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https://issues.apache.org/jira/browse/HDFS-7014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162247#comment-14162247
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Haohui Mai commented on HDFS-7014:
----------------------------------

Please correct me if I'm wrong, the outputstream implements the writing logic 
of Hadoop v1, it might not work with Hadoop 2. Maybe we can exclude it in this 
patch?

> Implement input and output streams to DataNode for native client
> ----------------------------------------------------------------
>
>                 Key: HDFS-7014
>                 URL: https://issues.apache.org/jira/browse/HDFS-7014
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Zhanwei Wang
>            Assignee: Colin Patrick McCabe
>         Attachments: 0001-HDFS-7014-001.patch, HDFS-7014.patch
>
>
> Implement Client - Namenode RPC protocol and support Namenode HA.
> Implement Client - Datanode RPC protocol.
> Implement some basic server side class such as ExtendedBlock and LocatedBlock



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