But it may come as some surprise to find this old cliché applies just as much to the history of computers as to what are the advantages and disadvantages of cloud computing pdf, revolutions, and kings and queens. Photo: Cloud computing: the hardware, software, and applications you’re using may be anywhere up in the “cloud.
As long as it all does what you want, you don’t need to worry where it is or how it works. Internet, usually in a completely seamless way. Exactly where the hardware and software is located and how it all works doesn’t matter to you, the user—it’s just somewhere up in the nebulous “cloud” that the Internet represents. Cloud computing is a buzzword that means different things to different people. You can build up a personal collection of tracks you like and access them from any device, anytime, anywhere. Most of us use cloud computing all day long without realizing it.
When you sit at your PC and type a query into Google, the computer on your desk isn’t playing much part in finding the answers you need: it’s no more than a messenger. The words you type are swiftly shuttled over the Net to one of Google’s hundreds of thousands of clustered PCs, which dig out your results and send them promptly back to you. The same applies to Web-based email. But then Web-based services such as Hotmail came along and carried email off into the cloud. Preparing documents over the Net is a newer example of cloud computing. Simply log on to a web-based service such as Google Documents and you can create a document, spreadsheet, presentation, or whatever you like using Web-based software.
Most importantly, the service you use is provided by someone else and managed on your behalf. If you’re using Google Documents, you don’t have to worry about buying umpteen licenses for word-processing software or keeping them up-to-date. Nor do you have to worry about viruses that might affect your computer or about backing up the files you create. Google does all that for you. It’s “on-demand” Cloud services are available on-demand and often bought on a “pay-as-you go” or subscription basis. So you typically buy cloud computing the same way you’d buy electricity, telephone services, or Internet access from a utility company. Just like electricity, you can buy as much or as little of a cloud computing service as you need from one day to the next.
It comes in two basic flavors, public and private, which are the cloud equivalents of the Internet and Intranets. Web-based email and free services like the ones Google provides are the most familiar examples of public clouds. Types of cloud computing IT people talk about three different kinds of cloud computing, where different services are being provided for you. Note that there’s a certain amount of vagueness about how these things are defined and some overlap between them.
Since you buy what you need and pay-as-you-go, this is often referred to as utility computing. Web-based email and Google Documents are perhaps the best-known examples. Zoho is another well-known SaaS provider offering a variety of office applications online. Web-based tools so they run on systems software and hardware provided by another company. Google App Engine are examples of PaaS. Advantages and disadvantages of cloud computing What’s good and bad about cloud computing?
Advantages The pros of cloud computing are obvious and compelling. If your business is selling books or repairing shoes, why get involved in the nitty gritty of buying and maintaining a complex computer system? If you run an insurance office, do you really want your sales agents wasting time running anti-virus software, upgrading word-processors, or worrying about hard-drive crashes? Drawbacks , it ranked cloud computing providers like Akamai and Amazon on eco-friendliness, alongside companies like Facebook, Google, and Twitter whose services are underpinned by a massive global network of data centers. Chart: Growth in energy use in data centers from 2007 to 2013. Intelligence published in Computer Weekly, October 8, 2012. I do, I’ll update the chart!