This document describes how applications that are built on Oracle Kubernetes Engine (OKE) can continue operating even if an entire geographic region of Oracle Cloud Infrastructure (OCI) is lost. A basic knowledge of OCI is assumed.
Each scenario builds upon the previous ones, describing the incremental design differences that arise in more challenging scenarios.
Scenarios start with a simple active-passive stateless application, and then add the requirements of stateful services and active-active operation.
Some applications are so critical that there is a need to ensure that processing can continue even if there is a loss of all availability domains within a region. Disaster Recovery (DR) focuses on minimizing data loss and ensuring the ability to resume processing in the event of the loss of a geographic region. While basic DR can be achieved via offsite backups (and a potentially lengthy recovery process), the simplest way to achieve DR while maintaining application availability in the event of the loss on an entire region is to configure an active-passive multi-region deployment. Read the complete article here.
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