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https://issues.apache.org/jira/browse/CASSANDRA-6280?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-6280.
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Resolution: Not A Problem
look at {{auto_snapshot}} in cassandra.yaml
> Snapshots for dropped column families management
> ------------------------------------------------
>
> Key: CASSANDRA-6280
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6280
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Stephen Johnson
> Priority: Minor
>
> Currently the only option for removing snapshots of dropped column families
> is to delete them manually from the file system. We have a user that creates
> column families dynamically and deletes them when they are no longer needed.
> The result is snapshots of these tables build up quickly and disk space can
> only be reclaimed when they are manually deleted.
> A potential solution for this might be to add a flag to the nodetool
> clearsnaphot command that removes snapshots that no longer exist in the
> keyspace because they have been dropped.
> Another possibility might be to add a flag on cql delete query that ignores
> the auto_snapshot in the cassandra.yaml and does not create a snapshot for
> the deleted column family or keyspace.
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