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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/04/24 13:07:01 UTC

[GitHub] [arrow] rdettai commented on pull request #6949: ARROW-7681: [Rust] Explicitly seeking a BufReader will discard the internal buffer (2)

rdettai commented on pull request #6949:
URL: https://github.com/apache/arrow/pull/6949#issuecomment-618997029


   > Originally we designed it this way so that we can concurrently read multiple column chunks after obtaining file handle from a single row group. Since the file handle is shared between these we wanted to provide thread safety on top of it.
   
   I'm not sure to understand how this could be the concern of the `FileSource`. Its the reader (file handle) that is passed to it that should be thread safe, and he should not create the Mutex himself.


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