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Posted to dev@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/02/19 23:13:11 UTC

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

Sergey Shelukhin created HIVE-9729:
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             Summary: 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


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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