.NET Architecture & System Design Interview Question #173

What is disaster recovery?

Security Architecture, Multi-Tenancy & Disaster Recovery Senior Advanced

Quick Interview Answer

Disaster recovery is the set of plans, systems, and procedures used to restore service and data after a major failure such as regional infrastructure loss, destructive operator error, or severe data corruption.

Detailed Explanation

A disaster-recovery design includes backups, replication where needed, alternate infrastructure, recovery procedures, responsibilities, and regular testing. A backup that has never been restored is not sufficient evidence of recoverability.

Code Example

Primary Environment
      |
 backups / replication
      v
Recovery Environment

Runbook + tested restoration