Cloud Computing
Cloud Computing

Cloud Computing

History has a funny way of repeating itself, so they say. For the last three decades, 1 trend in computing continues to be loud and clear: big, centralized, mainframe systems are”outside”; personalized, power-to-the-people, do-it-yourself PCs happen to be”in.” Before personal computers took off in the early 1980s, if your company wanted payroll or sales figures calculating in a rush, you would probably have bought in”data-processing” services from a different company, using its expensive computer programs, that technical in number crunching; these days, you can do the job just as easily on your desktop computer with off-the-shelf software. Or will you? In a dramatic throwback to the 1970s, many businesses are discovering, once more, that buying in pc services makes more business sense than do-it-yourself. This new trend is called cloud computing and also, not surprisingly, it is linked into the Internet’s inexorable increase. What is cloud computing? How does this function? Let’s take a closer look!

Photo: Cloud computing: the hardware, software, and software you are using may be everywhere up at the”cloud” As long as it does what you want, you do not need to worry where it is or how it functions.

What is cloud computing?

Cloud computing means that instead of all of the computer hardware and software you are using sitting on your desktop, or somewhere inside your institution’s system , it’s provided for you as a service by a different organization and obtained over the Web , usually in a completely seamless way. Exactly where the hardware and software is located and how it all works does not matter to you, the user–it’s only somewhere up in the nebulous”Cloud” that the Internet represents.

For some, it’s simply another way of describing IT (information technology)”outsourcing”; many others use it to imply any computing service provided over the Internet or a similar network; plus some define it as any bought-in computer support that you utilize that sits outside your firewall. However we define cloud computing, there’s no doubt it makes most sense when we stop talking about abstract definitions and look at some simple, real illustrations –so let us do just that.

Straight forward examples of Cloud Computing

Screenshot: Soundcloud–one of my favourite examples of a site (and mobile program ) that utilizes cloud computing to good effect. Musicians and DJs upload their music, which”followers” can hear (or preview) for free through real time streaming. You can build up a private collection of tracks you prefer and access them from any device, anytime, anyplace. The music you listen to stays up in the cloud: in theory, there’s only ever 1 copy of every audio file that is uploaded. Where is the audio saved? No-one but Soundcloud should know–or care.

Most of us use cloud computing all day long without realizing it. When you sit in your PC and type a query into Google, the computer on your desk isn’t playing much role in finding the answers you need: it is no longer than a messenger. The words that you type are quickly shuttled over the Web to one of Google’s hundreds of thousands of clustered PCs, which dig out your results and send them immediately back to you personally. Whenever you do a Google search, the real work in finding your replies may be carried out by means of a computer sitting in California, Dublin, Tokyo, or even Beijing; you don’t understand –and most likely you do not care!

The same applies to Web-based email. Once upon a time, email was something you could only send and receive with a program running in your PC (sometimes known as a mail client). But Web-based services like Hotmail came along and carried off email into the cloud. Now we are all used to the idea that emails can be saved and processed via a host in some remote region of the Earth, readily accessible from a Web browser, where we happen to be. Pushing email off to the cloud which makes it supremely convenient for active people, always on the move.

Preparing documents over the Net is a more recent case of cloud computing. Simply log on to some web-based service such as Google Documents and you’re able to produce a document, spreadsheet, presentation, or whatever you enjoy using Web-based applications. Rather than typing your words to a program like Microsoft Word or OpenOffice, running in your computer, you are using similar software running on a PC at one of Google’s world-wide information centres. Like an email drafted on Hotmail, the document you create is stored remotely, on a Web server, so you can get it from any Internet-connected computer, any place in the world, any time you like. Have you any idea where it is stored? No! Do you care where it’s stored? Using a Web-based service like this means you’re”contracting out” or”outsourcing” some of your computing demands to a business such as Google: they pay the cost of creating the software and maintaining it up-to-date plus they earn back the cash to do this via advertising as well as other services that are personalized.

Most importantly, the support you use is offered by someone else and handled in your behalf. If you are using Google Records, then you do not need to worry about buying umpteen permits for word-processing software or retaining them up-to-date. Nor do you need to worry about viruses that might affect your computer or about backing up the files you create. Google does everything for you. One fundamental principle of cloud computing is that you no longer need to worry how the service you are buying is supplied: using Web-based services, you simply concentrate on whatever your job is and leave the issue of providing dependable computing to somebody else.


