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System support for "multiple worlds"
Columbia University, Department of Computer Science.
Columbia University, Department of Computer Science.ORCID iD: 0000-0002-6066-746X
1989 (English)Report (Other academic)
Abstract [en]

Concurrently computing alternative solutions to a problem can be used as a method to improve response time. In order to maintain internal consistency despite differences caused by alternative solution methods, "Multiple Worlds" are created. This paper examines the operating system requirements posed by such a method.

Problems include (1) side-effects and (2) combinatorial expldsion in the amount of state which must be preserved. We solve these by process management and an application of "copy-onwrite" virtual memory management. Side effects resulting from interprocess communication are handled by a specialized message layer which interacts with process management.

Place, publisher, year, edition, pages
New York, NY, USA: Columbia University, Department of Computer Sceince , 1989. , 10 p.
, Columbia University, Department of Computer Sceince, Technical Report, CUCS-437-89
National Category
Computer Science
Research subject
URN: urn:nbn:se:kth:diva-63052OAI: diva2:481571
QC 20120227Available from: 2012-02-27 Created: 2012-01-21 Last updated: 2013-09-09Bibliographically approved

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Maguire Jr., Gerald Q.
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