The concept of cloud computing has been around for almost 10 years since its introduction. In the past 10 years, cloud computing has achieved rapid development and earth-shaking changes.
Cloud computing is an add-on, use, and delivery model of Internet-based related services that typically involves providing dynamically scalable and often virtualized resources over the Internet. Cloud is a metaphor for the Internet and the Internet. In the past, the cloud was often used to represent the telecommunication network, and later used to represent the abstraction of the Internet and the underlying infrastructure. As a result, cloud computing can even make you experience 10 trillion operations per second, with such powerful computing power to simulate nuclear explosions, predict climate change, and market trends. Users access the data center through computers, laptops, mobile phones, etc., and perform calculations according to their own needs.
There are many ways to define cloud computing. For what exactly is cloud computing, at least 100 explanations can be found. At this stage, it is widely accepted that the National Institute of Standards and Technology (NIST) defines that cloud computing is a pay-as-you-go model that provides usable, convenient, on-demand network access and configurable access. The computing resource sharing pool (resources include network, server, storage, application software, services), these resources can be quickly provided, with little administrative effort or little interaction with service providers.
Cloud computing conceptCloud computing, a kind of distributed computing technology, the most basic concept is to automatically split a huge computational processing program into a myriad of smaller subroutines through a network, and then to a huge system composed of multiple servers. After the search, calculation and analysis, the processing result is returned to the user. Through this technology, network service providers can reach tens of millions or even billions of information in a matter of seconds, achieving network services that are as powerful as "supercomputers."
The simplest cloud computing technology has been found everywhere in network services, such as search engines, network mailboxes, etc. Users can get a lot of information by simply inputting simple commands.
In the future, mobile devices such as mobile phones and GPS can develop more application services through cloud computing technology.
Further cloud computing not only performs the functions of data search and analysis, but also the analysis of DNA structure, genetic map sequencing, and analysis of cancer cells in the future can be easily achieved through this technology.
The large-scale distributed computing technology earlier was the conceptual origin of "cloud computing."
The basic principle of cloud computing is that enterprise data centers will operate more like the Internet by distributing the computation across a large number of distributed computers rather than local or remote servers. This allows companies to switch resources to the applications they need and access computers and storage systems as needed.
This is a revolutionary move. For example, this is like a shift from the old single generator mode to the centralized power supply mode of the power plant. It means that computing power can also be circulated as a commodity, just like gas and water, easy to access and low cost. The biggest difference is that it is transmitted over the Internet.
The blueprint for cloud computing is already coming out: in the future, you only need a laptop or a mobile phone, you can use the network service to achieve everything we need, even the task of super computing. From this perspective, the end user is the true owner of cloud computing.
The application of cloud computing involves the idea of ​​uniting forces and using them for each of them.
At present, PC is still the core tool in our daily work life - we use PC to process documents, store data, and share information with others via email or USB flash drive. If the PC hard drive is broken, we will be helpless because of data loss.
In the era of "cloud computing", "cloud" will do the work of storage and calculation for us. “Cloud†is a computer cluster, each group consisting of hundreds of thousands or even millions of computers. The advantage of "cloud" is that the computer can be updated at any time to ensure that the "cloud" is immortal. Google has several such "clouds", and other IT giants such as Microsoft, Yahoo, and Amazon have or are building such "clouds."
At that time, we only need a computer with Internet access, no need to care about which "cloud" is stored or calculated, but once needed, we can use any device, such as computer, mobile phone, etc., to calculate quickly. And find this information. We no longer have to worry about data loss.
At the press conference on March 17, Schmidt made an image metaphor. He said that "cloud computing" is like a bank's automatic teller machine (ATM). We don't have to carry a lot of cash with us when we go out, we can use it whenever we need it.
Gu Xuemei, an engineer at Google, believes that the PC era is like having to use electricity for everyone, and they have to buy generators themselves. In the "cloud computing" era, everyone does not have to own a generator and buy electricity directly from a large power plant.
"Cloud computing" is not really a new concept. According to Gu Xuemei, before the "cloud computing", there is also "Grid CompuTIng" and so on. The idea is all about how computers work together. More than a decade ago, when she was still a graduate student, she knew these concepts, but the problem was that these concepts were never well realized.
After Gu Xuemei joined Google, she found that this concept has been implemented. Google's technology allows hundreds of thousands of computers to work together to form a powerful data center. Google China CEO Li Kaifu said in an interview with Caijing reporter that Google's real competitiveness lies in these "clouds", which give Google an unparalleled ability to store and calculate global data.
At the beginning of Google, Google did not deliberately pursue concepts such as "cloud computing" and "grid computing." But as a search engine, Google needs to have these "clouds" objectively. In fact, Yahoo's search also uses "cloud computing."
Cloud computing is an emerging approach to sharing infrastructure that connects huge pools of systems together to provide a variety of IT services. A number of factors are driving the need for such environments, including connected devices, real-time data streaming, adoption of SOA, and the dramatic growth of Web 2.0 applications such as search, open collaboration, social networking, and mobile commerce. In addition, the increased performance of digital components has greatly increased the scale of the IT environment, further strengthening the need for a unified cloud management.
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