Noun
(cryptography) The notional space that contains all possible cryptographic keys.
(databases) A NoSQL object that includes column families.
Source: en.wiktionary.orgNOTE: For performance reasons, Redis does not actually sample from the entire keyspace, when using an LRU, TTL, or, as of Redis 4, LFU policy. Source: Internet
The next screenshot demonstrates creation of a keyspace in and listing the available keyspaces. Source: Internet