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From "Bikas Saha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TEZ-376) Reduce Processor can parallelize I/O/Processor initialization
Date Mon, 19 Aug 2013 20:15:48 GMT

    [ https://issues.apache.org/jira/browse/TEZ-376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13744159#comment-13744159
] 

Bikas Saha commented on TEZ-376:
--------------------------------

Minor typo ""InitOututThread"
                
> Reduce Processor can parallelize I/O/Processor initialization
> -------------------------------------------------------------
>
>                 Key: TEZ-376
>                 URL: https://issues.apache.org/jira/browse/TEZ-376
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>         Attachments: TEZ-376.txt
>
>
> Reported by [~gopalv]. Reduce initialization can take a fair amount of time after shuffle
is complete - depending on how expensive the Reduce initialization is.
> Quote from Gopal's investigation
> 1.6 seconds is spent in ReflectionUtils.newInstance() -> ReflectionUtils.setConf()
of which 1.2 seconds is Utilities.getMapRedWork().

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