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Difficulty: MediumCompute Virtualization Solutions

An energy utility company is designing the Azure compute infrastructure for two distinct workloads:

* Workload 1: A smart-meter telemetry ingestion service that runs 24/7, requires a 99.99% availability SLA, and must allow individual virtual machines to be patched and managed independently.
* Workload 2: A monthly billing simulation report that takes 6 hours to run, can tolerate interruptions, and must be completed at the lowest possible compute cost.

Which two virtual machine configurations should you recommend to meet these requirements?

  1. Deploy virtual machines using Virtual Machine Scale Sets in Flexible orchestration mode across multiple Availability Zones for Workload 1.Answer
  2. Deploy virtual machines as Azure Spot Virtual Machines for Workload 2.Answer
  3. C
    Deploy virtual machines as Azure Spot Virtual Machines for Workload 1.
  4. D
    Deploy all virtual machines within a single Availability Zone using an Availability Set for Workload 1.

Answer

To meet the requirements, the smart-meter telemetry service should be deployed using Virtual Machine Scale Sets in Flexible orchestration mode across multiple Availability Zones, and the billing simulation report should be run on Azure Spot Virtual Machines.
The telemetry ingestion service requires a 99.99% SLA, which can only be achieved by distributing instances across multiple Availability Zones. Flexible orchestration mode provides the ability to manage, patch, and control individual virtual machines independently, which satisfies the operational requirement. The billing simulation workload is interruptible and cost-sensitive, making Azure Spot VMs the most appropriate and cost-effective solution.

Step-by-Step Solution

1
Analyze the availability and management requirements for the smart-meter telemetry service.
The workload requires a 99.99% availability SLA and individual virtual machine management.
Determining the high availability and orchestration requirements helps select the correct deployment model.
2
Determine the optimal high availability deployment option for the telemetry service.
Multiple Availability Zones are required to achieve the 99.99% SLA, and Flexible orchestration mode is required for individual virtual machine control.
Uniform orchestration mode does not allow the same level of granular management for individual virtual machines, and a single availability zone only offers a 99.95% SLA.
3
Analyze the cost and interruption tolerance for the billing simulation report.
The workload is interruptible, runs for a limited time, and must minimize costs.
This determines whether discounted, non-guaranteed compute options like Spot VMs can be utilized.
4
Select the compute model for the billing simulation.
Azure Spot VMs are the most cost-effective option for non-critical, interruptible batch processing.
Spot VMs offer up to a 90% discount compared to pay-as-you-go rates, satisfying the budget constraint since the workload can tolerate evictions.

Key Concept

Designing highly available, cost-effective compute solutions using Virtual Machine Scale Sets and Azure Spot VMs based on application SLA and interruption tolerance.
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Topics

Compute Virtualization Solutions

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