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https://issues.apache.org/jira/browse/HADOOP-16140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16781849#comment-16781849
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Stephen O'Donnell commented on HADOOP-16140:
--------------------------------------------
Uploaded one more patch - this contains a note in the docs about the new
options and hopefully fixes the remaining checkstyle issues.
I think adding the ability to pass a filesystem to the expunge command is quite
easy as the Trash itself has the ability to accept a non-default FS when it is
created. The tricky part will be adding a test for it I think. I will add a
comment to HADOOP-13656 and see if the current assignee wants to work on it.
> 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: HADOOP-14200.002.patch, HADOOP-14200.003.patch,
> HADOOP-14200.004.patch, 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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