Jatkuvikäyttökyky

Jatkuvikäyttökyky, often translated as continuous availability or high availability, refers to the ability of a system, service, or component to remain operational and accessible with minimal or no downtime. The primary goal of jatkuvikäyttökyky is to ensure that users can access and utilize a system whenever they need it, preventing disruptions to business operations or user experience.

Achieving jatkuvikäyttökyky typically involves designing systems with redundancy and failover mechanisms. Redundancy means having duplicate components, such as servers, network connections, or data storage, that can take over if a primary component fails. Failover is the automatic switching to a redundant or standby system upon failure of the primary system.

Common strategies to implement jatkuvikäyttökyky include clustering, where multiple servers work together, and load balancing, which distributes traffic across multiple servers. Data replication ensures that data is available in multiple locations, so if one data source becomes unavailable, another can be used. Regular testing of failover procedures is crucial to ensure they function as intended.

The level of jatkuvikäyttökyky required varies depending on the criticality of the system. Mission-critical applications, such as those in finance or healthcare, demand higher levels of availability than less critical systems. The cost and complexity of implementing jatkuvikäyttökyky increase with the desired uptime percentage.