#测试写能力
 hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.3.1-tests.jar TestDFSIO -write -nrFiles 1 -fileSize 128MB

#写速度
hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.3.1-tests.jar TestDFSIO -read  -nrFiles 1 -fileSize 128MB