What Is Cloud Computing?

There are plenty of definitions for "cloud computing" online, and for the most part, they generally point to the same thing: taking applications and running them on infrastructure other than your own. Companies or individuals who offload or effectively "outsource" their hardware and/or applications are running those apps "in the cloud." You may be outsourcing actual hardware, application development and hosting, or only wish to run online software from other providers. In other words, what you outsource to cloud vendors may and will be different from what other people or companies do... every situation is different, as are the cloud service levels.

Best Example of Cloud computing is a compelling paradigm. Its mission is to make computing available on retail basis. Let me illustrate with an example. Just few years back, commodities such as coconut oil or shampoo were available only in relatively small quantities such as 250 mg, or 100 gm. It made sense for companies and also a large population to buy them in these quantities. However there are occasions where even these quantities become large. For instance, a traveler in different town for a day may need both coconut oil and shampoo in such a small quantities for that day’s consumption that buying a 250 mg pack is not acceptable. This is where the idea of selling in small “sachet” became an interesting proposition. Once its practical importance is realized today every consumer product or service is available in “sachets”. The idea behind sachet is simple: Convenience for buyer and profitable for business. Sell or buy in quantities of your choice, at your location, and affordable prices. Mobile companies today use retail models where recharging is possible in quantities as small as few rupees. Now imagine if this is also possible in computing.

• Why do I buy a computer when I use it for only few hours a week?
• Why do I buy a printer when I need printing occasionally?

The answer is yes. And the name of model which is expected make computing available on retail basis is called cloud computing. Cloud computing intends to make the Internet the ultimate home of all computing resources- storage, computations, applications and allow end user (both individuals and business) to avail these resources in quantities of her choice, location of their preferences, for duration of their liking. In other world web become the provision store for all your computing needs. A business model built on this paradigm offers these resources as services - either on pay per use basis or rental basis

Why we need Cloud Computing?

There are people here that still remember a time when desktop computing didn't exist other than via a dumb mainframe terminal and everything was submitted as a job to run overnight!  Access to computing was done either through the company computer department or at an external computer bureau. With the advent of the IBM PC and the Apple IIe we became less reliant on others to provide access to computing power. Nowadays we run all sorts of complex programs on devices that are small enough to carry around. But with this we have encountered another problem, that of security and data management. 

I have just purchased a small laptop that has a hard disk with 500 GBytes of storage. As I fill this up with the various scraps of information it will become harder to keep a secure backup of the data. Of course I can buy a USB memory stick but this would be of limited use for keeping a full historical set of backups. Even if I use an external hard drive the time it takes to do daily and weekly backups is unacceptable.  

Come in Cloud Computing!   Let's all keep our data in the cloud, easy! At least it is if you have a reliable connection to the internet. And then there is the problem with securing your data! Also is the cloud hosting company reliable? It may be free at the moment but will it stay that way? If we have to pay to use this service how much will it cost? These are some of the questions you should be asking! 

Of course there is no right or wrong answer to the question "Should I be using the cloud?" as it will depend on individual circumstances. But before you jump one way of the other do take professional advice as a wrong decision can be costly to reverse at a later stage. 

Cloud computing does have its place and can be effective in the right circumstances but it is not the panacea for all problems.

Source of image is:-https://developers.google.com/appengine/training/intro/whatiscc

Let me ask you some questions just Google it and answer me if you can, then I will tell you the exact answers: ---

Q: Why does cloud computing exist? What are some of the reasons companies migrate to the cloud?

Q: What compliance support does the provider offer?

Q: What are our exit options?

Q: - What reporting options and audit support are available?

Q: - How quickly can operations be restored if the main system goes down?

Q: What are the three primary levels of cloud computing service and what are the main differences between them?

Q: What’s the pricing model and cost?

Q: Name some cloud vendors, what their products are, and which cloud service level(s) they support.

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