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https://issues.apache.org/jira/browse/HDFS-8193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505449#comment-14505449
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Zhe Zhang commented on HDFS-8193:
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Thanks for the pointers Chris! A mock-up is a very good idea; HDFS-5986 and
HDFS-6385 are good examples to follow.
> Add the ability to delay replica deletion for a period of time
> --------------------------------------------------------------
>
> Key: HDFS-8193
> URL: https://issues.apache.org/jira/browse/HDFS-8193
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: namenode
> Affects Versions: 2.7.0
> Reporter: Aaron T. Myers
> Assignee: Zhe Zhang
>
> When doing maintenance on an HDFS cluster, users may be concerned about the
> possibility of administrative mistakes or software bugs deleting replicas of
> blocks that cannot easily be restored. It would be handy if HDFS could be
> made to optionally not delete any replicas for a configurable period of time.
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