Disaster Recovery
The ability to restore service and data after a major outage or catastrophic event.
Disaster recovery (DR) restores systems, data, and operations after a major outage from hardware failure, natural disaster, cyberattack, or human error. It is driven by two metrics: Recovery Time Objective (RTO), the maximum tolerable downtime, and Recovery Point Objective (RPO), the maximum acceptable data loss measured in time. Azure Site Recovery replicates on-premises or Azure workloads to a secondary region to meet these goals. Do not confuse DR with high availability: high availability uses redundancy to keep a service running, whereas DR restores service after a failure has already occurred. Azure paired regions provide geographically distant replication targets that help meet RPO during regional disasters.
PlayPrepHQ study notes are written and reviewed against primary exam sources. How we create & review content →