YARN Basics
YARN Services相关的命令:
Start/Stop ResourceManager
$HADOOP_HOME/sbin/yarn-daemon.sh start resourcemanager
$HADOOP_HOME/sbin/yarn-daemon.sh stop resourcemanagerStart/Stop NodeManager
$HADOOP_HOME/sbin/yarn-daemon.sh start nodemanager
$HADOOP_HOME/sbin/yarn-daemon.sh stop nodemanagerYARN JobHistoryServer service
$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver节点健康状况检测是YARN为每个NodeManager提供的机制，通过该机制，NodeManager可通过心跳机制将节点健康状况实时汇报给ResourceManager，而ResourceManager则会根据每个NodeManager的健康状况适当调整分配的任务数目。当NodeManager认为自己的健康状况“欠佳”时，可让ResourceManager不再分配任务，待健康状况好转时，再分配新任务。(yarn.nodemanager.health-checker.script.path)
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Hadoop Web Interfaces
| No | Name | Link |
|---|---|---|
| 1 | NameNode Web | http://10.213.210.238:50070/dfshealth.html |
| 2 | NameNode Conf | http://10.213.210.238:50070/conf |
| 3 | DataNode Web | http://10.213.211.92:50075/datanode.html |
| 4 | DataNode Conf | http://10.213.211.92:50075/conf |
| 5 | ResourceManager Web | http://10.213.210.238:8088/cluster |
| 6 | ResourceManager Conf | http://10.213.210.238:8088/conf |
| 7 | NodeManager Web | http://10.213.211.92:8042/node |
| 8 | NodeManager Conf | http://10.213.211.92:8042/conf |
| 9 | HBase Master Web | http://10.211.200.224:16010/master-status |
| 10 | HBase RegionServer Web | http://10.211.200.210:16030/rs-status |