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https://issues.apache.org/jira/browse/HIVE-7926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14136063#comment-14136063
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Brock Noland commented on HIVE-7926:
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Hi,
I noted that LLAP is turned on by default in the branch. When the work merged
to trunk, I think it should be disabled by default until it reaches maturity. I
understand it's *very* early and that you are working on a branch so please
don't feel the need to act on this immediately.
> long-lived daemons for query fragment execution, I/O and caching
> ----------------------------------------------------------------
>
> Key: HIVE-7926
> URL: https://issues.apache.org/jira/browse/HIVE-7926
> Project: Hive
> Issue Type: New Feature
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: LLAPdesigndocument.pdf
>
>
> We are proposing a new execution model for Hive that is a combination of
> existing process-based tasks and long-lived daemons running on worker nodes.
> These nodes can take care of efficient I/O, caching and query fragment
> execution, while heavy lifting like most joins, ordering, etc. can be handled
> by tasks.
> The proposed model is not a 2-system solution for small and large queries;
> neither it is a separate execution engine like MR or Tez. It can be used by
> any Hive execution engine, if support is added; in future even external
> products (e.g. Pig) can use it.
> The document with high-level design we are proposing will be attached shortly.
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