Can I setup a TTL on my data?

Yes, you can set up a TTL by going into CQLSH or Studio and running the following: 

• Insert data into the table cycling.calendar and use the USING TTL clause to set the expiration period to 86400 seconds.

  INSERT INTO cycling.calendar (race_id, race_name, race_start_date, race_end_date) VALUES (200, 'placeholder','2015-05-27', '2015-05-27') USING TTL 86400;

• Issue a SELECT statement to determine how much longer the data has to live.

  SELECT TTL (race_name) from cycling.calendar WHERE race_id = 200;

  

  If you repeat this step after some time, the time-to-live value will decrease.

• The time-to-live value can also be updated with the USING TTL keywords in an UPDATE command.

  UPDATE cycling.calendar USING TTL 300 SET race_name = 'dummy' WHERE race_id = 200 AND race_start_date = '2015-05-27' AND race_end_date = '2015-05-27';