hadoop进入和退出安全模式

进入和退出安全模式

[root@localhost bin]# ./hdfs dfsadmin -safemode enter
15/08/03 07:26:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Safe mode is ON
[root@localhost bin]# ./hdfs dfsadmin -safemode leave
15/08/03 07:26:58 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Safe mode is OFF

负载均衡

1. [root@localhost sbin]# ./start-balancer.sh
2. starting balancer, logging to /home/frank/hadoop/hadoop -2.6 .0-cdh5 .4 .4/logs/hadoop-root-balancer-localhost.localdomain.out