Redis ( Remote Dictionary Server) is an in-memory, NoSQL, open-source database that is used mainly for application cache.Redis stores data in Server Memory rather than Hard Drive, due to this reason Redis has very faster response time in performing read and write operations.
NoSQL stand for Not Only SQL provides more flexibility than traditional database.It does not use structured Query languages to query data.NoSQL encompasses structured data, semi structured data and unstructured data and polymorphic data.