Design and Implementation of a Distributed Operating System

点击翻译按钮获取中文摘要

The distributed operating system Theta has been developed with the aim to support applications on distributed systems. Generally, operating systems handle many and various kinds of data structures, so their description has become complex and difficult. Using object oriented techniques and, by the abstraction of the system, their description and production are improved. The efficiency of a new version of Theta described by C++ and COB, with object oriented techniques, has been compared with its previous C version. The first aim of this research is to evaluate results of such comparison.Concurrency and reliability are main issues of the distributed systems. Conventional distributed operating systems have been concerned only with concurrency. This is due to the fact that operating systems have not been used in distributed environments. On the other hand, distributed database systems had improved reliability. The second aim of this research is to apply those techniques to an operating system. Firstly, operating system is represented by objects. Secondly, those objects are realized by persistent objects. Thus the operating system can be composed by persistent objects, and persisteny operating system may be realized.