分布式dbms的概念与设计------外文翻译.doc
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分布式dbms的概念与设计------外文翻译,1 介绍推动数据库系统发展的一个主要因素是,人们希望将一个企业的操作数据综合起来并能提供对数据的受控访问,经管综合和受控访问意味着集中管理,但这并不是目的。实际上,计算机网络的发展促进了分散式的作业模式。这种分散的方式反映了许多公司的组织结果:在逻辑上分成多个分公司,部门,项目等,而在体制上分为办公室,车间,工厂,每一...
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1 介绍
推动数据库系统发展的一个主要因素是,人们希望将一个企业的操作数据综合起来并能提供对数据的受控访问,经管综合和受控访问意味着集中管理,但这并不是目的。实际上,计算机网络的发展促进了分散式的作业模式。这种分散的方式反映了许多公司的组织结果:在逻辑上分成多个分公司,部门,项目等,而在体制上分为办公室,车间,工厂,每一个单元都维护着自己的操作数据。数据的共享和数据访问效率的提高以来与分布式数据库系统的发展,分布式数据库反映了上述组织结构,使得每个单元的数据都是可访问的,并将最近的数据存放于最常用的位置。
分布式DBMS有助于结局信息孤岛的问题,有时,数据库被看做是孤立的,不可访问的电子岛,就像遥远的岛屿一样。这可能是由于地理分割,计算机体系结构不兼容或通信协议不兼容原因造成的。把数据库综合成一个逻辑整体可能会改变这种思考的方式。
1. INTRODUCTION
A major behind the development of database systems is the desire to integrate the operational data of an organization and to provide controlled access to the data. Although integration and controlled access may imply centralization, this is not the intention. In fact, the development of computer networks promotes a decentralized mode of work. This decentralized approach mirrors the organizational structure of many companies, which are logically distributed into divisions, departments, projects, and so on, and physically distributed into offices, plants, factories, where each nit maintains its own operational data. The shareability of the data and the efficiency of data access should be improved by the development of a distributed database system that reflects this organizational structure, makes the data in all units accessible, and stores data proximate to the location where it is most frequently used.
推动数据库系统发展的一个主要因素是,人们希望将一个企业的操作数据综合起来并能提供对数据的受控访问,经管综合和受控访问意味着集中管理,但这并不是目的。实际上,计算机网络的发展促进了分散式的作业模式。这种分散的方式反映了许多公司的组织结果:在逻辑上分成多个分公司,部门,项目等,而在体制上分为办公室,车间,工厂,每一个单元都维护着自己的操作数据。数据的共享和数据访问效率的提高以来与分布式数据库系统的发展,分布式数据库反映了上述组织结构,使得每个单元的数据都是可访问的,并将最近的数据存放于最常用的位置。
分布式DBMS有助于结局信息孤岛的问题,有时,数据库被看做是孤立的,不可访问的电子岛,就像遥远的岛屿一样。这可能是由于地理分割,计算机体系结构不兼容或通信协议不兼容原因造成的。把数据库综合成一个逻辑整体可能会改变这种思考的方式。
1. INTRODUCTION
A major behind the development of database systems is the desire to integrate the operational data of an organization and to provide controlled access to the data. Although integration and controlled access may imply centralization, this is not the intention. In fact, the development of computer networks promotes a decentralized mode of work. This decentralized approach mirrors the organizational structure of many companies, which are logically distributed into divisions, departments, projects, and so on, and physically distributed into offices, plants, factories, where each nit maintains its own operational data. The shareability of the data and the efficiency of data access should be improved by the development of a distributed database system that reflects this organizational structure, makes the data in all units accessible, and stores data proximate to the location where it is most frequently used.