NDLI: Synchronization and fault-masking in redundant real-time systems

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Synchronization and fault-masking in redundant real-time systems

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shin, K. G. Krishna, C. M. Butler, R. W.
Copyright Year	1983
Description	A real time computer may fail because of massive component failures or not responding quickly enough to satisfy real time requirements. An increase in redundancy - a conventional means of improving reliability - can improve the former but can - in some cases - degrade the latter considerably due to the overhead associated with redundancy management, namely the time delay resulting from synchronization and voting/interactive consistency techniques. The implications of synchronization and voting/interactive consistency algorithms in N-modular clusters on reliability are considered. All these studies were carried out in the context of real time applications. As a demonstrative example, we have analyzed results from experiments conducted at the NASA Airlab on the Software Implemented Fault Tolerance (SIFT) computer. This analysis has indeed indicated that in most real time applications, it is better to employ hardware synchronization instead of software synchronization and not allow reconfiguration.
File Size	1716027
Page Count	35
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850020332
Archival Resource Key	ark:/13960/t1dk08b7t
Language	English
Publisher Date	1983-11-14
Access Restriction	Open
Subject Keyword	Algorithms Redundancy Synchronism Redundant Components Reliability Engineering Hardware Architecture Computers Run Time Computers Computer Programs Real Time Operation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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