Cloud Computing For Dummies

Learn what cloud computing is and how it differs from traditional approaches. This book takes you through the options, what they can do for your company, how to choose the best approach for your business, and how to build a strategy. You’ll learn about managing and securing cloud services and get down-to-earth advice about planning your move to the cloud.

Learn how to:

  • Understand the benefits and challenges, how to select a service, and  what’s involved in
  • getting it up and running
  • Analyze how much a cloud data center can save your company in power, labor, property, and other expenses
  • Understand issues involved in cloud management and how governance is defined inside the cloud
  • Recognize the assorted risks and how to determine acceptable risk levels

Table of Contents

Contents at a Glance


Part I: Introducing Cloud Computing
Chapter 1: Grasping the Fundamentals
Chapter 2: Check out Cloud Service Delivery Models
Chapter 3: Viewing the Cloud Holistically
Chapter 4: Developing Your Cloud Strategy

Part II: Understanding the Nature of the Cloud
Chapter 5: Seeing the Advantages of the Highly Scaled Data Center
Chapter 6: Comparing Technology Costs: Cloud versus
Traditional Data Center
Chapter 7: Checking the Cloud’s Workload Strategy
Chapter 8: Managing Data
Chapter 9: Discovering Private and Hybrid Clouds

Part III: Examining the Cloud Elements
Chapter 10: Seeing Infrastructure as a Service
Chapter 11: Exploring Platform as a Service
Chapter 12: Using Software as a Service
Chapter 13: Understanding Massively Scaled Applications and Business Processes
Chapter 14: Setting some Standards

Part IV: Managing the Cloud
Chapter 15: Managing and Securing Cloud Services
Chapter 16: Governing the Cloud
Chapter 17: Virtualization and the Cloud
Chapter 18: Managing Desktops and Devices in the Cloud
Chapter 19: Service Oriented Architecture and the Cloud
Chapter 20: Managing the Cloud Environment

Part V: Planning for the Cloud
Chapter 21: Banking on Cloud Economics
Chapter 22: Starting Your Journey to the Cloud

Part VI: The Part of Tens
Chapter 23: Ten (Plus One) Swell Cloud Computing Resources
Chapter 24: Ten Cloud Dos and Don’ts


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Chapter 12 Using Software as a Service

In This Chapter

▶ Looking at the origins of SaaS:
▶ Understanding how the SaaS model works
▶ Understanding the economics and the ecosystem

“When did Software as a Service get its start?” might sound like a straightforward question, but it isn’t.  In one way, you could say that when timesharing systems were all the rage more than 30 years ago, all software was delivered to customers as a service.  Mainframe systems were simply too expensive for most companies to buy their own systems. A couple of decades later, minicomputers, servers, and personal computers changed the dynamics of the market. Economically, it was feasible for any Tom, Dick, and Harriet to own their own systems and the software. Not all software moved to an internal model however. (Software such as ADP’s payroll system, for example, remained Software as a Service.)

Two key events converged to create the model that we now call Software as a Service (SaaS):

✓ First, the Internet became a commercial platform.

✓ Second, software costs and complexities became so difficult that running, upgrading, and managing software become too complex for many companies to manage. This was especially true for small- and mediumsized companies that didn’t want the expenses of managingall the components.  These companies were the first to embrace this new generation of SaaS.  Today, SaaS is the most mature area of cloud computing. SaaS gained initial traction with the customer relationship management (CRM) market and has expanded into others – particularly the collaboration market and the enabling tools and management environments. In this chapter, we explain what SaaS is, talk about its business model, and discuss the types of vendors that are in the market today.

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