It can be believed that the distributed database can satisfy the needs of the separated corporation structure , be a substantial basis to improve the efficiency of the work and create more profit 事实证明分布式数据库系统能够满足企业分散结构的需要，对企业提高工作效率，创造更高的价值奠定了坚实的基础。
With the need for the computer application and computer hardware expanding more and more widely , especially with the network technology more and more mature , the distributed database system is developing swiftly 随着计算机应用需求的拓展和计算机硬件特别是网络技术的日趋成熟，分布式数据库系统迅速发展起来。
Among these parts , the realization of the restoration sub - system is a very complicated process . meanwhile , it is also a very important and necessary part of the distributed database system 其中，分布式数据库系统中的恢复子系统的实现是一个非常复杂的过程，同时也是分布式数据库中的一个不可缺少的重要组成部分。
Because distributed database system is not the simple combination of internet and database system , it is difficult to realize and there is not real distributed database system for commercial use now 由于分布式数据库系统并不是网络技术与集中式数据库系统的简单结合，它的实现难度极大，现今还没有真正的商用分布式数据库系统。
Directory service is a data - storage technology , which is completely different with dbs , especially in the mode of data - storage , the structure of distributing and the mode of visiting data 目录服务作为一种日益引起业内重视的新型数据存储技术，它的数据存储方式、分布式的构造方式以及数据访问方式与分布式数据库系统有很大区别。
With the enterprise ' s structure more and more separated , intensive database has not satisfied the need of the users any longer . and the technology of the distributed database will become the role 随着企业结构的逐步分散化，集中式的数据库系统已经越来越难以满足企业信息管理的需要，分布式数据库系统将成为信息管理系统的主流技术。
Based on the deep - going exploration of the distributed data system , the backup and the log - file technology , this article puts forwards a data restoration method on the basis of two - phase commit protocol 本文在对分布式数据库系统深入探讨的基础上，基于备份和日志记录技术，提出了一种基于两阶段提交协议的分布式数据库系统的数据恢复方法。
Security management is one of the important aspects of a database application system . regarding the practical system , a security management system of a distributed database system is designed and implemented in the thesis 安全管理是数据库应用系统的重要组成部分，本论文结合实际的应用系统，设计和实现了一个分布式数据库系统的安全管理子系统。
Because the composite system is built on the base of different and distributing database , the author studies the difference of application in system integration between activex / dcm , corba and java / rmi 针对信息资源共享体系是建立在异构分布式数据库系统上的，文章还探讨了activex dcom 、 corba和java rmi三种分布式技术应用在系统集成方面的优缺点。
In addition , distributed database system contains more complex contents than centralized database system . this essay aims to research on the principle , design and realization technology of oracle distributed database system 另外，在查询处理、事务管理、数据的完整性与安全性等方面，分布式数据库系统比集中式数据库系统具有更复杂、更丰富的内容。
