Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps Información técnica descargar pdf (Pagina 48)

34 MetaFrame Solutions Guide

As a general rule, follow the application guidelines below when selecting or

developing applications:

Win32 (32-bit) applications are preferred over Win16 (16-bit) applications.

Windows 2000 with Terminal Services runs Win16 applications through a

process called Win16 on Win32 (WOW), which causes Win16 applications to

have higher processor requirements than comparable Win32 applications.

The Windows Ini files must be accessed using the proper Windows NT APIs.

This is needed so the Ini file synchronization features of Windows 2000 will

work properly.

Applications (mostly DOS applications) that poll a hardware device or the

keyboard rather than waiting for an event can have an adverse effect on system

performance. The DOSKBD command can be used to tune DOS applications

that perform excessive keyboard polling.

Use the Windows NT APIs instead of custom coding whenever possible. Many

Windows NT APIs have Citrix MultiWin enhancements to seamlessly support

a multiuser environment.

Avoid hard coding of paths and network identifiers.

NetWare applications must be able to run in bindery mode.

DOS graphics are not supported on ICA connections.

Avoid using bitmaps in graphics; use vector-based graphics instead. Use the

raster operator to “brush” graphics on the screen for best performance on an

ICA device.

VxDs are not supported in a Windows NT environment.

When developing Win32 applications, make sure that the Dlls do not have to

be moved in memory; instead, use fixed Dll addresses. The Windows NT SDK

includes tools to help with this.

The following sections discuss some of these guidelines in greater detail.

Application Installation and Configuration

In a multiuser environment such as MetaFrame, it is essential that all users be able

to make use of the same applications concurrently without interfering with each

other’s preference settings or data.

The first and most important step is to assign each user a unique home directory;

for example, C:\Users\%Username%. If no home directory is assigned, the system

assigns the default local home directory to the user account (the root directory) on

the server’s local drive where Windows 2000 is installed as an upgrade or the

\Documents and Settings\%Username% directory where Windows 2000 is

installed as the initial version). Windows 2000 is also equipped with a desktop

folder called My Documents, which offers an alternative to home directories but

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Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps Información técnica Pagina 48