Issue link: https://insights.oneneck.com/i/1200933
Chapter 1: Your Workloads, Your Options 9 These materials are © 2017 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. Public cloud operating models explained There are a lot of different ways that organizations can con sume public cloud resources. In fact, as you consider the totality of your personal and professional life, you're probably using at least one product or service from companies that operate in one of these spaces. There are a number of offer ings from which you can choose: ✓ Software as a Service (SaaS): Under this simplest form of cloud computing, the provider controls everything and provides just an application layer interface for specific configuration items. As the customer, you don't need to worry about any underlying services except those that may extend the service. ✓ Platform as a Service (PaaS): Sometimes, you just need an infrastructure and an application development plat form, and that's where PaaS comes in. Platforms typically include the capability to automate and deploy applica tions and include operating systems, databases, middle ware, tools, and services. The customer is responsible for managing the application and data layers only. ✓ Infrastructure as a Service (IaaS): With an IaaS imple mentation, the vendor provides you with the underlying network, storage, compute resources, and virtualization technology. However, your IT staff will have the respon sibility for configuring the resources. In addition, you have responsibility for managing security, databases, and applications. ✓ Everything else (*aaS): Everywhere you turn, you see all kinds of as‐a‐service products popping up. There are Virtual Desktops as a Service, Databases as a Service, and all kinds of services emerging. In most cases, these are just variations of one of the three items mentioned earlier (most often, repackaged SaaS offerings). Let me give you a bit more of an overview of how these serv ices are differentiated. As you can see in the On‐Premises column in Table 1‐1, when you have a traditional on‐premises environment, you own and manage it all, from the network to the application.