Oracle Cloud Infrastructure 2020 Architect Professional — Question 33

An online registration system is currently hosted on one large Oracle Cloud Infrastructure (OCI) Bare metal compute instance with attached block volumes to store all of the users' data. The registration system accepts the information from the user, including documents and photos and then performs automated verification and processing to check is the user is eligible for registration.
The registration system becomes unavailable at times, when there is a surge of users using the system. The existing architecture needs improvement as it takes a long time for the system to complete the processing and the attached block volumes are not large enough to store the ever growing data being uploaded by the users.
Which is the most effective option to achieve a highly scalable solution? (Choose the best answer.)

Answer options

• A. Upgrade your architecture to use a pool of Bare metal servers and configure them to use their local SSDs for faster data access. Set up Oracle Streaming Service (OSS) to distribute the tasks to the pool of Bare metal instances with Auto Scaling to dynamically increase or decrease the pool of compute instances depending on the length of the Streaming queue.
• B. Change your architecture to use an OCI Object Storage standard tier bucket; replace the single bare metal instance with an Oracle Streaming Service (OSS) to ingest the incoming requests and distribute the tasks to a group of compute instances with Auto Scaling.
• C. Attach more Block volumes as the data volume increases, use Oracle Notification Service (ONS) to distribute tasks to a pool of compute instances working in parallel, and Auto Scaling to dynamically size the pool of instances depending on the number of notifications received from the Notification Service. Use Resource Manager stacks to replicate your architecture to another region.
• D. Upgrade your architecture to use more Block volumes as the data volume increases. Replace the single bare metal instance with a group of compute instances with Auto Scaling to dynamically increase or decrease the compute instance pools depending on the traffic.

Correct answer: D

Explanation

Option D is correct because it ensures scalability by replacing the single bare metal instance with multiple compute instances that can dynamically adjust based on traffic, thus handling surges more effectively. The other options either do not provide a scalable architecture or incorporate unnecessary components that complicate the solution without addressing the core issue of scaling effectively to meet demand.