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Posted to issues@tez.apache.org by "Rajesh Balamohan (Jira)" <ji...@apache.org> on 2020/08/05 05:54:00 UTC

[jira] [Updated] (TEZ-4216) RLE check in MergeManager::finalMerge could be disabled

     [ https://issues.apache.org/jira/browse/TEZ-4216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajesh Balamohan updated TEZ-4216:
----------------------------------
    Attachment: TEZ-4216.1.patch

> RLE check in MergeManager::finalMerge could be disabled
> -------------------------------------------------------
>
>                 Key: TEZ-4216
>                 URL: https://issues.apache.org/jira/browse/TEZ-4216
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Priority: Major
>         Attachments: TEZ-4216.1.patch
>
>
> [https://github.com/apache/tez/blob/master/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/shuffle/orderedgrouped/MergeManager.java#L1319]
>  
> [https://github.com/apache/tez/blob/master/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/sort/impl/TezMerger.java]
>  
> MergerManager's finalMerger() need not check for RLE. We could pass on the RLE information from sorter via events. Until then, it would be good to turn off RLE here.
>  



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