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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5538) Turn on vectorization by default.
Date Wed, 06 Aug 2014 18:12:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14087973#comment-14087973
] 

Ashutosh Chauhan commented on HIVE-5538:
----------------------------------------

If I understand correctly, it seems concern is that vectorization is not tested enough for
it to be turned on by default. If so, one possibility is to turn it on only for unit tests
(ie in data/conf/hive-site.xml) and leave the value still to be false in released product
(by having false in HiveConf.java) This will give us a way to test vectorization vigorously
in our unit tests and than turn it on in production only once we have sufficient confidence
in its stability. Sounds reasonable?

> Turn on vectorization by default.
> ---------------------------------
>
>                 Key: HIVE-5538
>                 URL: https://issues.apache.org/jira/browse/HIVE-5538
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Jitendra Nath Pandey
>            Assignee: Hari Sankar Sivarama Subramaniyan
>         Attachments: HIVE-5538.1.patch, HIVE-5538.2.patch, HIVE-5538.3.patch, HIVE-5538.4.patch,
HIVE-5538.5.patch, HIVE-5538.5.patch, HIVE-5538.6.patch
>
>
>   Vectorization should be turned on by default, so that users don't have to specifically
enable vectorization. 
>   Vectorization code validates and ensures that a query falls back to row mode if it
is not supported on vectorized code path. 



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