SAA-C03 Q247 · Storage

Question

A company runs a Windows-based ecommerce application on Amazon EC2 instances. The application has a very high transaction rate. The company requires a durable storage solution that can deliver 200,000 IOPS for each EC2 instance. Which solution will meet these requirements?

Accepted Answer

**Answer A: EC2 instances with Provisioned IOPS SSD (io2) Block Express EBS volumes**

Let's map each requirement to the solution:

1. **200,000 IOPS per instance**: io2 Block Express volumes support up to **256,000 IOPS per volume**, making 200,000 IOPS achievable with a single volume. Standard io2 (non-Block Express) maxes out at 64,000 IOPS — which would NOT meet the requirement. Block Express is the critical differentiator.

2. **Durable storage**: Amazon EBS provides built-in durability with data replicated within the Availability Zone. io2 volumes specifically offer **99.999% durability** (5 nines), which is 10x better than standard gp3/io1 volumes (99.8%-99.9%). This is the most durable EBS volume type.

3. **Windows-based application**: EBS volumes are fully compatible with Windows

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