We write this article for those who are the beginner in cloud servers in Vietnam. What is cloud computing? How does it work?

For the last 3 decades, one trend in computing has been clear: big, centralized, mainframe systems have been “out”; personalized, power-to-the-people, do-it-yourself PCs have been “in.” Before PCs took off in the early 1980s, if your company needed sales or payroll figures calculating in a hurry, you would have bought in “data-processing” services from another company, with its own expensive computer systems, that specialized in number crunching. You can do the job easily on your desktop with off-the-shelf software. Or can you? In a striking throwback to the 1970s, many companies are finding that buying in computer services makes more business sense than do-it-yourself. This new trend is called cloud servers VPS Vietnam and, not surprisingly, it is linked to the Internet’s inexorable rise.

What is cloud computing?

Cloud computing means that instead of all the computer software and hardware you are using sitting on your desktop, it is provided for you as a service by another company and accessed through the Internet, often in a completely seamless method. Exactly where the hardware / software is located and how it all works does not matter to you, the user— it is just somewhere up in the nebulous “cloud” that the Internet represents.

Cloud computing is a buzzword that means different things to different people. For some, it is another way of describing IT “outsourcing”; others use it to mean any computing service offered over the Internet; and some define it as any bought-in computer service you use that sits outside your firewall. However, we define cloud computing, there is no doubt it makes most sense when we stop talking about abstract definitions and look at some simple, so let’s do just that.

Types of cloud computing

IT people talk about 2 different models of cloud computing, where different services are being provided for you. Notice that there is a certain amount of unclear things about how they are defined and some overlap between them.

• IaaS – Infrastructure as a Service means you are buying access to raw computing hardware over the Net, like servers or storage. Because you buy what you need and pay-as-you-use, this is usually referred to as utility computing. Ordinary hosting is a simple example of IaaS: you pay a monthly subscription or the per-megabyte/ gigabyte fees to have a hosting company serve up files for your web from their servers.
• SaaS – Software as a Service means you use a complete apps running on someone else’s system. Web-based email and Google Documents are maybe the best-known examples. Zoho/ SoundCloud is another famous SaaS provider offering a variety of office apps online.

• PaaS – Platform as a Service is also a service models of cloud servers Intel Vietnam. It allows you to develop apps using web-based tools so they operate on systems software and hardware provided by another company. So, for example, you may develop your own ecommerce web but have the whole thing, including the checkout, shopping cart and payment mechanism operating on a merchant’s server. App Cloud (from salesforce.com) and the Google App Engine are examples of PaaS.