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From "Shashikant Banerjee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12742) Add support for KSM --expunge command
Date Tue, 26 Dec 2017 07:40:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16303610#comment-16303610
] 

Shashikant Banerjee commented on HDFS-12742:
--------------------------------------------

[~cheersyang], i think the better approach here would be to iterate through all the keys and
build the container list in KSM and send container deletion request to SCM to delete the containers
specific to the particular KSM instance directly at SCM instead of sending key deletion request.
What do you think?

Sorry for revisiting this issue after quite a while.

> 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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