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https://issues.apache.org/jira/browse/ARROW-2427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16447698#comment-16447698
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ASF GitHub Bot commented on ARROW-2427:
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pitrou commented on issue #1867: ARROW-2427: [C++] Implement ReadAt properly
URL: https://github.com/apache/arrow/pull/1867#issuecomment-383488993
Ok, rebased.
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> [C++] ReadAt implementations suboptimal
> ---------------------------------------
>
> Key: ARROW-2427
> URL: https://issues.apache.org/jira/browse/ARROW-2427
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.9.0
> Reporter: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
>
> The {{ReadAt}} implementations for at least {{OSFile}} and
> {{MemoryMappedFile}} take the file lock and seek. They could instead read
> directly from the given offset, allowing concurrent I/O from multiple threads.
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