数据存储层由所有的存储数据仓库组成。
The data persistence layer comprises all the persistent data stores.
NET开发方式的应用表示层、业务逻辑层、数据访问层和数据存储层四层结构。
NET exploiture method: application expression layer, operation logic layer, data interview layer and data storage layer.
用户界面有一些小改动，如每个选项卡上的关闭按钮；后端的改进，比如书签和历史记录的SQLite数据存储层。
There were little user interface changes like a close button on each tab, and back-end improvements like a SQLite data storage layer for bookmarks and history.
分析和研究了ODS层的理论，并通过操作数据存储层的引入实现减轻业务系统负担和为数据仓库系统提供一个统一的数据环境的目的。
It analyses and studies the theory of ODS. It also achieves the goal of lightening the burden of business system and providing a unified data environment through the use of ODS.
因此，我们需要在数据层中提供可变性，以便能够为一家银行存储客户国籍，但另一家银行却不需要如此。
Therefore we need to provide variability in the data layer so we can store the nationality of the customer for one bank but not require it for the other.
相应的种类数据存储在eis层的RDBMS中。
Corresponding categories data is stored in an RDBMS at the EIS tier.
新的XML存储和查询环境如何操作应用程序层的XML数据模型？
How the new XML storage and query environment plays into the XML data model of the application tier?
您的ejb层应当是无状态的服务，该服务由无状态的会话bean来负责管理，所以不能存储用户的数据，如用户名或密码。
Your EJB layer should be a stateless service fronted by a stateless session bean, so it cannot store user data such as a username or password.
表空间在数据库与存储在数据库中的表之间提供了一个间接层。
A tablespace provides a level of indirection between a database and the tables stored within the database.
例如，在数据存储库层，登台数据库和存储库数据库可以在不同的服务器上、在同一服务器上或者甚至在不同模式下的同一数据库中。
For example, in the data repository tier, staging and repository databases can be on different servers, on the same server, or even in the same database under different schemas.
为了估计工作项的状态，我们需要使用全局变量，来将数据与工作项目存储在同一层次。
To calculate status of a work item, we need to use global variables to store the data and the work item in the same level.
数据集市层包含所有的数据集市，这些数据集市是数据存储库模块的子集，以便特定的终端用户组在其数据分析活动中使用起来足够简单。
The data mart tier contains all the data marts, which are subsets of the data repository module, made simple enough for specific groups of end users to use in their data analysis activities.
该层的作用在于针对不同的数据存储技术，从业务逻辑中分离数据访问代码。
The power of this layer is in separating data access code from the business logic for disparate data store technologies.
DMS总是以同一种格式(数据图)返回信息，它隐藏了实际的数据存储信息，在SDO应用程序和EIS之间提供了一层数据提取的功能。
As a DMS always returns the information in the same format (a data Graph), it hides the actual data storage and provides a level of abstraction between the SDO application and the EIS.
最后，数据访问层是持久化的数据存储，比如数据库或文件存储。
Finally, the data access layer is a persistent data store, such as a database or file storage.
在该模型中，业务数据仓库是数据存储库数据库(模块)的集合，而数据集市则是数据集市层中的数据库。
In this model, the business data warehouse is the collection of data repository databases (module), and the data marts are the databases from the data mart tier.
该层包括存储的元数据内容。
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.
数据库层用于存储所有应用程序数据。
The database layer is used for storage of all application data.
第二种数据存储用于潜在的消息传递层，它需要稳定的内部消息数据格式。
The second is for the underlying messaging layer that requires persistence of the internal message data format.
数据访问层提供了一种语义数据存储、一个用户个人文件以及规则数据库。
The data access layer provides a semantic data store, a user profile, and the rules database.
数据访问层负责对存储在企业信息系统(EIS)中的数据进行存取等操作。
The data access layer is responsible retrieving and manipulating data stored in enterprise information systems (EISs).
数据存储库层，或后端层包含了所有的人工模型组件和完整的模型结构，它们处理所有必要数据源中的集成业务数据。
The data repository tier, or back-end tier, comprises all of the model artifacts and the full structure of the models, which handle integrated business data from all required data sources.
如今，很多应用程序的数据库层都设计为存储过程。
Many applications nowadays design their database layer as stored procedures.
各种应用运行在被创建的虚拟服务器上，创建的虚拟存储池用于把新建的和现存的数据存储到动态存储层，动态存储层是基于性能和可靠性要求的。
Virtual servers are created to run applications, and virtual storage pools are created to house new and existing data into dynamic tiers of storage based on performance and reliability requirements.
创建假的数据层是一种有用的用户界面开发实践，因为最终应用程序要使用的持续存储层对于前端开发人员来说，通常是看不到的。
Creating a fake data layer is a useful UI development practice because the persistence layer to be used by the final application is often unavailable to front-end developers.
数据操作服务(在下方的层中)从物理存储库中提取数据，并且语义服务将该数据转换为信息。
The data manipulation services (in the lower layer) extract data from the physical repositories, and semantic services turn this data into information.
SAP系统可以处理存储业务数据并提供流程层以便与数据一起工作。
SAP systems take care of storing business data as well as providing the process layer to work with that data.
用户交互层：用户交互层让用户可以与应用程序交互(例如，显示数据库中存储的信息)。
User interaction: the user interaction layer allows a user to interact with an application (for example, visualizing information stored in the database).
我执行读取操作的顺序是从web层获取请求(需要执行一次数据库查询)并检查之前在缓存中存储的查询结果。
The sequence I follow when performing reads is to take a request (that requires a database query) from the Web tier and check the cache for previously stored results of that query.
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