持久性数据存储的速度和大小。
这些关系图驱动持久性数据。
用户如何看到持久性数据？
持久性数据大约保留多久。
在样例应用程序中，文件系统用作持久性数据存储。
In the sample application, the file system is used as the persistent data store.
确切地说，客户查询持久性数据的方式可以所有不同。
Exactly how persistent data is queried by a client can vary.
最简单的访问持久性数据的方法是使用find方法。
The simplest way to access persistent data is by using the find method. Here is an example of an application using the entity manager to find an object by its primary key.
执行操作通常会导致读、写或修改一个或多个持久性数据。
Execution of an operation will typically cause one or more persistent data records to be read, written, or modified.
数据——提供对持久性数据和其他外部数据的访问的组件。
Data — Components that provide access to persistent and other external data.
原因在于该映射使得应用程序与持久性数据存储方案之间的耦合变得太过紧密了。
The reason is that this mapping exposes and couples the application too closely to the persistent data store's schema.
EDM通常用作信息集成的参考模型，或者用作持久性数据库和数据仓库的基础。
EDM is often used as a reference model for information integration or as a basis for persistent databases and data warehousing.
数据清理模式指定有关如何在输入时或稍后提高持久性数据的数据质量的建议性实践。
The data cleansing pattern specifies a recommended practice for how to improve the data quality of persistent data either at entry or later.
所有的J2EE持久化技术都提供了一些机制来将业务数据对象映射回持久性数据源。
All J2EE persistence technologies provide some mechanism to map business data objects back to a persistent data source.
注意，这一开发场景需要使用Hibernate将已有持久性数据表示成基于对象的视图。
Note that this development scenario involves using Hibernate to present an object-based view of existing persistent data.
一旦持久性数据传入图中，与管理持久性数据有关的其他问题就变得非常重要，包括下面这些问题。
Once persistent data is introduced into the picture, other issues related to the management of that persistent data become very important, issues such as the following.
VisualDashboard是一种可视化项目，可以为广泛的用户显示交互式或持久性数据。
Visual Dashboard is a type of visual project that presents interactive or persistent data to a wide range of users.
但是，当一个Web服务需要维护持久性数据(比如，成为一个有状态的Web服务)时，事情就变得有点复杂了。
But, when a Web service wants to maintain persistent data (for example, become a stateful Web service) things become a little more complex.
例如，假设您并不想对属性名和字符串模式进行比较，而只是想查明具有该属性名的属性是否一直保存在持久性数据库中。
For example, perhaps you do not simply want to compare the attribute name to a string pattern, but actually look up whether the name is an attribute that has been stored in a persistent database.
此策略的工作方式是这样的：可以通过ESB使某些数据（静态数据或变化不频繁的数据）变为持久性数据或可缓存数据。
The strategy works like this: You can make certain data, either static or that which changes infrequently, persistent or cacheable through the ESB.
简而言之，Grid基础结构提供了一种标准的方式，Web服务的开发人员可以用来展示持久性数据以及他们的Web服务实例，而不管它们有什么样的特定实现。
In a nutshell, the Grid infrastructure offers Web service developers a standard way of exposing persistent data and instances of their Web services regardless of their specific implementation.
数据持久性是企业开发中最棘手的一个方面。
Data persistence is one of the trickiest aspects of enterprise development.
什么是数据持久性？
这实际上意味着必须定期检查客户机缓存，查看持久性规则数据存储中的任何内容是否已经更改。
This effectively means that the client cache must check periodically to see if anything in the persistent rule data store has changed.
EII可以扩展普及的持久性框架的数据范围，并提供新的建模能力。
EII can extend the data reach of popular persistence frameworks as well as provide for new modeling capabilities.
虽然有许多处理数据持久性的好工具，但是它们需要的工作都比简单操纵内存中数据结构要多得多。
While many good tools for dealing with persistent data are available, they all involve a lot more work than simply manipulating an in-memory data structure.
数据持久性是使用最广泛的选项。
一个资源管理器是任何类型的持久性的数据存储。
作为企业数据持久性机制，实体bean有五个主要优点。
Entity beans offer five essential advantages as an enterprise data persistence mechanism.
persistent类旨在使数据持久性变得简单。
实体bean，它提供健壮的数据持久性。
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