最后，客户机要访问哪些大型机？
对大型机的持续连接是必要条件。
虚拟化技术最早始于大型机的时代。
Virtualisation dates back to the age of mainframe computers.
TSO是一种与大型机交互的方式。
现代大型机出现在1964年。
现在，大型机产品的变化也非常快。
Today, mainframe products are also changing very fast. For example.
大型机程序可以随时参与复杂的工作流。
Mainframe programs can readily participate in complex workflows.
每次访问大型机都需要单独的函数调用。
A separate function call was required each time the mainframe was accessed.
难道就没有与大型机通信的更好方式吗？
Shouldn't there be a better way to communicate with the mainframe?
安装大型机和桌面软件。
大型机的软件许可证和维护费用非常昂贵。
Software licenses and maintenance fees are expensive on mainframes.
大型机开发的常见障碍。
大型机的soa策略。
首先出现的是大型机。
解放大型机开发MIPS以满足生产能力需求。
在我们的这种场景下，针对大型机根本没有外来技术。
In our scenario, there were no foreign technologies at all on the mainframe.
应用程序的订购模块包括来自大型机的客户详细信息。
The order module of the application obtains customer details from the mainframe.
这些可能包括大型机应用程序、分布式应用程序等等。
These may include mainframe applications, distributed applications, and so on.
COBOL和大型机应用程序将在很长时间内继续存在。
COBOL and mainframe applications will be around for a long time to come.
数据库专家无疑会惊骇于这种向大型机历史的明显倒退。
Database mavens will no doubt be aghast at this apparent retrograde into mainframe history.
IT组织在大型机领域面临的挑战是复杂的、多方面的。
The challenge that IT organizations are facing in the mainframe arena is complex and multifaceted.
大多数500强企业的应用程序和数据都由大型机托管。
Most Fortune 500 companies have many applications and data hosted in mainframes.
大型机并不需要知道它在跟一个非大型机平台交换数据。
The mainframe does not need to know that it is talking to a non-mainframe platform.
它可以运行在从大型机到普通的计算设备等多种平台之上。
It also runs on platforms ranging from mainframes to pervasive computing devices.
我们真的能够在PC中模拟大型机操作系统及其所有组件吗？
Can we really emulate a mainframe operating system and all its components in a PC?
对分布式服务而言，大型机cobol程序是高度松耦合的。
Mainframe COBOL programs are effectively loosely coupled to distributed services.
在实际企业环境中，大型机应用程序帧听的队列可能已经存在。
In a real enterprise, the queue that the mainframe application listens on would probably already exist.
随着分布式应用重要性的日益显现，大型机应用不再相互孤立。
As the importance of distributed applications grows though, mainframe applications cannot stay isolated any longer.
实际上，模拟大型机的实际开销可能超过了CPU周期的节省。
Emulating a mainframe could in fact cost more than the savings with the CPU cycle.
我们看到过这种方法用于支持与大型机功能的中介，如图2所示。
We have seen this approach used to support mediation with mainframe functions, as shown in Figure 2.
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