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https://issues.apache.org/jira/browse/CASSANDRA-13019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17006592#comment-17006592
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Jeremy Hanna commented on CASSANDRA-13019:
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I like the idea to reduce the effect on the regular server operations when
performing the snapshot, especially if there is a coordinated snapshot across
the cluster.
Because it may affect time it takes for operations that call `snapshot`
indirectly, should we make a note of this in the NEWS.txt - both the
availability of the throttle and that it may affect time to run things like
`truncate` and `drop`?
> Improve clearsnapshot 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: Jeff Jirsa
> Priority: Normal
> Labels: pull-request-available
> Fix For: 4.x
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> 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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