Computers Are Your Future

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Nov 3, 2013 (3 years and 7 months ago)

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Computers Are Your Future

Twelfth Edition

Spotlight 5: Cloud Computing







Copyright © 2012 Pearson Education, I nc. Publishing as Prentice Hall

1

Cloud Computing

Copyright © 2012 Pearson Education, I nc. 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, I nc. 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


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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, I nc. Publishing as Prentice Hall

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Cloud Computing

Service Categories

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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, I nc. 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)

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Cloud Computing

Service Categories

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Cloud Deployment
Methods


Three basic types of deployment models:

o
Private cloud

o
Public cloud

o
Hybrid cloud

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Cloud Deployment
Methods


Type of cloud deployment may be directly
related to security.

Copyright © 2012 Pearson Education, I nc. 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

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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, I nc. Publishing as Prentice Hall

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Pros and Cons of

Cloud Computing

Copyright © 2012 Pearson Education, I nc. Publishing as Prentice Hall

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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 2009. 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, I nc. 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

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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, I nc. Publishing as Prentice Hall

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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.


Publishing as Prentice Hall

Copyright © 2012 Pearson Education, I nc. Publishing as Prentice Hall

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