Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsMedium
A financial institution is migrating its on-premises application to Azure. The application processes critical transactions and has a Recovery Time Objective (RTO) of 4 hours and a Recovery Point Objective (RPO) of 1 hour. The institution needs to design a disaster recovery solution for its Azure Virtual Machines (VMs). Which Azure service should be used to meet these RTO and RPO requirements?
- AAzure Storage Account geo-redundant storage (GRS)
- BAzure Backup
- CAzure Disk Snapshots
- DAzure Site Recovery
Show answer & explanationAnswer & explanation
Correct answer: D. Azure Site Recovery
Azure Site Recovery is designed for disaster recovery of VMs, offering continuous replication and orchestration of failover/failback, which can meet RTOs of hours and RPOs of minutes, fitting the specified requirements.
Why the other options are wrong
- A. Azure Storage Account GRS provides geo-redundant storage for data but does not provide VM replication or automated failover capabilities required for disaster recovery of VMs.
- B. Azure Backup is primarily for data backup and restoration, not for orchestrating rapid failover of entire VMs to a secondary region for disaster recovery with specific RTO/RPO.
- C. Azure Disk Snapshots are point-in-time copies of disks, useful for backup or creating new VMs, but not for continuous replication and automated disaster recovery of running VMs.
Azure Site Recovery (ASR)
Azure Site Recovery is a disaster recovery service that enables replication, failover, and failback of workloads running on Azure VMs, on-premises VMs, and physical servers.
- Provides continuous replication for VMs.
- Orchestrates failover and failback processes.
- Helps meet specific RTOs (Recovery Time Objectives) and RPOs (Recovery Point Objectives).
Memory trick: Site Recovery: Orchestrates VMs failover, fast and reliable.