On the three core elements of "cloud computing"

cloud computing requires the "cloud" provider to assemble a large amount of resources to provide users with seamless access to the resources that users enjoy in the form of services. This is the three core elements of cloud computing: resource pooling, capability publishing, and service patterns.


　　


resource concentration: By pooling all kinds of resources, the corresponding "cloud" is formed. This is a revolutionary change, but this practice has actually emerged. For example, a search engine can search at a high speed, the main reason is that the search engine operators have already put all the information on the network can be found in a specific form, so that the searcher is convenient and rapid access to search results, the search results in advance together with the pattern is equivalent to "cloud search." The well-known Taobao, is a network of businesses together to provide information to users, like the traditional shoppingmall, this can actually be seen as a "cloud market." If we can bring together hundreds of thousands of or millions of camera results of the city streets for the user to see, this is equivalent to building a "cloud view field".


　　


Ability Release: "Cloud" in the end what can bring us? Only the calculation and processing capacity and the corresponding resources released, let others share, can be called "cloud." In the early 90, we specialize in the issue of computing capacity, consider how to release storage space, database and other resources, so that others can store and query, research how to provide the release of the interface, so that resources can be easily accessible to users, just as people can easily access water pipes, Easy access to electricity by wire. If resources and computing power can not be released for users to use, only concentrated is no use, similar to Taobao if there is no market platform, you can not allow users to purchase the same goods.


　　


Service mode: The current computer field has formed a "asaservice" upsurge, its essence is to serve the form rather than the technical form to face the user. Users only care about what kind of service they enjoy and don't care what kind of resources are involved behind the service. For example, we used to buy software, just as we buy a house, whether we use it, we need to pay the full cost, but also need to prepare the appropriate resources for the software; then we share software from the web, like renting, cost reduction, and resources that don't need to be prepared at the client, so the problem becomes simple, But also need to pay a fixed time for the use of software costs; the advent of the cloud, is to enjoy services directly from the cloud, even do not care about the software itself, just care about the function of the software, and is paid by the number of times, this is like staying in a hotel, living a day to pay This is the concept of "service".


　　


for software, users only care about what functions they can enjoy, and don't care where the software is, that's the idea of "Software as a service (SaaS)"; We only care about how much space we have for storing data, not how to store it, that's the idea of "storage as a service (Staas)" , the user only cares whether the user's task can be completed, instead of caring about how it was done, this is the idea of "Platform as a service (PaaS)", where users are concerned with the ability to use computing systems on the scale needed, without caring about how their infrastructure is implemented, which is "infrastructure as Service (IaaS)". There are a number of applications like this that are delivered to the user by turning the capabilities and resources provided into a service.