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Which Azure Virtual Machine feature staggers updates across VMs based on their update domain and fault domain? Availability setsScale setsUpdate sets

Question

Which Azure Virtual Machine feature staggers updates across VMs based on their update domain and fault domain?

  • Availability sets
  • Scale sets
  • Update sets
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Solution

The feature that staggers updates across VMs based on their update domain and fault domain in Azure Virtual Machine is Availability sets.

Here's a step-by-step explanation:

  1. In Azure, you can group multiple virtual machines into an Availability Set. This helps to ensure that at least one virtual machine is available during either a planned or unplanned maintenance event.

  2. An Availability Set is a logical grouping of VMs within a datacenter that allows Azure to understand how your application is built to provide for redundancy and availability.

  3. It includes two features: update domains and fault domains.

  4. Update domains are a logical group of underlying hardware that can undergo maintenance or be rebooted at the same time. Azure ensures that VMs you place within an Availability Set run across multiple physical servers, compute racks, storage units, and network switches.

  5. Fault domains define the group of virtual machines that share a common power source and network switch. This is essentially the rack of servers. It limits the impact of potential physical hardware failures, network outages, or power interruptions.

  6. By placing your VMs in an Availability Set, Azure ensures that during either a planned or unplanned maintenance event, at least one virtual machine will be available and meet the 99.95% Azure SLA.

  7. Therefore, by staggering updates across VMs based on their update domain and fault domain, Azure ensures high availability and minimizes the impact of downtime.

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