Overview of Scenarios
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.
Scenario 1: Active-Passive deployment of a stateless application with external persistent state
Overview
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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