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Optimistic database-driven distributed real-time simulation (05F-SIW-031)
Högskolan i Skövde, Institutionen för kommunikation och information.
Högskolan i Skövde, Institutionen för kommunikation och information.
Department of Computer Science, University of Virginia, 151 Engineer’s Way, P.O. Box 400740, USA.
2005 (engelsk)Inngår i: Fall 2005 Simulation Interoperability Workshop: Fall SIW 2005, Curran Associates, Inc., 2005, s. 223-228Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this paper we present an optimistic synchronization protocol for distributed real-time simulations that uses a database as communication and storage mechanism. Each node in the simulation is also a database node and communication in the simulation is done by storing and reading to the database. The underlying replication protocol in the database then makes sure that all updates are propagated. The progress in the simulation is optimistic, i.e., each node tries to simulate as far ahead as possible without waiting for input from any other node. Since the simulations are said to be real-time we must guarantee that no events can be delivered too early nor too late. Also, recovery of a node must be done within predictable time due to the real-time constraints. Since all updates in the simulation are done through transactions we have a well-defined foundation for recovery and we show how the recovery can be done deterministically. For the simulation to function (and keep deadlines) during network partitions we allow local commits in the database. This requires that all data required on a specific node must be reachable from that node, i.e., no remote accesses should be needed. However, allowing local commits may introduce conflicting updates. These conflicts are detected and solved predictably

sted, utgiver, år, opplag, sider
Curran Associates, Inc., 2005. s. 223-228
Identifikatorer
URN: urn:nbn:se:his:diva-1810Scopus ID: 2-s2.0-84867487612ISBN: 9781622761401 OAI: oai:DiVA.org:his-1810DiVA, id: diva2:32086
Konferanse
Fall Simulation Interoperability Workshop 2005, SIW Fall 2005; Orlando, FL; 18 September 2005 through 23 September 2005
Tilgjengelig fra: 2007-09-03 Laget: 2007-09-03 Sist oppdatert: 2017-11-27bibliografisk kontrollert

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Scopushttp://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.127.8389http://www.sisostds.org/DigitalLibrary.aspx?Command=Core_Download&EntryId=26387

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