到目前为止尚未讨论的另一个服务，是存档和删除可能不再需要的旧实例的功能。
One additional service not discussed so far is the ability to archive and prune old instances that may no longer be required.
为了使性能最大化和更加便利，目前的策略是从某一个表中提出元数据，先把一个类的实例映射到那个表上，用来初始化。
The current strategy for maximizing performance and convenience is to retrieve metadata for a particular table the first time an instance of the class that maps to that table is instantiated.
目前，最多能将一个持久性存储单元关联到一个给定实例，如图1中所示。
Currently, a maximum of one persistent storage unit can be associated to a given instance, as shown in Figure 1.
目前不支持访问数组、实例变量和对象引用。
Accessing arrays, instance variables, and object references are not supported as of now.
目前，持久性存储块的容量最大被限定在2tb，而且一次只能将一个持久性存储单元附加给一个虚拟实例。
Currently, persistent storage blocks are limited to a 2tb maximum size and a single persistent storage unit can only be attached to one virtual instance at a time.
目前大公司基础架构中存在的数据库实例已经开始使用基础架构即服务平台，并使用已有的许可协议。
The database instances that exist today in large enterprise infrastructures started with an infrastructure as a service platform using license agreements that already exist.
一个实例是Compuware的OptimalJ15，它不是开源产品，且目前只支持基于J2EE的应用程序的生成。
One example is Compuware's OptimalJ 15, which is not an open source product and currently only supports generation of J2EE-based applications.
因为SQLAzure目前有每个实例50gb的限制，因此无法水平扩展到更大的尺寸，开发者必须要使用该技术才能实现水平分区以进行应用的水平扩展。
As SQL Azure currently has a limit of 50gb per instance to scale horizontally to larger sizes, one must employ this technique of horizontal partitioning to achieve application scale-out.
目前情况下，Eucalyptus也不支持不同VM实例间的文件共享。
In its current incarnation, Eucalyptus also doesn't support sharing files among different VM instances.
目前，使用WebSphereMessageBrokerExplorer来检查一个MI代理的备用实例有一个局限性。
There is currently a limitation when using WebSphere Message Broker Explorer to examine the standby instance of an MI broker.
目前有一些已知的配置，它们在一个多处理器的机器上有多达4个archpro实例，每小时可归档~ 90,000封邮件。
As of today, there are configurations known with up to four archpro instances on one multi-processor machine, archiving ~ 90,000 mails per hour.
目前，该方法接受解析树（作为一个XPathNode对象）作为参数，并返回DFATable的实例。
The method accepts a parse tree (as an XPathNode object) as parameter and, for now, returns an instance of DFATable.
目前，只有在支持DPF的WebsphereFederationServer的实例上，才能在联邦查询中使用异步。不过，IBM希望在未来将该功能扩展到非dpf的实例上。
At present, asynchrony for federated queries is available only on DPF-enabled instances of Websphere Federation Server, although IBM hopes to extend this capability to non-DPF instances in the future.
到目前为止，看到的XForms呈现模型实例数据都是放在页面本身之中的。
So far you've seen XForms render model instance data that was inlined on the same page.
目前，HA集群准备创建 SIBus实例来使用，但是WLM 集群需要配置负载方面。
The HA cluster is now ready to have an SIBus instance created to work with, but the WLM cluster needs the workload aspects configured.
由于那些我所提到过的变化，我回顾并更新了到目前为止在本专栏中我们一直在研究的问题的样本实例，请参阅清单3。
Because of the changes I've noted, I have revisited and updated the sample instances of issues that we've been looking at so far in this column — see Listing 3.
到目前为止，我们已经了解了一个十分有限但却有用的应用aop的实例。
So far, we have looked at fairly limited, yet useful examples of applying AOP.
到目前为止，还没有实际创建连接器实例。
From here, you're not far from actually creating a connector instance.
到目前为止，示例都是使用Pipe Viewer的单一实例作为一对命令中的生成者或消费者。
So far, the examples shown employ a single instance of Pipe Viewer as the producer or consumer in a pair of commands.
decorator目前并不允许您修改类实例化本身，但是它们可以修改依附于类的方法。
Decorators do not currently let you modify class instantiation per se, but they can massage the methods that are attached to the class.
到目前为止，coLinux实例使用的是它自己的IP地址。
Binding目前已经成为一个表示两个Property实例之间绑定关系的抽象类(通常关联着两个对象)。
Binding is now an abstract class representing a binding between two Property instances (typically associated with two objects).
本文分析了目前医院信息系统面临的由于数据库膨胀所致运行效率下降的状况，并通过实例提出了解决此类问题的对策。
This paper analyzed the backward situation that the efficiency of his is decreased on account of database expanding and put forward the countermeasure to solve the problem by instance.
目前，我们正努力开发一个确保唯一性(每个实体在FlashVM中只存在一个实例)的客户端实体仓库。
We are currently working on a client side entity repository that ensures uniqueness (only one instance of each entity is present in the Flash VM).
到目前为止，我们一直都把repeat结构看作是存在于XML数据实例内并加以呈现的。
So far, we've looked at presenting repeating structures as they exist in the XML data instance.
目前，模式识别技术可以应用指纹识别、IC卡技术应用、字符识别等实例。
At present, the pattern recognition technology can be applied to fingerprint identification, IC card technology applications, such as examples of character recognition.
结合典型的具体工程实例，对目前采用的趾板设计的方法、趾板设计中应考虑的相关因素进行了较详细的讨论。
In combination of typical project case, the detail discussion on correlative factors in toe slab design and design method are carried out.
文章对我国目前出现的错误的CIP分类数据实例进行了详细的辨别分析，并提出了控制CIP分类数据错误的措施。
The article delicately analyzes many examples of the wrong classification data of CIP emerging currently in China, and brings up lots of measures that control the classification data mistakes of CIP.
针对目前反渗透技术应用中存在的问题，结合热电厂补水处理系统实例，分析说明了在许多场合下反渗透系统不仅技术上可行，而且经济合理，有着广阔的前景。
The authors discuss the economy and broad prospects of the reverse osmosis system to the existing problems in application and analyse the examples of co-generating plant.
针对目前反渗透技术应用中存在的问题，结合热电厂补水处理系统实例，分析说明了在许多场合下反渗透系统不仅技术上可行，而且经济合理，有着广阔的前景。
The authors discuss the economy and broad prospects of the reverse osmosis system to the existing problems in application and analyse the examples of co-generating plant.
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