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Nhiều người trong số các chỉ định được sử dụng bởi các nhà sản xuất và người bán để phân biệt sản phẩm của họ được khẳng định là nhãn hiệu hàng hoá. Trong trường hợp những chỉ định xuất hiện trong cuốn sách này, và O'Reilly & Associates, Inc được nhận thức của một tuyên bố nhãn hiệu, chỉ định đã được | Server Load Balancing Tony Bourke O REILLY Beijing Cambridge Farnham Koln Paris Sebastopol Taipei Tokyo Server Load Balancing by Tony Bourke Copyright 2001 O Reilly Associates Inc. All rights reserved. Printed in the United States of America. Published by O Reilly Associates Inc. 101 Morris Street Sebastopol CA 95472. Editor Jim Sumser Production Editor Matt Hutchinson Cover Designer Emma Colby Printing History August 2001 First Edition. Nutshell Handbook the Nutshell Handbook logo and the O Reilly logo are registered trademarks of O Reilly Associates Inc. Alteon WebOS Foundry Serverlron Cisco WebNS Cisco CSS F5 Network s BIG-IP and Arrowpoint are registered trademarks. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book and O Reilly Associates Inc. was aware of a trademark claim the designations have been printed in caps or initial caps. The association between the image of a jacana and the topic of server load balancing is a trademark of O Reilly Associates Inc. While every precaution has been taken in the preparation of this book the publisher assumes no responsibility for errors or omissions or for damages resulting from the use of the information contained herein. ISBN 0-596-00050-2 M Table of Contents Preface.ix I. Concepts and Theories of Server Load Balancing.1 1. Introduction to Server Load Balancing.3 In the Beginning.4 Evolution.7 Other Technologies.8 2. Concepts of Server Load Balancing.13 Networking Basics.13 Server Load Balancers.15 Redundancy.16 Provider Infrastructure.22 3. Anatomy of a Server Load Balancer.24 A Day in the Life of a Packet.25 Direct Server Return.27 Other SLB Methods.29 Under the Hood.30 4. Performance Metrics.32 Connections Per Second.32 Total Concurrent Connections.33 Throughput.33 Traffic Profiles.34 The Wall . . .
