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https://issues.apache.org/jira/browse/HDFS-9005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhe Zhang reopened HDFS-9005:
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> Provide configuration support for upgrade domain
> ------------------------------------------------
>
> Key: HDFS-9005
> URL: https://issues.apache.org/jira/browse/HDFS-9005
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Ming Ma
> Assignee: Ming Ma
> Fix For: 2.9.0, 3.0.0-alpha1
>
> Attachments: HDFS-9005-2.patch, HDFS-9005-3.patch, HDFS-9005-4.patch,
> HDFS-9005.branch-2.8.001.patch, HDFS-9005.patch
>
>
> As part of the upgrade domain feature, we need to provide a mechanism to
> specify upgrade domain for each datanode. One way to accomplish that is to
> allow admins specify an upgrade domain script that takes DN ip or hostname as
> input and return the upgrade domain. Then namenode will use it at run time to
> set {{DatanodeInfo}}'s upgrade domain string. The configuration can be
> something like:
> {noformat}
> <property>
> <name>dfs.namenode.upgrade.domain.script.file.name</name>
> <value>/etc/hadoop/conf/upgrade-domain.sh</value>
> </property>
> {noformat}
> just like topology script,
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