Recently I was asked about the performance and scalability of XenApp from our CSA. And I got the following reports or informaitons. It will be helpful to everyone to check these reports and informations at single site.

XenApp 5.0

XenApp 5 Scalability Analysis

http://support.citrix.com/article/CTX119108

Citrix Presentation Server 4.5

Scalability – Number of Users per Presentation Server

http://support.citrix.com/article/CTX114848

Effects of Varying the Number of CPUs of a Citrix Presentation Server

http://support.citrix.com/article/ctx114844

Citrix Presentation Server 4.0

Citrix Presentation Server for Windows Server 2003 x64 Editions – Performance and Scaling Capability

http://support.citrix.com/article/CTX107341

MetaFrame XP

How Hyper-Threading Affects User Capacity of Metaframe XP Servers

http://support.citrix.com/article/ctx101880

Advanced Concepts Guide for MetaFrame XP with Feature Release 3 – P79

Effects of Varying the Number of CPUs and Hyper-Threading on MetaFrame XP Servers

http://support.citrix.com/article/ctx102497

MetaFrame 1.8

Windows 2000 Terminal Service Capacity and Scaling

http://support.citrix.com/article/ctx9354

Other sources

http://h71019.www7.hp.com/ERC/downloads/4AA0-9214ENW.pdf

http://www.dell.com/downloads/global/power/ps1q07-20070244-Citrix.pdf

http://www.brianmadden.com/blogs/brianmadden/archive/2004/02/19/the-4gb-windows-memory-limit-what-does-it-really-mean.aspx

Test tools

Citrix Server Test Kit Users Guide 2.1

http://support.citrix.com/article/ctx101744

EdgeSight for Load Testing 3.0

http://support.citrix.com/product/es/ltv3.0