Amazon DAX (DynamoDB Accelerator) is a fully managed in-memory caching service for Amazon DynamoDB that helps improve read performance from milliseconds to microseconds — up to 10x faster for read-heavy applications
The SSM Agent is a lightweight software component that runs on your managed instances. It allows AWS Systems Manager to securely communicate with the instance and execute tasks
AWS Fargate is a serverless compute engine for containers that lets you run containers without managing servers or EC2 instances.
SSM agent is a software that has to be installed to servers either in on-prem or the EC2 instances to use the systems manager service of AWS
Eventually Consistent
Strongly Consistent