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https://issues.apache.org/jira/browse/HDFS-3246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16770748#comment-16770748
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Zheng Hu commented on HDFS-3246:
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Discussed with [~jojochuang] in HBASE-21879 (thanks for his helpful comment),
so this feature should go into Hadoop2.x, seems we done part of work in
HDFS-8901(the internal bytebuffer pread implementation), while it has not been
backported to our Hadoop2.x.
I mean we should make both this issue and HDFS-8901 go into Hadoop2.x. Thanks.
> pRead equivalent for direct read path
> -------------------------------------
>
> Key: HDFS-3246
> URL: https://issues.apache.org/jira/browse/HDFS-3246
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client, performance
> Affects Versions: 3.0.0-alpha1
> Reporter: Henry Robinson
> Assignee: Chen Zhang
> Priority: Major
>
> There is no pread equivalent in ByteBufferReadable. We should consider adding
> one. It would be relatively easy to implement for the distributed case
> (certainly compared to HDFS-2834), since DFSInputStream does most of the
> heavy lifting.
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