Introduction to AWS Lambda

Learn about AWS Lambda serverless computing - from functions and triggers to execution roles and best practices.

lambda-function.js
exports.handler =
async (event) => {
return "Hello Lambda";
};
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Tutor:AWS Lambda is a serverless compute service that runs your code in response to events. You upload your code, and Lambda handles all the infrastructure management. You only pay for the compute time you consume.


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Concept 1: Lambda Basics

AWS Lambda is a serverless compute service that runs your code in response to events. You upload your code, and Lambda handles all the infrastructure management. You only pay for the compute time you consume.

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Introduction to AWS Lambda

Author

Pascual Vila

Cloud Instructor.

AWS Lambda is a serverless compute service that runs your code in response to events. You upload your code, and Lambda handles all the infrastructure management. You only pay for the compute time you consume.

What is Serverless?

Serverless means you don't manage servers. Lambda automatically scales your functions and handles infrastructure. You only pay for the compute time consumed - there's no charge when your code isn't running.

Lambda Triggers

Lambda functions can be triggered by various AWS services: API Gateway for HTTP requests, S3 for object events, DynamoDB for database changes, SNS for notifications, SQS for messages, and CloudWatch Events for scheduled tasks.

Benefits of Lambda

Lambda provides automatic scaling, no server management, pay-per-use pricing, and support for multiple programming languages. It's ideal for event-driven architectures and microservices.

Lambda Glossary

AWS Lambda
A serverless compute service that runs code in response to events. You upload code, and Lambda handles infrastructure management.
Serverless
A computing model where you don't manage servers. The cloud provider handles infrastructure, and you only pay for compute time consumed.
Lambda Function
A piece of code that runs in response to events. Functions are stateless and can be triggered by various AWS services.
Execution Role
An IAM role that a Lambda function assumes when it runs. The function uses this role's permissions to access AWS services. No credentials are stored in the function code.
Lambda Layer
A way to package libraries and dependencies separately from function code. Layers reduce deployment package size and enable code sharing across functions.
Cold Start
The delay when Lambda initializes a new execution environment for a function. This happens when a function hasn't been invoked recently or when scaling to handle increased load.