In the definition of Fog Computing: from wikipedia:
Fog computing or fog networking is an architecture that uses one or a collaborative multitude of end-user clients or near-user edge devices to carry out a substantial amount of storage (rather than stored primarily in cloud data centers), communication (rather than routed over the internet backbone), and control, configuration, measurement and management (rather than controlled primarily by network gateways such as those in the LTE (telecommunication) core).
It seems that Fog Computing is moving the program to data on network edge while cloud computing is moving data on network edge to data centers. Is my understanding correct?
http://en.wikipedia.org/wiki/Fog_computing
Yes, I would say your conclusion is correct that the cloud in centralized vs. the fog that is built by close devices at the edge of the network, but a problem with a new term is the lack of agreement.
Bonomi et. al. writes:
Fog Computing is a highly virtualized platform that provides
compute, storage, and networking services between
end devices and traditional Cloud Computing Data Centers,
typically, but not exclusively located at the edge of network.
See following papers about the fog:
Flavio Bonomi, Rodolfo Milito, Jiang Zhu, and Sateesh Addepalli. 2012. Fog computing and its role in the internet of things. In Proceedings of the first edition of the MCC workshop on Mobile cloud computing (MCC '12). ACM, New York, NY, USA, 13-16. http://doi.acm.org/10.1145/2342509.2342513
Luis M. Vaquero and Luis Rodero-Merino. 2014. Finding your Way in the Fog: Towards a Comprehensive Definition of Fog Computing. SIGCOMM Comput. Commun. Rev. 44, 5 (October 2014), 27-32. http://doi.acm.org/10.1145/2677046.2677052
Best regards!
Article Fog Computing and its Role in the Internet of Things
Yes, I would say your conclusion is correct that the cloud in centralized vs. the fog that is built by close devices at the edge of the network, but a problem with a new term is the lack of agreement.
Bonomi et. al. writes:
Fog Computing is a highly virtualized platform that provides
compute, storage, and networking services between
end devices and traditional Cloud Computing Data Centers,
typically, but not exclusively located at the edge of network.
See following papers about the fog:
Flavio Bonomi, Rodolfo Milito, Jiang Zhu, and Sateesh Addepalli. 2012. Fog computing and its role in the internet of things. In Proceedings of the first edition of the MCC workshop on Mobile cloud computing (MCC '12). ACM, New York, NY, USA, 13-16. http://doi.acm.org/10.1145/2342509.2342513
Luis M. Vaquero and Luis Rodero-Merino. 2014. Finding your Way in the Fog: Towards a Comprehensive Definition of Fog Computing. SIGCOMM Comput. Commun. Rev. 44, 5 (October 2014), 27-32. http://doi.acm.org/10.1145/2677046.2677052
Best regards!
Article Fog Computing and its Role in the Internet of Things
I do not really understand the need for new terms such as fog or sky computing except for marketing purposes. Cloud computing at its basis means on-demand distributed virtualized execution of applications. Data can be passed to applications or applications can be moved to data. The approach depends on the particular problem.
Say for instance you have an app that needs to process very fast geographically distributed Big Data. Like social network analysis of data stored in multiple data centers. In this case due to the network overhead and time constraints the app can be moved to the data. Other constraints such as cost of moving the data out of a particular cloud region could make the app-to-data preferable.
For the second case of data-to-app think of applications where data is gathered remotely by sensors and transmitted over the network in a central place. For instance weather data. A climate analysis tool can then be deployed on demand on the server storing the data for processing.
Of course for the second case some pre-processing can be done near-the-edge, especially for vital apps requiring some sort of independent analysis. Think traffic flow optimization where the microcontroller installed on a car could do some local data analysis before synchronizing with the rest of the network.
You may consider "Fog as an expansion of the Cloud paradigm" (R. Milito from CISCO) , but the cloud model already has similar concept, such as internal/community clouds, where data are processed closer to data source (near the edge).
In cloud computing data is stored in Data center server... for more fog computing refer
Preprint Fog Computing (Poster)
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