Tuesday, February 26, 2013

I'd like a little cloud please...

Cloud computing refers to an IT service model and platform that provides on-demand based IT services over the Internet.

It is composed of 5 essential characteristics, 4 deployment models and 3 service models.

Five essential characteristics
  • on-demand self-service
  • broad network access
  • resource pooling
  • rapid elasticity
  • measured Service
Four major deployment models
  • private cloud
  • public cloud
  • community cloud
  • hybrid cloud
Three service models
  • SasS (Software as a Service)
    • salesforce.com – Customer Relationship Management (CRM) service, Google Gmail
  • PaaS (Platform as a Service)
    • Google App Engine, Microsoft’s Azure
  • IaaS (Infrastructure as a Service)
    • Amazon Elastic Compute Cloud (EC2), VMware vCloud Datacenter

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