Azure Availability Set

Azure Availability Set is a feature that helps increase the availability and reliability of your virtual machines (VMs) by distributing them across multiple fault domains and update domains. Fault domains are physical groupings of hardware that provide isolation from failures, while update domains allow you to perform maintenance and updates without affecting all VMs at once. By placing VMs in an Availability Set, you ensure that they are spread across different hardware and maintenance schedules, reducing the risk of simultaneous failures and improving overall uptime. This feature is crucial for maintaining high availability for critical applications and services running in Azure.