I need to write some endpoint that simulate the response of third party server to run performance test regularly. I have decided to go with API Gateway to Step Function (waits 2 seconds) to Lambda that returns response based on the request. This needs to be done to emulate latency of 2 seconds on third party service. The question is what would be the cheapest solution to solve the task using these services.
Should I go only with Lambda alone (no Step Functions and even API Gateway)? If I use only Lambda we would need many concurrent Lambdas each running for 2 seconds. What is the cheapest solution?
CodePudding user response：
When working with AWS services and trying to work out pricing, you should use the AWS Price Calculator. Each service also has pricing breakdowns:
Here's a quick work-up I did:
| Service | Price | Request/day | Notes |
|---|---|---|---|
| Lambda | $32/mo | 10k | 5 second runtime |
| Step Function | $76/mo | 10k | n/a |
From these numbers, the most cost effective solution would be to remove the Step Functions from the orchestration and just go with Lambdas.
A nice addition of using Lambdas are the ability to pass in a parameter to specify the 3rd party end-point latency. Or even a range or latency, i.e., random delay between 1 second and 3 seconds.
You can review this estimate here.
CodePudding user response：
Consider a SQS Delay Queue in front of the Lambda to simulate the 2 second latency. The first million SQS messages are always free each month, the next million cost $0.40.
Your Lambdas will execute without any artificial delay, reducing your compute cost by (more than?) half.