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cloud computing (definition (refers to application delivered as service…
cloud computing
definition
refers to application delivered as service over the Internet and the hardware and systems software in the data centers that provide those services
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virtualization
the creation of virtual machine that acts like a real computer with an operating system (virtual machine)
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evaluation
advantage
large-scale multi-tenancy achieves significant economic advantages ($0.1, $3.57)
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transform high-fixed capital costs to low variable expenses (supply an overflow service capacity as demand increases)
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disadvantage
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data security
data confidentiality, insider attacks and protect customers from each other
performance
no standardized method todo bulk transformation of data, has data transfer cost
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reputation fate sharing
neighbours may affect each other, although provider don't want to be responsible for this
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public cloud
pay-go service available to general public, sold utility computing
private cloud
internal data centers of a business or other organization, not available to outsider