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https://issues.apache.org/jira/browse/HIVE-17006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HIVE-17006:
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Attachment: HIVE-17006.patch
The initial patch after some cleanup, additions and fixes.
This shares a lot of the code with HIVE-15665 and the two metadata caches need
to be merged. Presumably one of these would be committed first and the other
would be merged.
> LLAP: Parquet caching
> ---------------------
>
> Key: HIVE-17006
> URL: https://issues.apache.org/jira/browse/HIVE-17006
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-17006.patch, HIVE-17006.WIP.patch
>
>
> There are multiple options to do Parquet caching in LLAP:
> 1) Full elevator (too intrusive for now).
> 2) Page based cache like ORC (requires some changes to Parquet or
> copy-pasted).
> 3) Cache disk data on column chunk level as is.
> Given that Parquet reads at column chunk granularity, (2) is not as useful as
> for ORC, but still a good idea. I messaged the dev list about it but didn't
> get a response, we may follow up later.
> For now, do (3).
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