Cloud migration: A Case Study of Migrating an Enterprise IT System to IaaS

Ian Sommerville, David Samuel Greenwood, Ali Khajeh-Hosseini

Research output: Contribution to conferencePaperpeer-review

236 Citations (Scopus)


This case study illustrates the potential benefits and risks associated with the migration of an IT system in the oil & gas industry from an in-house data center to Amazon EC2 from a broad variety of stakeholder perspectives across the enterprise, thus transcending the typical, yet narrow, financial and technical analysis offered by providers. Our results show that the system infrastructure in the case study would have cost 37% less over 5 years on EC2, and using cloud computing could have potentially eliminated 21% of the support calls for this system. These findings seem significant enough to call for a migration of the system to the cloud but our stakeholder impact analysis revealed that there are significant risks associated with this. Whilst the benefits of using the cloud are attractive, we argue that it is important that enterprise decision-makers consider the overall organizational implications of the changes brought about with cloud computing to avoid implementing local optimizations at the cost of organization-wide performance.
Original languageEnglish
Number of pages8
Publication statusPublished - 2010
Event3rd IEEE International Conference on Cloud Computing - Miami, FL, United States
Duration: 5 Jul 201010 Aug 2010


Conference3rd IEEE International Conference on Cloud Computing
Country/TerritoryUnited States
CityMiami, FL


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