REmote DIctionary Server (Redis) is written by Salvatore Sanfilippo of key-value storage systems.
Redis is an open source use written in ANSI C, BSD comply with the agreement and support network, based on the persistence of memory can log type, Key-Value database, and provides multi-lingual API.
It is often called a data structure of the server, since the value (value) can be a string (String), Hash (the Hash), a list (List), set (sets), and an ordered collection (sorted sets) and other types.