Cloud Computing is not a hype but a model that has caught attention of IT executives.
The first question that arises is “What is Cloud Computing? “. There are many definitions, but for me, Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (eg, networks, servers, storage, applications, and services) that can rapidly manage service provider interaction with minimal effort . This cloud model Promotes availability and is composed of five essential characteristics, three service models, and four deployment models. ”
The essential features are self-service, resource sharing, flexibility, access via high-speed network services and measurable. Cloud services are SaaS (Software as a Service), PaaS (Platform as a Service) and IaaS (Infrastructure as a Service). Since the models of delivery of these services are Private cloud, cloud Community, Public and Hybrid cloud computing.
After this comes inevitably answer to the question “How is cloud computing different from the old and traditional outsourcing? “. For me it is clear that Cloud Computing is a computational model that has some fundamental differences in relation to outsourcing as we know it. For example, the elasticity is vital to allow the model pay-as-you-go (pay for what you consume) and economies of scale offered by massive data centers for cloud providers. Other differences are an automatic management (at a scale that is much larger than traditional data centers, where many operations, such as resource provisioning, are manual), standardized workloads (economy of scale is achieved when we reduce the variety of settings), automatic provisioning ( you requests and gets an immediate appeal by a self-service portal and not have to go through negotiations and delays until a physical server is installed and configured) and a billing similar to mobile telephony, where you pay for the resources consumed due and not idle settings.
The question then arises “Is cloud hosting a revolution or evolution? “. From the technological point of view, it is evolutionary, because it is built upon existing technologies known as virtualization. But we can consider cloud computing as a revolution in the way we manage and deliver IT. Probably consider more computing power as one of the utilities, along with energy, water, gas and communication.
One of the most common questions is “What are the benefits and risks of Cloud Computing? “. Starting with the benefits I can highlight a few things here as the speed of response to time-to-application “because cloud allows you to implement an application in much less time, or by adopting a ready-made in the SaaS model or developing a new route PaaS and / or IaaS. Just compare how long it takes to select, acquire, install and configure a new server. Three months? Four months? Other benefits are the alignment of investments with demand (you need not buy a machine to be used in six months), no need to invest the capital before using assets, and the possibility of using cloud computing as an escape valve for those situations of peak demand, which exceeds the capacity of the data center. Do not need to configure a data center to the peak period, but for your average use, using for example a public cloud for exceptional periods. Regarding the risks, remember the immediate issues of security and privacy (especially when speaking in public clouds), adherence to regulatory restrictions (compliance
issues), lock-ins by some cloud providers, and the difficulty of integration between applications clouds in the public and which will continue operating in on-premise model. Another challenge is the quality and availability of bandwidth.
A question that pops up when it comes to “What kind of application can i put in a cloud? “. Some are more prone and can go straight to the clouds, like e-mail and collaboration applications. Others, especially those that require a lot of integration with existing on-premise should be left for a second time. To begin your journey towards cloud computing applications I suggest starting with low risk, such as a web application that does not require greater integration with other systems and even demands access to sensitive data in terms of security and compliance.
And finally, ask “Public or Private Cloud? “. The answer is “depends”. Maybe both … A private cloud operates within the data center and may be the answer for those companies or applications that are highly sensitive in aspects of safety and regulatory compliance, and cannot in principle be in public clouds.
In the end, I would remind you, Cloud Computing is no longer a question of “if” but only “when and how“. For more, you can refer our Cloud Hosting Forum.
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