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分类: 云计算

2012-03-27 13:40:58


In this posting, I summarize my prior three posts on the three cloud computing offerings: Infrastructure as a Service (), Platform as a Service () and Software as a Service ().

I concentrate how the three offerings differ with respect to flexibility, maintenance and portability. One of the greatest challenges companies face when moving to the cloud is security. Thus I will devote an entire blog post in the future, to security concerns.

Flexibility

  • How much flexibility do you have with each offering?
  • What can you change or modify within each cloud offering to suit your needs?
  • Can you modify the software, the look-and-feel, the branding, the hardware even the source code with each cloud offering?


Flexibility

Maintenance

  • How much do you need to maintain with each cloud offering?
  • Do you need to hire programmers, data analysts, system administrators or just application users to use each cloud offering?
  • Can you modify the software, the look-and-feel, the branding, the hardware even the source code with each cloud offering?


Maintenance

Portability

  • If your application is hosted at either an IaaS, PaaS or SaaS provider, what are your options if you need to transfer your application and data to another provider?
  • In what format will your data be provided to you?
  • How easily can you download or extract your data and in what format will it be provided to you?


Portability

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