Fog Computing (Fog Computing) is the extended concept of cloud computing (Cloud Computing), pioneered by Cisco. This "cloud" and "fog" is named after the "fog is closer to the surface of the cloud," the sentence.
Fog computing is as much an image as cloud computing. The cloud floats in the sky, high above, far away, deliberately abstract, but the fog is realistic and close to the ground, right beside you and me. Fog computing is not made up of powerful servers, but consists of weaker, more decentralized types of functional computers that infiltrate factories, automobiles, electrical appliances, street lights and all kinds of supplies in people's material lives.
The architecture used in fog computing is more distributed and closer to the edge of the network than cloud computing. Fog calculates that data, data processing, and applications are concentrated in devices on the edge of the network, rather than being stored almost entirely in the cloud as cloud computing does. Data is stored and processed more dependent on local devices than on servers. Therefore, cloud computing is a new generation of centralized computing, and fog computing is a new generation of distributed computing, in line with the internet's "go-centric" characteristics.
Fog computing is not like cloud computing, requiring users to connect to large data centers on the remote to access services. In addition to the architectural differences, cloud computing can provide applications, fog computing is basically available, but fog calculation of the use of computing platform may not be as effective as large data centers.
Cloud computing bears the industry's hopes. The industry has widely believed that the future computing function will be entirely in the cloud. However, importing and exporting data from the cloud is actually more complex and difficult than people think. Because of the increasing number of access devices (especially mobile devices), bandwidth is stretched when data is transmitted and information is obtained. With the rapid development of IoT and mobile Internet, people rely more and more on cloud computing, more and more networking equipment, more and more intelligent devices, mobile applications are the main way to handle transactions on the network, the number of data and data nodes increasing, not only occupy a lot of network bandwidth, but also increase the burden of the data center, Data transmission and information acquisition will be getting worse.
Therefore, with the distributed fog calculation, intelligent routers and other equipment and technical means, the composition of data transmission between different devices, can effectively reduce network traffic, data center of the calculation load is also reduced correspondingly. Fog computing can be used as a computational process between the Machine-to-machine (machine-machine dialogue) network and cloud computing to cope with the large amount of data generated by the Machine-to-machine network-using handlers to preprocess the data to enhance its usefulness.
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Fog calculation can not only solve the problem of automation of networked devices, but more crucially, it requires a smaller amount of data transfer. Fog computing This "technology to promote the internal operation of the cloud data center" is beneficial to improve local storage and computing capabilities, eliminate data storage and transmission bottlenecks, is well worth looking forward to.
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