Cloud services can be found on-demand and often bought on a”pay-as-you go” or subscription basis. So you typically buy cloud computing exactly the same way you’d buy power, phone services, or Web access from a utility company. Occasionally cloud computing is absolutely free or paid-for in different ways (Hotmail is subsidized by advertising, by way of instance ). Just like electricity, you can buy as much or as little of a cloud computing support as you want from 1 day to another. That is great if your needs change unpredictably: it means that you don’t need to purchase your own gigantic computer system and danger have it sitting there doing nothing.

It is public or private

Now we all have PCs on our desks, we’re used to having total control over our computer systems–and complete responsibility for them as well. Cloud computing affects all that. Web-based email and free services such as those Google supplies are the most recognizable examples of public clouds. The world’s biggest online retailer, Amazon, became the world’s largest supplier of cloud computing in early 2006. When it discovered it had been using just a fraction of its enormous, international, computing power, it began renting out its spare capacity over the Net through a new entity named Amazon Web Services (AWS). Personal cloud computing works in much the same way but you get the resources you use through protected network connections, much like an Intranet.

Types of cloud computing

IT people talk about three distinct kinds of cloud computing, where different services are being provided for you. Be aware that there’s a certain amount of vagueness about how these items are defined and some overlap between them.

Infrastructure as a Support (IaaS) means you’re purchasing access to raw computing hardware over the web, like servers or storage. As you buy exactly what you need and pay-as-you-go, this is often referred to as utility computing. Ordinary hosting is a simple instance of IaaS: you pay a monthly subscription or a per-megabyte/gigabyte fee to have an hosting company serve up documents for your website from their servers. Web-based email and Google Documents are possibly the most bizarre examples. Zoho is another famous SaaS provider offering a variety of office software online.
Platform for a Service (PaaS) means that you create software using Web-based tools in order that they run on systems software and hardware supplied by another corporation. Therefore, by way of example, you may develop your own ecommerce site but have the whole thing, for example, shopping cart, checkout, and payment mechanism operating on a merchant’s server. App Cloud (out of and also the Google App Engine

Benefits and disadvantages of cloud computing


The professionals of cloud computing systems are obvious and compelling. If your business is selling books or repairing shoes, why get involved with the nitty gritty of buying and maintaining a intricate computer system? If you run an insurance office, you might not want your sales representatives wasting time running anti-virus software, updating word-processors, or fretting about hard-drive crashes? Do you truly want them cluttering your expensive computers using their private emails, illegally shared MP3 files, and naughty YouTube movies –if you can leave that responsibility to someone else? Cloud computing permits you to purchase in just the services you want, when you want them, cutting on the upfront capital costs of computers and peripherals. You prevent equipment heading out of date along with other recognizable IT problems like ensuring system security and reliability. It’s possible to add extra services (or take them away) at a minute’s notice as your business needs change. It is really fast and simple to add new applications or services to your business without waiting for weeks or months to your computer (and its applications ) to arrive.


Immediate advantage comes at a cost. Instead of purchasing computers and software, cloud computing means you purchase services, so one-off, upfront capital costs become ongoing operating costs rather. That might work out much more expensive from the long term.

If you are using software for a service (for example, writing an account using an internet word processor or sending emails via webmail), then you need a dependable, high-speed, broadband Internet connection working the entire time you are working. That’s something we take for granted in countries such as the United States, but it’s much more of an issue in developing countries or rural areas where broadband is unavailable.

If you are purchasing in services, you can purchase only what folks are providing, which means you may be limited to off-the-peg solutions rather than ones that just meet your requirements. Not only that, but you are entirely at the mercy of the suppliers if they suddenly decide to stop supporting a product that you’ve come to depend on. (Google, for instance, upset many users as it declared in September 2012 that its cloud-based Google Docs would drop support for older however de facto standard Microsoft Office file formats like .DOC, .XLS, and .PPT, giving a mere one week’s notice of this shift –though, after public pressure, it later expanded the deadline by three months) Critics charge that cloud-computing is a return to the bad-old days of mainframes and proprietary methods, where businesses are secured into improper, long-term arrangements with big, inflexible companies. Instead of utilizing”generative” systems (ones that can be added to and extended in exciting ways that the programmers never envisaged), you’re effectively using”dumb terminals” whose applications are severely limited by the supplier. Great for security and convenience, perhaps, but what will you lose in flexibility?

