System and method for duplexed replicated computing

摘要

Systems and methods are disclosed herein for a replicated duplex computer system. The system includes a triplet of network elements, which each maintain a clock signal, and a monitor at each network element for monitoring incoming clock signals. Each network element interfaces with a fault containment region (FCR). The system provides the ability to transition to a duplex system if one of the fault containment regions fails. The three network elements are able to send their clock signals to the other network elements and receive their own clock signal and clock signals from the other elements. The monitors are configured to detect discrepancies in the clock signals of the network elements. If a monitor determines that an FCR has failed, each network element is reconfigured so that the FTPP system operates in a duplex mode without the faulty FCR by replacing the clock signal from the faulty element with its own clock signal.

主权项

1. A system for providing replicated fault tolerant computing configured to operate in at least a triplex mode and a duplex mode, the system comprising:
a triplet of network elements operating in the triplex mode, wherein each of the network elements includes a processor operable to:
maintain a clock signal;receive as inputs its own clock signal and the clock signals from each of the other network elements; andprovide communication operations with each of the other network elements; and a monitor contained within each of the network elements, the monitor configured to detect a discrepancy in the communication operations among the triplet of network elements and in response to the detection of a discrepancy:
determine a faulty network element;re-configure the network elements to operate in the duplex mode without the faulty network element; andat each non-faulty network element, substitute the clock signal from the faulty network element with a copy of its own clock signal.