Added to this mix is the open source database success of MySQL in the data tier.
在这个组合之上，还可以用开放源码数据库MySQL建立数据层。
End-to-end performance is improved as there are no copies of the data made between the database (or other XML data source) and the middle tier.
端到端性能得到改进，原因是不需要在数据库(或其他XML数据源)和中间层之间创建数据副本。
The project's design ideas clear for data source - operational data store - model three-tier architecture;
该项目的设计思路明确为采用数据源—操作型数据存储—模型的三层体系结构；
The project's design ideas clear for data source - operational data store - model three-tier architecture;
该项目的设计思路明确为采用数据源—操作型数据存储—模型的三层体系结构；
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