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Difficulty: MediumDesign Azure Backup Solutions

You are designing a backup solution for a set of Azure Virtual Machines running a critical enterprise application. The virtual machines are configured with Premium SSD v2 managed disks and require backups to be taken every 12 hours. The solution must meet the following requirements:
- Ensure backups are resilient to a zone outage in the primary region.
- Support restoring the virtual machines to a paired region in the event of a regional disaster.
- Allow instant recovery of the virtual machines from snapshots for up to 10 days.

Which two configurations should you include in the backup design? Select two.

  1. A Recovery Services vault configured with geo-zone-redundant storage (GZRS) and Cross-Region Restore enabledAnswer
  2. B
    A Recovery Services vault configured with geo-redundant storage (GRS) and Cross-Region Restore enabled
  3. An Enhanced backup policy with the instant restore retention set to 10 daysAnswer
  4. D
    A Standard backup policy with the instant restore retention set to 10 days

Answer

A Recovery Services vault configured with geo-zone-redundant storage (GZRS) with Cross-Region Restore enabled, and an Enhanced backup policy with the instant restore retention set to 10 days.
The correct configurations are geo-zone-redundant storage (GZRS) with Cross-Region Restore enabled and an Enhanced backup policy with the instant restore retention set to 10 days. GZRS ensures that the backup vault remains available even if an entire availability zone in the primary region fails, while Cross-Region Restore enables recovery in the paired secondary region. An Enhanced backup policy is required because the VMs use Premium SSD v2 disks and need multiple backups per day (every 12 hours), both of which are unsupported by the Standard policy. Furthermore, the Enhanced policy supports the required 10-day instant recovery snapshot retention, whereas the Standard policy is limited to a maximum of 5 days.

Step-by-Step Solution

1
Analyze the storage redundancy and disaster recovery requirements.
The solution must survive a zone failure in the primary region (requiring zone-redundant storage) and support restore to a paired region (requiring geo-replication). Geo-zone-redundant storage (GZRS) combines these two capabilities by replicating data across three zones in the primary region and replicating to a secondary region. Cross-Region Restore must be enabled to allow restoring backups to the secondary region.
This determines the correct vault storage tier and recovery configuration.
2
Evaluate the workload characteristics and backup frequency requirements.
The virtual machines use Premium SSD v2 managed disks and require backups every 12 hours (multiple backups per day). This requires the Enhanced backup policy tier, as the Standard backup policy tier does not support Premium SSD v2 disks and is limited to one backup per day.
This determines the appropriate backup policy tier.
3
Verify the instant recovery retention requirements.
The requirement is to retain instant recovery snapshots for 10 days. The Standard backup policy limits instant restore snapshot retention to a maximum of 5 days. The Enhanced backup policy supports instant restore snapshot retention for up to 30 days.
This confirms that the Enhanced backup policy is required to support the 10-day instant recovery window.

Key Concept

Selecting vault storage redundancy and backup policy tiers based on disk types, backup frequency, zonal availability, and instant recovery duration requirements.
Estimated Time:2m 0s
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Topics

Design Azure Backup Solutions

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