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https://issues.apache.org/jira/browse/HDDS-4370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17259046#comment-17259046
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Arpit Agarwal commented on HDDS-4370:
-------------------------------------

Right now we don't have support to merge/cleanup small containers so I think it 
is okay to keep the deleted key info around. The total metadata should be 
pretty tiny.

> Datanode deletion service can avoid storing deleted blocks
> ----------------------------------------------------------
>
>                 Key: HDDS-4370
>                 URL: https://issues.apache.org/jira/browse/HDDS-4370
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>          Components: Ozone Datanode
>            Reporter: Lokesh Jain
>            Assignee: Aryan Gupta
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.1.0
>
>
> Currently BlockDeletingService in datanode processes the blocks to be deleted 
> and then stores them in a deleted blocks table. We can avoid storing deleted 
> blocks in the container rocksDB.



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