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Difficulty: HardDesign Azure Backup Solutions

You are designing a backup solution for an Azure Virtual Machine that hosts a critical transaction database. The virtual machine is configured as follows:

* Operating system disk: Standard SSD
* Data disks: Premium SSD v2

The backup solution must meet the following requirements:
* Provide a Recovery Point Objective (RPO) of 4 hours for the data disks.
* Support instant recovery from snapshots for up to 7 days.
* Retain weekly backups for 12 months in the vault.
* Ensure that the backup data remains available even if a primary datacenter in the region experiences an outage.
* Minimize storage costs by excluding the operating system disk from the frequent backups.

Which three configurations should you include in the backup design? (Select three.)

  1. A Recovery Services vault configured with Zone-Redundant Storage (ZRS)Answer
  2. An Enhanced backup policy with a schedule configured for every 4 hoursAnswer
  3. Selective disk backup configuration to exclude the operating system diskAnswer
  4. D
    A Standard backup policy with the instant restore retention set to 7 days
  5. E
    A Recovery Services vault configured with Locally Redundant Storage (LRS)

Answer

The correct configurations are: a Recovery Services vault configured with Zone-Redundant Storage (ZRS), an Enhanced backup policy with a schedule configured for every 4 hours, and selective disk backup configuration to exclude the operating system disk.
To meet the requirements, the backup design must use an Enhanced backup policy because the VM uses Premium SSD v2 data disks, which are not supported by the Standard policy. The Enhanced policy also supports sub-daily schedules (achieving the 4-hour RPO) and selective disk backup, allowing the OS disk to be excluded. Finally, configuring the Recovery Services vault with Zone-Redundant Storage (ZRS) ensures the backups survive a datacenter outage in the region.

Step-by-Step Solution

1
Determine the required backup policy tier.
Select the Enhanced backup policy tier.
Premium SSD v2 data disks require the Enhanced backup policy tier, which also supports sub-daily (every 4 hours) backups and selective disk exclusions.
2
Determine the storage redundancy tier for the Recovery Services vault.
Select Zone-Redundant Storage (ZRS).
ZRS replicates the backup data across three availability zones in the region, ensuring availability if a primary datacenter fails.
3
Configure selective disk backup in the Enhanced policy.
Exclude the operating system disk.
This minimizes vault storage costs by backing up only the database data disks.

Key Concept

Selecting and configuring the correct Azure Backup vault tier, policy type, and redundancy to meet performance, RPO, and resilience requirements.
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Topics

Design Azure Backup Solutions

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