Failover

Failover is switching to a redundant or standby computer server, system, hardware component or network upon the failure or abnormal termination of the previously active application,^[1] server, system, hardware component, or network in a computer network. Failover and switchover are essentially the same operation, except that failover is automatic and usually operates without warning, while switchover requires human intervention.

^ For application-level failover, see for example Jayaswal, Kailash (2005). "27". Administering Data Centers: Servers, Storage, And Voice Over IP. Wiley-India. p. 364. ISBN 978-81-265-0688-0. Retrieved 2009-08-07. Although it is impossible to prevent some data loss during an application failover, certain steps can [...] minimize it..

[1] For application-level failover, see for example Jayaswal, Kailash (2005). "27". Administering Data Centers: Servers, Storage, And Voice Over IP. Wiley-India. p. 364. ISBN 978-81-265-0688-0. Retrieved 2009-08-07. Although it is impossible to prevent some data loss during an application failover, certain steps can [...] minimize it..

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