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Posted to issues@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/02/24 21:08:04 UTC

[jira] [Assigned] (HIVE-9729) LLAP: design and implement proper metadata cache

     [ https://issues.apache.org/jira/browse/HIVE-9729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin reassigned HIVE-9729:
--------------------------------------

    Assignee: Sergey Shelukhin

> LLAP: design and implement proper metadata cache
> ------------------------------------------------
>
>                 Key: HIVE-9729
>                 URL: https://issues.apache.org/jira/browse/HIVE-9729
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>
> 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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