Paulo Motta created CASSANDRA-17372:
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Summary: Dynamic Table TTL
Key: CASSANDRA-17372
URL: https://issues.apache.org/jira/browse/CASSANDRA-17372
Project: Cassandra
Issue Type: Improvement
Components: CQL/Semantics
Reporter: Paulo Motta
One limitation of the {{default_time_to_live}} option is that it only applies
to newly inserted data so an expensive migration is required when altering the
table-level TTL, which is not an uncommon request due to changes in retention
policies.
This seems to have been a deliberate design decision when adding the Table TTL
feature on CASSANDRA-3974, due to the reasons stated [on this
comment|https://issues.apache.org/jira/browse/CASSANDRA-3974?focusedCommentId=13427314&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-13427314]
so we should revisit and potentially address these concerns.
I would like to explore supporting dynamic TTL, which would reflect any updates
to the table-level {{default_time_to_live}} immediately to all table data.
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