Cloud computing
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This document defines and compares different types of cloud computing services: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), Software as a Service (SaaS), Storage as a Service (STaaS), and Database as a Service (DBaaS). It notes that cloud computing provides on-demand access to configurable computing resources via a network, typically with a pay-per-use model. The different service models offer varying levels of virtualized resources and control, from IaaS providing virtual machines to SaaS providing fully managed application software. Benefits of cloud computing include cost efficiency, reliability, scalability, performance, security and reduced maintenance burden.
Cloud computing
- 2. What is cloud computing? “.. use of computing resources (hardware and software) that are delivered as a service over a network (typically the Internet).” – Wikipedia “.. a pay-per-use model for enabling available, convenient, on-demand network access to a shared pool of configurable resources.” - NIST
- 3. Common Ground? • Pay-per-use (no commitment). • Elastic capacity – scale up/down on demand. • Resources are virtualized.
- 4. Service Models • Infrastructure as a Service (IaaS) • Platform as a Service (PaaS) • Software as a Service (SaaS) • Storage as a Service (STaaS) • Database as a Service (DBaaS)
- 5. Infrastructure as a Service Providers offer computers, as physical or more often virtual machines, and other resources. Bill IaaS services on a utility computing basis, that is, cost reflects the amount of resources allocated and consumed. Example : Amazon EC2, Rackspace Cloud
- 6. Platform as a Service Providers provide a computing platform and a solution stack as a service. Billing on a utility computing basis Example : Google app engine, Heroku, Appfog
- 7. Software as a Service Providers install and operate application software in the cloud. Users do not manage the infrastructure and platform which the application is running. Billing is yearly and monthly. Example : Gmail, Facebook
- 8. Storage as a Service Service providers rents space in their storage infrastructure. Billed on a utility computing basis. Example : Amazon S3, Rackspace Cloud Storage
- 9. Database as a Service Providers provide hosted and managed database as a service. Billing on a utility computing basis. Example : Mongolab, Rackspace Cloud Database
- 10. Why Cloud? • Cost Efficient • Reliability • Scalability and elasticity • Performance • Security • Maintenance
- 11. Who are using cloud? • GitHub (Rackspace) • Instagram (Amazon) • Foursquare (Amazon) • Appfog (Rackspace) • Unilever (Amazon)
- 12. Thank You
- 13. QUESTIONS