CloudResearch(云服务)_09.docVIP

The RESERVOIR Model and Architecture for Open Federated Cloud Computing B. Rochwerger D. Breitgand E. Levy A. Galis K. Nagin I. Llorente R. Montero Y. Wolfsthal E. Elmroth J. Caceres M. Ben-Yehuda W. Emmerich F. Galan′ Abstract The emerging cloud computing paradigm is rapidly gaining momentum as an alterna-tive to traditional IT. However, contemporary cloud computing offerings are mostly geared towards Web 2.0 style applications and only recently have begun to address the needs of enterprise-grade solutions, such as support for infrastructure-level SLAs. To address the challenges and deficiencies in the current state of the art, we propose a modular, extensible cloud architecture with intrinsic support for Business Service Man-agement (BSM) and federation of clouds. Our goal is to facilitate an open, service-based, on-line economy, where resources and services are transparently provisioned and managed across clouds on an on-demand basis at competitive costs with high quality of service. We present the vision driving the RESERVOIR project - an architecture that allows providers of cloud infrastructure to dynamically partner with each other to create a seem-ingly infinite pool of IT resources while fully preserving the autonomy of technological and business management decisions. To this end, RESERVOIR leverages and extends the ad-vantages of virtualization and embeds autonomous management into the infrastructure. At the same time, the RESERVOIR approach aims to achieve a very ambitious goal - creating a foundation for next-generation enterprise-grade cloud computing. 1 Introduction In the Web 2.0 era, companies grow from inception to a massive scale at incredible rates. For example, MySpace acquired 20 million users in two years; YouTube reached the same number of users in just 16 months [1]. However, to leverage this potential rate of growth, companies must properly address critical business decisions related to their service delivery infrastructure. The eme