Code Library

Redis is an open source, in-memory data structure store often used as a cache, database, or message broker. Azure Redis Cache is based on the popular open source Redis. The difference is that Azure manages Redis for you, saving you the trouble of spinning up a VM and installing and managing Redis yourself while still giving you a secure and dedicated Redis cache that can be accessed from any application within Azure. You can provision a Redis cache using the Azure portal.

Azure Redis Cache is available in three tiers:
 Basic This tier provides one node in multiple sizes. This tier is ideal for dev/test scenarios, and it has no service level agreement (SLA).

 Standard This tier provides resources for a replicated cache on two nodes in a primary/secondary configuration managed by Microsoft. This tier has a high availability SLA.

 Premium This tier includes everything in the Standard tier plus better performance, enhanced security, the ability to handle bigger workloads, and disaster recovery. Additional features include the following:

 You can use Redis persistence to persist data stored in the Redis cache. You can also take snapshots and back up the data (which can be reloaded later in case of failure).

 You can use Redis cluster to shard data across multiple Redis nodes, creating workloads of bigger memory sizes for better performance.

 You can deploy your Redis cache in a VNet, providing enhanced security and isolation for your Redis cache, as well as subnets, access control policies, and so on.

Source of Information : Microsoft Azure Essentials Fundamentals of Azure Second Edition