An Organization of Distributed Computer System for Computer Education

在高校计算机程序设计课堂中，TSS环境中通常使用大型机，但由于学生和/或班级的增加，计算机的响应速度变慢，针对这一问题，本研究考虑使用分布式计算机系统进行教育。本研究的目的是提出一种分布式环境的组织方法。研究结果概括如下：1.为了在分布式环境中获得最大的性能，必须满足以下条件：(1)客户端工作站的主内存必须安装充足。(2)每个网段连接的工作站不超过10台。并且客户端的内存大小比连接本地磁盘进行交换更有效。为了改善Unix操作系统的用户界面，我们开发了一个面向初学者的文本编辑器。在编辑器中嵌入了收集用户类型脚本的功能，并分析了初学者在编程中的行为。所获得的数据不仅对编辑人员的改进有用，而且对编程教育也有帮助。个人计算机通常用作主计算机的终端。为了使用个人计算机作为Unix的终端，我们开发了一个显示Unix图形输出的界面。此外，我们还考虑了X服务器程序在个人计算机上的性能。

In computer programming class of universities, mainframes are usually used in TSS environment.However, response of the computer becomes slow because of increasing students and/or classes.To cope with the problem, this research considers the use of distributed computer system for education. The objective of the research is to propose an organization method of a distributed environment. Results of the research can be summarized as follows :1. In order to obtain maximal performance in distributed environment, the following conditions must be satisfied.(1) Main memory of client workstation must be installed sufficiently.(2) Each network segment is not connected to no more than 10 workstations.And more memory size of the clients is effective than connecting local disk for swapping.2. In order to improve user interface of Unix operating system, we develop a text editor for beginners. Function of collecting type script of users is embedded into the editor, and we analyze behavior of beginners in programming. Data obtained are useful not only for improvement of the editor but also for programming education.3. Personal computers are generally used as terminals of host computers. For use of personal computers as terminals of Unix, we developed an interface to display graphical output from Unix. Moreover we consider the performance of X server program for personal computers.