Display Hadoop cluster report.
$ hdfs dfsadmin -report
Configured Capacity: 63010750464 (58.68 GB) Present Capacity: 52346458112 (48.75 GB) DFS Remaining: 49855922176 (46.43 GB) DFS Used: 2490535936 (2.32 GB) DFS Used%: 4.76% Replicated Blocks: Under replicated blocks: 5797 Blocks with corrupt replicas: 0 Missing blocks: 0 Missing blocks (with replication factor 1): 0 Low redundancy blocks with highest priority to recover: 0 Pending deletion blocks: 0 Erasure Coded Block Groups: Low redundancy block groups: 0 Block groups with corrupt internal blocks: 0 Missing block groups: 0 Low redundancy blocks with highest priority to recover: 0 Pending deletion blocks: 0 ------------------------------------------------- Live datanodes (3): Name: 192.168.8.173:9866 (datanode1.example.org) Hostname: datanode1.example.org Rack: /rack-red Decommission Status : Normal Configured Capacity: 21003583488 (19.56 GB) DFS Used: 830136320 (791.68 MB) Non DFS Used: 2464727040 (2.30 GB) DFS Remaining: 16618201088 (15.48 GB) DFS Used%: 3.95% DFS Remaining%: 79.12% 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: Mon May 17 22:29:59 UTC 2021 Last Block Report: Mon May 17 22:26:03 UTC 2021 Num of Blocks: 5834 Name: 192.168.8.174:9866 (datanode2.example.org) Hostname: datanode2.example.org Rack: /rack-blue Decommission Status : Normal Configured Capacity: 21003583488 (19.56 GB) DFS Used: 830205952 (791.75 MB) Non DFS Used: 2464002048 (2.29 GB) DFS Remaining: 16618856448 (15.48 GB) DFS Used%: 3.95% DFS Remaining%: 79.12% 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: Mon May 17 22:29:59 UTC 2021 Last Block Report: Mon May 17 22:26:03 UTC 2021 Num of Blocks: 5835 Name: 192.168.8.175:9866 (datanode3.example.org) Hostname: datanode3.example.org Rack: /rack-red Decommission Status : Normal Configured Capacity: 21003583488 (19.56 GB) DFS Used: 830193664 (791.73 MB) Non DFS Used: 2464006144 (2.29 GB) DFS Remaining: 16618864640 (15.48 GB) DFS Used%: 3.95% DFS Remaining%: 79.12% 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: Mon May 17 22:29:59 UTC 2021 Last Block Report: Mon May 17 22:26:03 UTC 2021 Num of Blocks: 5835
There are additional options, but these will be described later.
hdfs dfsadmin [-report [-live] [-dead] [-decommissioning] [-enteringmaintenance] [-inmaintenance]]