DECwindows Motif （或） DEC Motif

DECwindows Motif （或） DEC Motif
DECwindows Motif

原始链接: https://products.vmssoftware.com/decwindowsmotif

DECwindows Motif 为 OpenVMS 系统提供了一个图形用户界面 (GUI)，采用客户端-服务器模式。与典型设置不同，DECwindows 中的 *服务器* 位于桌面端，负责图形显示，而 *客户端* 应用程序（如 DECterm）运行并向服务器发送请求。这些客户端控制用户交互的视觉界面。这种架构允许客户端和服务器位于通过网络连接的独立系统上，从而提供灵活性。 DECwindows Motif 支持多种网络传输机制，包括用于本地访问的共享内存、本地区域传输 (LAT)、DECnet 以及 TCP/IP（IPv4 和 IPv6），使其能够适应各种网络环境。基本上，它为 OpenVMS 带来了窗口系统体验，利用了 X Window System 的原理。

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A GUI to an OpenVMS system.

The DECwindows Motif software follows a client/server processing model, where the server is a single-shared process that performs operations at the request of many client processes.

In most client/server relationships, the client system is located on the desktop, while the server system resides across the network. With DECwindows Motif, as in all X Window System environments, the server system resides on the desktop and displays graphics onscreen.

The client is a process, such as a desktop application or X Window System utility, that issues X protocol requests. For example, in the DECwindows Motif environment, desktop applications (such as DECterm) and X Window System utilities (such as xlsfonts) are the clients that interact with the X display server. The client controls what appears on the display server system and generates the graphic interface with which the user interacts.

In the DECwindows architecture, as with most client/server processing models, the client and display server may reside on separate systems. These systems are connected to each other by a network transport that is essentially transparent to the user. DECwindows Motif supports the following transport mechanisms:

Local (shared memory)
Local Area Transport (LAT)
DECnet
TCP/IP (IPv4 and IPv6)