Hadoop启动方式

启动方式一：

启动NameNode

hdfs --daemon start namenode

启动DataNode

hdfs --daemon start datanode

启动SecondaryNameNode

hdfs --daemon start secondarynamenode

启动NodeManager

yarn --daemon start nodemanger

启动ResourceManager

yarn --daemon start resourcemanager

启动HistoryServer

mapred --daemon start historyserver

启动方式二：

start-dfs.sh == hdfs --daemon start namenode+hdfs --daemon start datanode+hdfs --daemon start secondarynamenode
start-yarn.sh == yarn --daemon start nodemanger+yarn --daemon start resourcemanager

启动方式三：

start-all.sh ==start-dfs.sh +start-yarn.sh