1985/01/01 by Leslie Lamport, P. M. Melliar-Smith, P. M. Melliar‐Smith · 7 citations
Computer Science · #Distributed systems and fault tolerance #Parallel Computing and Optimization Techniques #Interconnection Networks and Systems
paper · pdf · doi:10.1145/2455.2457
Algorithms are described for maintaining clock synchrony in a distributed multiprocess system where each process has its own clock. These algorithms work in the presence of arbitrary clock or process failures, including “two-faced clocks” that present different values to different processes. Two of the algorithms require that fewer than one-third of the processes be faulty. A third algorithm works if fewer than half the processes are faulty, but requires digital signatures.