HDFS执行getDatanodeReport输出信息：
Name: 192.168.101.100:50010 (192.168.101.100) Hostname: bigsrv Decommission Status : Normal Configured Capacity: 16421093376 (15.29 GB) DFS Used: 3489792 (3.33 MB) Non DFS Used: 4074287104 (3.79 GB) DFS Remaining: 12343316480 (11.50 GB) DFS Used%: 0.02% DFS Remaining%: 75.17% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Sun Sep 02 21:00:59 CST 2018