Cloud Computing

Cloud computing is an information technology (IT) paradigm that enables ubiquitous access to shared pools of configurable system resources and higher-level services that can be rapidly provisioned with minimal management effort, often over the Internet. Cloud computing relies on sharing of resources to achieve coherence and economy of scale, similar to a utility.

Third-party clouds enable organizations to focus on their core businesses instead of expending resources on computer infrastructure and maintenance. Advocates note that cloud computing allows companies to avoid or minimize up-front IT infrastructure costs. The availability of high-capacity networks, low-cost computers and storage devices as well as the widespread adoption of hardware virtualization, service-oriented architecture, and autonomic and utility computing has led to growth in cloud computing.

  • Service models
    • Infrastructure as a service (IaaS)
    • Platform as a service (PaaS)
    • Software as a service (SaaS)
    • Mobile "backend" as a service (MBaaS)
    • Serverless computing
  • Deployment models
    • Private cloud
    • Public cloud
    • Hybrid cloud
    • Others
      • Community cloud
      • Distributed cloud
      • Multicloud
      • HPC cloud
    • Architecture
      • Cloud engineering
    • Security and privacy
    • Limitations and disadvantages
    • Emerging trends