hadoop启动前配置（CentOS6.4）

cd /usr/local/apps/hadoop-2.5.2/etc/hadoop

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vi hadoop-env.sh
修改

export JAVA_HOME=/usr/local/apps/jdk1.7.0_79/

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vi core-site.xml
configuration中添加

<property><name>fs.defaultFS</name>  <!-- 主节点 --><value>hdfs://hadoop-server-00:9000/</value></property><property><name>hadoop.tmp.dir</name><value>/usr/local/apps/hadoop-2.5.2/tmp/</value></property>

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vi hdfs-site.xml
添加

<property><name>dfs.replication</name><value>1</value></property>

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改名
mv mapred-site.xml.template mapred-site.xml

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vi mapred-site.xml
添加

<property><name>mapreduce.framework.name</name><value>yarn</value></property>

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vi yarn-site.xml
添加

<property><name>yarn.resourcemanager.hostname</name>  <!-- yarn主节点 --><value>hadoop-server-00</value></property><property><name>yarn.nodemanager.aux-services</name><value>mapreduce_shuffle</value></property>

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vi slaves
修改为

hadoop-server-00