Which two protections do OCI Fault Domains provide?

Fault Domains in Oracle Cloud Infrastructure (OCI) are designed to enhance the availability and fault tolerance of applications by providing a level of protection that ensures resources are distributed in a way that mitigates the risk of simultaneous failures.

The first aspect of protection provided is against unexpected hardware failures. Fault Domains distribute instances across different physical hardware, which means that if one Fault Domain experiences a hardware failure, the instances in other Fault Domains remain operational. This design minimizes the impact of unplanned outages, enabling improved uptime for applications running on OCI.

Additionally, protection against planned outages during maintenance is inherent in the concept of Fault Domains. The OCI platform ensures that maintenance activities can be conducted without affecting the overall availability of your application. By having resources divided into different Fault Domains, planned maintenance on one domain does not impact instances running in other domains, allowing them to continue functioning normally.

Together, these features ensure that OCI can maintain high availability and resilience in the face of both expected and unexpected incidents, thereby providing a robust environment for deploying mission-critical applications.