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https://issues.apache.org/jira/browse/HDFS-12742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16226571#comment-16226571
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Weiwei Yang commented on HDFS-12742:
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Hi [~shashikant]
The case you described, we can list all volumes hosted by once KSM and simply
delete these volumes. My point is we don't need a brand new tool to handle
something can be addressed with existing API (with some small enhancement).
> Add support for KSM --expunge command
> -------------------------------------
>
> Key: HDFS-12742
> URL: https://issues.apache.org/jira/browse/HDFS-12742
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: HDFS-7240
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Fix For: HDFS-7240
>
> Attachments: HDFS-12742-HDFS-7240.001.patch,
> HDFS-12742-HDFS-7240.002.patch
>
>
> KSM --expunge will delete all the data from the data nodes for all the keys
> in the KSM db.
> User will have no control over the deletion.
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