Maximizing Performance and Scalability with IBM WebSphere

565 Pages·2004·20.098 MB·English

by  Adam Neat (auth.)

Maximizing Performance
and Scalability with
IBM WebSphere
ADAM NEAT
APress Media, LLC
Maximizing Performance and Scalability with IBM WebSphere
Copyright ©2004 by Adam Neat
Originally published by Apress in 2004
All rights reserved. No part of this work may be reproduced or transmitted in any form or by
any means, electronic or mechanical, including photocopying, recording, or by any informa
tion storage or retrieval system, without the prior written permission of the copyright owner
and the publisher.
ISBN 978-1-59059-130-7 ISBN 978-1-4302-0801-3 (eBook)
DOI 10.1007/978-1-4302-0801-3
'Ii'ademarked names may appear in this book. Rather than use a trademark symbol with every
occurrence of a trademarked name, we use the names only in an editorial fashion and to the
benefit of the trademark owner, with no intention of infringement of the trademark.
Technical Reviewer: Matt Hagstrom
Editorial Board: Steve Anglin, Dan Appleman, Gary Cornell, James Cox, Tony Davis, John
Franklin, Chris Mills, Steven Rycroft, Dominic Shakeshaft, Julian Skinner, Martin Streicher,
Jim Sumser, Karen Watterson, Gavin Wray, John Zukowski
Assistant Publisher: Grace Wong
Project Manager: Tracy Brown Collins
Copy Editors: Kim Wunpsett, Nicole LeClerc
Production Manager: Kari Brooks
Production Editor: Laura Cheu
Proofreader: Linda Seifert
Compositor: Gina M. Rexrode
fildexer:CarolBurbo
Artist: Kinetic Publishing Services, LLC
Cover Designer: Kurt Krames
Manufacturing Manager: Tom Debolski
The information in this book is distributed on an "as is" basis, without warranty. Although every
precaution has been taken in the preparation of this work, neither the author(s) nor Apress
shall have any liability to any person or entity with respect to any loss or damage caused or
alleged to be caused directly or indirectly by the information contained in this work.
The source code for this book is available to readers at http: I lwww. a press. com in the
Downloads section.
To my loving wife, Michelle; my Mum; Dad; and little sister
thank you for your encouragement, support, and drive over the
past several years, of which this endeavor especially would not
have been without it.
Contents at a Glance
About the Author .....................................................x i
About the Technical Reviewer ......................................x iii
Acknowledgments ......................................................x v
Introduction .......................................................x vii
Chapter 1 The Need for Performance ............................1
Chapter 2 WebSphere Scalability and Availability .......... 33
Chapter 3 WebSphere 4 and 5 Component Architectures ....... 51
Chapter 4 WebSphere Infrastructure Design .................. Bl
Chapter 5 WebSphere Deployment and
Network Architecture ................................1 49
Chapter 6 WebSphere Platform Performance,
Tuning, and Optimization ..........................2 31
Chapter 7 WebSphere Failover and High
Availability Considerations ......................2 91
Chapter 8 External WebSphere System Availability .........3 43
Chapter 9 WebSphere EJB and Web Container Performance ...3 71
Chapter 10 Developing High-Performance
WebSphere Applications ............................3 95
Chapter 11 WebSphere Database Performance
and Optimization .................................... .411
Chapter 12 legacy Integration: Performance
Optimization ....................................... .453
Chapter 13 Performance Management Tooling .................. .473
Chapter 14 Profiling and Benchmarking WebSphere ...........5 03
Index ................................................................5 19
v
Contents
About the Author ..................................................
xi
About the Technical Reviewer ................................
xiii
Acknowledgments ...................................................
xv
Introduction ......................................................
xvii
Chapter 1 The Need for Performance ....................... 1
Quantifying Performance .............................................I
Managing Performance ................................................5
What Constitutes a Performance Improvement? ..................... 7
Measuring Business Improvements ..................................1 4
TCO and ROI Equal TCI: Total Cost of Investment ..............1 9
Managing Performance: A Proven Methodology .....................2 4
Summary ...............................................................3 2
Chapter 2 WebSphere Scalability and Availability .. 33
Scalability and Availability: A Primer .........................3 4
Costs of Availability, Performance, and Scalability ......... .43
Summary ...............................................................5 0
Chapter 3 WebSphere 4 and 5
Component Architectures .......................
51
Component Architecture Overview ..................................5 1
Comparing the Versions ............................................. 79
Summary ...............................................................8 0
vii
Chapter 4 WebSphere Infrastructure Design ............ 81
Examining the x86/IA-64/x86-64 Platform
{Intel and AMD) ..................................................8 2
Examining the SPARC RISC Platform {Sun Microsystems) .........9 4
Examining the Power4 Platform (IBM) ............................ 109
Comparing Disk Systems ............................................1 20
Exploring Advanced Features ......................................1 45
Summary .............................................................1 48
Chapter 5 WebSphere Deployment and Network
Architecture ....................................
149
Overview of Key Components ....................................... 149
