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- Herausgeber: Packt Publishing
- Kategorie: Fachliteratur
- Sprache: Englisch
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.
Das E-Book können Sie in Legimi-Apps oder einer beliebigen App lesen, die das folgende Format unterstützen:
Seitenzahl: 127
Veröffentlichungsjahr: 2013
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Table of Contents
Citrix XenApp Performance Essentials
Citrix XenApp Performance Essentials
Copyright © 2013 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: August 2013
Production Reference: 1120813
Published by Packt Publishing Ltd.
Livery Place
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Birmingham B3 2PB, UK.
ISBN 978-1-78217-044-0
www.packtpub.com
Cover Image by Abhishek Pandey (<[email protected]>)
Credits
Author
Luca Dentella
Reviewer
Andy Paul
Acquisition Editor
Pramila Balan
Commissioning Editor
Llewellyn Rozario
Technical Editors
Sanhita Sawant
Sonali S. Vernekar
Copy Editors
Adithi Shetty
Laxmi Subramanian
Project Coordinator
Suraj Bist
Proofreader
Amy Guest
Indexer
Hemangini Bari
Graphics
Ronak Dhruv
Abhinash Sahu
Production Coordinator
Manu Joseph
Cover Work
Manu Joseph
About the Author
Luca Dentella is an IT architect working for an Italian consulting company, Sorint.lab.
He graduated in Telecommunication engineering from the Polytechnic University of Milan and he specialized in Windows and virtualization technologies, becoming both a Microsoft and a VMWare Certified Professional.
In the last five years, he worked mainly for INGDirect, Italy, where he helped to design and develop the IT infrastructure. Some projects he was involved in include call center virtualization, design of bank shops infrastructure, and outsourcing part of the back office.
He also worked as a Java/C# developer, and now he administers Java Application Servers such as IBM WebSphere and RedHat JBoss, and uses his programming skills to write scripts and programs for automating administrative tasks.
He designs, implements, and administers XenApp farms for different customers.
I’d like to thank my family and my girlfriend for supporting me during the writing of this book. Special thanks goes to my colleagues Albino, Aldo, and Marco who helped me in understanding network and security concepts and suggested the use of WANem.
About the Reviewer
Andy Paul is an accomplished virtualization architect, instructor and speaker. He has designed and delivered virtualization projects for Fortune 500 companies, public and private healthcare organizations, and institutions of higher education. He has also served as a lead technical trainer, an adjunct professor, and a guest speaker for multiple organizations.
Andy is currently the Virtualization Practice Director at GlassHouse Technologies, where he manages the delivery teams, oversees project architecture, and also is a VDI subject matter expert.
Visit Andy’s Blog at www.paultechnologies.com/blog.
I would like to thank my wife, Mandy, for her support and dedication which has enabled me in all of my professional pursuits.
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Preface
Citrix XenApp is an application-delivery solution that allows apps to be virtualized, centralized, and managed in the datacenter.
A critical task every Citrix administrator has to perform is to design and maintain an infrastructure that performs well; poor performances have a high impact on users' satisfaction.
What this book covers
Chapter 1, Designing a Scalable XenApp Infrastructure, helps IT architects design a good XenApp infrastructure.
Chapter 2, Monitoring and Improving Server Performances, helps XenApp administrators monitor XenApp servers and fine-tune them for best performance.
Chapter 3, Optimizing Session Startup, helps XenApp administrators reduce the session start-up time.
Chapter 4, Improving End User Experience, helps XenApp administrators improve the end user experience.
Chapter 5, Optimizing for WAN Links, helps XenApp administrators optimize and test XenApp farms for WAN users.
What you need for this book
This book covers the latest version of Citrix XenApp 6.5, but some of the optimizations described are applicable for previous versions too. During the writing of this book, particular attention was given to pointing out which features are available only in XenApp 6.5 or with a particular licensing.
Who this book is for
This book is for IT architects and administrators who need a quick guide to design and optimize XenApp farms.
It helps to design and maintain a scalable, high-performing XenApp infrastructure with guidelines and tips to optimize system loads, sessions, and user experience.
A chapter is dedicated to WAN links, with specific suggestions about how to optimize and test farms in that scenario.
Conventions
In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.
Code words in text are shown as follows: "They consist of a .vhd file (contains the data of the virtual disk)."
Any command-line input or output is written as follows:
New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: " You can change the priority of a policy from the context menu or from the Actions pane".
Note
Warnings or important notes appear in a box like this.
Tip
Tips and tricks appear like this.
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Chapter 1. Designing a Scalable XenApp Infrastructure
The design of a XenApp infrastructure is a complex task that requires a good knowledge of XenApp components. Taking the right decisions in the design phase may also greatly help system administrators to expand XenApp farms for satisfying new business requirements or to improve the user experience.
In this chapter you will learn:
XenApp infrastructure
A XenApp infrastructure is composed of two main elements:
Regardless of your farm size, it is recommended to have at least one server dedicated to infrastructure services.
XenApp 6.5 introduces a new server mode, session-only, for servers that only host published applications as shown in the following screenshot:
Choosing the session-host mode only during server setup
Virtual versus physical servers
You can run your XenApp farm on physical servers or on virtual servers.
Citrix supports XenApp running on the following hypervisors:
My suggestion is to deploy your farm in a virtual environment; the use of a virtual environment makes possible to deploy new servers in minutes, without the need of buying physical hardware. In the design phase, this means you may choose to split the components on different servers and you may count on the high-availability features of the hypervisor. When the farm is in production, this means you may more easily deploy new servers to fulfill new business requirements or to improve performances.
Sizing controllers
A XenApp farm requires some infrastructure components that run on servers deployed with the controller role. Depending on the size of your farm, you may choose to install all these components on the same server or to scale them on different servers.
Data store
The data store is the repository for all the static information of your farm (farm, servers and applications configurations, administrative accounts, and so on).
Each session-host server in your farm needs a constant connection to the data store. When the Independent Management Architecture (IMA) service starts, it queries the data store and stores the farm configuration in the local host cache (LHC). Every 30 minutes, the IMA service then contacts the data store to ensure that its LHC is consistent.
If you deploy your session-host servers specifying the session-only mode, you may reduce the data store load and make the startup and join processes faster, as they require less data during the join and sync process.
Note
Refer to Citrix Knowledge Base (http://support.citrix.com/article/CTX114501
