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Research on Distributed Network Operating System based on Object Oriented Approach.

基于面向对象方法的分布式网络操作系统研究。

基本信息

批准号：
61460133
负责人：
MIYAHARA Hideo
金额：
$ 1.28万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61460133/
关键词：
object oriented approach distributer system network operating system ブロードキャスト UNIX

项目摘要

The goal of this project is to develop an distributed network operating system which provide the basic facility spread out on network to use computers,printers file servers,etc without knowing where they are and how they are dealt with. Toward this goal,we are developing O^2NE(Object Oriented Network Environment).O^2NE provide the unified object oriented interface to all resources on network such as files,printers,programs and workstations. That is,all resources behave like an object which can be activated and controlled by messages. O^2NE provide two kinds of transparency to users and developers of network wide application.1) transparency of network location:The location of each object is managed by a server. The user can make use of each object only by its name provided by the user.2)transparency of parallelism: The user can order and run many jobs simultaneously without any special treatment.Two server processes under UNIX operating system,metaclass server (MCS) and object shell (objsh), provide the network environment. Objsh provides the user interfaces where a user can send messages to all the objects in the network through MCS. The descriptions of an object,class,are stored in the class dictionary by a hierarchical manner. MCS exists on each machine connected to the network and manage all object in his machine and generates or terminate them. MCS also sends messages from the objects on his machine to the one residing on the other machine.

这个项目的目标是开发一个分布式网络操作系统，提供基本的设施，分散在网络上使用计算机，打印机，文件服务器等，而不知道他们在哪里，以及如何处理。为了实现这一目标，我们正在开发O^2NE（Object Oriented Network Environment，面向对象的网络环境），O^2NE为网络上的所有资源，如文件、打印机、程序和工作站提供统一的面向对象的接口。也就是说，所有资源的行为都像一个可以通过消息激活和控制的对象。O^2NE为网络应用的用户和开发者提供了两种透明性：1）网络位置透明性：每个对象的位置由服务器管理。2）并行性的透明性：用户可以同时订购和运行多个作业，而不需要任何特殊处理。UNIX操作系统下的两个服务器进程：元类服务器（MCS）和对象外壳（objsh）提供了网络环境。Objsh提供了用户界面，用户可以通过MCS向网络中的所有对象发送消息。对象类的描述以层次化的方式存储在类字典中。MCS存在于连接到网络的每台机器上，并管理其机器中的所有对象，并生成或终止它们。MCS还将消息从其机器上的对象发送到驻留在另一台机器上的对象。