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<p><b>Abstract</b>—The <it>time-triggered message-triggered object</it> (TMO) scheme was formulated a few years ago as a major extension of the conventional object structuring schemes with the idealistic goal of facilitating general-form design and timeliness-guaranteed design of complex real-time application systems. Recently, as a new scheme for realizing TMO-structured distributed and parallel computer systems capable of both hardware and software fault tolerance, we have formulated and demonstrated the <it>primary-shadow TMO replication</it> (PSTR) scheme. An important new extension of the PSTR scheme discussed in this paper is an integration of the PSTR scheme and a network surveillance (NS) scheme. This extension results in a significant improvement in the fault coverage and recovery time bound achieved. The NS scheme adopted is a recently developed scheme effective in a wide range of point-to-point networks and it is called the <it>supervisor-based NS</it> (SNS) scheme. The integration of the PSTR scheme and the SNS scheme is called the <it>PSTR/SNS</it> scheme. The recovery time bound of the PSTR/SNS scheme is analyzed on the basis of an implementation model that can be easily adapted to various commercial operating system kernels.</p>
Time-triggered message-triggered object, TMO, primary-shadow TMO replication, PSTR, network surveillance, NS, SNS, point-to-point networks, real-time systems, recovery time bound.
K.H. (Kane) Kim, Chittur Subbaraman, "The PSTR/SNS Scheme for Real-Time Fault Tolerance via Active Object Replication and Network Surveillance", IEEE Transactions on Knowledge & Data Engineering, vol. 12, no. , pp. 145-159, March/April 2000, doi:10.1109/69.842258
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