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Posted to issues@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2019/09/17 15:59:00 UTC

[jira] [Commented] (ARROW-6554) [C++] Implement "background write" option for BufferedOutputStream

    [ https://issues.apache.org/jira/browse/ARROW-6554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931594#comment-16931594 ] 

Antoine Pitrou commented on ARROW-6554:
---------------------------------------

As answered on the async OutputStream issue, I'm not sure this is useful: writes are typically issued in the background already. Perhaps we would be hiding the cost of a system call or something, but not the actual I/O.

> [C++] Implement "background write" option for BufferedOutputStream
> ------------------------------------------------------------------
>
>                 Key: ARROW-6554
>                 URL: https://issues.apache.org/jira/browse/ARROW-6554
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>
> In such cases we would have to allocate a new buffer on subsequent writes (while a background write is completing), but it could yield beneficial performance improvements for high latency filesystems



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