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https://issues.apache.org/jira/browse/HDFS-15747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jinglun reassigned HDFS-15747:
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Assignee: Jinglun
> RBF: Rename across sub-namespaces.
> ----------------------------------
>
> Key: HDFS-15747
> URL: https://issues.apache.org/jira/browse/HDFS-15747
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Jinglun
> Assignee: Jinglun
> Priority: Major
>
> Since we have HDFS-15294, we can use it to rename across namespaces. This
> Jira proposes a basic implementation: enable the Router to handle rename
> within multi-namespaces with the federation balance tool.
> If the conditions below are satisfied, the router will rename the path across
> namespaces:
> 1. The 'enable rename across namespaces' switch is on. Default is off.
> 2. The remote location of src and the dst should be exactly one and should
> at different namespaces.
> We can implement this in 2 steps:
> -1. Move hadoop-federation-balance module to hadoop-hdfs-rbf. That's because
> the implementation of federation balance depends on hadoop-hdfs-rbf and
> hadoop-distcp. To avoid circular dependency we can move
> hadoop-federation-balance to hadoop-hdfs-rbf and let hadoo-hdfs-rbf depend on
> hadoop-distcp.-
> 1. Move the router-related part from hadoop-federation-balance module to
> hadoop-hdfs-rbf module. So we can keep the hadoop-federation-balance module
> independent.
> 2. The basic implementation of rename across sub-namespaces. This step
> relies on step one.
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