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Implementing a Fault-Tolerant Design
Connecting network components into a fault-tolerant configuration ensures that one hardware failure doesn’t halt the network. You can achieve network fault-tolerance by providing redundant data paths, redundant hubs, and other such features. Generally, however, the data on the server itself—its hard drives—is the most crucial.


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When developing a fault-tolerance scheme, remember that you must balance the need for rapid recovery from a failure against cost. The basic theory behind fault-tolerant design is hardware redundancy, which translates into additional hardware expenses. Also, remember that the greater the level of redundancy, the greater the complexity involved in the implementation.

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