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https://issues-test.apache.org/jira/browse/HDFS-11035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090130#comment-16090130
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Ming Ma commented on HDFS-11035:
--------------------------------
Given these features are related to existing concepts such as decommission and
block placement, we can include description of these features in relevant
sections of existing *.md files.
> Better documentation for maintenace mode and upgrade domain
> -----------------------------------------------------------
>
> Key: HDFS-11035
> URL: https://issues-test.apache.org/jira/browse/HDFS-11035
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, documentation
> Affects Versions: 2.9.0
> Reporter: Wei-Chiu Chuang
>
> HDFS-7541 added upgrade domain and HDFS-7877 added maintenance mode. Existing
> documentation about these two features are scarce and the implementation have
> evolved from the original design doc. Looking at code and Javadoc and I still
> don't quite get how I can get datanodes into maintenance mode/ set up a
> upgrade domain.
> File this jira to propose that we write an up-to-date description of these
> two features.
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