Abstract
We have identified applications that require both active and real-time database support. One of them is network management. In response to the needs of this application an active real-time DBMS (aRTDBMS) is being developed that combines the support of hard and soft real-time with active capabilities. In this paper we identify the temporal behavior of active DBMS features and select a set of features for which the temporal behavior can be controlled. We further show how to integrate the active real-time DBMS with a real-time operating system kernel and how contingency rules can be executed with predictable temporal behavior by locating the event detector for high-priority contingency events in the operating system. Contingency rules can be used to deal with emergency situations in an application or with overload situations in the aRTDBMS.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
U. Dayal, B. Blaustein, A. Buchmann et al. The HiPAC Project: Combining Active Databases and Timing Constraints. SIGMOD Record, 17, 1, March 1988.
F. Manola, M. F. Hornick, and A. P. Buchmann. Object Data Model Facilities for Multimedia Data Types. Technical Report TM-0332-11-90-165, GTE Laboratories Inc., 1991.
B. Purimetla, R. M. Sivasankaran, J. A. Stankovic. A Study of Distributed Real-Time Active Database Applications. In the Proceedings of the IEEE Workshop on Parallel and Distributed Real-time Systems, April 1993.
A. P. Buchmann, D. McCarthy, M. Hsu, and U. Dayal. Time-Critical Database Scheduling: A Framework for Integrating Real-Time Scheduling and ConcurrencyControl. In the Proceedings of Conference on Data Engineering, 1989.
S. Gatziu and K. R. Dittrich. Events in an Active Object-Oriented Database System. In Proc. 1st Int. Workshop on Rules in Database Systems, Edinburgh, Sept. 1993.
A. P. Sistla and O. Wolfson. Temporal Triggers in Active Databases. Technical Report, Dept. of Electrical Engineering and Computer Science, University of Illinois, Chicago, 1992.
B. Purimetla, R. M. Sivasankaran, J. A. Stankovic et al. Priority Assignment in Real-Time Active Databases. In the Proceedings of the 3rd International Conference on Parallel and Distributed Information Systems, September 1994.
R. Abbot and H. Garcia-Molina. Scheduling Real-Time Transactions: A Performance Evaluation. TODS, 17, 3, 1992.
K. Ramamritham. Real-Time Databases. International Journal of Distributed and Parallel Databases, 1993.
K. Ramamritham, S. Son, A. Buchmann, K. Dittrich, and C. Mohan. Real-Time Databases. Panel statement, In the Proceedings of VLDB 17, 1991.
S. Chakravarthy and D. Mishra. An Event Speciication Language (SNOOP) for Active Databases and its Detection. Technical Report, University of Florida, Gainesville, Sept. 1991.
U. Dayal, A. Buchmann, and D. McCarthy. Rules are Objects Too: A Knowledge Model for an Active Object-Oriented Database System. In em the Proceedings of the 2nd International Workshop on Object Oriented Database Systems, Bad Muenster, Germany, Sept. 1988.
A. Buchmann, J. Zimmermann, J. A. Blakeley, and D. L. Wells. Building an Integrated Active OODBMS: Requirements, Architecture, and Design Decisions. In Conference Proceedings on Data Engineering, 1995.
H. Branding, A. Buchmann, T. Kudrass, and J. Zimmermann. Rules in an Open System: The REACH Rule System. In Proceedings of the 1st International Workshop on Rules in Databases, Edinburgh, 1993.
B. Adelberg, H. Garcia-Molina, and B. Kao. Emulating Soft Real-Time Scheduling Using Traditional Operating System Schedulers. In the Proceedings of the Real-Time Systems Symposium, San Juan, 1994.
J. Case, K. McCloghrie, M. T. Rose, and S. L. Waldbusser. Introduction to Version 2 of the Internet-standard Network Management Framework. Technical Report, RfC 1441. SNMP Research Inc., 1993.
International Standard Organization. ISO/IEC/IS 7498-4, Information Processing: Open Systems Interconnection — Basic Reference Model — Part 4: Management Framework. 1989.
S. Chakravarthy, B. Blaustein, A. Buchmann et al. HiPAC: A Research Project in Active, Time-Constrained Database Management. Final Tech. Report, Xerox Advanced Information Technology, 1989.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1996 British Computer Society
About this paper
Cite this paper
Branding, H., Buchmann, A.P. (1996). On Providing Soft and Hard Real-Time Capabilities in an Active DBMS. In: Berndtsson, M., Hansson, J. (eds) Active and Real-Time Database Systems (ARTDB-95). Workshops in Computing. Springer, London. https://doi.org/10.1007/978-1-4471-3080-2_10
Download citation
DOI: https://doi.org/10.1007/978-1-4471-3080-2_10
Publisher Name: Springer, London
Print ISBN: 978-3-540-19983-0
Online ISBN: 978-1-4471-3080-2
eBook Packages: Springer Book Archive