Which OCI capability can protect against power failures within an Availability Domain?

Fault Domains are a critical capability within Oracle Cloud Infrastructure designed to mitigate the impact of failures, including power outages, within an Availability Domain. They provide a way to segregate your resources so that they are not all affected by a single point of failure. By placing different instances of your application across different fault domains within the same Availability Domain, you ensure that even if one fault domain experiences issues—such as power failure—other fault domains can continue to operate normally. This increases the resiliency of your applications.

In contrast, while other options like Backup Domains and High Availability Clusters provide different forms of data protection and application availability, they do not specifically address the issue of localized power failures within an Availability Domain. Redundancy Zones, while suggesting a similar concept to fault domains, are not a specific OCI capability and do not refer to the structured fault tolerance that fault domains provide. Thus, utilizing fault domains is a proactive approach to managing risks associated with physical infrastructure failures within OCI.