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https://issues.apache.org/jira/browse/HDFS-8845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14649808#comment-14649808
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Chang Li commented on HDFS-8845:
--------------------------------

Hi  [~eddyxu], thanks for comments.  It's intentionally done for performance by 
a little bit trade off. 

> DiskChecker should not traverse entire tree
> -------------------------------------------
>
>                 Key: HDFS-8845
>                 URL: https://issues.apache.org/jira/browse/HDFS-8845
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Chang Li
>            Assignee: Chang Li
>         Attachments: HDFS-8845.patch
>
>
> DiskChecker should not traverse entire tree because it's causing heavy disk 
> load on checkDiskError()



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