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Difficulty: MediumDesign Compute High Availability

A logistics enterprise is designing the compute architecture for a core dispatch routing service on Azure. The service runs on Azure Virtual Machines and requires a minimum virtual machine uptime SLA of 99.99%99.99\% to meet business requirements. The architecture must protect the service against localized datacenter failures within the Azure region. Which of the following compute deployment strategies should you recommend to meet these requirements?

  1. A
    Deploy the virtual machines in an Availability Set within a single Azure Availability Zone.
  2. Deploy the virtual machines across multiple Azure Availability Zones within the region.Answer
  3. C
    Deploy the virtual machines as Spot Virtual Machines across multiple Azure Availability Zones.
  4. D
    Deploy the virtual machines within a Proximity Placement Group restricted to a single Azure Availability Zone.

Answer

Deploying the virtual machines across multiple Azure Availability Zones within the region.
Deploying virtual machines across multiple Azure Availability Zones in the same region provides a 99.99%99.99\% VM uptime SLA and protects the workload against localized datacenter or zonal failures. Each Availability Zone is a distinct physical location with independent power, cooling, and networking.

Step-by-Step Solution

1
Analyze the SLA and high availability requirements.
The application requires a virtual machine uptime SLA of at least 99.99%99.99\% and protection against datacenter-level outages.
These parameters dictate the level of physical isolation and redundancy required.
2
Evaluate the SLA offerings of different Azure compute configurations.
A multi-zone VM deployment offers 99.99%99.99\% SLA, whereas an Availability Set offers 99.95%99.95\%, and Spot VMs offer no SLA.
Understanding Azure SLA commitments is crucial for designing compliant business continuity solutions.
3
Select the option that meets both the SLA and resilience criteria.
Deploying the VMs across multiple Availability Zones in the region meets the 99.99%99.99\% SLA and protects against localized datacenter outages.
Each zone is an isolated datacenter environment with independent power, cooling, and networking.

Key Concept

Azure Virtual Machine High Availability Options and SLAs
Estimated Time:1m 30s
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Topics

Design Compute High Availability

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