[atodorov99]

2) III - Distributed commits aren't just hard they don't exist. Redis and your primary dB can never hold the same data - at most you can guarantee only for IMMUTABLE data that what is in DB is also in redis.

I've seen others and myself included try to sync them when solving some problems. Just because it is so natural to believe it possible to do. Then you find out you are running circles.

Honestly for the use cases I've met Redis has only made sense to be used as a cache for performance or message bus. Your primary data store is gonna give you the other guarantees of backups, consistency etc...

Unless somebody usew it as their primary store, but everybody chooses their own religion I guess.