Shulou(Shulou.com)06/02 Report--

One of the broadest definitions of cloud computing is that cloud computing is a model that supports a pool of shared configurable computing resources (such as networks, servers, storage, applications, and services) for ubiquitous, convenient, on-demand network access that can quickly provide and publish these resources with minimal administrative effort or service provider interaction.

The cloud saved us money, but the unusually high bill surprised many IT leaders and executives. The cloud is flexible, agile, and smart, but many people are locked in a single provider whose architecture is not ideal and require a large number of migration costs to achieve change. In many ways, cloud computing reflects human nature. Everyone believes that their ideas are the best. Regardless of the data, people sometimes blindly follow their beliefs. No cloud provider, cloud service or cloud architecture is perfect.

There are three main cloud service models:

Infrastructure-as-a-Service (IaaS)

Platform-as-a-Service (PaaS)

Software-as-a-Service (SaaS)

At present, the more classic applications are service end cloud and application end cloud.

Server-side cloud

Traditional application servers need to find computer rooms, buy mainframes, buy storage, buy bandwidth and other hardware equipment, and then hire professional staff to maintain them, all of which require a sum of money to be invested in advance. Then the machines bought are of fixed performance, and there will be a shortage of resources in some cases where there is peak computing. So cloud computing service (server cloud) is that a Tuhao company buys 100 times the resources you need, then installs the physical equipment, builds a cloud platform on it, and then marks these physical resources as common resources on the server and sells them. As long as enough customers use it, the investment can be recovered. For example, I want to build a forum, I found a discuss version, traditionally I want to buy machines, buy bandwidth, register and so on. I have to invest a sum of money in these bought equipment. If I don't use it, I can only sell it second-hand, and the price is not good. So at this time, if I choose Aliyun and choose 2 CPU,4G memory and 100 gigabytes of storage, then I will pay 30 yuan a month, which is only 360 yuan a year. If you buy these by yourself, it is estimated that you will have to invest 60,000 to 70,000 at a time. But also need to ask the staff to maintain. This money is still very important for entrepreneurs. It is also very important that the cloud resources I buy are not fixed, so I can apply for or reduce the resources as needed, so that I only need to pay for the temporary resources. Just like there are only two people who usually travel, Didi Taxi takes an ordinary car or carpool, but like a promotion requires six passengers, so I can choose a six-seater business car, and if there are more than 11 people, I can choose a face-to-face bus. In this way, I only need to pay for the chauffeured car to use different kinds of chauffeured car service. The same is true for cloud computing, but you don't have to buy your own server (buy your own car) as much as you need to apply for as many resources as you need (call a taxi according to the number of people). Server-side cloud is to uniformly maintain CPU, memory, storage, network and other resources by a Tuhao company to provide computing resources, just like providing water and electricity. Service end cloud is mainly aimed at service providers. Individual users have no impact.

Application end cloud

The application side is more classic than the network disk and office cloud. Network disks, such as Baidu, provide network storage, and current broadband and 4G can provide sufficient bandwidth so that multiple devices can access the same data. Office cloud, in the past, office needs to install software such as office2010 to use, so now office365 provides the ability to open and edit Word documents and store files in onedriver using a browser, thus realizing cloud storage. After the office cloud, you can achieve collaborative work, such as TIM collaborative work, or "write together" can be edited by multiple people at the same time, these editing changes are handled in the cloud. Client-side cloud has the greatest impact on ordinary users, which will be an important technology implementation that tablets can replace laptops in the future.

In addition, cloud computing also shows a variety of advantages in industry applications, because the natural distributed storage characteristics of cloud computing are very consistent with many current industry applications, such as chain sales, finance, transportation, medical care and so on. These industry applications have the distributed characteristics of physical decentralized logic centralization, and can complete the flexible applications of independent operation, safe operation and integrated operation through the cloud computing platform.

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