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https://issues.apache.org/jira/browse/HDFS-8193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14523570#comment-14523570
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Zhe Zhang commented on HDFS-8193:
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bq. Can you please talk about any other administrative mistakes that you are
targeting with this functionality?
Sorry forgot to address this question. One common admin mistake is simply
careless file deletion. The current HDFS Trash should protect this, but
empirically this is often noticed from sudden drop of block counts or total
space usage, which the admin team usually closely monitors (in contrast, file
count is typically less watched).
> 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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