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What Is Cloud Computing?

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1What Is Cloud Computing? Empty What Is Cloud Computing? Fri Jun 08, 2012 3:56 pm

muanhanh


Admin

Starting from mid 2007, the term information technology has added a new word, cloud computing (computing clouds). Until now the whole world is talking about cloud computing, but cloud computing is, how it is used and who shall serve for many problems still unclear.

A scientific understanding of cloud computing is a computing paradigm in which tasks are assigned to a set of connections, software and services can be accessed via the internet. The set of connections, service and software is built based on a computer network, located somewhere in the world and is called "cloud". Remote operations work on cloud services that allow users access to the computer center possesses strong computer configuration. Just use the low-profile computer or PDA, users can access to the data warehouse and the massive computer center with the services needed for the job. For this reason, the cloud was described earlier as demand computing.



The following example may be a simple illustration to clarify the definition of cloud computing. Before 2000, the user wants to use what services must be licensed, CD to install on personal computers such as accounting software, manage addresses, phone numbers, management staff. This trend at that time proved quite effective when just a few clicks, users can find the necessary information about a specific employee or address and phone number of an individual. However, all data are stored on personal computers thus able to move the flexibility of these services is not high unless the user owns a laptop. Today no one to do it again. Just a PDA or a personal computer with an internet connection, individual users can search the required information is stored somewhere on the internet. There are many services on the management of personal information, e-mail on the internet that users can exploit such as Yahoo mail, Gmail, facebook, .... Companies no longer have to purchase the software license management personnel, financial management, investment ... no longer have computers with powerful configuration to the server containing the data of the company. Instead, just pay the company to use the service and, more specifically, all the software on employee management, financial management, has been a provider of installation services at a center of power any payment. The server has a large memory capacity and the service provider to install and can hire companies to store corporate data.

Computational power of cloud computing is implemented through distributed computing systems, combined with virtualization technology and parallel computing. In contrast with traditional models of computation on a personal computer, where the personal computer resources are used to handle the job from start to finish and return the results to the user, the cloud computing model only use your personal computer users as the interface between the user and the data centers and computing. In other words, the personal computer is only required to draft and send a request to the central computer via a Web interface like that.

Cloud computing is often confused with grid computing, on demand computing or autonomic computing. What is the difference between them. Grid computing (grid computing) is a form of distributed computing, in which there exists a virtual supercomputer, is the inclusion of a single set of computers linked together and coordinate activities to implement the huge task, this task can be broken down to parallel implementation on a computer application set that computer. Computing on Demand (utility computing) is a block of computer resources such as memory, processor as a separate service and a specific project similar to the traditional infrastructure such as electricity or telephone network. Autonomic computing system is the ability to operate, manage and treat these problems occur during operation. Cloud computing is seen as a natural next step in development of the model. The cloud systems are now capable of autonomous and able to handle tasks such as grid computing, and specific to a particular requirement such as computing on demand.
Computing centers

Perhaps Amazon is the commercialization of the first computer center, although this technique has been used for years. In 2006, Amazon offers a service called Amazon Web Services (AWS). Anyone with a credit card here can also hire a virtual machine on a computer system of the giant Amazon to run the application. The AWS operator can quickly add servers as demand increases or less when demand drops off. This service is very cheap.

Amazon is not the only company online center building large-scale computing. Google also operates a global network of tens of computing centers with more than 2 million computers. Users often find information on the internet through Google Search is taking cloud services from Google. Microsoft is investing billions to add about 35,000 servers per month. Yahoo is busy building a computer like that.

Thus, future trends, is the enterprise data center will strengthen our individual direction cut (because the center of this kind of performance is very low - only about 6% of processing power) focused in a few centers actually be effective. As the enterprise data center will flourish, and to hire outside companies. In the short term small and medium enterprises are the main customers for large enterprises may not be secure entrust their data for others to manage. Also they will gradually transfer the data type is not important, for example NASDAQ AWS hired to provide information services to find old transactions, called Market Replay.

Software cloud

Trend as software becomes a service provided through the Internet will become evident. More importantly, applications, whether online or not, will not be a package more cumbersome - they will include many components to meet the diverse needs of customers.

The term was first used for this trend are service-oriented architecture - SOA (Service Oriented Architecture). SOA initially appeared in the open-source applications, but then the big companies move in that direction as well as their applications more cumbersome and not well meet the flexibility that customers need. Instead of providing our customers with specialized software such as financial management or customer management, service providers introduce the cluster software can combine to make arbitrary kinds of new software applications needs of each client. Using enterprise SOA can integrate information technology systems become more complex by converting them into a set of services to mix them into the business processes.

The commercialization of SOA for the business is still very primitive, but conversely, the web-based applications to consumers is growing. For example, take advantage of Google Map with a list of houses for sale, homes for rent from Craglist, people make Housingmaps.com, specializing in meeting the demand for rent, house quick sale, including detailed maps. A series of such combined services was established, users can manually combine the modules together to create their applications such as news with images, sound or connection .... In May 4-2008, Salesforce.com and Google announced integration of their online services, through which users Salesforce (client management support) can transfer data through Google's online applications.

Devices connected

If the data center and application software itself "cloud", the connected device will drag them about the real world where people going through that interaction back to the "cloud". The advent of PDAs, such as mobile G1 or Google Chrome browser is to serve the purpose of that connection. Trends in production of tiny laptops - netbooks - is no exception to this effort. Terminals do not need strength, just have a high mobility and good connections. The process of cloud computing will be assumed.
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