十一、集群启动/停止方式总结
1.各个模块分开启动/停止（配置ssh是前提）常用
#1.整体启动/停止HDFS
start-dfs.sh/stop-dfs.sh
#2.整体启动/停止YARN
start-yarn.sh/stop-yarn.sh
2.各个服务组件逐一启动/停止
#1.分别启动/停止HDFS组件
hdfs --daemon start/stop namenode/datanode/secondarynamenode
#2.启动/停止YARN
yarn --daemon start/stop resourcemanager/nodemanager
