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Difficulty: MediumDesign Azure Backup Solutions

A company is migrating a business-critical application to Azure Virtual Machines. The database VMs require a robust backup strategy to meet strict operational recovery objectives. The backup design must satisfy the following technical requirements:
- Backups must be replicated to a secondary Azure region to allow restore operations even if the primary region is completely unavailable.
- To support rapid recovery of database files, local snapshots must be kept in the hardware source tier for 7 days.
- Daily recovery points must be retained in the vault for 45 days.

Which backup configuration should you select to meet these requirements?

  1. A Recovery Services vault configured with Geo-Redundant Storage (GRS) using a backup policy of the Enhanced tier with the snapshot retention period set to 7 days.Answer
  2. B
    A Recovery Services vault configured with Geo-Redundant Storage (GRS) using a backup policy of the Standard tier with the snapshot retention period set to 7 days.
  3. C
    A Backup vault configured with Geo-Redundant Storage (GRS) using a backup policy of the Standard tier with the snapshot retention period set to 7 days.
  4. D
    A Recovery Services vault configured with Locally Redundant Storage (LRS) using a backup policy of the Enhanced tier with the snapshot retention period set to 7 days.

Answer

A Recovery Services vault configured with Geo-Redundant Storage (GRS) using a backup policy of the Enhanced tier with the snapshot retention period set to 7 days.
The configuration using a Recovery Services vault with Geo-Redundant Storage (GRS) and an Enhanced tier policy is correct. A Recovery Services vault is required to back up Azure VMs. GRS replicates the backup data to a secondary paired region to survive a primary region failure. The Enhanced policy tier is necessary because it supports custom snapshot (instant restore) retention up to 30 days, allowing the specified 7-day local snapshot requirement to be met.

Step-by-Step Solution

1
Determine the required vault type for Azure Virtual Machine backups.
Azure Virtual Machine backups require a Recovery Services vault, as Backup vaults do not support this workload type.
Ensures the backup target is compatible with the source workload.
2
Evaluate the storage redundancy requirement for regional disaster recovery.
The vault must be configured with Geo-Redundant Storage (GRS) to replicate backups to a secondary region and survive a primary region failure.
Meets the requirement for replication to a secondary Azure region.
3
Determine the required backup policy tier for a 7-day snapshot retention.
An Enhanced policy tier must be used because the Standard policy tier restricts instant recovery snapshot retention to a maximum of 5 days.
Ensures local snapshots are kept for 7 days to meet the low RTO objective.

Key Concept

Azure Backup vault types, storage redundancy, and policy tier capabilities
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Topics

Design Azure Backup Solutions

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