A Study of Cloud Computing

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SummaryDefinitionEvolutionsFeaturesAdvantage and DisadvantageType of ServicesResearch topics

Definition of Cloud Computing

Cloud Computingis

Fuzzy Word

Definition of Cloud Computing"Clouds are vast resource pools with on-

demand resource allocation.Jan Pritzker

“The analogy that finally made sense to them is what I will call 'cloud dining.‘”Omar Sultan

"Cloud computing is ... the user-friendly version of grid computing.“Trevor Doerksen

My Definition“Cloud

computing is on-demand resource provide to users by guarantees of services.”

Evolution of Cloud Computing

Grid ComputingShare CPU between organization

Utility Computing

Grid Computing + Pay-per-use

Software as a Service (SaaS)

Cloud ComputingGrid

+

Utility+

SaaS+

SLA

Advantage of Cloud ComputingReduce CostPerformanceScalability

Disadvantage of Cloud ComputingMust have stable internetSlow than local softwareConcern about reliable and security

Type of Services

Software as a Service (SaaS)

Platform as a Service (PaaS)Web hostingWeb application Framework

Infrastructure as a Service (IaaS)Virtualization

Data Storage as a Service (dSaaS)StorageDatabase

Research Topics in CloudMeta-Cloud, Inter-CloudVirtual Machine Placement

Live MigrationVM Schedule

OptimizationReliability & SecurityStandardGreen IT

Q & A