Consider cloud computing as renting a completely serviced apartment instead of buying a house of your own. Certainly there are benefits concerning convenience, but there are enormous limitations on how you can live and what you can alter. Can it automatically workout better and more economical for you in the long term?

Is cloud computing really better for the environment?

In theory, cloud computing is environmentally friendly since it uses fewer resources (servers, cooling systems, and the rest) and much less energy if 10 individuals share an efficiently run, centralized, cloud-based system than if each of them run their own wasteful local system. One hosting provider in the UK told me that his firm has adopted cloud systems since it means they can manage more customers on much fewer physical servers, even with big savings in equipment, maintenance, and electricity costs. In theory, cloud computing systems ought to be a big win for the environment; in practice, it’s not quite so simple.

Paradoxically, given how we’ve defined cloud computing, it matters where your cloud servers are and how they are powered. If they are in data centers powered by coal, instead of cleaner fuels like natural gas or (better still) renewable energy, then the general environmental effect could be worse than your current setup. There’s been a lot of debate regarding the energy usage of huge data centers, partially thanks to Greenpeace highlighting the matter once a year because 2009. By 2017, at a report known as Clicking Clean, Greenpeace has been congratulating around 20 of the biggest data center operators (including Apple, Facebook, and Google) for starting on the course toward 100 percent renewable energy. In the USA specifically, quite a few cloud (and web hosting) providers explicitly say if their servers are powered by conventional or green electricity, and it is relatively simple to find carbon-neutral service suppliers if that’s an important element for your business and its CSR (corporate social responsibility) objectives.

Chart: Growth in energy use in data centers from 2007 onward.

When it comes to overall influence on Earth, there’s another issue to consider. If cloud services simply move things you’d do in your office or house to the cloud, then that’s 1 thing; the environmental impact merely transfers elsewhere. But a great deal of cloud- and Internet-based providers are encouraging us to use more computers and gadgets like iPads and iPhones for more, spending more time on the internet, and doing more things that we didn’t previously do at all. In that way, cloud computing systems is helping increase global energy usage and greenhouse gas emissions –thus describing it as environmentally friendly is highly misleading.

This was evident from a 2012 analysis by DatacenterDynamics (DCD) Intelligence, the British Computer Society, and spouses (reported in Computer Weekly), which showed that global energy usage from data centers climbed from 12 gigawatts (GW) in 2007 to 24GW from 2011 and predicted it would reach 43GW some time in 2013. But a follow-up study demonstrated a significant slowing of the speed of expansion in cloud energy intake, from 19 percent in 2011/2 to around 7% in 2013. Growing concerns regarding the effect of cloud computing have also prompted imaginative new solutions. Afterwards in 2013, for instance, researchers in Trinity College Dublin and IBM announced they had found a way to reduce cloud emissions by more than 20 percent by employing intelligent load-balancing algorithms to spread out data processing between different data centres. In April 2018, Googledeclared that it had successfully cancel all of its conventional electricity use through coordinated investments in renewable (solar and wind ) energy.

Nevertheless, with cloud computing predicted to become a $5 billion trillion business by 2020, global electricity consumption seems certain to go on rising. In the end, the international environment, the bottomline trend–ever-increasing energy consumption–is the one which matters. It’s no fantastic congratulating yourself on switching to diet java if you’re drinking four times more of it than you ever used to. In 2016, Peter Judge of DatacenterDynamics summed up things pithily:”No one talks about total energy used by data centers because the figures you get for which are bothersome, depressing and frustrating…. The truth is: data center power is out of control.”

By Google hunts to Facebook updates and super-convenient Hotmail, most of us appreciate the benefits of cloud computing very highly, so the energy consumption of data facilities is bound to grow –and ensuring these large, power-hungry servers are fueled by green energy will become more and more important in the years to come.


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