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Real Time and Fault Tolerant

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Real Time and Fault Tolerant Systems

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Document Type: Essay
General Topic: Computers and the Internet - Computer Technology
School Level: Master
Sources: 0
Views: 70
Words: 3152
Pages: 11
Paper #: 36377313

......Fault Tolerance Strategies Used
Redundancy
Redundancy has been defined as the duplication of critical components of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe (Answers.com, 2010). The two nodes of the NCAPS system offer redundancy because they mirror each other, always providing one node in primary status and the other in backup status. If one fails, the other is available to take over
Redundancy in the NCAPS system can also be found in the NSM, where heartbeats are exchanged between the two NSMs. When one NSM does not receive a configurable number of heartbeats from the other within a configurable period of time, it sends a node-down message to its subscribers (the PPM only). When the other node is restarted and the two NSMs resume exchanging heartbeats, the NSM sends a node-up message to its subscribers, (Laranjeira, 1998 p. 442)......

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