CF.EXISTS key item

Available in: Redis Stack

Time complexity: O(k), where k is the number of sub-filters

Check if an item exists in a Cuckoo Filter key


  • key: The name of the filter
  • item: The item to check for


Integer reply - where "1" value means the item may exist in the filter, and a "0" value means it does not exist in the filter.


redis> CF.EXISTS cf item1
(integer) 1
redis> CF.EXISTS cf item_new
(integer) 0