Sylvain Lebresne created CASSANDRA-4671: -------------------------------------------
Summary: Improve removal of gcable tomstones during minor compaction Key: CASSANDRA-4671 URL: https://issues.apache.org/jira/browse/CASSANDRA-4671 Project: Cassandra Issue Type: Improvement Reporter: Sylvain Lebresne Priority: Minor When we minor compact, we only purge a row if we know it's not present in any of the sstables that are not in the compaction set. It is however possible to have scenario where this leads us to keep irrelevant tombstone for longer than necessary (and I suspect LCS make those scenario a little bit more likely). We could however purge tombstone if we know that the non-compacted sstables doesn't have any info that is older than the tombstones we're about to purge (since then we know that the tombstones we'll consider can't delete data in non compacted sstables). In other words, we should force CompactionController.shouldPurge() to return true if min_timestamp(non-compacted-overlapping-sstables) > max_timestamp(compacted-sstables). This does require us to record the min timestamp of an sstable first though (we only record the max timestamp so far). -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira