Skip to main content

Exploring parallelism with object oriented database management system

Fathy, Sherif Kassem (1991) Exploring parallelism with object oriented database management system. Doctor of Philosophy (PhD) thesis, University of Kent. (doi:10.22024/UniKent/01.02.94340) (KAR id:94340)

Language: English

Click to download this file (75MB) Preview
[thumbnail of 280322.pdf]
This file may not be suitable for users of assistive technology.
Request an accessible format
Official URL:


The object oriented approach to database management systems aims to remove the limitations of the current systems by providing enhanced semantic capabilities and more flexible facilities, including the encapsulation of operations as well as data in the specification of an object. Such systems are certainly more complex than existing database management systems. Although, they are complex, the current object oriented database management systems are built for Von-Neumann (purely sequential) machines. Such implementation inevitably leads to major problems involving efficiency and performance. So, new techniques for implementation need to be investigated. One possible solution for the efficiency, and performance problems is to use parallel processing techniques. Thus, the aim of this research is to propose aspects in which parallel processing can be introduced within the scope of object oriented database management systems and identify ways in which the performance can be improved. A prototype of the main components of an object oriented database system called KBZ has been implemented to test out some of the parallel processing aspects. The thesis starts with an introduction and background to the research. It then describes major parallel system architectures for an object oriented database management system. Techniques such as distributing a large volume of data among various processors (transputers), performing processing in the background of the system to reduce response time, and performing input/output parallel processing are presented. The initial prototype, PKBZ version-1, is then described; in particular, the logical and physical representation of object classes, how they communicate through message sending, and the different types of message supported. Two prototype versions exist. The initial prototype was designed to investigate the parallel implementation and general functionality of the system. The second version provides greater flexibility and incorporates enhanced functionality to allow experimentation. The enhancements in the second version are also discussed in the thesis, and the experimental results using different transputer configurations are illustrated and analyzed.

Item Type: Thesis (Doctor of Philosophy (PhD))
DOI/Identification number: 10.22024/UniKent/01.02.94340
Additional information: This thesis has been digitised by EThOS, the British Library digitisation service, for purposes of preservation and dissemination. It was uploaded to KAR on 25 April 2022 in order to hold its content and record within University of Kent systems. It is available Open Access using a Creative Commons Attribution, Non-commercial, No Derivatives ( licence so that the thesis and its author, can benefit from opportunities for increased readership and citation. This was done in line with University of Kent policies ( If you feel that your rights are compromised by open access to this thesis, or if you would like more information about its availability, please contact us at and we will seriously consider your claim under the terms of our Take-Down Policy (
Uncontrolled keywords: Computer software; programming
Subjects: Q Science > QA Mathematics (inc Computing science) > QA 76 Software, computer programming,
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing
SWORD Depositor: SWORD Copy
Depositing User: SWORD Copy
Date Deposited: 24 Jan 2023 15:23 UTC
Last Modified: 24 Jan 2023 16:08 UTC
Resource URI: (The current URI for this page, for reference purposes)
  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.