Title :
Fault detection and recovery coverage improvement by clock synchronized duplicated systems with optimal time diversity
Author :
Kanekawa, N. ; Meguro, T. ; Isono, K. ; Shima, Y. ; Miyazaki, N. ; Yamaguchi, S.
Author_Institution :
Res. Lab., Hitachi Ltd., Ibaraki, Japan
Abstract :
Fast fault detection and recovery are indispensable to improve the availability of fail-safe and fault-tolerant systems. Fast fault detection and recovery can be realized by clock-synchronized duplicated systems with optimal time diversity, which have fast fault detection and recovery features. The experiments presented in this paper compare fault detection coverage and retry recovery coverage of a clock-synchronized system without optimal time diversity, a clock-synchronized system with optimal time diversity, and an I/O synchronized system. The experimental results show that clock-synchronized systems with optimal time diversity realize the highest fault detection and recovery coverage.
Keywords :
clocks; fault diagnosis; fault tolerant computing; optimisation; synchronisation; system recovery; I/O synchronized system; availability; clock-synchronized duplicated systems; fail-safe systems; fault detection coverage improvement; fault-tolerant systems; optimal time diversity; retry recovery coverage improvement; self-checking; Circuit faults; Clocks; Delay; Fault detection; Fault tolerant systems; Laboratories; Logic; Rail transportation; Synchronization; Timing;
Conference_Titel :
Fault-Tolerant Computing, 1998. Digest of Papers. Twenty-Eighth Annual International Symposium on
Conference_Location :
Munich, Germany
Print_ISBN :
0-8186-8470-4
DOI :
10.1109/FTCS.1998.689470