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Difficulty: MediumAzure Regions, Availability Zones, and Region Pairs

A company is planning to deploy a critical database application in Azure. The application must meet the following requirements:
- Maintain uptime in the primary region even if an entire datacenter suffers a power or cooling failure.
- Replicate data to a secondary region located at least 300 miles away to survive a regional disaster.
The company creates a resource group in the East US region to manage the deployment.
Which deployment strategy should the company use to satisfy these requirements?

  1. A
    Deploy the application across Availability Zones that span between the East US and West US regions.
  2. B
    Deploy the application in a single datacenter in East US, and configure an Availability Set to replicate data for regional disaster recovery.
  3. Deploy the application across multiple Availability Zones within East US, and replicate data to the East US regional pair.Answer
  4. D
    Deploy all components exclusively within East US, as Azure resources are required to reside in the same region as their resource group.

Answer

Deploy the application across multiple Availability Zones within East US, and replicate data to the East US regional pair.
Deploying the application across multiple Availability Zones within East US ensures that if one datacenter experiences a localized outage, the application remains online in other zones. Replicating the data to the East US regional pair ensures that data is stored at least 300 miles away, protecting the application against a major regional disaster.

Step-by-Step Solution

1
Analyze the requirement for local high availability.
Identify that Azure Availability Zones provide protection against localized datacenter failures (like power or cooling outages) by distributing resources across unique physical locations within a single region.
This directly satisfies the requirement to maintain uptime in the primary region.
2
Analyze the requirement for regional disaster recovery.
Identify that Azure Region Pairs provide replication to a secondary region (typically 300+ miles apart) to protect against a regional disaster.
This satisfies the requirement to replicate data to a distant secondary region.
3
Determine if there are resource group location restrictions.
Confirm that resources do not need to reside in the same region as their containing resource group.
Resource groups only store resource metadata, allowing resources within the group to reside in different regions.

Key Concept

Azure Availability Zones provide high availability within a region by isolating power, cooling, and networking across datacenters, while Azure Region Pairs provide regional disaster recovery by replicating resources across regions that are at least 300 miles apart.
Estimated Time:1m 30s
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Topics

Azure Regions, Availability Zones, and Region Pairs

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