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Posted to issues@tez.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2014/10/20 18:49:34 UTC

[jira] [Commented] (TEZ-1656) Grouping of splits should maintain the original ordering of splits within a group

    [ https://issues.apache.org/jira/browse/TEZ-1656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14177093#comment-14177093 ] 

Bikas Saha commented on TEZ-1656:
---------------------------------

[~hitesh] [~sseth] [~vikram.dixit] Please review.

> Grouping of splits should maintain the original ordering of splits within a group
> ---------------------------------------------------------------------------------
>
>                 Key: TEZ-1656
>                 URL: https://issues.apache.org/jira/browse/TEZ-1656
>             Project: Apache Tez
>          Issue Type: Task
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>         Attachments: TEZ-1656.1.patch, TEZ-1656.2.patch, TEZ-1656.3.patch
>
>
> Sometimes the original splits may have an ordering (eg. splits from a sorted file). Maintaining the ordering of splits inside a group maintains the sort order.
> The node level grouping maintains ordering. When collecting leftover groups for rack level grouping, the ordering is lost in current code.



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