What is “High Availability” in the Cloud?

Michael

I would like to understand the concept of High Availability (HA) in cloud computing and how organizations design systems that remain accessible even when failures occur. How do cloud providers achieve high availability through techniques such as redundancy, load balancing, failover mechanisms, and deploying resources across multiple availability zones or regions? What role do major cloud platforms like AWS, Microsoft Azure, and Google Cloud play in supporting highly available architectures? Additionally, what important factors—such as uptime guarantees, fault tolerance, scalability, and disaster recovery—should organizations consider when building cloud applications that require continuous availability and minimal downtime?

Jessica

High Availability (HA) in cloud computing means designing systems that stay accessible and continue working even when some components fail. Cloud providers achieve this by using redundancy, load balancing, and failover systems, and by deploying applications across multiple availability zones or regions. Platforms like AWS, Microsoft Azure, and Google Cloud provide built-in services that support highly available architectures. When building cloud applications, organizations also consider factors such as uptime guarantees, fault tolerance, scalability, and disaster recovery to ensure systems remain reliable and minimize downtime.