Redis
Redis is an in-memory data structure store, released under open source BSD license. It is also referred to as Remote (Re) Dictionary (di) Server (s). It works on the principle of Key Value pair. Redis supports many different types of datasets such as lists, maps, sets, sorted sets, and so on.
It's in memory data that can also be made persisted on disk. It means that if, because of any reason, a Redis instance got rebooted, or if after recovering from a failure it comes back online, then it will restore all of its data from the disk and place it in memory as if nothing happened. This is what makes Redis utilized as a database.
It is super fast in performance because it runs in memory, due to which many people are using Redis for cache purpose in order to increase performance of their applications.
Redis has a publisher and subscriber module, which is also referred to as the Pub/Sub module. In this module, Publisher creates channels and the subscriber joins them. Now, whenever a publisher...
