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      Concurrency Control in Distributed Object-Oriented Database Systems

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      Proceedings of the First East-European Symposium on Advances in Databases and Information Systems (ADBIS)

      Advances in Databases and Information Systems

      2-5 September 1997

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          Abstract

          Simulating distributed database systems is inherently difficult, as there are many factors that may influence the results. This includes architectural options as well as workload and data distribution. In this paper we present the DBsim simulator and some simulation results. The DBsim simulator architecture is extendible, and it is easy to change parameters and configuration. The simulation results in this paper is a comparison of performance and response times for two concurrency control algorithms, timestamp ordering and two-phase locking. The simulations have been run with different number of nodes, network types, data declustering and workloads. The results show that for a mix of small and long transactions, the throughput is significantly higher for a system with a timestamp ordering scheduler than for a system with a two-phase locking scheduler. With only short transactions, the performance of the two schedulers are almost identical. Long transactions are treated more fair by a two-phase locking scheduler, because a timestamp ordering scheduler has a very high abort rate for long transactions.

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          Fine-grained sharing in a page server OODBMS

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            Parallelism and concurrency control performance in distributed database machines

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              Author and article information

              Conference
              September 1997
              September 1997
              : 1-15
              Affiliations
              Department of Computer and Information Science

              Norwegian University of Science and Technology

              Trondheim, Norway
              Article
              10.14236/ewic/ADBIS1997.32
              © Kjetil Nørvåg et al. Published by BCS Learning and Development Ltd. Proceedings of the First East-European Symposium on Advances in Databases and Information Systems, (ADBIS'97), St Petersburg

              This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

              Proceedings of the First East-European Symposium on Advances in Databases and Information Systems
              ADBIS
              1
              St Petersburg
              2-5 September 1997
              Electronic Workshops in Computing (eWiC)
              Advances in Databases and Information Systems
              Product
              Product Information: 1477-9358BCS Learning & Development
              Self URI (journal page): https://ewic.bcs.org/
              Categories
              Electronic Workshops in Computing

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