7 terms
Failover is the switch of a server workload from a failed component to a standby, keeping a service available when hardware or software breaks.
Fault tolerance is the ability of a server system to keep operating correctly, without interruption, when one or more of its components fail.
High availability is a server design goal that keeps a service running through component failures by removing single points of failure and automating failover.
Redundancy in server reliability means duplicating critical components so that a single failure does not interrupt the service or lose data.
RPO, the recovery point objective, is the maximum amount of recent data, measured in time, that a server system may lose after a failure or disaster.
RTO, the recovery time objective, is the maximum acceptable time a server or service may stay down after a disruption before it must be restored.
Uptime is the share of time a server or service is running and available, usually expressed as a percentage such as 99.9 percent over a defined…