Cloud Computing

Cloud computing (CC) is the provision of

dynamically scalable and often virtualised

resources as a service over the Internet on a

utility basis

- Users need not have knowledge of, expertise

in, or control over the technology infrastructure

in the "cloud" that supports them.

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Cloud Computing - Terms

- Scalability is a desirable property of a system,

a network, or a process, which indicates its

ability to either handle growing amounts of work

in a graceful manner or to be readily enlarged

- Virtualization is a term that refers to the

abstraction of computer resources (ex: Virtual

machine (VM), a software implementation of a

machine (computer) that executes programs like a real

machine)

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Cloud Computing - Definition

- Cloud computing services often provide

common business applications online that are

accessed from a web browser, while the

software and data are stored on the servers.

- Clouds have five essential characteristics: ondemand

self-service, broad network access,

resource pooling, rapid elasticity, and measured

service.

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CC - Key characteristics

Agility

- improves with users able to rapidly and

inexpensively re-provision technological

infrastructure resources. The cost of overall

computing is unchanged, however, and the

providers will merely absorb up-front costs and

spread costs over a longer period.

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