Daniel Templeton created HDFS-14382:
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Summary: The hdfs fsck command docs do not explain the meaning of
the reported fields
Key: HDFS-14382
URL: https://issues.apache.org/jira/browse/HDFS-14382
Project: Hadoop HDFS
Issue Type: Improvement
Components: documentation
Affects Versions: 3.2.0
Reporter: Daniel Templeton
The {{hdfs fsck}} command shows something like:
{noformat}FSCK started by root (auth:SIMPLE) from /172.17.0.2 for path /tmp at
Tue Mar 19 15:50:24 UTC 2019
.Status: HEALTHY
Total size: 179159051 B
Total dirs: 11
Total files: 1
Total symlinks: 0
Total blocks (validated): 2 (avg. block size 89579525 B)
Minimally replicated blocks: 2 (100.0 %)
Over-replicated blocks: 0 (0.0 %)
Under-replicated blocks: 0 (0.0 %)
Mis-replicated blocks: 0 (0.0 %)
Default replication factor: 1
Average block replication: 1.0
Corrupt blocks: 0
Missing replicas: 0 (0.0 %)
Number of data-nodes: 1
Number of racks: 1
FSCK ended at Tue Mar 19 15:50:24 UTC 2019 in 3 milliseconds
The filesystem under path '/tmp' is HEALTHY{noformat}
The fields are presumed to be self-explanatory, but I think that's a bold
assumption. In particular, it's not obvious how "mis-replicated" blocks differ
from "under-replicated" or "over-replicated" blocks. It would be nice to
explain the meaning of all the fields clearly in the docs.
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