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https://issues.apache.org/jira/browse/HDFS-11477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15893248#comment-15893248
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Arpit Agarwal commented on HDFS-11477:
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Thanks [~hanishakoneru]. +1 pending Jenkins.

> Combine FileIO Profiling Enable and Sampling Fraction Config Key into one
> -------------------------------------------------------------------------
>
>                 Key: HDFS-11477
>                 URL: https://issues.apache.org/jira/browse/HDFS-11477
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Hanisha Koneru
>            Assignee: Hanisha Koneru
>            Priority: Minor
>         Attachments: HDFS-11477.000.patch, HDFS-11477.001.patch, 
> HDFS-11477.002.patch
>
>
> For Profiling FileIO events, there are 2 keys:
> - DFS_DATANODE_ENABLE_FILEIO_PROFILING_KEY for enabling the hooks
> - DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY for setting the 
> sampling fraction 
> We can instead have only the sampling fraction key and set it to 0 if we want 
> to disable profiling.



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