Path: utzoo!utgpu!watserv1!watmath!att!att!rutgers!mcnc!uvaarpa!murdoch!murdoch.acc.virginia.edu!dwells From: dwells@fits.cx.nrao.edu (Don Wells) Newsgroups: comp.realtime Subject: Re: Realtime and fault-tolerance together? Message-ID: Date: 5 Nov 90 03:58:04 GMT References: <720@dynasys.UUCP> Sender: news@murdoch.acc.Virginia.EDU Organization: National Radio Astronomy Observatory, Charlottesville, VA Lines: 24 In-Reply-To: jessea@dynasys.UUCP's message of 2 Nov 90 16:35:30 GMT In article <720@dynasys.UUCP> jessea@dynasys.UUCP (Jesse W. Asher) writes: From: jessea@dynasys.UUCP (Jesse W. Asher) Newsgroups: comp.realtime Date: 2 Nov 90 16:35:30 GMT I was wondering if any realtime operating systems also incorporated fault-tolerant considerations. If so, how are they implemented software-wise? How do hardware based fault-tolerance systems interact with software based realtime? It seems to me that they go hand in hand in many cases and that one would want to implement both in a system. ... I consider a hardware-based watchdog timer with automatic reboot to be a form of fault-tolerance. In many cases a software-based watchdog timer is almost as effective for this purpose. -- Donald C. Wells, Assoc. Scientist | dwells@nrao.edu Nat. Radio Astronomy Observatory | 6654::DWELLS Edgemont Road | +1-804-296-0277 38:02.2N Charlottesville, VA 22903-2475 USA | +1-804-296-0278(Fax) 78:31.1W