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https://issues.apache.org/jira/browse/HDFS-4955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699484#comment-13699484
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Suresh Srinivas commented on HDFS-4955:
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[~decster] If you want to take up HDFS-4667 and work on it, feel free. I,
[~szetszwo] or [~jingzhao] can help with any questions you may have about
Snapshots internals.
> Use InodeID to improve snapshot diff
> ------------------------------------
>
> Key: HDFS-4955
> URL: https://issues.apache.org/jira/browse/HDFS-4955
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Binglin Chang
>
> Currently snapshot diff doesn't handle file/dir rename very well, so distcp
> can't do minimal data transfer in incremental backup. Using InodeID can
> uniquely identify a file, and can help diff search algorithm.
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