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Difficulty: EasyDesign Azure Backup Solutions

You are designing a backup solution for several production Azure Virtual Machines. The business continuity requirements state that the backup data must be protected against a regional disaster that causes a complete outage of the primary Azure region. The solution must also allow for the restoration of the virtual machines to a secondary paired region. Which storage redundancy configuration should you select for the Recovery Services vault?

  1. Geo-redundant storage (GRS)Answer
  2. B
    Locally redundant storage (LRS)
  3. C
    Zone-redundant storage (ZRS)
  4. D
    Read-access geo-redundant storage (RA-GRS) configured to allow direct write operations to the secondary region

Answer

Geo-redundant storage (GRS)
The correct option is Geo-redundant storage (GRS). It replicates backup data to a secondary paired region, ensuring that the backups remain available even if the primary region experiences a complete outage. This meets the requirement of protecting against a regional disaster and allows virtual machines to be restored in the secondary region.

Step-by-Step Solution

1
Analyze the business continuity requirements to identify the scope of protection needed.
The requirements state that the backup data must survive a regional disaster that causes a complete outage of the primary Azure region.
This rules out Locally redundant storage (LRS) and Zone-redundant storage (ZRS) since they store backup data exclusively within the primary region.
2
Determine the storage replication option that replicates data to a secondary region.
Geo-redundant storage (GRS) replicates backup data to a secondary paired region.
GRS ensures that backups are available even if the entire primary region experiences an outage.
3
Evaluate if the replication option allows the secondary region to receive direct write operations.
Azure storage replication options like RA-GRS do not support active-active write operations to the secondary region.
A secondary storage endpoint is read-only unless a failover occurs, so configuring RA-GRS for write capability is invalid.

Key Concept

Selecting vault storage redundancy to meet regional disaster recovery requirements
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Topics

Design Azure Backup Solutions

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