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Cloud Service Models

1. IaaS
   • Delivers infrastructure, outsourced physical hardware and hosting
2. PaaS
   • Deliver computing platform as a stack, outsource managing hardware, software and provisioning of hosting
3. SaaS
   • Deliver usable application, outsource all infrastructure and application capabilities

Deployment Models

1. Public Cloud
   1. Utility Pricing
   2. Elasticity
   3. Core Competency
2. Private Cloud
3. Hybrid Cloud
4. Community Cloud

Worst Practices

Migrating Applications to the Cloud

• Requires work
• System needs to be loosely coupled to infrastructure
• System has to be stateless /RESTful/
• Diff between Host and Cloud Cloud Security
• Myths
• Cloud computing sometimes thought of as insecure and data cannot be placed in public cloud for any reason (resort to private cloud without competency)
• Cloud competing security is solely taken care of vendors

Multi Tenancy vs Single Tenant

1. Total Isolation
2. Data Isolation
3. Data Segregation

Data Store Type