Single Point of Failure (SPOF)

In computing, SPOFs are identified and resolved through redundant and high-availability clusters. For example, upon machine failure, another machine immediately assumes lost functions and responsibilities. Similar redundancy designs are often employed at internal component levels. At system levels, multiple machines or systems provide required redundancy. Replication is used at the site level, where another site or location is prepared to take over in the event of sudden site access failure.

Highly reliable systems are designed without SPOFs. This means that failure of a component, system or site does not halt system or operational functions.