123. High Availability

High Availability

The ability of a service to e continuously available by minimizing the downtime to the lowest amount possible

Uptime

The number of min or hrs that the system remains online over a given period, and this uptime is usually expressed as a percentage

Load Balancing

The process of distributing workloads across multiple computing resources

99.9999%

31 seconds of downtime each and every year

Clustering

Use of multiple computers, multiple storage devices, and redundant network connections that all work together as a single system to provide high levels of availability, reliability, and scalability

Redundancy

The duplication of critical components or functions of a system with the intention of increasing the reliability of the system