| dc.description.abstract | Recently, massive migration of enterprise applications to the cloud has been recorded in
the Information Technology (IT) world. The number of cloud providers offering their
services and the number of cloud customers interested in using such services is rapidly
increasing. However, one of the challenges of cloud computing is Quality-of-Service
management which denotes the level of performance, reliability, and availability offered
by cloud service providers. Quality-of-Service is fundamental to cloud service providers
who find the right tradeoff between Quality-of-Service levels and operational cost. In
order to find out the optimal tradeoff, cloud service providers need to comply with service
level agreements contracts which define an agreement between cloud service providers
and cloud customers. Service level agreements are expressed in terms of quality of service
(QoS) parameters such as availability, scalability performance and the service cost. On
the other hand, if the cloud service provider violates the service level agreement contract,
the cloud customer can file for damages and claims some penalties that can result in
revenue losses, and probably detriment to the provider’s reputation. Thus, the goal of
any cloud service provider is to meet the Service level agreements, while reducing the
total cost of offering its services. | en_US |
