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https://issues.apache.org/jira/browse/ARROW-6840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17026800#comment-17026800
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Antoine Pitrou commented on ARROW-6840:
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[~jgm-ktg] Do you want to submit a PR for this?
> [C++/Python] retrieve fd of open memory mapped file and Open() memory mapped
> file by fd
> ---------------------------------------------------------------------------------------
>
> Key: ARROW-6840
> URL: https://issues.apache.org/jira/browse/ARROW-6840
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: John Muehlhausen
> Priority: Minor
>
> We want to retrieve the file descriptor of a memory mapped file for the
> purpose of transferring it across process boundaries. On the receiving end,
> we want to be able to map a file based on the file descriptor rather than the
> path.
> This helps with race conditions when the path may have been unlinked.
> cf
> [https://lists.apache.org/thread.html/83373ab00f552ee8afd2bac2b2721468b3f28fe283490e379998453a@%3Cdev.arrow.apache.org%3E]
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