[jira] [Created] (CASSANDRA-12030) Range tombstones that are masked by row tombstones should not be written out

["Nachiket Patil (JIRA)" <ji...@apache.org>]

Nachiket Patil created CASSANDRA-12030:
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             Summary: Range tombstones that are masked by row tombstones should not be written out
                 Key: CASSANDRA-12030
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12030
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Nachiket Patil
            Assignee: Nachiket Patil
            Priority: Minor


During compaction, if a table has range tombstone and a row delete with higher timestamp than range tombstone, both are written out to disk. Some problems seen because of this behavior:
1. The Range tombstone is expensive to maintain.
2. Range queries see timeouts when there are too many range tombstones present which may be masked by row tombstones.
This can be avoided with simple optimization to not write out range tombstone if it is masked by row delete.




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