SPI Model of Cloud Computing among enterprises

Cloud computing has been dominating the overall aspect of tech sphere as more and more enterprises are coming forward and incorporating cloud into their core business processes. This is the reason why similarly sounding but confoundingly different something-as-a-service acrostic keeps weighting up. Cloud computing holds virtual networks which can be accessed from anywhere, at any time, using any device. Besides these shared features there are also many different clouds that operate in heavily disparate manner.

There exist three most common cloud models, SaaS (software as a service), PaaS (Platform as as Service), and IaaS (Infrastructure as a Service). All the three provides top notch but certainly varying beneficiaries to the users. SaaS (software as a service), enchants mostly to the cloud services delivered to the end user. While on the other hand IaaS (infrastructure as a service) and PaaS (platform as a service) provides a more holistic approach. But overall there is a very thin line between the three services making it very difficult to device between them.

Software as a service – In this service end user doesn’t have to install cloud’s infrastructure on device or any of its application. Rather, the cloud network’s infrastructure and applications are manipulated and maintained by the cloud administrator and anyone with the credentials required to enter the network can access those via virtual machines.

Examining Facebook or email is perhaps the best way to understand how the SaaS model operates. To access the network, there is no need to download a program to device, only a way onto the internet and valid login information will let you in. The device used to access is not linked with the stuff including photos, contacts, saved game progress, chats you run while logged in.

Platform as a service – In this service the software applications can be loaded, stored and run on PaaS cloud, which is a virtual platform. This cloud is mainly used to reduce the need of hardware for running software applications. Infact the virtual computing platform is offered by the provider under the PaaS model and users are sole proprietors of development, running their own software.
PaaS cloud is highly effective because the platform is flexible, and is a cost saving measure in itself. It scales to meet the demands implemented by the amount of software loaded on to it. To better understand the functionality of PaaS model, take it as a physical chunk of hardware that expands and contracts based on the storage space required by the user.
Infrastructure as a service – In this service, all the applications and cloud’s infrastructure is installed and maintained by the user itself. Virtual machines via hypervisor are used to access the cloud which is linked to the cloud provider’s data centers. Under this system, users are charged with operating the cloud; while storage demands are highly elevated as many virtual machines can take over physical devices.

Overall the three models have given a huge flexibility to the enterprises as they are able to manage their resource in a more systematic manner while encompassing on real time information sharing.

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