This is a summary post of all Redis related posts I've been writing over the last 2 months.
Redis - An Alternative (to) Cache - Part I
Introduction of what is Redis and Redis data types
Redis - An Alternative (to) Cache - Part II
Introduction of how SDL Web 8.5 uses Redis and Redis Client Tools. You should be able to get started by now
Putting Redis to Production - Part I - Security
Security considerations when putting Redis on Production
Putting Redis to Production - Part II - Availability
How to achieve high availability when putting Redis on Production
Putting Redis to Production - Part III - Redis in Cloud
Overview of the Redis Cloud offerings and some details on Amazon ElastiCache
Each topic has a lot more details, but the above posts are my real learning process and most of them are before and not related to SDL Web 8.5. It has been working well to me, so hope it is somehow useful to the community.