如何在mac上创建一个hadoop环境
https://www.jianshu.com/p/dc6829389298
如何创建一个directory
https://blog.csdn.net/macanv/article/details/52729625
hadoop fs -put /home/hadoop/input hdfs://node1:9000/tmp
如何写一个app on yarn
http://blog.madhukaraphatak.com/running-scala-programs-on-yarn/