What is the MOST efficient way to accomplish this request?
Create an Amazon EC2 instance and schedule a cron to invoke the Lambda function.
Create a Repeat Time variable inside the Lambda function to invoke the Lamdba function.
Create a second Lambda function to monitor and invoke the first Lamdba function.
Create an Amazon CloudWatch scheduled event to invoke the Lambda function.
Explanations:
Using an EC2 instance for this task is inefficient as it requires managing infrastructure. Lambda functions are designed to be serverless, and an EC2 instance introduces unnecessary complexity and cost for this use case.
Lambda functions do not have an internal scheduler or “Repeat Time” variable. Scheduling tasks is typically done via external services like CloudWatch, not within the Lambda function itself.
Creating a second Lambda function to invoke the first is an unnecessary approach. CloudWatch can handle scheduling directly without needing a second function to trigger the first.
Amazon CloudWatch Events is the most efficient way to schedule Lambda functions. CloudWatch can trigger a Lambda function at regular intervals, such as every 15 minutes, without the need for any extra infrastructure.
I design that the answer is:
Create an Amazon CloudWatch scheduled event to invoke the Lambda function.