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https://issues.apache.org/jira/browse/HADOOP-9689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13698472#comment-13698472
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Colin Patrick McCabe commented on HADOOP-9689:
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Hi Jacques,
I've been working on a patch that enables mmap support in HDFS. I'm going to
post it this week.
Since you mentioned HADOOP-8148, I assume that the zero-copy work you're doing
here relates to eliminating the buffer copies in the decompression codecs by
replacing byte[] copies with the use of ByteBuffer and so forth. If you are
also working on mmap, let's coordinate on HDFS-4953.
You might also want to remove the 'HDFS' from the title if this JIRA is in
Hadoop common... or move it to HDFS. :)
C.
> Implement HDFS Zero-copy reading
> --------------------------------
>
> Key: HADOOP-9689
> URL: https://issues.apache.org/jira/browse/HADOOP-9689
> Project: Hadoop Common
> Issue Type: New Feature
> Reporter: Jacques Nadeau
>
> Leverage the work in https://issues.apache.org/jira/browse/HADOOP-8148 to
> support zero copy reading of columnar file formats for improved performance.
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