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Cloud Architecture

Cloud Architecture. Chapter 2. SPI Model. Cloud Computing Classification Model – SPI - SaaS: (Software as a Service) - PaaS (Platform as a Service) - IaaS (Infrastructure as a Service). Infrastructure services share the physical hardware

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Cloud Architecture

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  1. Cloud Architecture Chapter 2

  2. SPI Model • Cloud Computing Classification Model – SPI - SaaS: (Software as a Service) - PaaS (Platform as a Service) - IaaS (Infrastructure as a Service)

  3. Infrastructure services share the physical hardware • Platform services application framework • Software services share the entire software stack.

  4. Amazon Elastic Compute Cloud (EC2) is a classic example of IaaS • Google App Engine is generally considered to be a PaaS • Salesforce.com is a well known example of SaaS.

  5. Cloud Delivery Model • Public Cloud • Private Cloud • Partner Cloud • Community Cloud • Hybrid or Multi-sourced Delivery

  6. Public cloud: It has large set of the following features: - Off-premise - Elastisity - Flexible billing - Virtualization - Service delivery - Universal access - Simplified management - Affordable resources - Multi-tenancy - Service level management

  7. Private Cloud: only leverages some of the aspects of cloud computing - hosted on-premise, - scales “only” into the hundreds or perhaps thousands of nodes, - connected primarily to the using organization through private network links. - since all applications and servers are shared within the corporation the notion of multi-tenancy is minimized.

  8. Partner Cloud: Large IT providers, such as HP Enterprise Services or IBM Global Services, run data center for operations for large customers - manage services in their own facilities; - or on customer premises; - or on property of a third party

  9. Community Cloud: it caters a group of organizations with common set of requirements or objectives. • The most prominent examplea are government clouds that are open to federal and municipal agencies.

  10. Hybrid or Multi-sourced delivery:

  11. Cloud and Open Source • Cloud computing can leverage open source in many ways. - Self-supported Linux is by far the most popular opernating system from infrastructure servies - Cloud provider often use Xen and KVM for virtualization - Distributed cloud framwworks, such as Hadoop, are usally open source - Web-based API make the client device less relevant, which can reduce desktop license fees by adopting Linux, Google Chrome or other open-souce client.

  12. - Many SaaS solutions leverage open-source software, such as SugarCRM

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