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Posted to issues@tez.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2014/11/05 05:23:33 UTC

[jira] [Commented] (TEZ-1733) TezMerger should sort FileChunks on size when merging

    [ https://issues.apache.org/jira/browse/TEZ-1733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14197466#comment-14197466 ] 

Gopal V commented on TEZ-1733:
------------------------------

This is sufficient & low-risk enough to satisfy the merger IO issues.

LGTM - +1.

> TezMerger should sort FileChunks on size when merging
> -----------------------------------------------------
>
>                 Key: TEZ-1733
>                 URL: https://issues.apache.org/jira/browse/TEZ-1733
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.5.2
>            Reporter: Gopal V
>            Assignee: Prakash Ramachandran
>            Priority: Critical
>         Attachments: TEZ-1733.1.patch, TEZ-1733.1.patch, TEZ-1733.2.patch, TEZ-1733.3.patch
>
>
>  MAPREDUCE-3685 fixed the Merger sort order for file chunks to use the decompressed size, to cut-down on CPU and IO costs.
> TezMerger needs an equivalent sorted TreeSet which sorts by the data  by size.



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