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DeeDS: Towards a Distributed and Active Real-Time Database Systems
University of Skövde, Department of Computer Science.ORCID iD: 0000-0002-6662-9034
University of Skövde, Department of Computer Science.ORCID iD: 0000-0003-2895-0780
University of Skövde, Department of Computer Science.
University of Skövde, Department of Computer Science.ORCID iD: 0000-0002-5223-4381
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1996 (English)In: ACM Sigmod Record, Vol. 25, no 1, p. 38-40Article in journal (Refereed) Published
Abstract [en]

DeeDS combines active database functionality with critical timing constraints and integrated system monitoring. Since the reactive database mechanisms, or rule management system, must meet critical deadlines, we must employ methods that make triggering of rules and execution of actions predictable. We will focus on the scheduling issues associated with dynamic scheduling of workloads where the triggered transactions have hard, firm or soft deadlines, and how transient overloads may be resolved by substituting transactions by computationally cheaper ones. The rationale for a loosely coupled general purpose event monitoring facility, that works in tight connection with the scheduler, is presented. For performance and predictability, the scheduler and event monitor are executing on a separate CPU from the rest of the system. Real-time database accesses in DeeDS are made predictable and efficient by employing methods such as main memory resident data, full replication, eventual consistency, and prevention of global deadlocks.

Place, publisher, year, edition, pages
1996. Vol. 25, no 1, p. 38-40
National Category
Information Systems
Identifiers
URN: urn:nbn:se:his:diva-1179OAI: oai:DiVA.org:his-1179DiVA, id: diva2:2305
Available from: 2008-06-17 Created: 2008-06-17 Last updated: 2018-06-12Bibliographically approved

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Andler, Sten F.Hansson, JörgenMellin, JonasBerndtsson, Mikael

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