There are three DDBMS architectures-loose coupling,tight coupling and integrat,which will be dis- cussed in the section 2.

• 本文讨论了三种 DDBMS 组成方式:松散结合型(loose cou-pling)、紧密结合型(tight coupling)和集成型(integrat),并对它们的优缺点进行了分析。