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What is infrastructure as a service (IaaS) in cloud computing?

infrastructure as a service (IaaS)IaaS is one of the four models of the cloud computing services. IaaS provides the hardware and hardware related services for the business. This includes hardware, networking, storage, data centers, and utility software among others. These are provided on a pay for use basis. The businesses would have to pay for the usage alone. They would be charged for the amount utilized and duration of usage.  The businesses stand to gain from this model as they

can scale up and down their utilization depending on their needs. They don’t get to control or manage the cloud infrastructure that they use. But can control the operating system, storage and applications deployed on them.

3 Major Types of cloud computing services

 Value of IaaS to business

This facility of off loading the tasks to the cloud during the peak requirements is often referred to as cloud bursting. This cloud bursting concept is very valuable to the business because they can save considerable amount on investments on additional servers which may be useful only when the demand is high and the rest of time remain utilized or under utilized.

 Pricing of IaaS

There are many innovations in the pricing models for IaaS. The popular ones are

1. BYOL (Bring Your Own License): In this plan the businesses could user their existing licenses on the cloud infrastructure. This way they only pay for the infrastructure they are using.

2. PAYG (Pay As You Go): Under this plan, the customer has to pay for the infrastructure and the softwares used.

These come packaged together.

Characteristics of Iaas

1. Usually IaaS is platform independent

2, Infrastructure costs are shared among all the users

3. Charged only for usage

4. Resources can be scaled as per requirements

Advantages of IaaS

1. Capital expenditure on hardware and infrastructure can be greatly reduced.

2. Manpower with high skills for hardware and infrastructure management wouldn’t be required

3. Reduction in risk on ROI

4. Does not cost much to enter or exit the service

Disadvantages of IaaS

1. Success of use of the service depends on the capability of the vendor.

2. In the short run the costs may appear low but in the long cost of renting out services may prove costly.

3. Due to the shared nature of the infrastructure used, the applications may need new and special kind of security.

4. Governance issues: As data could be stored anywhere over the cloud, it’s important to determine the nature of data stored. Many countries have strict regulations on the location of the data

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