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https://issues.apache.org/jira/browse/ARROW-560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17046781#comment-17046781
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Antoine Pitrou commented on ARROW-560:
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One caveat here is that positioned reads (ReadAt) are not supported with
zero-copy in libhdfs. I don't know why that is, as I don't understand what
would be the impossibility. I guess it just hasn't been coded. So I'm not sure
it's worthwhile doing this, what do you think?
> [C++] Add support for zero-copy libhdfs reads
> ---------------------------------------------
>
> Key: ARROW-560
> URL: https://issues.apache.org/jira/browse/ARROW-560
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Labels: filesystem
>
> See *Rz* functions in
> https://github.com/apache/arrow/blob/master/cpp/thirdparty/hadoop/include/hdfs.h
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