Citrix Systems Citrix MetaFrame Application for Windows 1.8 - Manual (Page 31)

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Use the performance monitoring tools supplied with Windows Terminal Server to
monitor system performance and the effects of configuration changes on system
throughput. The most important measurements for performance monitoring are the
percentage of total processor time, memory pages per second , percentage of
network utilization, and hard disk I/O rates.
A good way to estimate how many users a server can support is to measure system
performance with two to five users on the system and then scale the results. This
method has been found to yield reliable results.
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MetaFrame provides server-based computing to local and remote users through its
advanced Independent Computing Architecture (ICA) protocol. When you use
MetaFrame, applications are loaded and executed on the MetaFrame server. As
the application runs, the MetaFrame server intercepts the application’s display
data and uses the ICA protocol to transmit this data to the Citrix ICA Client
running on the user’s device. Similarly, the ICA Client sends keyboard and mouse
data to the MetaFrame server for processing.
The Citrix ICA protocol provides the following advanced capabilities:
u Transparent support for off-the-shelf Windows and DOS applications
u High performance on high- and low-bandwidth connections
u Minimal client workstation requirements
u Full-screen text presentation
u Keyboard and mouse input with data compression
u Error detection and recovery
u Encryption
u Data compression
u File system redirection for client drive mapping
u Print redirection for client printer mapping
u COM port redirection
u Clipboard cut-and-paste support (Windows clients only)
u Audio support
u Intelligent caching of bitmaps
u Persistent caching to disk
u Advanced algorithms that discard redundant screen changes and optimize
display operations