What Infrastructure as a Service Means to You

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More and more companies are looking to defray costs and gain flexibility by leveraging infrastructure that can be used on demand. What does this mean to you?

✓ Think about how you’re getting your services.

✓ Understand which services include a set of well-defined interfaces and which ones will lock you in to a complex set of services that will be difficult to move away from.

✓ Know why you’re using a cloud service. For example, if you need some temporary capacity to test a new application, your requirements will be very different than if you’re creating an application that will operate in a cloud.

In addition to understanding potential cloud gains, get familiar with how your infrastructure service provider handles the following capabilities:
✓ Explicitly defines service level agreements for availability, support, and performance (of provisioning more resource)

✓ A utility computing billing arrangement, relating cost to actual resource usage in a measured way

✓ A virtualization environment that enables the configuration of systems (for compute power, bandwidth, and storage) as well as the creation individual virtual machines (all to be available on an ad-hoc basis)

✓ A flexible, extensible, resource-rich environment that’s engineered for secure multi-tenancy (multiple users or tenants running the software in a shared environment on its servers)

✓ Internet connectivity, including a Web services interface to the customer’s management environment

Source of Information : cloud computing for dummies 2010 

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