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Difficulty: HardAzure Regions, Availability Zones, and Region Pairs

A financial services company is planning to migrate its core application to Azure. The application architecture must satisfy two key requirements:
1. It must remain operational in the event of a local power, cooling, or hardware failure within the primary datacenter.
2. It must support a disaster recovery plan that replicates data to a secondary region located at least 300 miles away, while ensuring compliance with strict data residency regulations that prohibit data from leaving the country of origin.

Which deployment strategy should the company implement to meet these requirements?

  1. A
    Deploy the virtual machines in a single Availability Zone that spans across both the primary region and its paired region to ensure synchronous replication.
  2. Deploy the virtual machines across multiple Availability Zones in the primary region, and configure database replication to the primary region's designated Azure Region Pair.Answer
  3. C
    Deploy the virtual machines in a single datacenter within the primary region, and rely on the Availability Zones of that region to serve as the regional disaster recovery solution.
  4. D
    Deploy all virtual machines in the primary region and rely on the resource group's location to automatically replicate and distribute the VMs to the paired region.

Answer

Deploying the virtual machines across multiple Availability Zones in the primary region and configuring database replication to the primary region's designated Azure Region Pair.
To protect against local datacenter outages (like power or cooling failures), resources should be distributed across multiple Availability Zones in the primary region, as each zone represents a unique physical location with independent power, cooling, and networking. To protect against a regional disaster while meeting strict data residency laws, data replication should target the region's designated Azure Region Pair, which is located in the same geography (usually the same country) and is positioned at least 300 miles away.

Step-by-Step Solution

1
Analyze the high availability requirement within the primary region to protect against localized datacenter failures (power, cooling, hardware).
Determine that deploying resources across multiple Availability Zones in the primary region provides physical isolation within the region.
Each Availability Zone is a unique physical location with independent power, cooling, and networking.
2
Analyze the disaster recovery and data residency requirements for replicating data to a secondary region.
Determine that using the region's designated Azure Region Pair within the same geography (country) satisfies the 300-mile distance requirement and maintains data residency compliance.
Azure Region Pairs are always located within the same geography/country boundary (with the exception of Brazil South) and are at least 300 miles apart to protect against regional disasters.

Key Concept

Azure Regions, Availability Zones, and Region Pairs
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Topics

Azure Regions, Availability Zones, and Region Pairs

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