1)namenode:
        core-site.xml文件中决定:
            <property>
                <name>fs.defaultFS</name>
                <value>hdfs://chavin.king:9000</value>
            </property>
    2)secondarynamenode:

        hdfs-site.xml文件中决定:
            <property>
                <name>dfs.namenode.secondary.http-address</name>
                <value>db01:50090</value>
            </property>
           
    3)resourcemanager决定:
        yarn-site.xml文件中:

            <property>
                <name>yarn.resourcemanager.hostname</name>
                <value>db01</value>
            </property>
           
    4)datanode和nodemanager决定:
        slaves文件中通过每行主机名或ip地址确定
   
    5)jobhistoryserver决定:
        mapred-site.xml文件中:

            <property>
                <name>mapreduce.jobhistory.address</name>
                <value>db01:10020</value>
            </property>

            <property>
                <name>mapreduce.jobhistory.webapp.address</name>
                <value>db01:19888</value>
            </property>

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