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https://issues.apache.org/jira/browse/HDFS-15087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17128539#comment-17128539
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Uma Maheswara Rao G commented on HDFS-15087:
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Hi [~LiJinglun] and All, great to see this work!
I have not went through the design doc or code yet, So, throwing some questions
on very high level: Is that snapshots mandatory for this feature to work?
If it's mandatory, would it be possible to think and make it as optional and
have alternative thoughts to get the diff?
If it's not mandatory, that's great. Can this be a generic rename function even
across different hadoop compatible file systems?
CC: [~weichiu]
> RBF: Balance/Rename across federation namespaces
> ------------------------------------------------
>
> Key: HDFS-15087
> URL: https://issues.apache.org/jira/browse/HDFS-15087
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Jinglun
> Assignee: Jinglun
> Priority: Major
> Attachments: HDFS-15087.initial.patch, HFR_Rename Across Federation
> Namespaces.pdf
>
>
> The Xiaomi storage team has developed a new feature called HFR(HDFS
> Federation Rename) that enables us to do balance/rename across federation
> namespaces. The idea is to first move the meta to the dst NameNode and then
> link all the replicas. It has been working in our largest production cluster
> for 2 months. We use it to balance the namespaces. It turns out HFR is fast
> and flexible. The detail could be found in the design doc.
> Looking forward to a lively discussion.
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