From the Speedb Hive:
RocksDB and Speedb support “delete range” (one operation) the problem is that this is working in the background and may slow down scan. The way I would go is to use a CF for this table and delete & recreate this CF. I am not sure Kafka supports this …
You can find the Speedb hive here and (once you’ve registered) the link to the thread with your question here, if you have more questions or need additional info