redundancy
NounWordNet 3.0
Noun (4)
- repetition of messages to reduce the probability of errors in transmission
- the attribute of being superfluous and unneeded“the use of industrial robots created redundancy among workers”Synonyms: redundance
- (electronics) a system design that duplicates components to provide alternatives in case one component fails
- repetition of an act needlessly
Webster's Dictionary (GCIDE)
1.The quality or state of being redundant; superfluity; superabundance; excess. [1913 Webster]
2.That which is redundant or in excess; anything superfluous or superabundant. [1913 Webster]
Labor . . . throws off redundacies.— Addison.[1913 Webster]
3.(Law) Surplusage inserted in a pleading which may be rejected by the court without impairing the validity of what remains. [1913 Webster]
Free On-line Dictionary of Computing
1.<architecture, parallel> The provision of multiple interchangeable components to perform a single function in order to provide resilience (to cope with failures and errors). Redundancy normally applies primarily to hardware. For example, a cluster may contain two or three computers doing the same job. They could all be active all the time thus giving extra performance through parallel processing and load balancing; one could be active and the others simply monitoring its activity so as to be ready to take over if it failed ("warm standby"); the "spares" could be kept turned off and only switched on when needed ("cold standby"). Another common form of hardware redundancy is disk mirroring.
2.<data, communications, storage> data redundancy.
(1995-05-09)