Failure monitoring and detection phase is a critical part in providing a scalability, reliability and high availability in current distributed environment. Heartbeat style of interaction is a widely used technique. This technique is utilized for detecting a fault where it monitors the heartbeats of system resources continuously in a very short interval. However, this approach has its limitation...

Perfect failure detectors can correctly decide whether a computer is crashed. However; it is impossible to implement a perfect failure detector in purely asynchronous systems. We show how to enforce perfect failure detection in timed distributed systems with hardware watchdogs. The two main system model assumptions are ( I ) each computer can measure time intervals with a known maximum error, a...

A distributed algorithm is crash quiescent if it eventually stops sending messages to crashed processes. An algorithm can be made crash quiescent by providing it with either a crash notification service or a reliable communication service. Both services can be implemented in practical environments with failure detectors. Therefore, crash-quiescent failure detection is fundamental to system-wide...

What does it mean to solve a distributed task? In Paxos, Lamport proposed a definition of solvability in which every process is split into a proposer that submits commands to be executed, an acceptor that takes care of the command execution order, and a learner that receives the outcomes of executed commands. The resulting perspective of computation in which every proposed command can be execut...

Non-destructive detection and evaluation of invisible cracks in metal structures is an important matter in several critical environments including ground transportation, air transportation and power plants. In this paper, a high-Q near-field Microwave probe is designed and fabricated using defected ground structures for surface and subsurface crack detection in metal structures. For this purpos...

Many people rightly consider that failure detection should be provided as a generic distributed system service to be used to support fault-tolerance within many applications, in spite of possibly very diverse requirements. Reality is however different, as classical techniques are normally unable to cope with many distributed applications running simultaneously. To overcome this problem, we advo...

the paper presents a multi-factor decision-making approach for prioritizing failure modes as an alternative to traditional approach of failure mode and effect analysis (fmea). the approach is based on the ‘technique for order preference by similarity to ideal solution’ (topsis). the priority ranking is formulated on the basis of six parameters (failure occurrence, non-detection, maintainability...

Peer-to-peer (P2P)–Grid systems are being investigated as a platform for converging the Grid and P2P network in the construction of large-scale distributed applications. The highly dynamic nature of P2P–Grid systems greatly affects the execution of the distributed program. Uncertainty caused by arbitrary node failure and departure significantly affects the availability of computing resources an...