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https://issues.apache.org/jira/browse/HDFS-6261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16899913#comment-16899913
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Lars Francke commented on HDFS-6261:
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It's a pity that this was never committed. I think it's still relevant.
> Document for enabling node group layer in HDFS
> ----------------------------------------------
>
> Key: HDFS-6261
> URL: https://issues.apache.org/jira/browse/HDFS-6261
> Project: Hadoop HDFS
> Issue Type: Task
> Components: documentation
> Reporter: Wenwu Peng
> Assignee: Binglin Chang
> Priority: Major
> Labels: documentation
> Attachments: 2-layer-topology.png, 3-layer-topology.png,
> 3layer-topology.png, 4layer-topology.png, HDFS-6261.004.patch,
> HDFS-6261.005.patch, HDFS-6261.006.patch, HDFS-6261.007.patch,
> HDFS-6261.008.patch, HDFS-6261.009.patch, HDFS-6261.010.patch,
> HDFS-6261.v1.patch, HDFS-6261.v1.patch, HDFS-6261.v2.patch, HDFS-6261.v3.patch
>
>
> Most of patches from Umbrella JIRA HADOOP-8468 have committed, However there
> is no site to introduce NodeGroup-aware(HADOOP Virtualization Extensisons)
> and how to do configuration. so we need to doc it.
> 1. Doc NodeGroup-aware relate in http://hadoop.apache.org/docs/current
> 2. Doc NodeGroup-aware properties in core-default.xml.
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