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Posted to issues@tez.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2015/01/08 00:18:36 UTC

[jira] [Updated] (TEZ-1095) Enable tez.runtime.shuffle.memory-to-memory.enable for mem-to-mem merging

     [ https://issues.apache.org/jira/browse/TEZ-1095?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siddharth Seth updated TEZ-1095:
--------------------------------
    Target Version/s: 0.7.0

> Enable tez.runtime.shuffle.memory-to-memory.enable for mem-to-mem merging
> -------------------------------------------------------------------------
>
>                 Key: TEZ-1095
>                 URL: https://issues.apache.org/jira/browse/TEZ-1095
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Rajesh Balamohan
>
> Currently tez.runtime.shuffle.memory-to-memory.enable is set to false by default.  We need to evaluate the usefulness of this parameter and enable it by default if it provides good perf boosts.  
> There is also a possibility that waitForInMemoryMerge() will return in sub milliseconds when this parameter is enabled, causing pressure on network resources.  Related JIRA: https://issues.apache.org/jira/browse/TEZ-1091



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