Oracle Cloud Infrastructure 2019 Developer Associate — Question 92

As the Cloud Architect for your company, you have been tasked with designing a high performance compute (HPC) cluster in Oracle Cloud Infrastructure (OCI).
The following requirements have been defined:
✑ The cluster must be a minimum of three nodes, but may increase to six nodes when demand requires.
✑ The cluster must be resilient to any potential infrastructure failures.
✑ To minimize latency, all nodes must be deployed within the same availability domain (AD).
✑ Adding or replacing nodes within the cluster should take no more than 30 minutes.
Which two steps should be performed to satisfy these requirements in OCI? (Choose two.)

Answer options

• A. Deploy the cluster in a single AD with a shared file system that leverages the file storage service (FSS). Deploy a standby cluster in another AD and configure it to use the same shared file system.
• B. Deploy the cluster in a single AD. Place each of the nodes in one of the three different fault domains in that AD.
• C. Create a backup of your HPC node compute instance boot volume. Launch new compute instances directly from the backup to reduce provisioning time.
• D. Create a custom image of your HPC node compute instance. Launch new compute instances using this image to reduce provisioning time.
• E. Deploy the cluster in a single AD. Place each of the nodes in a different virtual cloud network (VCN) subnet.

Correct answer: A, D

Explanation

Answer A is correct because deploying the cluster within a single AD with a shared file system ensures low latency and resilience through a standby cluster in another AD. Answer D is also correct as it allows for quick provisioning of new nodes using a custom image. The other options do not meet the requirements for resilience or fast deployment effectively.