What does AWS SAM use to deploy Lambda functions?

AWS Serverless Application Model (SAM) utilizes AWS CodeDeploy to deploy Lambda functions efficiently. CodeDeploy is designed to automate application deployments, including those for serverless applications such as AWS Lambda. When using AWS SAM for application development and deployment, developers define their infrastructure as code in a SAM template. This template describes the Lambda functions, API Gateway, and other resources required for the application.

During the deployment process, CodeDeploy manages the lifecycle of the Lambda functions, ensuring that updates are applied smoothly. It provides capabilities like traffic shifting, canary deployments, and monitoring, which enhance the deployment process by reducing risks and downtime.

This use of CodeDeploy in concert with AWS SAM allows developers to easily manage version control and rollbacks for Lambda functions, making it a powerful combination for deploying serverless applications. While the other services mentioned play crucial roles in the AWS ecosystem, they do not directly pertain to the deployment mechanism specifically employed by AWS SAM for Lambda functions.