fault tolerance - definizione. Che cos'è fault tolerance
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Cosa (chi) è fault tolerance - definizione

ABILITY OF A SYSTEM TO CONTINUE FUNCTIONING DESPITE ERRONEOUS INPUTS OR FAULTS WITHIN SOME OF ITS COMPONENTS
Fault-tolerance; Fault Tolerance; Graceful degradation; Failure-oblivious computing; Fault-tolerant; Fault-tolerant system; Fault tolerant systems; Fault tolerant designs; Fault-tolerant designs; Fault-tolerant systems; Graceful failure; Fail gracefully; Fault tolerant system; Fault tolerant design; Fail-safe (computer); Failure oblivious computing; Damage tolerant design; Degrade gracefully; Fault-tolerant computer system; Fail soft; Fail-soft operation; Fault-tolerant computer systems; Failure resistance; Fault-tolerant design; Fault tolerant; Fault-tolerant computing; Degrades gracefully; Failure tolerance; Single fault condition; Single Fault Condition
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fault tolerance         
<architecture> 1. The ability of a system or component to continue normal operation despite the presence of hardware or software faults. This often involves some degree of redundancy. 2. The number of faults a system or component can withstand before normal operation is impaired. (1995-04-06)
Fault tolerance         
Fault 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. 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.
fault tolerant         

Wikipedia

Fault tolerance

Fault 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. 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. Fault tolerance is particularly sought after in high-availability, mission-critical, or even life-critical systems. The ability of maintaining functionality when portions of a system break down is referred to as graceful degradation.

A 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 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. That is, the system as a whole is not stopped due to problems either in the hardware or the software. An example in another field is a motor vehicle designed so it will continue to be drivable if one of the tires is punctured, or a structure that is able to retain its integrity in the presence of damage due to causes such as fatigue, corrosion, manufacturing flaws, or impact.

Within the scope of an individual system, fault tolerance can be achieved by anticipating exceptional conditions and building the system to cope with them, and, in general, aiming for self-stabilization so that the system converges towards an error-free state. However, if the consequences of a system failure are catastrophic, or the cost of making it sufficiently reliable is very high, a better solution may be to use some form of duplication. In any case, if the consequence of a system failure is so catastrophic, the system must be able to use reversion to fall back to a safe mode. This is similar to roll-back recovery but can be a human action if humans are present in the loop.