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  • Hadoop操作命令

    全局命令

    全部启动:start-all.sh

    全部关闭:stop-all.sh

    启动全部HDFS服务:start-dfs.sh

    关闭全部HDFS服务:stop-dfs.sh

    启动全部YARN服务:start-yarn.sh

    关闭全部YARN服务:stop-yarn.sh

    单个服务命令

    启动NN:hadoop-daemon.sh start namenode

    启动DN:hadoop-daemon.sh start datanode

    启动All-DN:hadoop-daemons.sh start datanode  slave

    启动JN:hadoop-daemon.sh start journalnode

    启动SNN:hadoop-daemon.sh start secondarynamenode 

    启动ZKFC:hadoop-daemon.sh start zkfc

    启动RM: yarn-daemon.sh start resourcemanager

    启动NM: yarn-daemons.sh start nodemanager

    启动HS:  mr-jobhistory-daemon.sh stop historyserver

     

    其他命令

    查看NameNode状态:hdfs haadmin -getServiceState nn1

    NameNode主备切换:hdfs haadmin -failover nn2  nn1

    更改NameNode状态:hdfs haadmin -transitionToActive -forcemanual nn1

    获取当前活动的NameNode:hdfs getconf -confKey fs.defaultFS

    启动数据均衡,默认阈值为 10%:start-balancer.sh

    启动数据均衡,指定阈值为 5%:start-balancer.sh –threshold 5

    查看数据健康状态:hdfs fsck /

    查看是否处于安全模式:hdfs dfsadmin -safemode get

    退出安全状态:hadoop dfsadmin -safemode leave

    元数据修复:hadoop namenode -recover

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  • 原文地址:https://www.cnblogs.com/chuijingjing/p/14640592.html
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