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Difficulty: MediumDesign Compute High Availability

A gaming company is designing the compute layer for a real-time multiplayer matchmaking and session hosting application. The backend will run on Azure Virtual Machines. The design must meet the following requirements:
- Provide a virtual machine uptime SLA of at least 99.99%99.99\%.
- Minimize network latency between the application servers.

Which two actions should you include in the design? (Select two.)

  1. Deploy the virtual machines across two or more Availability Zones in the same region.Answer
  2. Deploy the virtual machines within a Proximity Placement Group.Answer
  3. C
    Deploy the virtual machines in an Availability Set.
  4. D
    Configure the virtual machines as Azure Spot Virtual Machines.
  5. E
    Configure Azure Traffic Manager to perform SSL offloading and route traffic to the virtual machines.

Answer

To design a compute solution that meets both the 99.99%99.99\% uptime SLA and the low-latency requirements, you should deploy the virtual machines across two or more Availability Zones in the same region and place them within a Proximity Placement Group.
Deploying virtual machines across two or more Availability Zones ensures the design meets the 99.99%99.99\% VM uptime SLA. Placing these virtual machines within a Proximity Placement Group ensures they are physically located close to one another to minimize inter-VM network latency.

Step-by-Step Solution

1
Analyze the SLA requirement.
The application requires an uptime SLA of at least 99.99%99.99\%.
In Azure, a 99.99%99.99\% VM uptime SLA is only guaranteed when two or more virtual machines are deployed across two or more Availability Zones in the same region. Availability Sets only provide a 99.95%99.95\% SLA.
2
Analyze the latency requirement.
The application requires minimized network latency between the virtual machines.
A Proximity Placement Group is a physical co-location grouping that ensures virtual machines are placed as close to each other as possible within a datacenter, thereby reducing inter-VM network latency.
3
Evaluate cost and operational constraints.
Exclude options that do not support high availability or the specified protocol features.
Spot VMs do not offer any uptime SLA and are subject to eviction, making them unsuitable for high availability. Azure Traffic Manager operates at the DNS level and does not support SSL offloading.

Key Concept

Designing high availability compute infrastructure using Azure Availability Zones and Proximity Placement Groups to balance uptime SLA and network latency.
Estimated Time:2m 0s
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Topics

Design Compute High Availability

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