[jira] [Updated] (HDFS-12390) Supporting DNS to switch mapping

[Jiandan Yang (JIRA)]

     [ 
https://issues.apache.org/jira/browse/HDFS-12390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jiandan Yang  updated HDFS-12390:
---------------------------------
    Attachment: HDFS-12390-branch-2.8.2.001.patch

> Supporting DNS to switch mapping
> --------------------------------
>
>                 Key: HDFS-12390
>                 URL: https://issues.apache.org/jira/browse/HDFS-12390
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs, hdfs-client
>            Reporter: Jiandan Yang 
>            Assignee: Jiandan Yang 
>             Fix For: 2.8.2
>
>         Attachments: HDFS-12390-branch-2.8.2.001.patch
>
>
> As described in 
> [HDFS-12200|https://issues.apache.org/jira/browse/HDFS-12200], 
> ScriptBasedMapping may lead to NN cpu 100%. ScriptBasedMapping run 
> sub_processor to get rack info of DN/Client, so we think  it's a little 
> heavy.  We prepare to use TableMapping，but  TableMapping does not support 
> refresh and can not reload rack info of newly added DataNodes.
> So we implement it.



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