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https://issues.apache.org/jira/browse/HDFS-11203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17802525#comment-17802525
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Shilun Fan commented on HDFS-11203:
-----------------------------------
Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a
blocker. Retarget 3.5.0.
> Rename support during re-encrypt EDEK
> -------------------------------------
>
> Key: HDFS-11203
> URL: https://issues.apache.org/jira/browse/HDFS-11203
> Project: Hadoop HDFS
> Issue Type: Task
> Components: encryption
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Priority: Major
>
> Currently HDFS-10899 disables renames within the EZ if it's under
> re-encryption. (similar to current cross-zone rename checks).
> We'd like to support rename in the long run, so cluster is fully functioning
> during re-encryption.
> The reason rename is particularly difficult is:
> - We want to re-encrypt all files under an EZ in one pass, without missing any
> - We want to iterate through the files and keep track of where we are (i.e. a
> cursor), so in case of NN failover/crash, we can resume from fsimage/edits.
> - We cannot guarantee namespace is not changed during re-encryption. Newly
> created files automatically has new edek, deleted files we don't care. But if
> a file is renamed from behind the cursor to before, it may be missed in the
> re-encryption.
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