![]() That is, the system as a whole is not stopped due to problems either in the hardware or the software. The term is most commonly used to describe computer systems designed to continue more or less fully operational with, perhaps, a reduction in throughput or an increase in response time in the event of some partial failure. Ī fault-tolerant design enables a system to continue its intended operation, possibly at a reduced level, rather than failing completely, when some part of the system fails. The ability of maintaining functionality when portions of a system break down is referred to as graceful degradation. Fault tolerance is particularly sought after in high-availability, mission-critical, or even life-critical systems. If its operating quality decreases at all, the decrease is proportional to the severity of the failure, as compared to a naively designed system, in which even a small failure can cause total breakdown. JSTOR ( January 2008) ( Learn how and when to remove this template message)įault tolerance is the property that enables a system to continue operating properly in the event of the failure of one or more faults within some of its components. ![]() Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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