hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13617) LLAP: support non-vectorized execution in IO
Date Tue, 26 Apr 2016 21:33:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258969#comment-15258969
] 

Lefty Leverenz commented on HIVE-13617:
---------------------------------------

Aha, HIVE-11417 discusses VectorizedRowBatch.  Is that it?

> LLAP: support non-vectorized execution in IO
> --------------------------------------------
>
>                 Key: HIVE-13617
>                 URL: https://issues.apache.org/jira/browse/HIVE-13617
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>
> Two approaches - a separate decoding path, into rows instead of VRBs; or decoding VRBs
into rows on a higher level (the original LlapInputFormat). I think the latter might be better
- it's not a hugely important path, and perf in non-vectorized case is not the best anyway,
so it's better to make do with much less new code and architectural disruption. 
> Some ORC patches in progress introduce an easy to reuse (or so I hope, anyway) VRB-to-row
conversion, so we should just use that.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message