This paper describes an approach to fault-tolerant parallel computing which is based on the experiences with the most successful fault-tolerant software – the transaction processing systems. The algorithms presented here have less runtime overhead and faster recovery than most preceding approaches. In the Pact parallel programming environment fault tolerance is provided fully user transparent i...

The ability to guarantee that a system will continue to operate correctly under degraded conditions is key to the success of adopting multi-agent systems (MAS) as a paradigm for designing complex agent based fault tolerant systems. In order to provide such a guarantee, practically usable tools and techniques for verifying fault tolerant MAS architectures are urgently required. In this paper we ...

Software almost inevitably contains defects. Do everything possible to reduce the fault rate; Use faulttolerance techniques to deal with software faults. Fault tolerance is the ability of a system to perform its function correctly even in the presence of internal faults. Most of the ordinary systems lack fault tolerant software fix. This paper surveys various software Fault Tolerance techniques...

There are many distributed systems which use a leader in their logic. When such systems need to be fault tolerant and the current leader suffers a technical problem, it is necesary to apply a special algorithm in order to choose a new leader. In this paper I present a new fault tolerant algorithm which elects a new leader based on a random roulette wheel selection.

This paper presents a review and discussion of post-factum software systems integration. The problem is de ned; the approaches and associated issues are discussed. Integration of redundant software components, developed using diverse software engineering methodologies, into a fault tolerant system is reviewed. Finally, a novel approach to fault tolerant software integration, based on the critic...

ÐThis paper describes a modular approach for the construction of fault-tolerant agreement protocols. The approach is based on a generic consensus service. Fault-tolerant agreement protocols are built using a client-server interaction, where the clients are the processes that must solve the agreement problem and the servers implement the consensus service. This service is accessed through a gene...

Fault-tolerant distributed algorithms are central for building reliable spatially distributed systems. Unfortunately, the lack of a canonical precise framework for fault-tolerant algorithms is an obstacle for both verification and deployment. In this paper, we introduce a new domainspecific framework to capture the behavior of fault-tolerant distributed algorithms in an adequate and precise way...

With the introduction of clustered messaging brokers and the fault-tolerant Mobile Connector, we can guarantee the exactly-once consumption of messages by agents. The context-aware messaging allowed us to decrease the messaging overhead which has to be present in any fault-tolerant solution. This paper proposes a complete fault-tolerant layer for multi-agent systems (EFTL) that does not restric...

With the introduction of clustered messaging brokers and the fault-tolerant Mobile Connector, we can guarantee the exactly-once consumption of messages by agents. The context-aware messaging allowed us to decrease the messaging overhead which has to be present in any fault-tolerant solution. This paper proposes a complete fault-tolerant layer for multi-agent systems (EFTL) that does not restric...

This article deals with modeling and design of a new fault-tolerant voter circuit. Majority voted redundancy is increasingly implemented in fault-tolerant design today. A voter is used in these implementations to determine a possibly correct result through the majority vote. The reliability of the voter circuit should be much higher than that of the other circuit elements; otherwise it will wip...