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https://issues.apache.org/jira/browse/HDFS-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15023341#comment-15023341
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Xiaobing Zhou commented on HDFS-9420:
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Looks good as overall. Should the collection manipulation be thread safe?
Although it's used in the context of command line, the add-on unit tests
probably run them in multi-threaded scenarios.
> DiskBalancer : Add DataModels
> -----------------------------
>
> Key: HDFS-9420
> URL: https://issues.apache.org/jira/browse/HDFS-9420
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: HDFS
> Affects Versions: 2.8.0
> Reporter: Anu Engineer
> Assignee: Anu Engineer
> Attachments: HDFS-9420.001.patch, HDFS-9420.002.patch
>
>
> Adds Data Model classes needed for Disk Balancer. These classes allow us to
> persist the physical model of the cluster. This is needed by the other parts
> of Disk balancer like Planner and Executor engine
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