What Is 'Cloud Computing'?

An Overview of the Common Computing Term

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What Is Cloud Computing?

'Cloud Computing' is a somewhat nebulous term to describe users 'renting' or borrowing online instead of actually purchasing and installing it on their own computers. It is the same business model as people using Gmail or Yahoo mail services, except that cloud computing goes much further and includes daily computing activities. Cloud computing is where entire businesses and hundreds of employees will run their computer tools as online rented products.

All of the processing work and file saving will be done 'in the cloud' of the Internet, and the users will plug into that cloud every day to do their computer work.

Cloud Computing Involves Three Differents Technologies:

  1. Online File Storage (i.e. private online cyberlockers)
  2. Software as a Service (aka "Saas" or "SaS")
  3. Platform as a Service (aka "PaaS" or "PaS")

Online File Storage has been around for many years but is now becoming very widespread as hard drive space now costs less than a dollar per gigabyte. Google Docs, Microsoft Skydrive, Dropbox, Asus Cloud Storage, and many hundreds of providers now offer free or low-cost online storage for users.

Software and Platform as a Service describe the business model of users logging into a centralized hub to access their software products. Users open their files and software only while online, using only their web browser and passwords. It is similar to the idea of mainframe terminals, but cloud computing involves a much larger "cloud" (network) of processing computers at the center.

SaaS/Cloud Example 1

Instead of selling you a copy of Microsoft Word for $300, a cloud computing model would "rent" word processing software to you through the Internet for perhaps 5 dollars a month. You would not install any special software, nor would you be confined to your home machine to use this rented online product.

You simply use your modern web browser to log in from any web-enabled computer, and you can access your word processing documents in the same way that you would access your Gmail.

SaaS/Cloud Example 2

Your small car sales business would not spend thousands of dollars on a sales database. Instead, the company owners would "rent" access to a sophisticated online sales database, and all the car salesmen would access that information through their web-enabled computers or handhelds.

SaaS/Cloud Example 3

You decide to start a health club in your hometown and need computer tools for your receptionist, financial controller, 4 salespeople, 2 membership coordinators, and 3 personal trainers. But you do not want the headaches nor the cost of paying part-time IT staff to build and support those computer tools. Instead, you give all your health club staff access to the cloud of the Internet and rent their office software online, which will be stored and supported somewhere in Arizona. You will not need any regular IT support staff then; you will just need occasional contract support to ensure that your hardware is maintained.

The Benefits of SaaS/Cloud Computing

The primary benefit of cloud computing is reduced cost for everyone involved.

Software vendors do not have to spend thousands of hours supporting users over the phone... they would simply maintain and repair a single central copy of the product online. Conversely, users wouldn't have to shell out the large up-front costs of fully purchasing word processing, spreadsheet, or other end user products. Users would instead pay nominal rental fees to access the large central copy.

The Downsides of Cloud Computing:

The risk of cloud computing is that the users must place a high level of trust into the online software vendors that they will not disrupt the service. In a way, the software vendor holds its customers "hostage" because all of their documentation and productivity is now in the vendor's hands.

Security and protection of the file privacy become even more necessary, as the massive Internet is now part of the business network.

When a 600-employee business switches to cloud computing, they must choose their software vendor carefully. There will be dramatically reduced administration cost to use cloud computing software. But there will be an increase in the risks of service disruption, connectivity, and online security.

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