Redis (Remote Dictionary Server) is a very popular and widely-used open source, fast, distributed and efficient in-memory key-value database/data structure server. It offers a rich set of features that make it effective for a wide range of use cases: as a database, caching layer, message broker, or queue; applicable in web applications, chat and messaging

Redis provides high availability via Redis Sentinel distributed system. Sentinel helps to monitor Redis instances, detect failures and will do roles switches automatically thus enabling a Redis deployment to resist any kind of failures. It features monitoring of Redis instances (master and replicas), supports notification of other services/processes or the system administrator via a script,

Redis Cluster is a builtin Redis feature that supports automatic sharding, replication and high availability which was previously implemented using Sentinels. It is designed for two major purposes: one is to automatically split your dataset among multiple instances and secondly to provide some degree of availability during partitions, to continue operations when some instances (especially