3.2 - Configure VMs for High Availability and Scalability

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What is the purpose of a proximity placement group?

Reduce latency by placing VMs physically closer.

How do managed disks and availability sets complement each other?

By ensuring that VM disks in an aligned availability set are in different storage fault domains.

What is the default number of instances supported by Virtual Machine Scale Set (VMSS)?

100 instances

What conditions are necessary for a large-scale set in VMSS?

Using multiple placement groups and, if using a custom image, supporting up to 600 instances. Signup and view all the answers

What is recommended for large-scale sets (>100 instances) in Azure Load Balancer?

Standard SKU or Azure Application Gateway Signup and view all the answers

What is the maximum number of instances a Virtual Machine Scale Set (VMSS) can scale up to by using multiple placement groups?

1,000 instances Signup and view all the answers

What happens to all instances within a VMSS in terms of the operating system disk image?

They all use the same operating system disk image. Signup and view all the answers

What are the three options available when updating VMSS instances?

Automatic (random order), Rolling (multiple batches with pause time), and Manual (programmatic update using PowerShell commands). Signup and view all the answers

What is the purpose of Availability Zones in Azure?

To ensure a higher level of resiliency and protect applications from disruptions. Signup and view all the answers

How are Virtual Machines (VMs) distributed in a configuration of three Availability Zones?

VMs are automatically distributed across three fault domains and three update domains. Signup and view all the answers

Why is health monitoring crucial for a VMSS when utilizing managed infrastructure and automatic OS upgrades?

To ensure proper functioning and reliability of the instances. Signup and view all the answers

What does the Spreading Algorithm option for Health Monitoring decide in a VMSS?

How scale set instances are placed in a fault domain. Signup and view all the answers

What is the role of Fault domains in Azure?

Fault domains group servers with shared power, cooling, and networking. Signup and view all the answers

Explain the concept of Update domains in Azure.

Update domains represent servers that can be rebooted simultaneously. Signup and view all the answers

How do Availability sets contribute to redundancy and high availability?

By ensuring that at least two VMs are placed in an availability set, which guarantees availability in case of a host update or problem. Signup and view all the answers

Why is it recommended to align availability sets with your workload or application tier?

To ensure that each tier has redundancy and high availability within its own availability set. Signup and view all the answers

What is the maximum number of update domains an availability set can have in Azure?

20 update domains. Signup and view all the answers

How many fault domains can an availability set have in Azure?

3 fault domains. Signup and view all the answers

Why is it crucial to set the availability set at the VM's creation time?

To ensure proper distribution of VMs across update and fault domains. Signup and view all the answers

What is the SLA uptime guaranteed by deploying two or more VMs across two or more availability zones in Azure?

99.99% SLA uptime. Signup and view all the answers