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https://issues.apache.org/jira/browse/ARROW-501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16594123#comment-16594123
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Antoine Pitrou commented on ARROW-501:
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Ah... Well, it would make more sense to treat a memory-mapped file as a memory
area, not a file. That's the whole point of memory-mapped files after all. I'm
not sure the current abstraction makes sense (though there is some magical
thought around where people seem to think that mmap() makes things
intrinsically faster than read() calls).
> [C++] Implement concurrent / buffering InputStream for streaming data use
> cases
> -------------------------------------------------------------------------------
>
> Key: ARROW-501
> URL: https://issues.apache.org/jira/browse/ARROW-501
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Labels: csv
> Fix For: 0.13.0
>
>
> Related to ARROW-500, when processing an input data stream, we may wish to
> continue buffering input (up to an maximum buffer size) in between
> synchronous Read calls
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