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Classification Key : Exterior Security, DoS


A system component is exposed to failure. Failure of a single component might cause a system outage. How can an available system be designed where a system is tolerant of component failure?


Structure a system with backup components so that the service provided by one component can be resumed by the backup component in case of system failure. In many systems, it is cost-effective to have a backup recovery mechanism.

Known Uses

Offsite disaster recovery services often use standby pattern.

Related Patterns

Replicated System


Open Group Catalog


Standby, Availability


Last modified: May 05, 2012

Conceived and Maintained by: Munawar Hafiz