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From "Hanisha Koneru (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11477) Combine FileIO Profiling Enable and Sampling Fraction Config Key into one
Date Wed, 01 Mar 2017 00:40:45 GMT
Hanisha Koneru created HDFS-11477:
-------------------------------------

             Summary: 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


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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