Wei Yan commented on HDFS-13215:

That would need to rebuild the story of router configurations, like we may need 
to use hdfs-rbf-site.xml, instead of hdfs-site.xml one to avoid confusion.

Another option would be: using String to represent class like 
"DFS_ROUTER_METRICS_CLASS_DEFAULT = FederationRPCPerformanceMonitor.class", as 
I mentioned above. But I only saw two such cases in current DFSConfigKeys.java, 
and it requests careful maintain if code refactored...

I don't have other idea here..


> RBF: Move Router to its own module
> ----------------------------------
>                 Key: HDFS-13215
>                 URL: https://issues.apache.org/jira/browse/HDFS-13215
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Íñigo Goiri
>            Assignee: Wei Yan
>            Priority: Major
>         Attachments: HDFS-13215.000.patch
> We are splitting the HDFS client code base and potentially Router-based 
> Federation is also independent enough to be in its own package.

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