啟動和關閉Hadoop集群命令步驟

啟動和關閉Hadoop集群命令步驟總結：

1. 在master上啟動hadoop-daemon.sh start namenode.
2. 在slave上啟動hadoop-daemon.sh start datanode.
3. 用jps指令觀察執行結果.
4. 用hdfs dfsadmin -report觀察集群配置情況.
5. 通過http://npfdev1:50070界面觀察集群運行情況.(如果遇到問題 看 https://www.cnblogs.com/zlslch/p/6604189.html )
6. 用hadoop-daemon.sh stop ...手工關閉集群.

 

 

1. 關閉NodeManager 、ResourceManager和HistoryManager

[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh stop resourcemanager

[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh stop nodemanager

[atguigu@hadoop101 hadoop-2.7.2]$ sbin/mr-jobhistory-daemon.sh stop historyserver

1. 啟動NodeManager 、ResourceManager和HistoryManager

[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh start resourcemanager

[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh start nodemanager

[atguigu@hadoop101 hadoop-2.7.2]$ sbin/mr-jobhistory-daemon.sh start historyserver

1. 刪除HDFS上已經存在的輸出文件

[atguigu@hadoop101 hadoop-2.7.2]$ bin/hdfs dfs -rm -R /user/atguigu/output