AZ-305 Question 113
Select 2A global manufacturing company hosts critical workloads on both on-premises Hyper-V virtual machines and Azure VMs. They need a disaster recovery and backup strategy with an RPO of under 15 minutes and an RTO of less than 4 hours. The solution must replicate on-premises servers to Azure to enable failover, and also protect Azure VMs. Which two Azure services or configurations should you recommend to meet these recovery objectives?
- A
Use Azure Site Recovery to replicate on-premises VMs to Azure
- B
Store backups in a locally redundant storage (LRS) account for high availability
- C
Protect Azure VMs with Azure Backup configured in a Recovery Services vault
- D
Use Azure Migrate to continuously replicate servers for disaster recovery
- E
Manually export VHD snapshots from Azure VMs to on-premises storage each day
Show answer and explanation
Correct answers: A, C
Explanation
To meet stringent RPO and RTO objectives for both on-premises and Azure workloads, Microsoft recommends using Azure Site Recovery to replicate on-premises virtual machines to Azure for disaster recovery failover, while Azure Backup protects VMs already running in Azure. Site Recovery ensures near-continuous replication and swift failover/failback, and Azure Backup provides dependable backups for VMs in Azure. For further details, refer to the Microsoft documentation on 'Azure Site Recovery' and 'Azure Backup' for best practices and configuration guidance.
- A. Correct.
Option 1: CORRECT. Azure Site Recovery can replicate on-premises virtual machines to Azure, allowing you to achieve low RPO values (as low as 30 seconds in some cases) and an RTO of a few hours or less. This meets the company’s requirements for on-premises workloads.
- B. Incorrect.
Option 2: INCORRECT. Locally redundant storage provides redundancy only within a single Azure region. While LRS protects against some hardware issues, it does not provide region-wide disaster recovery capabilities, so it fails to meet strict RPO and RTO objectives across regions.
- C. Correct.
Option 3: CORRECT. Azure Backup protects Azure VMs by creating recovery points in a Recovery Services vault. This solution ensures quick restore times if a VM is corrupted or deleted, helping meet the required RTO and providing ongoing backups that assist in meeting the RPO.
- D. Incorrect.
Option 4: INCORRECT. Azure Migrate primarily assesses and migrates workloads to Azure but is not designed as a continuous replication or backup tool for disaster recovery and backup scenarios.
- E. Incorrect.
Option 5: INCORRECT. Manually exporting VHD snapshots is not a practical way to meet a 15-minute RPO. This approach is labor-intensive, prone to human error, and insufficient for rapid recovery.