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Posted to hdfs-issues@hadoop.apache.org by "Shilun Fan (Jira)" <ji...@apache.org> on 2024/01/04 07:45:00 UTC
[jira] [Updated] (HDFS-11350) Document the missing settings relevant to DataNode disk IO statistics
[ https://issues.apache.org/jira/browse/HDFS-11350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shilun Fan updated HDFS-11350:
------------------------------
Target Version/s: 3.5.0 (was: 3.4.0)
> 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
> Attachments: HDFS-11350.001.patch
>
>
> 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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