Impossibility result

خرید بک لینک

In a fully asynchronous message-passing distributed system, in which one process may have a crash failure, it has been proved that consensus is impossible. However, this impossibility result derives from a worst-case scenario of a process schedule, which is highly unlikely. In reality, process scheduling has a degree of randomness.

In an asynchronous model, some forms of failures can be handled by a synchronous consensus protocol. For instance, the loss of a communication link may be modelled as a process which has suffered a Byzantine failure.

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