AWS Lambda

AWS Lambda in a nutshell

Step 1: A trigger (like an HTTP request, S3 event, or database update) invokes the AWS Lambda function.

Step 2: The Lambda function retrieves and processes input data from the event trigger.

Step 3: The function initializes and executes the custom code provided by the user.

Step 4: AWS Lambda automatically scales based on the incoming request rate, ensuring seamless performance.

Step 5: The function can interact with other AWS services (e.g., DynamoDB, S3) to perform tasks like reading/writing data.

Step 6: Lambda handles retries if errors occur during execution or external service calls.

Step 7: AWS Lambda manages security, including encryption and identity access management (IAM).

Step 8: Logs and metrics are automatically captured and sent to Amazon CloudWatch for monitoring and troubleshooting.

Step 9: Lambda can cache results using Amazon ElastiCache for repeated requests, optimizing performance.

Step 10: Once execution is complete, the function returns the result to the caller or invokes another service, ending the process.