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https://issues.apache.org/jira/browse/HDFS-7014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162542#comment-14162542
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Haohui Mai commented on HDFS-7014:
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bq. I'd prefer to avoid the layer of indirection if possible. It's bad for
performance.
Agree. I think some clean ups would definitely beneficial.
bq. Can you clarify what you mean by "the writing logic of Hadoop v1"? It seems
to include all the "BlockConstructionStage" stuff that Hadoop 2 had, as well as
pipeline recovery.
I'm under the impression that the current patch does not support writing to
Hadoop v2, maybe I misunderstood the patch then.
> 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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