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https://issues.apache.org/jira/browse/ORC-2160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gang Wu resolved ORC-2160.
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Fix Version/s: 3.0.0
2.3.1
Resolution: Fixed
Issue resolved by pull request 2616
[https://github.com/apache/orc/pull/2616]
> Expose prefetch range planning via Reader::preBufferRange
> ---------------------------------------------------------
>
> Key: ORC-2160
> URL: https://issues.apache.org/jira/browse/ORC-2160
> Project: ORC
> Issue Type: Improvement
> Reporter: Fang Yonghao
> Assignee: Fang Yonghao
> Priority: Major
> Fix For: 3.0.0, 2.3.1
>
>
> Because preBuffer does not expose the planned ranges, but external users now
> have a multi-Reader scenario where different Readers prefetch different
> ranges of the same file and share an external prebuffer cache, so they must
> know the precise ranges in advance to coordinate prefetching and avoid
> duplicated work.
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