I'm trying to understand the reasoning behind this stanza in Time Windowed Compaction Strategy's init: https://github.com/apache/cassandra/blob/cassandra-3.0.15/src/java/org/apache/cassandra/db/compaction/TimeWindowCompactionStrategy.java#L63-L69
Reposted (and slightly reformatted) here for convenience: if ( !options.containsKey(AbstractCompactionStrategy.TOMBSTONE_COMPACTION_INTERVAL_OPTION) && !options.containsKey(AbstractCompactionStrategy.TOMBSTONE_THRESHOLD_OPTION) ) { disableTombstoneCompactions = true; logger.debug("Disabling tombstone compactions for TWCS"); } else logger.debug("Enabling tombstone compactions for TWCS"); If you have left both tombstone compaction interval, and tombstone threshold at default values, you are *opting out* of tombstone compactions? This was certainly a surprising side effect to us, as we expected unset values to have the same exact effect as setting those values to their defaults. I'm wondering if someone can shed some more light on this, or if this should be considered a bug (it seems really intentional).