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Difficulty: EasyCompute Virtualization Solutions

A company plans to deploy a new public-facing web application on Azure Virtual Machines. The application will run steady-state, predictable workloads 24/7 and requires a guaranteed availability SLA of 99.99%. Which two virtual machine configurations or options should you select to meet these requirements while optimizing costs? (Select two.)

  1. Azure Reserved Virtual Machine Instances to reduce compute costs for the predictable workload.Answer
  2. Azure Virtual Machines deployed across multiple Availability Zones to meet the 99.99% availability SLA.Answer
  3. C
    Azure Spot Virtual Machines to minimize compute costs for the production web application.
  4. D
    A single availability zone deployment for all virtual machine instances to minimize network latency and inter-zone transfer costs.

Answer

Select Azure Reserved Virtual Machine Instances to reduce compute costs for the predictable workload, and deploy Azure Virtual Machines across multiple Availability Zones to meet the 99.99% availability SLA.
Azure Reserved Virtual Machine Instances are ideal for steady-state workloads running continuously, as they offer significant discounts for a committed term. To achieve the 99.99% availability SLA, Azure requires virtual machines to be deployed across multiple Availability Zones in a region.

Step-by-Step Solution

1
Analyze the availability requirement.
The application requires a 99.99% availability SLA.
Azure guarantees a 99.99% uptime SLA for virtual machines only when two or more instances are deployed across two or more Availability Zones in the same region.
2
Analyze the cost optimization requirement for a 24/7 steady-state workload.
Azure Reserved Virtual Machine Instances (RIs) should be used.
Reserved Instances allow you to commit to a one-year or three-year plan, providing deep discounts for predictable, continuous compute workloads.
3
Evaluate and rule out incorrect options based on constraints.
Spot VMs and single zone deployments are ruled out.
Spot VMs can be evicted at any time and offer no SLA, making them unsuitable for production workloads. A single zone deployment cannot provide the 99.99% availability SLA.

Key Concept

Designing high-availability and cost-optimized virtual machine solutions using Availability Zones and Reserved Instances.
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Topics

Compute Virtualization Solutions

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