11_Serverless

Question 1

What is Lambda

AWS Lambda is a compute service where you can upload your code and create a Lambda function. AWS Lambda takes care of provisioning and managing the servers that you use to run the code. You don’t have to worry about operating systems, patching, scaling, etc.

Question 2

You can use Lambda in the following ways:

• As an event-driven compute service where AWS Lambda runs your code in response to events. These events could be changes to data in an Amazon S3 bucket or an Amazon DynamoDB table.
• As a compute service to run your code in response to HTTP requests using Amazon API Gateway or API calls made using AWS SDKs.

Question 3

Lambda

• Lambda scales out (not up) automatically
• Lambda functions are independent: 1 event = 1 function
• Lambda is serverless
• Lambda functions can trigger other Lambda functions, 1 event can = x functions if functions trigger other functions
• Architecture 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.