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https://issues.apache.org/jira/browse/HADOOP-16140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16776663#comment-16776663
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Adam Antal commented on HADOOP-16140:
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I wonder whether it would make sense to implement something like {{git clean
--dry-run}}: it does not remove anything, but shows you what the command would
have been done. I think this would be helpful for the user, though technically
do nothing else than just a {{dfs -ls}} on trash root. Maybe {{-emptyTrash}}
command and this extra option could wipe out the confusion about HDFS trash.
What is your opinion?
For your patch uploaded, please add some unit tests and CLI tests for the new
command.
> Add emptyTrash option to purge trash immediately
> ------------------------------------------------
>
> Key: HADOOP-16140
> URL: https://issues.apache.org/jira/browse/HADOOP-16140
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 3.3.0
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Priority: Major
> Attachments: HDFS-14200.001.patch
>
>
> I have always felt the HDFS trash is missing a simple way to empty the
> current users trash immediately. We have "expunge" but in my experience
> supporting clusters, end users find this confusing. When most end users run
> expunge, they really want to empty their trash immediately and get confused
> when expunge does not do this.
> This can result in users performing somewhat dangerous "skipTrash" operations
> on the trash to free up space. The alternative, which most users will not
> figure out on their own is:
> # Run the expunge command once - this will move the current folder to a
> checkpoint and remove any old checkpoints older than the retention interval
> # Wait over 1 minute and then run expunge again, overriding fs.trash.interval
> to 1 minute using the following command hadoop fs -Dfs.trash.interval=1
> -expunge.
> With this Jira I am proposing to add a extra command, "hdfs dfs -emptyTrash"
> that purges everything in the logged in users Trash directories immediately.
> How would the community feel about adding this new option? I will upload a
> patch for comments.
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