Which change will meet these requirements MOST cost-effectively?
Use S3 Event Notifications to write a message with image details to an Amazon Simple Queue Service (Amazon SQS) queue. Configure an AWS Lambda function to read the messages from the queue and to process the images.
Use S3 Event Notifications to write a message with image details to an Amazon Simple Queue Service (Amazon SQS) queue. Configure an EC2 Reserved Instance to read the messages from the queue and to process the images.
Use S3 Event Notifications to publish a message with image details to an Amazon Simple Notification Service (Amazon SNS) topic. Configure a container instance in Amazon Elastic Container Service (Amazon ECS) to subscribe to the topic and to process the images.
Use S3 Event Notifications to publish a message with image details to an Amazon Simple Notification Service (Amazon SNS) topic. Configure an AWS Elastic Beanstalk application to subscribe to the topic and to process the images.
Explanations:
This option leverages S3 Event Notifications to trigger an AWS Lambda function, which is a serverless compute service that scales automatically. Lambda can efficiently process images as they are uploaded, and with a processing time of 2 minutes and a memory requirement of 512 MB, it fits within Lambda’s limits. This solution is highly cost-effective as you only pay for the compute time used, eliminating the need for always-on infrastructure.
This option involves using an EC2 Reserved Instance to process images. While it can handle the workload, Reserved Instances require upfront payment and commitment, making it less cost-effective compared to Lambda, especially for variable workloads like image uploads. Additionally, EC2 instances require management and scaling, adding complexity and cost.
This option uses Amazon SNS to publish messages about uploaded images and then requires a container instance in Amazon ECS to process them. Although ECS can handle the processing, it incurs costs for running container instances continuously, which can be more expensive than a serverless solution like Lambda, especially for variable workloads. Additionally, it introduces management overhead compared to Lambda.
Similar to option C, this option uses Amazon SNS for notifications and requires an AWS Elastic Beanstalk application to process the images. Elastic Beanstalk is designed for web applications and requires more management and scaling than Lambda, making it less cost-effective for this use case. It also incurs additional costs for the underlying resources.
My best guess is:
Use S3 Event Notifications to write a message with image details to an Amazon Simple Queue Service (Amazon SQS) queue. Configure an AWS Lambda function to read the messages from the queue and to process the images.