(1)配置集群
(a)配置hadoop-2.7.2/etc/hadoop/yarn-env.sh
配置一下JAVA_HOME
export JAVA_HOME=/home/hadoop/bigdatasoftware/jdk1.8.0_161 |
(b)配置yarn-site.xml
<!-- reducer获取数据的方式 --> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <!-- 指定YARN的ResourceManager的地址 --> <property> <name>yarn.resourcemanager.hostname</name> <value>hadoop-002</value> </property> |
(c)配置:mapred-env.sh
配置一下JAVA_HOME
export JAVA_HOME=/home/hadoop/bigdatasoftware/jdk1.8.0_161
<!-- 指定mr运行在yarn上 --> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> |
(d)配置: (对mapred-site.xml.template重新命名为) mapred-site.xml
(2)启动集群
(a)启动resourcemanager
sbin/yarn-daemon.sh start resourcemanager
(b)启动nodemanager
sbin/yarn-daemon.sh start nodemanager
(3)集群操作
(a)yarn的浏览器页面查看
http://hadoop-001:8088/cluster
(b)删除文件系统上的output文件
bin/hdfs dfs -rm -R /home/hadoop/mapreduce/wordcount/output
(c)执行mapreduce程序
bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar wordcount /home/hadoop/mapreduce/wordcount/input /user/hadoop/mapreduce/wordcount/output
(d)查看运行结果
bin/hdfs dfs -cat /home/hadoop/mapreduce/wordcount/output/*