Computers Are Your Future Twelfth Edition Spotlight 5: Cloud Computing Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 1

Cloud Computing Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 2

What is Cloud Computing? Cloud computing o Hosting computers, or cloud providers, deliver services to subscribers over the Internet o Five general characteristics On-demand self-service Broad network access Resource pooling Rapid elasticity Measured service Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 3

What is Cloud Computing? Cloud computing (con’t.) o Hosting computers (servers) and subscribers (clients) main components—just as with client/server network o Three major differences: Delivery of services must be over the Internet Services are scalable Services are managed completely by the cloud provider, the owner, or manager of the host Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 4

Cloud Computing Service Categories Infrastructure-as-a-Service (IaaS) o Outsourcing of hardware—equipment used to sustain the operations of a company or enterprise o Hardware-as-a-Service (HaaS) o Virtual datacenter o Main factors in the use of IaaS: Reduced budget outlay Fast time to market with programs and ideas Reassignment of IT personnel Replacement of unknown with known costs Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 5

Cloud Computing Service Categories Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 6

Cloud Computing Service Categories Platform-as-a-Service (PaaS) o Permits subscribers to have remote access to: Application development Interface development Database development Storage and testing Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 7

Cloud Computing Service Categories Software-as-a-Service (SaaS) o Enables software to be deployed from provider, delivered over the Internet, and accessed by subscriber o Primary reason to subscribe: Limited risk Rapid deployment Fewer upfront costs Increased reliability Standardized backup procedures Lower total cost of ownership (TCO) Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 8

Cloud Computing Service Categories Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 9

Cloud Deployment Methods Three basic types of deployment models: o Private cloud o Public cloud o Hybrid cloud Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 10

Cloud Deployment Methods Type of cloud deployment may be directly related to security. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 11

Pros and Cons of Cloud Computing Pros of cloud computing o Scale and cost Organization doesn’t have to purchase equipment, license software, and hire personnel o Encapsulated change management Hardware and associated technology can be maintained, redistributed, and redirected without major reconfiguration o Choice and agility Subscriber deploys solutions that best suit current needs and trends o Next-generation architectures Innovation and foresight in IT are not a threat to the bottom line or current operations Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 12

Pros and Cons of Cloud Computing Cons of cloud computing o Lock-in Able to switch providers without losing ability to access data o Reliability Provider could lose power, run into trouble, burn down, or simply go out of business o Lack of Control Control of resources is surrendered to someone in the cloud o Security Concerns are centered on data being stored on servers owned and controlled by the cloud provider Results in compromise between cost and risk management Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 13

Pros and Cons of Cloud Computing Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 14

The Future of Cloud Computing Statistics from an IDC report: o Cloud computing growing at a rate five times greater than any traditional IT product o Cloud applications were the main service in By 2014, a projection shows a decrease in SaaS; an increase in IaaS and PaaS o By 2014, worldwide revenue from public IT cloud computing could exceed $55.5 billion. o By 2014, the U.S. will receive 51.4% of the cloud services revenue, Western Europe and the Asia/Pacific regions will make gains. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 15

The Future of Cloud Computing Guidelines for the growth of an open cloud o Open Cloud Manifesto (2009) guidelines: Providers must work together and collaborate Providers must not lock subscribers into its platform, removing freedom of choice Providers should reduce repetition of standards Any changes to standards should be driven by the needs of the subscriber, not the provider Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 16

The Effect of Cloud Computing on the Enterprise The effect of cloud computing: o IT costs will be more directly related to value. o IT departments will be more agile. o The need to stay current with businesses and customer demands and requests is pushing the cloud toward real- time switching among cloud resources. Real-time switching is the seamless moving of workloads between private and public clouds to maximize the best value available. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 17

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Printed in the United States of America. Copyright © 2012 Pearson Education, Inc. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall 18