`; do
    	export TEZ_JARS=$TEZ_JARS:$TEZ_HOME/$jar
	done
	for jar in `ls $TEZ_HOME/lib`; do
   		export TEZ_JARS=$TEZ_JARS:$TEZ_HOME/lib/$jar
	done
	export HIVE_AUX_JARS_PATH=/opt/module/hadoop-2.7.7/share/hadoop/common/hadoop-lzo-0.4.21-SNAPSHOT.jar$TEZ_JARS

#配置计算引擎
vim hive-stie.xml
	<property>
    	<name>hive.execution.engine</name>
    	<value>tez</value>
	</property>

#启动时不报错就OK