云计算的特点不包括(云计算的主要特征不包括什么)

Compared with network computing, what is not a characteristic of cloud computing is that it is suitable for tightly coupled scientific computing.

The word "computation" has different connotations in different eras. Generally, people will think of the mathematics and numerical calculations with which we are most familiar. Since the birth of computer technology, mankind has entered the "era of computer computing." With the further development of technology and the rapid growth of network broadband, people have begun to enter the "network computing era." "Network computing" has a broader connotation than "mathematical computing".

Network computing, also known as meta-computing, seamless, scalable computing, global computing, etc., is defined as a wide-area "seamless integration and collaborative computing" environment". MSIL programs can be compiled into different machine codes in real time and then executed on different machines. Refers to the user’s information transfer and processing through a dedicated computer network or a public computer network.

Network computing combines the robustness of the client/server structure, the simple and universal data access method of the Internet and the flexibility of distributed objects, providing a unified cross- The platform development environment, based on open and de facto standards, transfers the complexity of applications and data from the desktop to intelligent networks and network-based servers, providing users with universal and fast access to applications and information.

The main characteristics of cloud computing services
(1) Ultra-large scale
"Cloud computing management system [2]" has considerable In terms of scale, Google Cloud Computing already has more than 1 million servers, and the "clouds" of Amazon, IBM, Microsoft, Yahoo, etc. all have hundreds of thousands of servers. Enterprise private clouds generally have hundreds or thousands of servers. "Cloud" can give users unprecedented computing power.
(2) Virtualization
Cloud computing supports users to obtain application services at any location and using various terminals. The requested resources come from the "cloud" rather than a fixed tangible entity. The application runs somewhere in the "cloud", but users don't actually need to know or worry about the specific location where the application is running. With just a laptop or a mobile phone, everything we need can be achieved through network services, even tasks such as supercomputing.
(3) High reliability
The "cloud" uses measures such as multiple copies of data, fault tolerance, and isomorphic interchangeability of computing nodes to ensure high reliability of services. Using cloud computing is more reliable than using local computers.
(4) Versatility
Cloud computing does not target specific applications. With the support of "cloud", ever-changing applications can be constructed, and the same "cloud" can support the operation of different applications at the same time.
(5) High scalability
The scale of "cloud" can be dynamically expanded and contracted to meet the needs of the growth of application and user scale.
(6) On-demand services
The "cloud" is a huge resource pool that you purchase on demand; the cloud can be billed like tap water, electricity, and gas.
(7) Extremely cheap
Due to the special fault-tolerance measures of the "cloud", extremely cheap nodes can be used to form a cloud. The automated centralized management of the "cloud" eliminates the need for a large number of enterprises to bear the burden of increasingly expensive data center management. Cost, the versatility of "cloud" greatly improves resource utilization compared with traditional systems, so users can fully enjoy the low-cost advantages of "cloud". It often only takes a few hundred dollars and a few days to complete what previously required tens of thousands of dollars. dollars and months to complete. Cloud computing can completely change people's future lives, but at the same time, we must also pay attention to environmental issues, so that we can truly contribute to human progress, rather than simply improving technology.
(8) Potential dangers
In addition to providing computing services, cloud computing services must also provide storage services. However, cloud computing services are currently monopolized in the hands of private institutions (enterprises), and they can only provide commercial credit. Government agencies and commercial institutions (especially commercial institutions that hold sensitive data like banks) should be sufficiently vigilant when choosing cloud computing services. Once commercial users use cloud computing services provided by private organizations on a large scale, no matter how strong their technical advantages are, these private organizations will inevitably hold the entire society hostage with the importance of "data (information)." For the information society, "information" is crucial. On the other hand, data in cloud computing is confidential to cloud computing users other than the data owner, but there are really no secrets to the commercial organizations that provide cloud computing. This is just like ordinary people cannot monitor other people's phone calls, but within telecommunications companies, they can monitor any phone call at any time. All these potential dangers are an important prerequisite that commercial institutions and government agencies must consider when choosing cloud computing services, especially cloud computing services provided by foreign institutions.