Question

Difficulty: MediumConfigure VMs for High Availability

AeroSpace Dynamics is deploying a flight telemetry analysis workload in the Central US region. The workload will run on 33 virtual machines named VM-Telemetry1, VM-Telemetry2, and VM-Telemetry3. The customer requires a service level agreement (SLA) of at least 99.99%99.99\% virtual machine uptime. You need to configure a high availability solution that meets the SLA requirements.

Which deployment strategy should you select?

  1. Deploy VM-Telemetry1, VM-Telemetry2, and VM-Telemetry3 across 33 distinct Availability Zones in the Central US region.Answer
  2. B
    Deploy VM-Telemetry1, VM-Telemetry2, and VM-Telemetry3 within a single Availability Set configured with 33 fault domains.
  3. C
    Place VM-Telemetry1, VM-Telemetry2, and VM-Telemetry3 in a single Availability Set and associate the set with 33 different Availability Zones.
  4. D
    Deploy VM-Telemetry1, VM-Telemetry2, and VM-Telemetry3 as single-instance virtual machines using Premium SSD storage.

Answer

Deploying the virtual machines across three distinct Availability Zones in the Central US region.
Deploying the virtual machines across three distinct Availability Zones in the Central US region provides physical isolation and redundant power, cooling, and networking, which allows Azure to guarantee a 99.99%99.99\% virtual machine uptime SLA.

Step-by-Step Solution

1
Identify the target SLA requirement for the deployment.
The target SLA is 99.99%99.99\% virtual machine uptime.
The configuration must be selected based on meeting or exceeding this specific SLA target.
2
Evaluate the SLA of Availability Sets.
Availability Sets guarantee an SLA of 99.95%99.95\%.
Availability Sets protect against hardware failures within a datacenter but do not meet the 99.99%99.99\% SLA requirement.
3
Evaluate the SLA of Availability Zones.
Deploying VMs across two or more Availability Zones guarantees an SLA of 99.99%99.99\%.
Availability Zones provide independent power, cooling, and networking infrastructure to guarantee a higher SLA.

Key Concept

Azure Virtual Machine High Availability SLAs
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