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|Title:||The impact of user rationality in federated clouds|
|Citation:||CCGrid 2012: Proceedings of the 12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, 2012 / Balaji, P., Buyya, R., Majumdar, S., Pandey, S. (ed./s), pp.620-627|
|Conference Name:||2012 12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid 2012) (13 May 2012 - 16 May 2012 : Ottawa, Canada)|
|Marian Mihailescu, Yong Meng Teo|
|Abstract:||With cloud computing, the long-envisioned dream of computing as utility is achieved. Many of the current standalone cloud providers offer resources and services using pay-per-use fixed pricing. Spot pricing, recently introduced in Amazon EC2, is more efficient by setting the resource price dynamically, based on demand. However, this pricing scheme, similar to the uniform price auction, is truthful only when supply can be adjusted, such as the case of a standalone cloud provider. In a federated cloud, where resources from multiple cloud providers are integrated to increase elasticity and reliability, rational users can have a greater impact. In this paper, we evaluate the impact of rationality in a federated cloud, by comparing the consumer welfare achieved by spot pricing, currently used in Amazon EC2, and a strategy-proof pricing scheme. We consider different EC2 regions as providers in a federated cloud, and use traces of spot prices to determine the consumer requests and the user welfare. Our results show that spot pricing is not suitable in a federated cloud, where rational users can increase their welfare by being untruthful.|
|Keywords:||rationality; cloud computing; spot pricing; federated clouds|
|Rights:||© 2012 IEEE|
|Appears in Collections:||Civil and Environmental Engineering publications|
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