Which AWS service is ideal for throughput and transaction-intensive workloads?

Amazon Elastic Block Store (EBS) is designed to support throughput and transaction-intensive workloads effectively. It provides block-level storage that can be attached to Amazon EC2 instances, allowing for high-performance read and write operations. EBS is particularly suitable for applications that require consistent and low-latency access to data, such as databases and transaction processing systems.

The service offers various types of volumes optimized for performance, including SSD-backed volumes that deliver high IOPS (Input/Output Operations Per Second) and throughput capabilities. This makes it ideal for workloads that involve heavy data processing, as it ensures that multiple transactions can be handled simultaneously without bottlenecks, thus maintaining efficiency and responsiveness.

In contrast, other services listed, such as Amazon S3, are primarily object storage solutions and may not provide the necessary low-latency access required for transaction-intensive applications. Amazon EC2 Auto Scaling is focused on managing the number of EC2 instances in response to demand, while Amazon CloudFront is meant for content delivery through caching and acceleration, which does not directly address the throughput needs of transaction-heavy workloads.