Fault Tolerance

DATA STRUCTURES

What is shimmy-tolerant system
Fault-tolerance or graceful degradation is the property that enables a system (often computer-based) to embrace operating properly in the resultant of the failure of (or oneness or more faults within) some of its components. Fault-tolerance is peculiarly sought-after in high-availability or life-critical systems.
Fault tolerance requirements:
The staple fibre characteristics of fault tolerance require:
No single shoot of repair
Fault isolation to the failing component
Fault containment to prevent propagation of the failure
Availability of reversion modes
Fault-tolerance by replication
Spare components address the first fundamental characteristic of fault-tolerance in three ways:
Replication: Providing tenfold identical instances of the aforementioned(prenominal) system or subsystem, directing tasks or requests to all of them in parallel, and choosing the correct result on the basis of a quorum;
surplusage: Providing multiple identical instances of the same system and switching to one of the remaining instances in case of a failure.
Diversity: Providing multiple different implementations of the same specification, and using them like replicated systems to cope with errors in a specific implementation.




Fault-tolerant design
In engineering, fault-tolerant design, also know as fail-safe design, is a design that enables a system to continue operation, possibly at a reduced level (also known as graceful degradation), rather than failing completely, when some function of the system fails.
When to use
Providing fault-tolerant design for every component is normally not an option. In such cases the following criteria may be utilize to determine which components should be fault-tolerant:
How critical is the component? In a car, the radio is not critical, so this component has less emergency for fault-tolerance.
How promising is the component to fail? Some components, like the train shaft in a car, are not likely to fail, so no...If you want to get a full essay, tell it on our website: Orderessay



If you want to get a full essay, wisit our page: write my essay .