Introduction Azure High Availability and Fault Tolerance

Azure High Availability (HA): High availability in Azure ensures that applications and services remain accessible with minimal downtime. It is achieved through a combination of redundancy and load balancing across different resources. Azure provides various built-in services like Availability Zones, which are physically separate data centers within an Azure region, and Availability Sets, which distribute virtual machines (VMs) across multiple fault and update domains to reduce downtime during maintenance or failures.
Azure Fault Tolerance: Fault tolerance in Azure is the ability of a system to continue functioning even when some of its components fail. Azure achieves fault tolerance through redundancy and automated failover mechanisms. Services like Azure Load Balancer and Azure Traffic Manager help route traffic to healthy resources, while services like Azure Site Recovery offer disaster recovery capabilities. Azure also uses data replication for storage solutions like Azure Storage and Azure SQL Database to ensure data integrity and availability.