NDLI: Expert system for unix system reliability and availability enhancement

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Expert system for unix system reliability and availability enhancement

Content Provider	NASA Technical Reports Server (NTRS)
Author	Xu, Catherine Q.
Copyright Year	1993
Description	Highly reliable and available systems are critical to the airline industry. However, most off-the-shelf computer operating systems and hardware do not have built-in fault tolerant mechanisms, the UNIX workstation is one example. In this research effort, we have developed a rule-based Expert System (ES) to monitor, command, and control a UNIX workstation system with hot-standby redundancy. The ES on each workstation acts as an on-line system administrator to diagnose, report, correct, and prevent certain types of hardware and software failures. If a primary station is approaching failure, the ES coordinates the switch-over to a hot-standby secondary workstation. The goal is to discover and solve certain fatal problems early enough to prevent complete system failure from occurring and therefore to enhance system reliability and availability. Test results show that the ES can diagnose all targeted faulty scenarios and take desired actions in a consistent manner regardless of the sequence of the faults. The ES can perform designated system administration tasks about ten times faster than an experienced human operator. Compared with a single workstation system, our hot-standby redundancy system downtime is predicted to be reduced by more than 50 percent by using the ES to command and control the system.
File Size	514548
Page Count	9
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930016399
Archival Resource Key	ark:/13960/t9867f60j
Language	English
Publisher Date	1993-02-01
Access Restriction	Open
Subject Keyword	Airline Operations C++ Programming Language Redundancy Computer Systems Performance On-line Systems Computer Programs System Failures Fault Tolerance Command and Control Downtime C Programming Language Unix Operating System Workstations Reliability Expert Systems Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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