What are AWS Lambda layers and how do they handle dependencies?

What are AWS Lambda layers and how do they help with dependencies?

AWS Lambda layers are a way to package and share code and dependencies across multiple Lambda functions. They allow you to manage libraries and other dependencies separately from your function code.

Can you explain how to create a Lambda layer?

To create a Lambda layer, you need to package your dependencies in a .zip file, upload it to AWS Lambda, and then specify the layer when you create or update your Lambda function.

What are some common use cases for Lambda layers?

Common use cases include sharing libraries like AWS SDKs, custom runtimes, or even configuration files that multiple functions can use.

How do layers affect the deployment size of my Lambda function?

Using layers can reduce the deployment size of your Lambda function code, as the dependencies are stored separately and can be reused across functions.