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https://issues.apache.org/jira/browse/HDFS-13347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16428630#comment-16428630
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Wei-Chiu Chuang commented on HDFS-13347:
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Next time, please make sure to link HDFS-13364 in this ijra.

Thanks guys!

> RBF: Cache datanode reports
> ---------------------------
>
>                 Key: HDFS-13347
>                 URL: https://issues.apache.org/jira/browse/HDFS-13347
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0
>            Reporter: Íñigo Goiri
>            Assignee: Íñigo Goiri
>            Priority: Minor
>             Fix For: 3.1.0, 2.10.0, 2.9.1, 3.0.3
>
>         Attachments: HDFS-13347-branch-2.000.patch, HDFS-13347.000.patch, 
> HDFS-13347.001.patch, HDFS-13347.002.patch, HDFS-13347.003.patch, 
> HDFS-13347.004.patch, HDFS-13347.005.patch, HDFS-13347.006.patch
>
>
> Getting the datanode reports is an expensive operation and can be executed 
> very frequently by the UI and watchdogs. We should cache this information.



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