Command builders for Redis Cuckoo filter (CF.*) operations.

A Cuckoo filter is a probabilistic data structure similar to a Bloom filter but with two key advantages: it supports deletion of previously added items, and it can report approximate item counts. Like Bloom filters, Cuckoo filters may return false positives but never false negatives. The trade-off is slightly higher memory usage per element compared to Bloom filters.

All functions in this module are pure and return a command list (a list of strings) suitable for passing to Redis.command/2 or Redis.pipeline/2.

Examples

# Reserve a Cuckoo filter for up to 10_000 items
Redis.command(conn, Cuckoo.reserve("users", 10_000))

# Add, check, and delete an item
Redis.pipeline(conn, [
  Cuckoo.add("users", "alice"),
  Cuckoo.exists("users", "alice"),
  Cuckoo.del("users", "alice")
])