A company is building a stock trading application in the AWS Cloud. The company requires a highly available solution that provides low-latency access to block storage across multiple Availability Zone

Question

Options

• AUse an Amazon S3 bucket and an S3 File Gateway as shared storage for the application.
• BCreate an Amazon EC2 instance in each Availability Zone. Attach a General Purpose SSD (gp3)
• CUse an Amazon FSx for NetApp ONTAP Multi-AZ file system to access data by using the iSCSI
• DCreate an Amazon EC2 instance in each Availability Zone. Attach a Provisioned IOPS SSD (io2)

• A
  3% (1)
• B
  10% (3)
• C
  84% (26)
• D
  3% (1)

Explanation

Amazon FSx for NetApp ONTAP supports Multi-AZ, providing automatic failover between Availability Zones for high availability. It exposes ONTAP LUNs over the iSCSI protocol, delivering shared block storage semantics with low latency and consistent performance to EC2 clients across AZs. This meets the requirement for "highly available" and "low-latency" block access across multiple AZs. S3/S3 File Gateway (A) is object/file, not block storage. EBS (B, D) provides block storage to a single instance in a single AZ; EBS volumes cannot be shared across instances/AZs, and host-side sync scripts add latency, complexity, and do not provide true HA. FSx for ONTAP natively provides synchronous HA pair replication, fast failover, and supports iSCSI multipathing for resilient, performant access suited to latency-sensitive trading workloads.

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