Journal ArticleDOI
Probabilistic clock synchronization
TLDR
A probabilistic method is proposed for reading remote clocks in distributed systems subject to unbounded random communication delays and can achieve clock synchronization precisions superior to those attainable by previously published clock synchronization algorithms.Abstract:
A probabilistic method is proposed for reading remote clocks in distributed systems subject to unbounded random communication delays. The method can achieve clock synchronization precisions superior to those attainable by previously published clock synchronization algorithms. Its use is illustrated by presenting a time service which maintains externally (and hence, internally) synchronized clocks in the presence of process, communication and clock failures.read more
Citations
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Proceedings ArticleDOI
An adaptive failure detection protocol
TL;DR: A relatively simple protocol that allows a process to "monitor" another process, and consequently to detect its crash, and which uses control messages only when no application message is sent by the monitoring process to the observed process.
Journal ArticleDOI
Hard real-time communication in multiple-access networks
N. Malcolm,Wei Zhao +1 more
TL;DR: Although this paper concentrates on multiple-access networks, many of the concepts presented and lessons learned are also applicable to other types of networks.
Proceedings ArticleDOI
Event composition in time-dependent distributed systems
TL;DR: Algorithms for event composition and event consumption are presented which make use of accuracy interval based timestamping and illustrate the problems that arise due to inaccuracy and message transmission delays.
Journal ArticleDOI
CesiumSpray>: a Precise and Accurate Global Time Servicefor Large-scale Systems
TL;DR: A global time service for world-wide systems, based on an innovative clock synchronization scheme, named CesiumSpray, which exhibits high precision and accuracy; it is virtually indefinitely scalable; and it is fault-tolerant.
Journal ArticleDOI
Monitoring distributed systems
TL;DR: In this article, a functional model of monitoring in terms of the generation, processing, dissemination, and presentation of information can help determine the facilities needed to design and construct distributed systems.
References
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Journal ArticleDOI
Clock Synchronization in Distributed Real-Time Systems
TL;DR: Depending on the types and number of tolerated faults, this paper presents upper bounds on the achievable synchronization accuracy for external and internal synchronization in a distributed real-time system.
Journal ArticleDOI
Synchronizing clocks in the presence of faults
TL;DR: Three algorithms for maintaining clock synchrony in a distributed multiprocess system where each process has its own clock work in the presence of arbitrary clock or process failures, including “two-faced clocks” that present different values to different processes.
Journal ArticleDOI
Optimal clock synchronization
T. K. Srikanth,Sam Toueg +1 more
TL;DR: This is the first known solution that achieves optimal accuracy—the accuracy of synchronized clocks (with respect to real time) is as good as that specified for the underlying hardware clocks.
Proceedings ArticleDOI
A new fault-tolerant algorithm for clock synchronization
Jennifer Lundelius,Nancy Lynch +1 more
TL;DR: A new fault-tolerant algorithm for solving a variant of Lamport's clock synchronization problem for a system of distributed processes that communicate by sending messages, which solves the problem of maintaining closely synchronized local times, assuming that processes' local times are closely synchronized initially.
Journal ArticleDOI
A new fault-tolerant algorithm for clock synchronization
Jennifer L. Welch,Nancy Lynch +1 more
TL;DR: A new fault-tolerant algorithm for solving a variant of Lamport's clock synchronization problem for a system of distributed processes that communicate by sending messages that maintains synchronization to within a small constant, whose magnitude depends upon the rate of clock drift, the message delivery time and its uncertainty.