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https://issues.apache.org/jira/browse/CASSANDRA-3974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226772#comment-13226772
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Jonathan Ellis commented on CASSANDRA-3974:
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It would have to be min(cf ttl, column ttl) to be useful.
> Per-CF TTL
> ----------
>
> Key: CASSANDRA-3974
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3974
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Jonathan Ellis
> Priority: Minor
>
> Per-CF TTL would allow compaction optimizations ("drop an entire sstable's
> worth of expired data") that we can't do with per-column.
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