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Difficulty: EasyAzure Regions, Availability Zones, and Region Pairs

A company is planning to deploy a database in Azure. To comply with local data residency laws, all database replicas must reside within the same geographic region. However, the database must remain highly available even if an entire datacenter within that region experiences a power outage or cooling system failure. Which Azure feature should the company use to meet these requirements?

  1. A
    Region Pairs
  2. B
    Resource Groups
  3. Availability ZonesAnswer
  4. D
    Azure Edge Zones

Answer

Availability Zones
Availability Zones are unique physical locations within an Azure region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking. By deploying resources across Availability Zones, organizations achieve high availability and protection against localized datacenter failures while ensuring all data remains within the boundaries of the single chosen region.

Step-by-Step Solution

1
Analyze the high availability requirement.
The application must survive a datacenter-level failure, such as a localized power or cooling outage.
This indicates a need for physical isolation between datacenters within the deployment boundary.
2
Analyze the data residency constraint.
All data replicas must remain within the same geographic region.
This rules out multi-region replication architectures like Region Pairs.
3
Select the Azure feature that offers intra-region datacenter redundancy.
Availability Zones provide physically separate datacenters with independent infrastructure inside a single region.
Deploying across Availability Zones satisfies both high availability (independent power/cooling) and data residency within the same region.

Key Concept

Azure Availability Zones provide high availability within a single region by using physically isolated datacenters with independent power, cooling, and networking.
Estimated Time:45s
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Topics

Azure Regions, Availability Zones, and Region Pairs

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