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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TEZ-376) Reduce Processor can parallelize I/O/Processor initialization
Date Mon, 19 Aug 2013 18:46:48 GMT

     [ https://issues.apache.org/jira/browse/TEZ-376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Siddharth Seth updated TEZ-376:

    Attachment: TEZ-376.txt

Attaching a patch to parallelize the initialization.
[~hitesh], could you please take a look. 

Will update the patch with similar changes on the Map side as well if this looks reasonable.
> 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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