It is a fully managed, open-source, compatible in-memory data store to power fast and scalable applications.
In Microsoft Azure, Redis databases refer to instances of the Redis in-memory data store service that is offered as a managed service on the Azure platform. Redis is an open-source, in-memory data structure store that can be used as a cache, message broker, and for various other data storage and retrieval scenarios.
In Azure, you can use Azure Cache for Redis to deploy and manage Redis databases. Azure Cache for Redis provides a highly available and scalable Redis service, with features such as data persistence, backup and restore, clustering, and more. It is commonly used for improving the performance and scalability of applications by caching frequently accessed data in-memory.
So, in summary, Redis databases in the context of Microsoft Azure typically refer to instances of the Azure Cache for Redis service, which is a managed Redis solution provided by Azure.