Gregg - Systems performance: enterprise and the cloud

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Enterprise and the Cloud

Brendan Gregg

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Library of Congress Cataloging-in-Publication Data

Gregg, Brendan.
Systems performance : enterprise and the cloud / Brendan Gregg.
pages cm
Includes bibliographical references and index.
ISBN-13: 978-0-13-339009-4 (alkaline paper)
ISBN-10: 0-13-339009-8 (alkaline paper)
1. Operating systems (Computers)Evaluation. 2. Application softwareEvaluation. 3. Business
EnterprisesData processing. 4. Cloud computing. I. Title.
QA76.77.G74 2014
004.6782dc23
2013031887

Copyright 2014 Brendan Gregg

All rights reserved. Printed in the United States of America. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission to use material from this work, please submit a written request to Pearson Education, Inc., Permissions Department, One Lake Street, Upper Saddle River, New Jersey 07458, or you may fax your request to (201) 236-3290.

ISBN-13: 978-0-13-339009-4
ISBN-10: 0-13-339009-8
Text printed in the United States of America.
5 16

There are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknownsthere are things we do not know we dont know.

U.S. Secretary of Defense Donald Rumsfeld, February 12, 2002

While the above statement was met with chuckles from those attending the press briefing, it summarizes an important principle that is as relevant in complex technical systems as it is in geopolitics: performance issues can originate from anywhere, including areas of the system that you know nothing about and are therefore not checking (the unknown-unknowns). This book may reveal many of these areas, while providing methodologies and tools for their analysis.