[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fVNEW2m_9LdIPPj73QnVh3UmUyjSFLkNjpXuS1RTIjtI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":21,"type":22},[],"2026-05-19 14:37:20",377625918,[8,9],"正确","错误",{"courseId":11,"courseImg":12,"courseName":13},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","启动hdfs集群前,应该先启动zookeeper集群",[16,23,28,33,38,41,46,51,56,61],{"answer":17,"createTime":5,"id":18,"options":19,"question":20,"source":21,"type":22},[],377625914,[8,9],"我们可以到官网(地址:https:\u002F\u002Farchive.apache.org\u002Fdist\u002Fhadoop\u002Fcommon\u002F)下载Hadoop稳定版本的安装包","v1",3,{"answer":24,"createTime":5,"id":25,"options":26,"question":27,"source":21,"type":22},[],377625915,[8,9],"修改hadoop-env.sh配置文件,主要配置跟hadoop环境相关的变量,这里主要修改JAVA_HOME的安装目录",{"answer":29,"createTime":5,"id":30,"options":31,"question":32,"source":21,"type":22},[],377625916,[8,9],"slaves文件是根据集群规划配置DataNode节点所在的主机名",{"answer":34,"createTime":5,"id":35,"options":36,"question":37,"source":21,"type":22},[],377625917,[8,9],"每个namenode都需要格式化",{"answer":39,"createTime":5,"id":6,"options":40,"question":14,"source":21,"type":22},[],[8,9],{"answer":42,"createTime":5,"id":43,"options":44,"question":45,"source":21,"type":22},[],377625919,[8,9],"bin\u002Fhdfs dfs -ls \u002F 的作用为显示根目录下的文件列表",{"answer":47,"createTime":5,"id":48,"options":49,"question":50,"source":21,"type":22},[],377625920,[8,9],"bin\u002Fhdfs dfs -cat \u002Ftest\u002Fwords.log为查看hdfs下\u002Ftest目录中words.log的内容",{"answer":52,"createTime":5,"id":53,"options":54,"question":55,"source":21,"type":22},[],377625921,[8,9],"bin\u002Fhdfs dfs -mkdir \u002Ftest为在hdfs上的根目录下创建test目录",{"answer":57,"createTime":5,"id":58,"options":59,"question":60,"source":21,"type":22},[],377625922,[8,9],"在mapred-site.xml中如下配置: <configuration> <property> <name>mapreduce.framework.name<\u002Fname> <value>yarn<\u002Fvalue> <\u002Fproperty> <\u002Fconfiguration> 指定运行mapreduce的环境为YARN",{"answer":62,"createTime":5,"id":63,"options":64,"question":65,"source":21,"type":22},[],377625923,[8,9],"在hadoop1节点上,使用脚本一键启动YARN集群,具体操作如下所示 [hadoop@hadoop1 hadoop]$ sbin\u002Fstart-yarn.sh"]