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https://issues.apache.org/jira/browse/HDFS-4955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699439#comment-13699439
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Binglin Chang commented on HDFS-4955:
-------------------------------------
Sorry, I searched InodeID/fileID but not find that JIRA, thanks for correct
this!
> 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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