iterate over existign keys

list keys matching glob

get random existing key (but not value)

test existence of a key

copy existing value to another key

move existing value to another key

... if target does not exist

delete a key

... with asynchronous memory reclaim

set relative key expiration time

... in milliseconds

set absolute key expiration time

... in milliseconds

get key expiration time

... in milliseconds

remove key expiration time

serialize value with checksum

... and restore serialized value

set last access time for eviction policies

get key type (string, list, hash, zset, set, stream)