At AWS re:Invent 2023, ElastiCache Serverless was announced. This continues the trend of databases offering a serverless service, so understandably, there is excitement from both the Redis and serverless communities. It’s not surprising that in-memory data stores are the last ones to go serverless. Creating a true serverless experience for sub-millisecond data stores is extremely complicated, as data must remain in memory even when there is no traffic at all.

So, how did AWS pull it off? How did they create a serverless offering for a service that must remain up at all times? And which use cases is ElastiCache Serverless a good fit for? The answer to those questions can be found in the service pricing model.

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