Computação em Nuvem

Computação em Nuvem
António Lopes

Conceito
Utilização das capacidades de armazenamento e cálculo de computadores e servidores compartilhados e interligados por meio da Internet, seguindo o princípio da computação em grade.
Computação em Grade:
Modelo computacional que divide as tarefas entre diversas máquinas, podendo ser em rede local ou rede de longa distância, que formam uma máquina virtual.
Arquitetura Simples da Computação em Nuvem

Origem da Idéia
The general idea behind the technology dates back to the 1960s, when John McCarthy wrote that “computation may someday be organized as a public utility.” Then, grid computing, a concept that originated in the early 1990s as an idea for making computer power as easy to access as an electric power grid also contributed to cloud computing. For a detailed look at the differences between utility, grid and cloud computing, look at “Cloud Computing vs. Utility Computing vs. Grid Computing: Sorting The Differences.”

Origem do Termo
The term “cloud computing” was most probably derived from the diagrams of clouds used to represent the Internet in textbooks. The concept was derived from telecommunications companies who made a radical shift from point-to-point data circuits to Virtual Private Network (VPN) services in the 1990s. By optimizing resource utilization through load balancing, they could get their work done more efficiently and inexpensively. The first time the term was used in its current context was in a 1997 lecture by Ramnath Chellappa where he defined it as a new “computing paradigm where the boundaries of computing will be determined by economic rationale rather than technical limits alone.”

Origem do Símbolo
The origin of the term cloud computing was derived from the practice of using drawings of stylized clouds to denote networks in diagrams of computing and communications systems. The word cloud was used as a metaphor for the Internet, based on the standardized use of a cloud-like