A well-architected event-driven application uses a combination of AWS services and custom code to process and manage requests and data. This chapter focuses on Lambda-specific topics in application design, and how Lambda interacts with those services. There are many important considerations for serverless architects when designing applications for busy production systems.

Topics

• Understanding quotas
• Scaling and concurrency in Lambda
• Choosing and managing runtimes in Lambda functions
• Networking and VPC configurations
• Comparing Lambda invocation modes
• Controlling traffic flow for server-based resources
• Frequently asked questions

This chapter covers:

• Understanding how to work with Service Quotas, when to request increases, and architecting with quotas in mind.
• Scaling and concurrency and the different behaviors of on-demand and Provisioned Concurrency.
• Choosing and managing runtimes in Lambda functions.
• Networking, different modes of Lambda invocations, and working with downstream server-based resources.