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The cloud (simple explanation of SaaS, IaaS and PaaS)


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Discussed the cloud with my friend and threw this together on the fly.

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The cloud (simple explanation of SaaS, IaaS and PaaS)

  1. 1. The Cloud (as I explained to my friend) Allen Prattis
  2. 2. SaaS (Software as a Service)  Allowing users to access specific applications on-line  Advantage  Charge on a subscriptions basis  Disadvantage  Generic applications may not work
  3. 3. PaaS (Platform as a Service)  Provide environment to allow for users to create their own web applications   Azure – Microsoft App Engine – Google   – SalesForce   Pros     Build and Run one application for Free RAD (rapid application development) Private or public deployment Cons  Build and Run one application for Free Limits developers to tools provided by the PaaS developer Risk of Vendor lock in
  4. 4. Iaas (Infrastructure as a Service)    Allow business to run whatever applications that the business has to a cloud supplier’s hardware Migrate applications to the suppliers hardware Physical or virtual servers   Virtualization – allow for suppliers to share physical servers Pros  Lower IT costs
  5. 5. IaaS Types  Private Cloud   Dedicated Hosting    Customer rents physical servers on demand Cost and numbers of servers matching their demand Hybrid Hosting   Most secure and costly Mix of physical and virtual servers are hosted on demand of the customer to reduce costs and increase flexibility Cloud Hosting  Customer rents virtual servers on demand and often on an hourly basis
  6. 6. IaaS Vendors  Amazon   Web Services Offers many options Preconfigured software from Oracle, IBM, etc  Rackspace  Private cloud to Cloud Hosting  GoGrid  Cloud hosting, Hybrid hosting, Dedicated hosting