但是问题是，我们如何设计这个数据服务层？
But the question is how can we design this Data Service Layer? Fred sees 3 different possibilities.
作为所有企业数据存储的单一入口点，实现数据服务层的好处很多。
As a single entry point to all enterprise data stores, the implementation of a data service layer has many benefits.
其中软件体系包括了用户界面层、页面服务器层、应用服务群层和数据服务层；
The software architecture consists of Customer Interface Layer, the Page Service Layer, Applied Interface Layer and the Data Service Layer.
要提高安全性，我们建议您在数据层安装索引数据服务。
To improve security, we recommend that you install the index data service in the data layer.
我们建议您在数据层安装索引数据服务。
We recommend that you install the index data service in the data tier.
因此，从概念上讲，DSL解决方案包括两个逻辑层：数据服务编排层(此层支持所引用的系统进程)和数据集成层。
So, conceptually, a DSL solution includes two logical tiers: a data services orchestration tier that supports the referred to system process and a data integration tier.
在数据服务编排层，缓存由专门的数据缓存服务提供支持。
At the data services orchestration tier, caching is supported by a specialized data caching service.
企业数据服务有效地创建了一个抽象层，使业务功能避开数据存取细节。
Enterprise data services effectively create abstraction layer, shielding business functionality from the data access details.
数据服务器层是数据网格的组成部分，通过在内存中缓存对象来缓冲数据库访问，以实现更高的性能。
Data Server tier, part of data Grid, buffers database access by caching objects in-memory for higher performance.
例如，仅仅检索或更新数据的数据服务操作如果没有应用业务逻辑，那么不应该允许直接从Channelservices层调用。
For example, data service operations that merely retrieve or update data, without the application of business logic should be permitted to be called directly from the Channel Services layer.
如果没有要求更改错误，则UDP提供不可靠的数据服务，从而增加网络在传输层的吞吐量。
When error correction is not required, UDP provides unreliable datagram service that enhances network throughout at the host-to-host transport layer.
在无线传感器网络、基站和数据服务器三层结构的基础上讨论基于谓词的水质达标采样算法，对算法进行分析、设计和仿真。
Based on a three-level structure of WSN, base station and data server, water attainment sampling algorithms by predicate are designed and simulated.
在无线传感器网络、基站和数据服务器三层结构的基础上讨论基于谓词的水质达标采样算法，对算法进行分析、设计和仿真。
Based on a three-level structure of WSN, base station and data server, water attainment sampling algorithms by predicate are designed and simulated.
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