Topological Architecture .........................................1 54
WebSphere Topological Architecture Blueprints ................1 65
Summary .............................................................2 29
Chapter 6 WebSphere Platform Performance, Tuning,
and Optimization ................................
231
The Need for Speed ................................................2 31
Performance Testing a Platform ..................................2 33
Optimization and Tuning Checklist ..............................2 51
Summary .............................................................2 90
Chapter 7 WebSphere Failover and High Availability
Considerations ..................................
291
WebSphere High Availability and Failover Fundamentals .......2 92
Web Server Failover and High Availability .....................3 07
Web Container Failover and High Availability .................3 11
EJB Container Failover and High Availability .................3 34
Summary .............................................................3 42
Chapter 8 External WebSphere System Availability
.343
Web Sphere's Reliance on Available External Systems ..........3 43
LDAP Server Availability .........................................3 44
NFS Server Availability ..........................................3 47
Network Infrastructure Availability ............................3 52
Database Server Failover ........................................3 56
Summary .............................................................3 70
viii
Chapter 9 WebSphere EJB and Web Container
Performance .......................................
371
The Container: An Overview .......................................3 71
What Do Containers Do? ...........................................3 73
Tuning and Optimization ..........................................3 77
Summary .............................................................3 94
Chapter 10 Developing High-Performance WebSphere
Applications .....................................
395
The Top 20 List of Performance Development
Considerations ................................................3 96
Web Tier Performance ..............................................3 97
Business Tier Performance ....................................... .400
Data Tier Performance ............................................ .406
Summary .............................................................4 10
Chapter 11 WebSphere Database Performance and
Optimization .....................................
411
WebSphere Database Overview ..................................... .411
Databases Supported .............................................. .412
J2EE Database Integration ....................................... .414
WebSphere Database Tuning ....................................... .427
WebSphere Connection Pool Manager ............................. .442
Summary .............................................................4 51
Chapter 12 Legacy Integration: Performance
Optimization .....................................
453
Legacy Integration: What Is It? ................................ .453
Design Considerations for Legacy Integration ................ .455
Summary .............................................................4 72
Chapter 13 Performance Management Tooling ............
473
Overview of Performance Tooling ................................ .473
Monitoring System Utilization .................................. .474
Moni taring Disk I/0 .............................................. .485
Moni taring Network Performance ................................. .490
Moni taring WebSphere Application Performance ................ .497
Summary .............................................................5 00
ix
Chapter 14 Profiling and Benchmarking WebSphere ...
503
Profiling and Benchmarking, Revisited ..........................5 03
Why Profile and Benchmark? .......................................5 04
A Practical Approach to Profiling ..............................5 05
Tools Available ....................................................5 07
Summary .............................................................5 17
Index ...............................................................
519
X
About the Author
Adam Neat, who lives in Melbourne, Australia, is a consulting manager for one
of the world's leading management and IT consultancy firms where he's the
Australian and New Zealand infrastructure and platform lead, focusing on tech
nical architectures such as host systems, storage systems, and operating systems
(and all things in-between), within the communications and technology market
sector.
He's recognized as a global expert in infrastructure and platform architec
tures, and he provides specialty expertise in technical architectures covering
technologies such as J2EE/Java, various forms of middleware (MQ, CORBA, and
so on), large-scale systems, performance management, and application design
and architecture, as well as the deployment, configuration, and management of
enterprise application servers such as IBM's WebSphere, BENs WebLogic, and
Sun's Sun ONE Application Server.
Adam continues to be heavily involved in the integration and production
optimization oflarge-scale Unix-based systems and databases.
Working with a Global500 client list, Adam has significant experience with
deep technologies and large-scale systems and more than ten years of industry
experience. Adam frequently presents at industry conferences on platform archi
tectures, J2EE and .NET, and open source and Linux topics. He's involved with
several open-source and Linux initiatives and has written for various industry
magazines and publications about these topics.
He's a member of the Australian Institute of Management and has a degree
in Computing Systems from Monash University in Australia.
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