Cloud computing: every silver lining has a cloud

Cloud computing is here to stay. Larger companies and public sector bodies continue to increasingly embrace cloud computing. However, while the cloud certainly has its benefits, there are a number of key challenges that businesses face when assessing a (further) move to cloud computing, and it is vital to understand that there is no ‘one-size-fits-all’ approach.

cloud computing

When we talk about the ‘cloud’ in terms of cloud procurement, there are usually three models, or layers, of cloud computing services under consideration – Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Each layer provides a different type of IT services that are stacked upon each other with IaaS at the bottom providing storage and server infrastructure, moving to the platform level PaaS, and the application layer SaaS sitting at the top of the stack.

Being layered on the same stack means that IaaS, PaaS and SaaS are often procured using cloud services agreements that address many of the same or related issues. However, it is important to note that each agreement’s key terms may vary in a number of areas. Some key aspects are discussed below.

Key purpose

Each technology layer focuses on different issues and so cloud agreements should highlight the key purpose of the relevant cloud technology. For IaaS, the agreement should focus on the creation, management and control of virtual machines; for PaaS, it should focus on the development and deployment of software applications; and for SaaS, it should focus on the management of access to software and applications.

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