| 1. | The distributed system generally consists of several parts as follows : the user interface sub - system , the catalog management sub - system , the compiling sub - system , the distributed transaction management and cocurrent control sub - system , the data execution sub - system , the communication sub - system , the restoration system and the database 分布式数据库系统通常包括以下几个部分:用户接口子系统、目录结构管理子系统、编译子系统、分布式事务管理和并发控制子系统、数据执行子系统、通讯子系统、恢复子系统和数据库。 |