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From "Sergey Shelukhin (JIRA)" <>
Subject [jira] [Commented] (HIVE-9729) LLAP: design and implement proper metadata cache
Date Fri, 13 Mar 2015 02:03:38 GMT


Sergey Shelukhin commented on HIVE-9729:

Most of this is now committed, need to add some more tests (q file passes)

> LLAP: design and implement proper metadata cache
> ------------------------------------------------
>                 Key: HIVE-9729
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>             Fix For: llap
> Simple approach: add external priorities to data cache, read metadata parts of orc file
into it. Advantage: simple; consistent management (no need to coordinate sizes and eviction
between data and metadata caches, etc); disadvantage - have to decode every time.
> Maybe add decoded metadata cache on top - fixed size, small and opportunistic? Or some
other approach.

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