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Difficulty: HardDesign Azure Backup Solutions

You are designing a backup and recovery solution for an Azure virtual machine that runs a critical middleware application. The virtual machine uses Premium SSD managed disks.

Your solution must satisfy the following technical requirements:
- Resilience: Backups must be recoverable even in the event of a complete disaster in the primary Azure region.
- Operational RTO: Any recovery of files or full virtual machines from backups created within the last 10 days must take less than 15 minutes.
- Retention: Backups must be kept for a total of 180 days to meet compliance regulations.
- Cost: Minimize overall storage and management costs.

Which backup vault type, storage redundancy, and policy configuration should you select to meet these requirements?

  1. A
    A Recovery Services Vault configured with Locally Redundant Storage (LRS), using an Enhanced backup policy with the instant restore retention set to 10 days and the vault retention set to 180 days.
  2. B
    A Recovery Services Vault configured with Geo-Redundant Storage (GRS), using a Standard backup policy with the instant restore retention set to 10 days and the vault retention set to 180 days.
  3. A Recovery Services Vault configured with Geo-Redundant Storage (GRS), using an Enhanced backup policy with the instant restore retention set to 10 days and the vault retention set to 180 days.Answer
  4. D
    A Backup Vault configured with Geo-Redundant Storage (GRS), using an Enhanced backup policy with the instant restore retention set to 10 days and the vault retention set to 180 days.

Answer

A Recovery Services Vault configured with Geo-Redundant Storage (GRS), using an Enhanced backup policy with the instant restore retention set to 10 days and the vault retention set to 180 days.
The correct solution uses a Recovery Services Vault to back up the Azure Virtual Machine. The vault is configured with Geo-Redundant Storage (GRS) to satisfy the disaster recovery resilience requirement. Because the operational RTO requires recovering from local snapshots (instant restore) for up to 10 days, an Enhanced backup policy must be used since Standard backup policies limit instant restore retention to a maximum of 5 days. The remainder of the 180-day compliance retention is safely stored in the standard vault storage tier.

Step-by-Step Solution

1
Identify the vault type required for the workload.
Recovery Services Vault is selected because Backup Vaults do not support Azure Virtual Machine backup.
Azure Virtual Machines require a Recovery Services Vault for native backup agent integration and recovery operations.
2
Determine the required vault storage redundancy for the resilience requirement.
Geo-Redundant Storage (GRS) is selected.
GRS replicates backup data to a secondary region, satisfying the resilience requirement to survive a complete primary region disaster, whereas LRS keeps all data in a single datacenter.
3
Evaluate the backup policy tier based on the operational Recovery Time Objective (RTO).
Enhanced backup policy is selected.
To meet the 10-day instant restore requirement, an Enhanced backup policy is required since Standard backup policies only support a maximum of 5 days of instant restore (snapshot) retention. The rest of the 180 days of retention is cost-effectively stored in the vault storage tier.

Key Concept

Designing Azure Virtual Machine backups using Recovery Services Vaults and selecting Standard versus Enhanced backup policies to support snapshot-level retention requirements.
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Topics

Design Azure Backup Solutions

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