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Difficulty: MediumCompute Virtualization Solutions

A financial services company is designing the Azure compute virtualization solution for a new core payment processing application. The application will run continuously (24/724/7) and requires a highly available infrastructure with a 99.99%99.99\% SLA. Due to strict regulatory compliance, the application must run on isolated physical hardware dedicated to the company, and the virtual machines require a high memory-to-vCPU ratio to support caching massive transaction tables. Which compute solution should you recommend to meet these requirements?

  1. Azure Dedicated Hosts running Esv5-series Virtual Machines deployed across multiple Availability ZonesAnswer
  2. B
    Azure Spot Virtual Machines running Esv5-series on Azure Dedicated Hosts to minimize compute costs
  3. C
    Esv5-series Virtual Machines deployed in a single Availability Zone using a Virtual Machine Scale Set
  4. D
    An Azure Kubernetes Service (AKS) cluster using Esv5-series Virtual Machines on Azure Dedicated Hosts

Answer

Azure Dedicated Hosts running Esv5-series Virtual Machines deployed across multiple Availability Zones
The correct option is the deployment of Azure Dedicated Hosts running Esv5-series Virtual Machines across multiple Availability Zones. This combination satisfies all criteria: Azure Dedicated Hosts ensure physical isolation at the hardware host level to meet compliance; Esv5-series VMs are memory-optimized, offering the high memory-to-vCPU ratio required for in-memory caching; and utilizing multiple Availability Zones ensures the resilience needed to meet the high availability SLA.

Step-by-Step Solution

1
Analyze the isolation requirement
The requirement for isolated physical hardware dedicated to the company points to Azure Dedicated Hosts.
Azure Dedicated Hosts provide physical servers dedicated to a single Azure subscription, satisfying strict physical isolation and regulatory requirements.
2
Analyze the workload characteristics and sizing requirements
The requirement for a high memory-to-vCPU ratio for caching transaction tables points to memory-optimized virtual machine families, such as the Esv5-series.
Esv5-series virtual machines are memory-optimized and provide a high memory-to-vCPU ratio, unlike general-purpose or storage-optimized series.
3
Analyze the availability and continuity requirements
The 24/724/7 continuous operation and 99.99%99.99\% SLA require deploying across multiple Availability Zones and avoiding Spot VMs.
Spot VMs are subject to eviction and do not support SLAs, while deploying in a single zone exposes the application to zone-level failures, preventing the team from meeting the 99.99%99.99\% SLA.

Key Concept

Selecting Azure compute hosting options, virtual machine families, and availability configurations based on compliance, performance, and SLA constraints.
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Topics

Compute Virtualization Solutions

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