| By Ignacio M. Llorente |
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| June 8, 2011 01:00 PM EDT |
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I am often asked about the steps to be taken and the issues to be considered for a successful migration to cloud computing. There is no magic formula to it, the specific steps will depend on your internal structure, industry and differentiation in the market. As general framework, I usually recommend the Decision Framework for Cloud Migration described in the Federal Cloud Computing Strategy together with a thorough study and comparison of cloud providers tailored to your needs and requirements. The three main guidelines would be:
- Shifting from Infrastructure to Service Management. This is a shift in mindset of the IT staff. We should be able to define our needs in terms of services (applications) and their expected quality of service. IT staff usually express their needs and requirements using infrastructure terms, I need 4 physical boxes to run the web server for a new site. However needs should be described in terms of service elasticity rules, this is in terms of service level objectives using key performance indicators, In order to ensure an optimal quality of service, I need to automatically scale the number of servers when the average CPU utilization of the running web servers exceeds a given threshold.
- Prioritizing Services that Are Best Suited for Migration. This prioritization should be performed according to its readiness to be executed on cloud; its affinity to the cloud model in terms of security, performance, relevance and duration; and the expected gain in terms of costs, performance, quality, agility, and innovation.
- Selecting the Best Cloud Provider. This selection is critical if we consider that given the current lack of interoperability and portability, the change to other provider in the future may be time-consuming and expensive. Besides the Price-Performance-Reliability metric, the following aspects should be considered: data protection, privacy and regulatory issues; support for business continuity; and level of control exposed to users. You could also conclude that best solution is to use different providers for different workloads.
These three guidelines constitute a very simple model to support organizations in adopting cloud computing. I will elaborate on each one shortly.
Ignacio M. Llorente, Ph.D in Computer Science (UCM) and Executive MBA (IE Business School), is a Full Professor (Catedratico) in Computer Architecture and the Head of the Distributed Systems Architecture Group at UCM, and Chief Executive Advisor and co-founder of the C12G Labs technology start-up. He held several appointments as independent IT expert for the European Commission and several companies and national governments; and consultant positions at ICASE NASA Langley and Sun Microsystems. Prof. Llorente is one of the pioneers and world's leading authorities on Cloud Computing. He has served on several Groups of Experts on Cloud Computing convened by international organizations, such as the European Commission and the World Economic Forum, and has contributed to several Cloud Computing panels and roadmaps. He is the Director of the OpenNebula Open-Source Project and participates in the main European projects in Cloud Computing. He founded and co-chaired the Open Grid Forum Working Group on Open Cloud Computing Interface. Prof. Llorente has given many keynotes and invited talks in the main international events in cloud computing, and has contributed to several cloud computing panels and roadmaps.
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