20 Questions
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.
What is recommended for large-scale sets (>100 instances) in Azure Load Balancer?
Standard SKU or Azure Application Gateway
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
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.
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).
What is the purpose of Availability Zones in Azure?
To ensure a higher level of resiliency and protect applications from disruptions.
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.
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.
What does the Spreading Algorithm option for Health Monitoring decide in a VMSS?
How scale set instances are placed in a fault domain.
What is the role of Fault domains in Azure?
Fault domains group servers with shared power, cooling, and networking.
Explain the concept of Update domains in Azure.
Update domains represent servers that can be rebooted simultaneously.
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.
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.
What is the maximum number of update domains an availability set can have in Azure?
20 update domains.
How many fault domains can an availability set have in Azure?
3 fault domains.
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.
What is the SLA uptime guaranteed by deploying two or more VMs across two or more availability zones in Azure?
99.99% SLA uptime.
Learn about key features like availability zones, availability sets, load balancers, and proximity placement groups on Azure to build resilient and available systems. Deploying across multiple availability zones ensures a higher level of resiliency and protects applications from disruptions, guaranteeing a 99.99% SLA uptime.
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