Oracle Cloud Infrastructure 2019 Developer Associate — Question 130

You are tasked with creating a highly available clustered application on Oracle Cloud Infrastructure consisting of three nodes. The round-trip latency between nodes must be less than 500µs (micro-seconds) and your cluster should be resilient to hardware failure.
What is the recommended deployment strategy?

Answer options

• A. Deploy the cluster nodes in a single region and deploy each node into a different AD. Select the same fault domain in each AD to ensure consistency.
• B. Deploy the cluster nodes in two separate regions and take advantage of multiple availability domains (ADs) in each region.
• C. Deploy the cluster nodes in a single region and deploy each node into a different AD.
• D. Deploy the cluster nodes in a single region and deploy each node in different fault domains within a single AD.

Correct answer: D

Explanation

The correct answer is D because deploying each node in different fault domains within a single AD ensures low latency and resilience to hardware failure. Option A is incorrect as using the same fault domain across different ADs does not provide the required isolation for high availability. Option B is not suitable because deploying across two regions introduces higher latency, which does not meet the requirement. Option C fails to ensure hardware resilience since all nodes would still be susceptible to failure in the same AD.