1. 查询集群 存储情况

 1.查看客户端默认的Block大小

hdfs getconf -confKey dfs.blocksize
134217728=128M


2.查看指定文件的Block大小

hadoop fs -stat %o hdfs://localhost/user/harsh/file.txt
134217728=128M

3.查看当前环境已用容量
hadoop fs -du -h -s /.
2.4 G  7.6 G  /

4.查看当前DataNode 整体信息

hadoop dfsadmin -report

Configured Capacity: 84416008192 (78.62 GB)   配置容量
Present Capacity: 58195824640 (54.20 GB)      现在容量 = 剩余容量 + 已用容量
DFS Remaining: 55540457472 (51.73 GB)         剩余容量
DFS Used: 2655367168 (2.47 GB)                已用容量
DFS Used%: 4.56%                              已用容量百分比
Replicated Blocks:
        Under replicated blocks: 1091
        Blocks with corrupt replicas: 0
        Missing blocks: 0
        Missing blocks (with replication factor 1): 0
        Low redundancy blocks with highest priority to recover: 1091
        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 (1): -- 活跃节点数

Name: 10.0.24.10:9866 (gaocun)
Hostname: gaocun
Decommission Status : Normal   节点状态
Configured Capacity: 84416008192 (78.62 GB)
DFS Used: 2655367168 (2.47 GB)
Non DFS Used: 22681788416 (21.12 GB)
DFS Remaining: 55540457472 (51.73 GB)
DFS Used%: 3.15%
DFS Remaining%: 65.79%
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 Mar 14 16:26:07 CST 2022
Last Block Report: Mon Mar 14 14:10:55 CST 2022
Num of Blocks: 1091


Configured Capacity: 197121124450304 (179.28 TB)
Present Capacity: 183532805579324 (166.92 TB)
DFS Remaining: 152495014085886 (138.69 TB)
DFS Used: 31037791493438 (28.23 TB)
DFS Used%: 16.91%
Under replicated blocks: 0
Blocks with corrupt replicas: 0
Missing blocks: 0
Missing blocks (with replication factor 1): 0