Edward Capriolo created CASSANDRA-4565:
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Summary: TTL columns with older then gcgrace do not need to flush
Key: CASSANDRA-4565
URL: https://issues.apache.org/jira/browse/CASSANDRA-4565
Project: Cassandra
Issue Type: Improvement
Reporter: Edward Capriolo
Assignee: Edward Capriolo
With memcache many people are willing to sacrifice durability for performance.
Cassandra has a TimeToLive feature that can be used in caching scenarios with
low values for gc_grace_seconds. However from a code dive it seems that
cassandra will always write TTL to disk, even those that are beyond
gc_grace_seconds. If a user very large memtables,small ttl, and low gc_grace it
is possible that writing memtables can be skipped entirely in some scenarios.
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