这是因为JPA规范对持久性上下文的管理实例施加的了一个类似组的行为。
It's because the JPA specification imposes a group-like behavior on the managed instances of a persistence context.
例如，同一台计算机上的三个实例就需要三组后台进程。
For example, three instances in one machine will require three set of background processes.
每个资源组将包含一个启动和停止该实例的脚本。
Each resource group will contain a script to start and stop that instance.
这些其他实例可以转而尝试从目的地接收其他组。
Instead, these other instances can be attempting to receive other groups from the destination.
每个实例都需要其自己的卷组。
然而，类图提供结构图类型的一个主要实例，并为我们提供一组记号元素的初始集，供所有其它结构图使用。
However, the class diagram offers a prime example of the structure diagram type, and provides us with an initial set of notation elements that all other structure diagrams use.
创建一个流调试器实例，将其附加到默认执行组上，随后启动流调试器。
Create a flow debugger instance, attach it to the default execution group, and then start the flow debugger.
这简化了集群内的连通，我们可以通过组或者实例名来定位集群、套接字和消息通道。
This simplifies connectivity within the cluster, the cluster, socket, and message channels are simply addressed by the group or instance name.
这样的逻辑同样适用于实例共享内存和应用程序组共享内存。
Same logic applies to the instance Shared memory and the application group Shared memory.
该特性提供了一个简洁的方法，用之表述一组实例，以在运行中的单个测试用例中使用。
This feature gives you a succinct way to express a set of examples to be used in running individual test cases.
这意味着在同一数据库实例中必须有两组表格。
This means both sets of tables have to live in the same database instance.
新的实例位于当前的根卷组（例如，相同的磁盘）中。
The new instance is housed within the current root volume group (for example, the same disks).
每个实例通常都要求使用一组惟一的配置参数才能使应用程序正常运行。
Each instance typically requires a unique set of configuration parameters for the application to work properly.
多分区数据库分区组只能用属于相同实例的数据库分区来定义。
Multi-partition database partition groups can only be defined with database partitions that belong to the same instance.
每个实例一个资源组。
BICS实例文档包含一组约束结构，其类型依赖于具体的约束机制。
BICS instance documents contain a set of constraint structures, which are typed according to concrete constraint mechanisms.
因此，该插件自动从数据库中检索一组示例XML文档实例(见图5，序号2)。
Therefore, the plugin automatically retrieves a set of sample XML document instances from the database (see Figure 5, Number 2).
事件对象现在扩展了一组实例方法。
Event objects are now extended with a collection of instance methods.
接下来的范例显示了位于程序单个实例之上的两组程序。
The following example shows a cluster of two application servers that are hosting a single instance of an application.
实例变量分为五组。
SecurityIncidentCoopA访问远程业务流程和检索安全事故人工任务的一组就绪或活动实例。
SecurityIncidentCoopA accesses the remote business process and retrieves a list of ready or otherwise active instances of security incident human tasks.
SecurityIncidentPortlet访问远程业务流程和检索安全事故任务的一组就绪或活动实例。
SecurityIncidentPortlet accesses the remote business process and retrieves a list of ready or otherwise active instances of security incident tasks.
EMFTQuery是一种帮组转移eMF模型实例的框架。
EMFT Query is a framework to help traversal of EMF model instances.
要维护“tam”实例的用户和组信息，可以添加一个高级的后缀。
To maintain 'tam' instance user and group information, add a high-level suffix.
RmmRxConfig结构对于创建一个RMM接收器实例是一组必须参数。
The RmmRxConfig structure is a set of parameters required to create an RMM receiver instance.
两个函数都要求提供的模式文档声明或定义要测试的实例元素，以及代替组head元素或引用类型。
Both functions require that the provided schema documents declare or define the instance element to be tested and the substitution group head element or the referenced type.
下面是一组代码实例，显示了如何处理userdefinedpushdownmethodsimpl类中的各种形式的返回值。
Below is a set of code examples that show how to handle various forms of the return value in the UserDefinedPushDownMethodsImpl class.
其中实例和组账户分别是bcuinst2和db2igrp。
Where the instance and group accounts are bcuinst2 and db2igrp.
理论上，一个实例可以属于多个组(这还没有被正式地测试)。
In theory, a instance could belong to multiple groups (this hasn't been formally tested.)
它并不执行用户和组创建、实例创建或配置。
It does not perform user and group creation, instance creation, or configuration. To start an installation using db2_install, follow these steps.
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