Book Image

Citrix XenApp Performance Essentials

By : Luca Dentella
Book Image

Citrix XenApp Performance Essentials

By: Luca Dentella

Overview of this book

Citrix XenApp is an application virtualization product that allows users to connect to their corporate applications from any device. XenApp can host applications on central servers and allows users to interact with them remotely or stream and deliver them to user devices for local execution. Citrix XenApp Performance Essentials is a practical guide that provides you guidelines, best practices, and real world examples that will help you to improve the performance of your farm, identifying and solving possible bottlenecks and using advanced features including the new features provided by XenApp 6.5. Citrix XenApp is widely used to deliver enterprise applications to end users. This book covers the whole process of optimizing a XenApp farm, starting from the design phase all the way to tuning for remote users and connecting via geographic links. With your farm in production, you will understand what to monitor and how to optimize your farm, as well as how to use an open-source tool, WANem, to test the applications' behavior with different link conditions. You will also learn which settings and features XenApp offers to optimize CPU and memory utilization. This book will help you to prevent or solve performance problems and make your users happy working with published applications.
Table of Contents (12 chapters)

The logon process


Let's briefly review the logon process that starts when a user launches an application through the Web Interface or through a link created by the Receiver. Some of the steps have been already presented in Chapter 1, Designing a Scalable XenApp Infrastructure, where you learned the different components of a Citrix farm. The following diagram explains the logon process:

The logon process

Resolution

The user launches an application (A) and the Web Interface queries the Data Collector (B) that returns the least-loaded server for the requested application (C). The Web Interface generates an ICA file and passes it to the client (D).

Connection

The Citrix client running on the user's PC establishes a connection to the session-host server specified in the ICA file. In the handshake process, client and server agree on the security level and capabilities.

Remote Desktop Services (RDS) license

Windows Server validates that an RDS/Terminal Server (TS) license is available.

AD authentication...