Which OCI service is primarily responsible for automatically maintaining high availability with different regions?

The Data Guard Service in Oracle Cloud Infrastructure (OCI) is specifically designed to ensure high availability and disaster recovery for database deployments. It automatically creates and maintains standby databases in different regions, providing a failover mechanism in case of a primary database failure. This functionality allows organizations to maintain business continuity and minimize downtime, which is essential for critical applications.

Data Guard continuously replicates changes from the primary database to the standby, enabling seamless transition and quick recovery in the event of a disruption. By placing standby databases in different regions, it helps mitigate risks associated with regional outages or failures, affording a robust strategy for high availability across geographical boundaries.

The other services mentioned do not primarily focus on maintaining high availability across regions. While the Load Balancing Service directs traffic among resources to improve uptime, it operates at the instance level rather than across regions. The File Storage Service provides scalable file storage but does not inherently manage database availability or recovery issues. The Core Networking Service facilitates networking capabilities but is not focused on the high availability of databases. Thus, Data Guard stands out as the service that specializes in ensuring high availability through regional replication.