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https://issues.apache.org/jira/browse/HDFS-11573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhouyingchao updated HDFS-11573:
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Attachment: HDFS-11573-2.6.5-001.patch
Since we implemented the feature on a 2.6 branch, it is easy to merge the code
with 2.6 branch. I upload the patch against 2.6.5 branch first. If necessary, I
can merge the code with the 3.0 branch in future.
> Support rename between different NameNodes in federated HDFS
> ------------------------------------------------------------
>
> Key: HDFS-11573
> URL: https://issues.apache.org/jira/browse/HDFS-11573
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: federation
> Reporter: zhouyingchao
> Attachments: HDFS-11573-2.6.5-001.patch, HDFS_federation_rename.pdf
>
>
> Federated file system can improve overall scalability by dividing a
> single namespace into multiple sub-namespaces. Since the divided
> sub-namespace are held by different namenodes, rename operation between those
> sub-namespace is forbidden. Due to this restriction, many applications have
> to be rewritten to work around the issue after migrated to federated file
> system. Supporting rename between different namenodes would make it much
> easier to migrate to federated file systems.
> We have finished a preliminary implementation of this feature in a 2.6
> branch. I'll upload a write-up regarding the design in a few days. And then
> I'll re-org the code against the trunk and upload the patch.
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