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From "Hanisha Koneru (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11339) Support File IO sampling for Datanode IO profiling hooks
Date Fri, 13 Jan 2017 19:47:26 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Hanisha Koneru updated HDFS-11339:
    Attachment: HDFS-11339.001.patch

Thank you [~arpitagarwal] for the review. I have addressed your comments in patch v01.

> Support File IO sampling for Datanode IO profiling hooks
> --------------------------------------------------------
>                 Key: HDFS-11339
>                 URL: https://issues.apache.org/jira/browse/HDFS-11339
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>            Reporter: Hanisha Koneru
>            Assignee: Hanisha Koneru
>             Fix For: 3.0.0-alpha2
>         Attachments: HDFS-11339.000.patch, HDFS-11339.001.patch
> HDFS-10958 introduces instrumentation hooks around DataNode disk IO and HDFS-10959 adds
support for profiling hooks to expose latency statistics. 
> Instead of profiling all the file IO events, we can sample a fraction of the events and
profile them. The fraction to be sampled can be configurable.

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