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System management to comply with SLA availability guarantees in cloud computing

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2 Author(s)
Andres J. Gonzalez ; Centre for Quantifiable Quality of Service in Communication Systems, Norwegian University of Science and Technology O.S. Bragstads plass 2E, N-7491. Trondheim, Norway ; Bjarne E. Helvik

SLAs are common means to define specifications and requirements of cloud computing services in business relationships. The terms that define the guaranteed availability for a given period are fundamental to these contracts. In this context, a natural question for cloud providers is: How to guarantee the availability promised? This paper studies the level of availability offered to a virtual machine during an SLA period in clouds with different: size, redundancy, and fault tolerance techniques. Finally, this paper proposes the use of the SLA -budget for the implementation of smart policies in: i) the assignment of spare servers when virtual machines are restored. ii) the dynamic use of different fault tolerance licenses. Using such policies results in a considerable reduction of the probability of breaching the SLA guarantee, by making an efficient use of the cloud resources available. This paper is a first step in the design of SLA-aware cloud architectures.

Published in:

Cloud Computing Technology and Science (CloudCom), 2012 IEEE 4th International Conference on

Date of Conference:

3-6 Dec. 2012