Exceed onDemand A Technical Whitepaper

Exceed onDemand 5 — A Technical Whitepaper
X Applications Traditional X Server Exceed onDemand)
Traditional X Servers are not bandwidth-sensitive. Therefore, regardless of whether the X server
is runs over a LAN or dialup connection, it consumes the same amount of bandwidth and sends
the same amount of data over the network. Exceed onDemand, however, is not only capable of
significantly reducing bandwidth usage; it is also bandwidth-sensitive. As the connection speed
and the bandwidth decline, the advanced compression and caching mechanism is engaged and
the bandwidth usage decreases.
As the results indicate, launching a Gnome desktop using traditional X server generated more than
7MB of data transfer between the Red Hat Linux machine and the PC. Using Exceed onDemand to
launch the same desktop from the Linux machine over a LAN connection generated 90 times less data
and brought the total transfer down to 80kb. The same test was performed over a dialup connection
and data transfer was further reduced to 67kb, or more than 100 times less data. The amount of data
transfer varies from one application to another depending on the nature of the X application.
Summary
Fast Connection Slow Connection
Gnome Desktop 7,132 80 (1.1%) 67 (0.9%)
Gnome and Firefox 11,087 324 (2.9%) 254 (2.3%)
The server requirements for Exceed onDemand Server can be as disparate as the system requirements
for the X applications themselves. Software evaluators are strongly advised to install Exceed
onDemand in their environments and monitor the CPU, bandwidth and memory usages, as well as
the access pattern. Using these statistics, software evaluators will appreciate the uniqueness of their
environments. Finally, they can make an informed decision on the server hardware requirement that
can satisfy their expectations.
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