????1?????????
????HDFS????????????????????????????????????????????????????DataNode??????????????????????????????????????????????
????2??????????
????· ???????
???????????????????к?????????ο?: http://zwkufo.blog.163.com/blog/static/258825120141283942244/
????· ????HDFS
???????hdfs-size.xml???????
???????????????????????datanode?????????hdfs-size.xml?????dfs.datanode.data.dir??????????????
????<property>
????<name>dfs.datanode.data.dir</name>
????<value>/opt/PaaS/Talas/data/hdfs??/opt/PaaS/Talas/data/hdfs2</value>
????</property>
???????????DataNode????
??????????????????????Datanode
????./hdfs dfsadmin -reconfig datanode 10.5.24.139:50020 start
???????10.5.24.139?????????Datanode???Datanode?????IPC??????50020
??????????? Hadoop/bin/hdfs dfsadmin -report
????3?????
???????????????????????????????????????????????Ч?????????dfs.datanode.data.dir?ж??????????