Yeah, this sort of thing is like a pessimistic case for Cassandra and various databases that are designed to model data as an immutable set of facts and to model deletions as retractions or the like.
Apparently it defaults to 10 days for tombstone purging and recommends not going below 5 days. How bad is performance actually going to be at a nice slow several-day compaction rate?
The pessimistic case sounds like trying to remove things within hours.
