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https://issues.apache.org/jira/browse/CASSANDRA-13019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16969715#comment-16969715
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maxwellguo commented on CASSANDRA-13019:
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Hi [~jjirsa], I am glad to review your patch . For this patch , I just throttle 
the delete of the snapshot . I think your patch for snapshot (make snapshot 
/clearsnapshot) are more comprehensive.  


> Improve clearsnapshot command to delete the snapshot files slowly.
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-13019
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13019
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Legacy/Core
>            Reporter: Dikang Gu
>            Assignee: maxwellguo
>            Priority: Normal
>             Fix For: 4.x
>
>
> In our environment, we are creating snapshots for backup, after we finish the 
> backup, we are running {{clearsnapshot}} to delete the snapshot files. At 
> that time we may have thousands of files to delete, and it's causing sudden 
> disk usage spike. As a result, we are experiencing a spike of drop messages 
> from Cassandra.
> I think we should implement something like {{slowrm}} to delete the snapshot 
> files slowly, avoid the sudden disk usage spike.



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