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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11477) Simplify file IO profiling configuration
Date Mon, 06 Mar 2017 18:51:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15897822#comment-15897822
] 

Arpit Agarwal commented on HDFS-11477:
--------------------------------------

Thanks [~hanishakoneru]. +1 for the v03 patch, pending Jenkins.

> Simplify file IO profiling configuration
> ----------------------------------------
>
>                 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,
HDFS-11477.003.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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