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Zorluk: OrtaDesign Compute High Availability

An organization is designing a multi-tier web application on Azure. The application's backend web tier consists of 44 Azure Virtual Machines that require a cumulative compute SLA of 99.99%99.99\% and low-latency network communication between the virtual machines to support high-throughput in-memory caching. You need to design the compute infrastructure. Which two configurations should you include in the design? (Each correct answer presents part of the complete solution.)

  1. Deploy the virtual machines across two or more Availability Zones in the region.Cevap
  2. Deploy the virtual machines in a single Proximity Placement Group.Cevap
  3. C
    Deploy all virtual machines within a single Availability Zone using an Availability Set.
  4. D
    Deploy the virtual machines as Azure Spot VMs in a single scale set.

Cevap

To meet the requirements, the design must include deploying the virtual machines across multiple Availability Zones to achieve the 99.99%99.99\% SLA, and placing them in a single Proximity Placement Group to ensure low-latency communication.
To meet the 99.99%99.99\% SLA requirement, virtual machines must be deployed across two or more Availability Zones in the same region. To meet the low-latency placement requirement, a Proximity Placement Group should be used to physically group the virtual machines.

Adım Adım Çözüm

1
Determine the configuration required to meet the 99.99%99.99\% uptime SLA.
Identify that Azure guarantees a 99.99%99.99\% SLA only when two or more instances are deployed across two or more Availability Zones in the same region.
This guarantees that the virtual machines are distributed across isolated power, cooling, and networking zones.
2
Determine the configuration required to meet the low-latency communication requirement.
Identify that a Proximity Placement Group is needed to group the VMs physically closer to reduce network latency.
Proximity Placement Groups ensure that VMs are located in the same physical datacenter to minimize latency.

Anahtar Kavram

Azure virtual machine high availability design using Availability Zones for SLA and Proximity Placement Groups for low latency.
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