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  2. 2. Contents <ul><li>Introduction to cloud computing </li></ul><ul><li>As a service </li></ul><ul><li>IaaS </li></ul><ul><li>PaaS </li></ul><ul><li>SaaS </li></ul><ul><li>Advantages </li></ul>
  3. 3. 1.Introduction to cloud computing <ul><li>Internet based computing </li></ul><ul><li>It invovles delivering hosted services like Haas,IaaS,SaaS over the internet </li></ul><ul><li>It has three distinct characteristics as </li></ul><ul><li>-> Sold on demand </li></ul><ul><li>-> Elastic </li></ul><ul><li>-> Service is fully managed by the provider </li></ul>
  4. 4. Cloud computing concept
  5. 5. 2.As a Service
  6. 6. 3.IaaS <ul><li>Stands for Infrastructure as a Service </li></ul><ul><li>Computer infrastructure access wia the web </li></ul><ul><li>It provides the underlying hardwares & opertaing system resources to do anything,so it is reffered as Everything as a Service </li></ul><ul><li>Ability tp pay only for what we use,so also referred as Utility computing </li></ul>
  7. 7. Benefits of IaaS <ul><li>Ability to scale </li></ul><ul><li>Minimum cost </li></ul><ul><li>Suitable for small business </li></ul><ul><li>Offers CPU,memory,networking & security </li></ul>
  8. 8. IaaS providers <ul><li>Amazon -Rackspace cloud </li></ul><ul><li>Joyent -Facebook applications & social network LinkedIn </li></ul><ul><li>GoGrid </li></ul><ul><li>Flexiscale </li></ul>
  9. 9. 4.PaaS <ul><li>Platform as a Service </li></ul>
  10. 10. PaaS(cont.)‏ <ul><li>Platform as a Service (PaaS) is a delivery of a computing platform over the web. </li></ul><ul><li>is defined as a set of software and product development tools hosted on the provider's infrastructure. </li></ul>
  11. 11. PaaS(cont.)‏ <ul><li>IDE -a software development system </li></ul><ul><li>ISV -Independent Software Vendors </li></ul>
  12. 12. Benefits of PaaS <ul><li>For Developers </li></ul><ul><li>focus only on innovation </li></ul><ul><li>Easy & quick development </li></ul><ul><li>Integration with other web services </li></ul><ul><li>Lower risk & improved Profitability </li></ul><ul><li>For Users </li></ul><ul><li>Minimize operational costs </li></ul><ul><li>Access to information anywhere, anytime </li></ul><ul><li>Easy collaboration </li></ul><ul><li>Secured and customized access </li></ul>
  13. 13. PaaS providers <ul><li>Google app Engine(GAE)‏ </li></ul><ul><li> </li></ul><ul><li>Coghead </li></ul><ul><li>Aptana Cloud </li></ul>
  14. 14. 5.SaaS <ul><li>Software as a Service </li></ul>
  15. 15. SaaS <ul><li>Is is also a way of delivering application over the internet-as a service </li></ul><ul><li>Instead of installing & maintaining software,we can simply access it via the internet </li></ul><ul><li>It is sometime called as Web-based software,on demand software,or hosted software </li></ul><ul><li>SaaS applicatiion runs on a SaaS provider's server </li></ul>
  16. 16. SaaS Characteristics <ul><li>A way to understand SaaS model is Banking system,where the privacy of each customer is maintained </li></ul><ul><li>Multitenant Architecture -all users share the single infrastructure and code which is centrally maintained </li></ul><ul><li>Easy customization </li></ul><ul><li>Better access </li></ul>
  17. 17. SaaS Benefits <ul><li>For Users </li></ul><ul><li>Lower costs </li></ul><ul><li>Fewer personnel </li></ul><ul><li>Smaller storage requirements </li></ul><ul><li>For vendors </li></ul><ul><li>Continous stream of income </li></ul><ul><li>Avoid piracy </li></ul><ul><li>Reduce loss </li></ul>
  18. 18. SaaS providers <ul><li> is the largest SaaS providers </li></ul><ul><li>Google applications </li></ul><ul><li>Web 2.0 </li></ul>
  19. 19. Overall Advantages <ul><li>Lower Cost </li></ul><ul><li>Low risk & more profit </li></ul><ul><li>Occupied smaller space </li></ul><ul><li>No need to maintain hardware </li></ul><ul><li>Both benefits for developers/vendors & users </li></ul>