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VCP5-IaaS revision has now started. September 3, 2012

Posted by vbry21 in VCP5-IaaS, VMware Training.
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Yet another certification to pass, so I’ve started revising for my VCP5-IaaS certification

Cloud computing promotes availability and has five essential characteristics:

The first characteristic is on-demand self-service. A consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically, without requiring human interaction with each service’s provider.

The second characteristic is broad network access. Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms. Some examples of such client platforms include mobile phones, laptops, and personal digital assistant or PDA.

The third characteristic is resource pooling. The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model which is basically defined as sharing of computing resources with multiple clients by means of virtual safeguards, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. There is a sense of location independence in that the customer generally has no control or knowledge over the exact location of the provided resources but may be able to specify location at a higher level of abstraction, for example, country, state, or datacenter. Examples of resources include storage, processing, memory, network bandwidth, and virtual machines.

The fourth characteristic is rapid elasticity. Capabilities can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out. Capabilities can also be rapidly released to quickly scale in. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be purchased in any quantity at any time.

The last characteristic is measured service. Cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service, for example, storage, processing, bandwidth, and active user accounts. Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and the consumer of the utilized service.

 

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