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https://issues.apache.org/jira/browse/HDFS-3246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775734#comment-16775734
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Wei-Chiu Chuang commented on HDFS-3246:
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I am not an expert in client side input stream implementations. But it seems
you would also want CryptoInputStream to implement
ByteBufferPositionedReadable, otherwise it won't help encrypted cluster.
> 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: Sahil Takiar
> Priority: Major
> Attachments: HDFS-3246.001.patch, HDFS-3246.002.patch,
> HDFS-3246.003.patch, HDFS-3246.004.patch
>
>
> 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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