其代表性的方法有三种： （1）数据库网关（Database Gateway）：ODBC、 JDBC以及OBJECT DATA MANAGEMENT GROUP 的ODMG是标准的数据访问接口。
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The fourth part is about the modle of database gateway based on XML and the fifth part introduces the test to the modle of database gateway;
第四章介绍了基于XML数据库网关模型； 第五章测试数据库网关模型；
Compared with various DB access methods, database gateway based on ODBC is designed, so as to accomplish centralized backup of heterogeneous DBMS from one point and no configuration at backup side.
通过比较多种数据库访问方法，设计出基于odbc的数据库网关，从而实现从一点集中备份异构数据库和备份端的零配置。
Do not set the value to low because this will result in increased communication with the Partner Gateway database and will impact performance.
不要将该值设置得太低，因为这样会导致Partner Gateway数据库的通信量增加并影响性能。
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