Yiqun Lin created HDFS-11350:
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Summary: Document the missing settings relevant to DataNode disk
IO statistics
Key: HDFS-11350
URL: https://issues.apache.org/jira/browse/HDFS-11350
Project: Hadoop HDFS
Issue Type: Bug
Components: documentation
Affects Versions: 3.0.0-alpha2
Reporter: Yiqun Lin
Assignee: Yiqun Lin
Priority: Minor
HDFS-11299 and HDFS-11339 introduced some new setting relevant to profiling
hooks to expose latency statistics around DataNode disk IO. These settings
should be intended for users but they are not documented. Totally three
relevant settings:
1.dfs.datanode.enable.fileio.profiling
2.dfs.datanode.enable.fileio.fault.injection
3.dfs.datanode.fileio.profiling.sampling.fraction
Actually, only the setting {{dfs.datanode.enable.fileio.fault.injection}} don't
need to be documented.
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