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Posted to issues@arrow.apache.org by "John Muehlhausen (Jira)" <ji...@apache.org> on 2019/10/09 20:40:00 UTC

[jira] [Created] (ARROW-6840) [C++/Python] retrieve fd of open memory mapped file and Open() memory mapped file by fd

John Muehlhausen created ARROW-6840:
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             Summary: [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


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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