About
Runs the HDFS filesystem checking utility for various inconsistencies.
Unlike a traditional fsck utility for native file systems, this command does not correct the errors it detects.
It will report problems with various files, such as:
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Syntax
- By default fsck ignores open files but provides an option to select all files during reporting.
- fsck can be run on the whole file system or on a subset of files.
fsck is a command if hdfs
bin/hdfs fsck
Example
hdfs fsck /
Connecting to namenode via http://ip:50070/fsck?ugi=ubuntu&path=%2F
FSCK started by ubuntu (auth:SIMPLE) from /ip for path / at Tue Jul 18 04:34:19 UTC 2017
Status: HEALTHY
Total size: 0 B
Total dirs: 1
Total files: 0
Total symlinks: 0
Total blocks (validated): 0
Minimally replicated blocks: 0
Over-replicated blocks: 0
Under-replicated blocks: 0
Mis-replicated blocks: 0
Default replication factor: 3
Average block replication: 0.0
Corrupt blocks: 0
Missing replicas: 0
Number of data-nodes: 32
Number of racks: 1
FSCK ended at Tue Jul 18 04:34:19 UTC 2017 in 1 milliseconds
The filesystem under path '/' is HEALTHY