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Serverless

Lambda

Compute service to upload and run your code
AWS Lambda takes care of provisioning and managing the underlying infrastructure
Lambda scales out (not up) automatically
Usage
- Event-driven compute service which runs code in response to events. Events could be internal AWS events.
- Compute service to run your code in response to HTTP requests using AWS API Gateway or API calls made using AWS SDKs.
Lambda functions are independent, 1 event = 1 function
Lambda is serverless
Lambda functions can trigger other lambda functions, 1 event can trigger multiple functions
Architectures can get extremely complicated, AWS X-ray allows you to debug what is happening
Lambda can do things globally, you can use it to back up S3 buckets to other S3 buckets, etc
Lambda is cost effective
No servers, no maintenance is required

Number of Requests
Duration
(from the time your code begins executing until it returns or otherwise terminates, rounded up to the nearest 100ms)