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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9824) LLAP: Native Vectorization of Map Join so previously CPU bound queries shift their bottleneck to I/O and make it possible for the rest of LLAP to shine ;)
Date Tue, 21 Apr 2015 20:10:59 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505656#comment-14505656
] 

Matt McCline commented on HIVE-9824:
------------------------------------

I switched over to using https://github.com/apache/hive from using  git://git.apache.org/hive.git
 because of the read error: Connection reset by peer problem.

I did notice when I generated the review board patch with this command line:
{noformat}
    git diff --no-ext-diff  HEAD^ > review_board_patch_07.txt
{noformat}

and this command line for the actual patch:
{noformat}
    git diff --no-ext-diff --no-prefix HEAD^ > HIVE-9824.07.patch
{noformat}

The files had the same length.... when they usually have different lengths.

> LLAP: Native Vectorization of Map Join so previously CPU bound queries shift their bottleneck
to I/O and make it possible for the rest of LLAP to shine ;)
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-9824
>                 URL: https://issues.apache.org/jira/browse/HIVE-9824
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>         Attachments: HIVE-9824.01.patch, HIVE-9824.02.patch, HIVE-9824.04.patch, HIVE-9824.06.patch,
HIVE-9824.07.patch
>
>
> Today's VectorMapJoinOperator is a pass-through that converts each row from a vectorized
row batch in a Java Object[] row and passes it to the MapJoinOperator superclass.
> This enhancement creates specialized vectorized map join operator classes that are optimized.



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